diff options
Diffstat (limited to 'libraries/SD/utility')
| -rw-r--r-- | libraries/SD/utility/FatStructs.h | 418 | ||||
| -rw-r--r-- | libraries/SD/utility/Sd2Card.cpp | 644 | ||||
| -rw-r--r-- | libraries/SD/utility/Sd2Card.h | 233 | ||||
| -rw-r--r-- | libraries/SD/utility/Sd2PinMap.h | 353 | ||||
| -rw-r--r-- | libraries/SD/utility/SdFat.h | 547 | ||||
| -rw-r--r-- | libraries/SD/utility/SdFatUtil.h | 71 | ||||
| -rw-r--r-- | libraries/SD/utility/SdFatmainpage.h | 202 | ||||
| -rw-r--r-- | libraries/SD/utility/SdFile.cpp | 1253 | ||||
| -rw-r--r-- | libraries/SD/utility/SdInfo.h | 232 | ||||
| -rw-r--r-- | libraries/SD/utility/SdVolume.cpp | 295 |
10 files changed, 4248 insertions, 0 deletions
diff --git a/libraries/SD/utility/FatStructs.h b/libraries/SD/utility/FatStructs.h new file mode 100644 index 0000000..f5bdaa5 --- /dev/null +++ b/libraries/SD/utility/FatStructs.h @@ -0,0 +1,418 @@ +/* Arduino SdFat Library
+ * Copyright (C) 2009 by William Greiman
+ *
+ * This file is part of the Arduino SdFat Library
+ *
+ * This Library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This Library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the Arduino SdFat Library. If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+#ifndef FatStructs_h
+#define FatStructs_h
+/**
+ * \file
+ * FAT file structures
+ */
+/*
+ * mostly from Microsoft document fatgen103.doc
+ * http://www.microsoft.com/whdc/system/platform/firmware/fatgen.mspx
+ */
+//------------------------------------------------------------------------------
+/** Value for byte 510 of boot block or MBR */
+uint8_t const BOOTSIG0 = 0X55;
+/** Value for byte 511 of boot block or MBR */
+uint8_t const BOOTSIG1 = 0XAA;
+//------------------------------------------------------------------------------
+/**
+ * \struct partitionTable
+ * \brief MBR partition table entry
+ *
+ * A partition table entry for a MBR formatted storage device.
+ * The MBR partition table has four entries.
+ */
+struct partitionTable {
+ /**
+ * Boot Indicator . Indicates whether the volume is the active
+ * partition. Legal values include: 0X00. Do not use for booting.
+ * 0X80 Active partition.
+ */
+ uint8_t boot;
+ /**
+ * Head part of Cylinder-head-sector address of the first block in
+ * the partition. Legal values are 0-255. Only used in old PC BIOS.
+ */
+ uint8_t beginHead;
+ /**
+ * Sector part of Cylinder-head-sector address of the first block in
+ * the partition. Legal values are 1-63. Only used in old PC BIOS.
+ */
+ unsigned beginSector : 6;
+ /** High bits cylinder for first block in partition. */
+ unsigned beginCylinderHigh : 2;
+ /**
+ * Combine beginCylinderLow with beginCylinderHigh. Legal values
+ * are 0-1023. Only used in old PC BIOS.
+ */
+ uint8_t beginCylinderLow;
+ /**
+ * Partition type. See defines that begin with PART_TYPE_ for
+ * some Microsoft partition types.
+ */
+ uint8_t type;
+ /**
+ * head part of cylinder-head-sector address of the last sector in the
+ * partition. Legal values are 0-255. Only used in old PC BIOS.
+ */
+ uint8_t endHead;
+ /**
+ * Sector part of cylinder-head-sector address of the last sector in
+ * the partition. Legal values are 1-63. Only used in old PC BIOS.
+ */
+ unsigned endSector : 6;
+ /** High bits of end cylinder */
+ unsigned endCylinderHigh : 2;
+ /**
+ * Combine endCylinderLow with endCylinderHigh. Legal values
+ * are 0-1023. Only used in old PC BIOS.
+ */
+ uint8_t endCylinderLow;
+ /** Logical block address of the first block in the partition. */
+ uint32_t firstSector;
+ /** Length of the partition, in blocks. */
+ uint32_t totalSectors;
+};
+/** Type name for partitionTable */
+typedef struct partitionTable part_t;
+//------------------------------------------------------------------------------
+/**
+ * \struct masterBootRecord
+ *
+ * \brief Master Boot Record
+ *
+ * The first block of a storage device that is formatted with a MBR.
+ */
+struct masterBootRecord {
+ /** Code Area for master boot program. */
+ uint8_t codeArea[440];
+ /** Optional WindowsNT disk signature. May contain more boot code. */
+ uint32_t diskSignature;
+ /** Usually zero but may be more boot code. */
+ uint16_t usuallyZero;
+ /** Partition tables. */
+ part_t part[4];
+ /** First MBR signature byte. Must be 0X55 */
+ uint8_t mbrSig0;
+ /** Second MBR signature byte. Must be 0XAA */
+ uint8_t mbrSig1;
+};
+/** Type name for masterBootRecord */
+typedef struct masterBootRecord mbr_t;
+//------------------------------------------------------------------------------
+/**
+ * \struct biosParmBlock
+ *
+ * \brief BIOS parameter block
+ *
+ * The BIOS parameter block describes the physical layout of a FAT volume.
+ */
+struct biosParmBlock {
+ /**
+ * Count of bytes per sector. This value may take on only the
+ * following values: 512, 1024, 2048 or 4096
+ */
+ uint16_t bytesPerSector;
+ /**
+ * Number of sectors per allocation unit. This value must be a
+ * power of 2 that is greater than 0. The legal values are
+ * 1, 2, 4, 8, 16, 32, 64, and 128.
+ */
+ uint8_t sectorsPerCluster;
+ /**
+ * Number of sectors before the first FAT.
+ * This value must not be zero.
+ */
+ uint16_t reservedSectorCount;
+ /** The count of FAT data structures on the volume. This field should
+ * always contain the value 2 for any FAT volume of any type.
+ */
+ uint8_t fatCount;
+ /**
+ * For FAT12 and FAT16 volumes, this field contains the count of
+ * 32-byte directory entries in the root directory. For FAT32 volumes,
+ * this field must be set to 0. For FAT12 and FAT16 volumes, this
+ * value should always specify a count that when multiplied by 32
+ * results in a multiple of bytesPerSector. FAT16 volumes should
+ * use the value 512.
+ */
+ uint16_t rootDirEntryCount;
+ /**
+ * This field is the old 16-bit total count of sectors on the volume.
+ * This count includes the count of all sectors in all four regions
+ * of the volume. This field can be 0; if it is 0, then totalSectors32
+ * must be non-zero. For FAT32 volumes, this field must be 0. For
+ * FAT12 and FAT16 volumes, this field contains the sector count, and
+ * totalSectors32 is 0 if the total sector count fits
+ * (is less than 0x10000).
+ */
+ uint16_t totalSectors16;
+ /**
+ * This dates back to the old MS-DOS 1.x media determination and is
+ * no longer usually used for anything. 0xF8 is the standard value
+ * for fixed (non-removable) media. For removable media, 0xF0 is
+ * frequently used. Legal values are 0xF0 or 0xF8-0xFF.
+ */
+ uint8_t mediaType;
+ /**
+ * Count of sectors occupied by one FAT on FAT12/FAT16 volumes.
+ * On FAT32 volumes this field must be 0, and sectorsPerFat32
+ * contains the FAT size count.
+ */
+ uint16_t sectorsPerFat16;
+ /** Sectors per track for interrupt 0x13. Not used otherwise. */
+ uint16_t sectorsPerTrtack;
+ /** Number of heads for interrupt 0x13. Not used otherwise. */
+ uint16_t headCount;
+ /**
+ * Count of hidden sectors preceding the partition that contains this
+ * FAT volume. This field is generally only relevant for media
+ * visible on interrupt 0x13.
+ */
+ uint32_t hidddenSectors;
+ /**
+ * This field is the new 32-bit total count of sectors on the volume.
+ * This count includes the count of all sectors in all four regions
+ * of the volume. This field can be 0; if it is 0, then
+ * totalSectors16 must be non-zero.
+ */
+ uint32_t totalSectors32;
+ /**
+ * Count of sectors occupied by one FAT on FAT32 volumes.
+ */
+ uint32_t sectorsPerFat32;
+ /**
+ * This field is only defined for FAT32 media and does not exist on
+ * FAT12 and FAT16 media.
+ * Bits 0-3 -- Zero-based number of active FAT.
+ * Only valid if mirroring is disabled.
+ * Bits 4-6 -- Reserved.
+ * Bit 7 -- 0 means the FAT is mirrored at runtime into all FATs.
+ * -- 1 means only one FAT is active; it is the one referenced in bits 0-3.
+ * Bits 8-15 -- Reserved.
+ */
+ uint16_t fat32Flags;
+ /**
+ * FAT32 version. High byte is major revision number.
+ * Low byte is minor revision number. Only 0.0 define.
+ */
+ uint16_t fat32Version;
+ /**
+ * Cluster number of the first cluster of the root directory for FAT32.
+ * This usually 2 but not required to be 2.
+ */
+ uint32_t fat32RootCluster;
+ /**
+ * Sector number of FSINFO structure in the reserved area of the
+ * FAT32 volume. Usually 1.
+ */
+ uint16_t fat32FSInfo;
+ /**
+ * If non-zero, indicates the sector number in the reserved area
+ * of the volume of a copy of the boot record. Usually 6.
+ * No value other than 6 is recommended.
+ */
+ uint16_t fat32BackBootBlock;
+ /**
+ * Reserved for future expansion. Code that formats FAT32 volumes
+ * should always set all of the bytes of this field to 0.
+ */
+ uint8_t fat32Reserved[12];
+};
+/** Type name for biosParmBlock */
+typedef struct biosParmBlock bpb_t;
+//------------------------------------------------------------------------------
+/**
+ * \struct fat32BootSector
+ *
+ * \brief Boot sector for a FAT16 or FAT32 volume.
+ *
+ */
+struct fat32BootSector {
+ /** X86 jmp to boot program */
+ uint8_t jmpToBootCode[3];
+ /** informational only - don't depend on it */
+ char oemName[8];
+ /** BIOS Parameter Block */
+ bpb_t bpb;
+ /** for int0x13 use value 0X80 for hard drive */
+ uint8_t driveNumber;
+ /** used by Windows NT - should be zero for FAT */
+ uint8_t reserved1;
+ /** 0X29 if next three fields are valid */
+ uint8_t bootSignature;
+ /** usually generated by combining date and time */
+ uint32_t volumeSerialNumber;
+ /** should match volume label in root dir */
+ char volumeLabel[11];
+ /** informational only - don't depend on it */
+ char fileSystemType[8];
+ /** X86 boot code */
+ uint8_t bootCode[420];
+ /** must be 0X55 */
+ uint8_t bootSectorSig0;
+ /** must be 0XAA */
+ uint8_t bootSectorSig1;
+};
+//------------------------------------------------------------------------------
+// End Of Chain values for FAT entries
+/** FAT16 end of chain value used by Microsoft. */
+uint16_t const FAT16EOC = 0XFFFF;
+/** Minimum value for FAT16 EOC. Use to test for EOC. */
+uint16_t const FAT16EOC_MIN = 0XFFF8;
+/** FAT32 end of chain value used by Microsoft. */
+uint32_t const FAT32EOC = 0X0FFFFFFF;
+/** Minimum value for FAT32 EOC. Use to test for EOC. */
+uint32_t const FAT32EOC_MIN = 0X0FFFFFF8;
+/** Mask a for FAT32 entry. Entries are 28 bits. */
+uint32_t const FAT32MASK = 0X0FFFFFFF;
+
+/** Type name for fat32BootSector */
+typedef struct fat32BootSector fbs_t;
+//------------------------------------------------------------------------------
+/**
+ * \struct directoryEntry
+ * \brief FAT short directory entry
+ *
+ * Short means short 8.3 name, not the entry size.
+ *
+ * Date Format. A FAT directory entry date stamp is a 16-bit field that is
+ * basically a date relative to the MS-DOS epoch of 01/01/1980. Here is the
+ * format (bit 0 is the LSB of the 16-bit word, bit 15 is the MSB of the
+ * 16-bit word):
+ *
+ * Bits 9-15: Count of years from 1980, valid value range 0-127
+ * inclusive (1980-2107).
+ *
+ * Bits 5-8: Month of year, 1 = January, valid value range 1-12 inclusive.
+ *
+ * Bits 0-4: Day of month, valid value range 1-31 inclusive.
+ *
+ * Time Format. A FAT directory entry time stamp is a 16-bit field that has
+ * a granularity of 2 seconds. Here is the format (bit 0 is the LSB of the
+ * 16-bit word, bit 15 is the MSB of the 16-bit word).
+ *
+ * Bits 11-15: Hours, valid value range 0-23 inclusive.
+ *
+ * Bits 5-10: Minutes, valid value range 0-59 inclusive.
+ *
+ * Bits 0-4: 2-second count, valid value range 0-29 inclusive (0 - 58 seconds).
+ *
+ * The valid time range is from Midnight 00:00:00 to 23:59:58.
+ */
+struct directoryEntry {
+ /**
+ * Short 8.3 name.
+ * The first eight bytes contain the file name with blank fill.
+ * The last three bytes contain the file extension with blank fill.
+ */
+ uint8_t name[11];
+ /** Entry attributes.
+ *
+ * The upper two bits of the attribute byte are reserved and should
+ * always be set to 0 when a file is created and never modified or
+ * looked at after that. See defines that begin with DIR_ATT_.
+ */
+ uint8_t attributes;
+ /**
+ * Reserved for use by Windows NT. Set value to 0 when a file is
+ * created and never modify or look at it after that.
+ */
+ uint8_t reservedNT;
+ /**
+ * The granularity of the seconds part of creationTime is 2 seconds
+ * so this field is a count of tenths of a second and its valid
+ * value range is 0-199 inclusive. (WHG note - seems to be hundredths)
+ */
+ uint8_t creationTimeTenths;
+ /** Time file was created. */
+ uint16_t creationTime;
+ /** Date file was created. */
+ uint16_t creationDate;
+ /**
+ * Last access date. Note that there is no last access time, only
+ * a date. This is the date of last read or write. In the case of
+ * a write, this should be set to the same date as lastWriteDate.
+ */
+ uint16_t lastAccessDate;
+ /**
+ * High word of this entry's first cluster number (always 0 for a
+ * FAT12 or FAT16 volume).
+ */
+ uint16_t firstClusterHigh;
+ /** Time of last write. File creation is considered a write. */
+ uint16_t lastWriteTime;
+ /** Date of last write. File creation is considered a write. */
+ uint16_t lastWriteDate;
+ /** Low word of this entry's first cluster number. */
+ uint16_t firstClusterLow;
+ /** 32-bit unsigned holding this file's size in bytes. */
+ uint32_t fileSize;
+};
+//------------------------------------------------------------------------------
+// Definitions for directory entries
+//
+/** Type name for directoryEntry */
+typedef struct directoryEntry dir_t;
+/** escape for name[0] = 0XE5 */
+uint8_t const DIR_NAME_0XE5 = 0X05;
+/** name[0] value for entry that is free after being "deleted" */
+uint8_t const DIR_NAME_DELETED = 0XE5;
+/** name[0] value for entry that is free and no allocated entries follow */
+uint8_t const DIR_NAME_FREE = 0X00;
+/** file is read-only */
+uint8_t const DIR_ATT_READ_ONLY = 0X01;
+/** File should hidden in directory listings */
+uint8_t const DIR_ATT_HIDDEN = 0X02;
+/** Entry is for a system file */
+uint8_t const DIR_ATT_SYSTEM = 0X04;
+/** Directory entry contains the volume label */
+uint8_t const DIR_ATT_VOLUME_ID = 0X08;
+/** Entry is for a directory */
+uint8_t const DIR_ATT_DIRECTORY = 0X10;
+/** Old DOS archive bit for backup support */
+uint8_t const DIR_ATT_ARCHIVE = 0X20;
+/** Test value for long name entry. Test is
+ (d->attributes & DIR_ATT_LONG_NAME_MASK) == DIR_ATT_LONG_NAME. */
+uint8_t const DIR_ATT_LONG_NAME = 0X0F;
+/** Test mask for long name entry */
+uint8_t const DIR_ATT_LONG_NAME_MASK = 0X3F;
+/** defined attribute bits */
+uint8_t const DIR_ATT_DEFINED_BITS = 0X3F;
+/** Directory entry is part of a long name */
+static inline uint8_t DIR_IS_LONG_NAME(const dir_t* dir) {
+ return (dir->attributes & DIR_ATT_LONG_NAME_MASK) == DIR_ATT_LONG_NAME;
+}
+/** Mask for file/subdirectory tests */
+uint8_t const DIR_ATT_FILE_TYPE_MASK = (DIR_ATT_VOLUME_ID | DIR_ATT_DIRECTORY);
+/** Directory entry is for a file */
+static inline uint8_t DIR_IS_FILE(const dir_t* dir) {
+ return (dir->attributes & DIR_ATT_FILE_TYPE_MASK) == 0;
+}
+/** Directory entry is for a subdirectory */
+static inline uint8_t DIR_IS_SUBDIR(const dir_t* dir) {
+ return (dir->attributes & DIR_ATT_FILE_TYPE_MASK) == DIR_ATT_DIRECTORY;
+}
+/** Directory entry is for a file or subdirectory */
+static inline uint8_t DIR_IS_FILE_OR_SUBDIR(const dir_t* dir) {
+ return (dir->attributes & DIR_ATT_VOLUME_ID) == 0;
+}
+#endif // FatStructs_h
diff --git a/libraries/SD/utility/Sd2Card.cpp b/libraries/SD/utility/Sd2Card.cpp new file mode 100644 index 0000000..361cd0a --- /dev/null +++ b/libraries/SD/utility/Sd2Card.cpp @@ -0,0 +1,644 @@ +/* Arduino Sd2Card Library
+ * Copyright (C) 2009 by William Greiman
+ *
+ * This file is part of the Arduino Sd2Card Library
+ *
+ * This Library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This Library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the Arduino Sd2Card Library. If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+#include <Arduino.h>
+#include "Sd2Card.h"
+//------------------------------------------------------------------------------
+#ifndef SOFTWARE_SPI
+// functions for hardware SPI
+/** Send a byte to the card */
+static void spiSend(uint8_t b) {
+ SPDR = b;
+ while (!(SPSR & (1 << SPIF)));
+}
+/** Receive a byte from the card */
+static uint8_t spiRec(void) {
+ spiSend(0XFF);
+ return SPDR;
+}
+#else // SOFTWARE_SPI
+//------------------------------------------------------------------------------
+/** nop to tune soft SPI timing */
+#define nop asm volatile ("nop\n\t")
+//------------------------------------------------------------------------------
+/** Soft SPI receive */
+uint8_t spiRec(void) {
+ uint8_t data = 0;
+ // no interrupts during byte receive - about 8 us
+ cli();
+ // output pin high - like sending 0XFF
+ fastDigitalWrite(SPI_MOSI_PIN, HIGH);
+
+ for (uint8_t i = 0; i < 8; i++) {
+ fastDigitalWrite(SPI_SCK_PIN, HIGH);
+
+ // adjust so SCK is nice
+ nop;
+ nop;
+
+ data <<= 1;
+
+ if (fastDigitalRead(SPI_MISO_PIN)) data |= 1;
+
+ fastDigitalWrite(SPI_SCK_PIN, LOW);
+ }
+ // enable interrupts
+ sei();
+ return data;
+}
+//------------------------------------------------------------------------------
+/** Soft SPI send */
+void spiSend(uint8_t data) {
+ // no interrupts during byte send - about 8 us
+ cli();
+ for (uint8_t i = 0; i < 8; i++) {
+ fastDigitalWrite(SPI_SCK_PIN, LOW);
+
+ fastDigitalWrite(SPI_MOSI_PIN, data & 0X80);
+
+ data <<= 1;
+
+ fastDigitalWrite(SPI_SCK_PIN, HIGH);
+ }
+ // hold SCK high for a few ns
+ nop;
+ nop;
+ nop;
+ nop;
+
+ fastDigitalWrite(SPI_SCK_PIN, LOW);
+ // enable interrupts
+ sei();
+}
+#endif // SOFTWARE_SPI
+//------------------------------------------------------------------------------
+// send command and return error code. Return zero for OK
+uint8_t Sd2Card::cardCommand(uint8_t cmd, uint32_t arg) {
+ // end read if in partialBlockRead mode
+ readEnd();
+
+ // select card
+ chipSelectLow();
+
+ // wait up to 300 ms if busy
+ waitNotBusy(300);
+
+ // send command
+ spiSend(cmd | 0x40);
+
+ // send argument
+ for (int8_t s = 24; s >= 0; s -= 8) spiSend(arg >> s);
+
+ // send CRC
+ uint8_t crc = 0XFF;
+ if (cmd == CMD0) crc = 0X95; // correct crc for CMD0 with arg 0
+ if (cmd == CMD8) crc = 0X87; // correct crc for CMD8 with arg 0X1AA
+ spiSend(crc);
+
+ // wait for response
+ for (uint8_t i = 0; ((status_ = spiRec()) & 0X80) && i != 0XFF; i++);
+ return status_;
+}
+//------------------------------------------------------------------------------
+/**
+ * Determine the size of an SD flash memory card.
+ *
+ * \return The number of 512 byte data blocks in the card
+ * or zero if an error occurs.
+ */
+uint32_t Sd2Card::cardSize(void) {
+ csd_t csd;
+ if (!readCSD(&csd)) return 0;
+ if (csd.v1.csd_ver == 0) {
+ uint8_t read_bl_len = csd.v1.read_bl_len;
+ uint16_t c_size = (csd.v1.c_size_high << 10)
+ | (csd.v1.c_size_mid << 2) | csd.v1.c_size_low;
+ uint8_t c_size_mult = (csd.v1.c_size_mult_high << 1)
+ | csd.v1.c_size_mult_low;
+ return (uint32_t)(c_size + 1) << (c_size_mult + read_bl_len - 7);
+ } else if (csd.v2.csd_ver == 1) {
+ uint32_t c_size = ((uint32_t)csd.v2.c_size_high << 16)
+ | (csd.v2.c_size_mid << 8) | csd.v2.c_size_low;
+ return (c_size + 1) << 10;
+ } else {
+ error(SD_CARD_ERROR_BAD_CSD);
+ return 0;
+ }
+}
+//------------------------------------------------------------------------------
+void Sd2Card::chipSelectHigh(void) {
+ digitalWrite(chipSelectPin_, HIGH);
+}
+//------------------------------------------------------------------------------
+void Sd2Card::chipSelectLow(void) {
+ digitalWrite(chipSelectPin_, LOW);
+}
+//------------------------------------------------------------------------------
+/** Erase a range of blocks.
+ *
+ * \param[in] firstBlock The address of the first block in the range.
+ * \param[in] lastBlock The address of the last block in the range.
+ *
+ * \note This function requests the SD card to do a flash erase for a
+ * range of blocks. The data on the card after an erase operation is
+ * either 0 or 1, depends on the card vendor. The card must support
+ * single block erase.
+ *
+ * \return The value one, true, is returned for success and
+ * the value zero, false, is returned for failure.
+ */
+uint8_t Sd2Card::erase(uint32_t firstBlock, uint32_t lastBlock) {
+ if (!eraseSingleBlockEnable()) {
+ error(SD_CARD_ERROR_ERASE_SINGLE_BLOCK);
+ goto fail;
+ }
+ if (type_ != SD_CARD_TYPE_SDHC) {
+ firstBlock <<= 9;
+ lastBlock <<= 9;
+ }
+ if (cardCommand(CMD32, firstBlock)
+ || cardCommand(CMD33, lastBlock)
+ || cardCommand(CMD38, 0)) {
+ error(SD_CARD_ERROR_ERASE);
+ goto fail;
+ }
+ if (!waitNotBusy(SD_ERASE_TIMEOUT)) {
+ error(SD_CARD_ERROR_ERASE_TIMEOUT);
+ goto fail;
+ }
+ chipSelectHigh();
+ return true;
+
+ fail:
+ chipSelectHigh();
+ return false;
+}
+//------------------------------------------------------------------------------
+/** Determine if card supports single block erase.
+ *
+ * \return The value one, true, is returned if single block erase is supported.
+ * The value zero, false, is returned if single block erase is not supported.
+ */
+uint8_t Sd2Card::eraseSingleBlockEnable(void) {
+ csd_t csd;
+ return readCSD(&csd) ? csd.v1.erase_blk_en : 0;
+}
+//------------------------------------------------------------------------------
+/**
+ * Initialize an SD flash memory card.
+ *
+ * \param[in] sckRateID SPI clock rate selector. See setSckRate().
+ * \param[in] chipSelectPin SD chip select pin number.
+ *
+ * \return The value one, true, is returned for success and
+ * the value zero, false, is returned for failure. The reason for failure
+ * can be determined by calling errorCode() and errorData().
+ */
+uint8_t Sd2Card::init(uint8_t sckRateID, uint8_t chipSelectPin) {
+ errorCode_ = inBlock_ = partialBlockRead_ = type_ = 0;
+ chipSelectPin_ = chipSelectPin;
+ // 16-bit init start time allows over a minute
+ uint16_t t0 = (uint16_t)millis();
+ uint32_t arg;
+
+ // set pin modes
+ pinMode(chipSelectPin_, OUTPUT);
+ chipSelectHigh();
+ pinMode(SPI_MISO_PIN, INPUT);
+ pinMode(SPI_MOSI_PIN, OUTPUT);
+ pinMode(SPI_SCK_PIN, OUTPUT);
+
+#ifndef SOFTWARE_SPI
+ // SS must be in output mode even it is not chip select
+ pinMode(SS_PIN, OUTPUT);
+ digitalWrite(SS_PIN, HIGH); // disable any SPI device using hardware SS pin
+ // Enable SPI, Master, clock rate f_osc/128
+ SPCR = (1 << SPE) | (1 << MSTR) | (1 << SPR1) | (1 << SPR0);
+ // clear double speed
+ SPSR &= ~(1 << SPI2X);
+#endif // SOFTWARE_SPI
+
+ // must supply min of 74 clock cycles with CS high.
+ for (uint8_t i = 0; i < 10; i++) spiSend(0XFF);
+
+ chipSelectLow();
+
+ // command to go idle in SPI mode
+ while ((status_ = cardCommand(CMD0, 0)) != R1_IDLE_STATE) {
+ if (((uint16_t)millis() - t0) > SD_INIT_TIMEOUT) {
+ error(SD_CARD_ERROR_CMD0);
+ goto fail;
+ }
+ }
+ // check SD version
+ if ((cardCommand(CMD8, 0x1AA) & R1_ILLEGAL_COMMAND)) {
+ type(SD_CARD_TYPE_SD1);
+ } else {
+ // only need last byte of r7 response
+ for (uint8_t i = 0; i < 4; i++) status_ = spiRec();
+ if (status_ != 0XAA) {
+ error(SD_CARD_ERROR_CMD8);
+ goto fail;
+ }
+ type(SD_CARD_TYPE_SD2);
+ }
+ // initialize card and send host supports SDHC if SD2
+ arg = type() == SD_CARD_TYPE_SD2 ? 0X40000000 : 0;
+
+ while ((status_ = cardAcmd(ACMD41, arg)) != R1_READY_STATE) {
+ // check for timeout
+ if (((uint16_t)millis() - t0) > SD_INIT_TIMEOUT) {
+ error(SD_CARD_ERROR_ACMD41);
+ goto fail;
+ }
+ }
+ // if SD2 read OCR register to check for SDHC card
+ if (type() == SD_CARD_TYPE_SD2) {
+ if (cardCommand(CMD58, 0)) {
+ error(SD_CARD_ERROR_CMD58);
+ goto fail;
+ }
+ if ((spiRec() & 0XC0) == 0XC0) type(SD_CARD_TYPE_SDHC);
+ // discard rest of ocr - contains allowed voltage range
+ for (uint8_t i = 0; i < 3; i++) spiRec();
+ }
+ chipSelectHigh();
+
+#ifndef SOFTWARE_SPI
+ return setSckRate(sckRateID);
+#else // SOFTWARE_SPI
+ return true;
+#endif // SOFTWARE_SPI
+
+ fail:
+ chipSelectHigh();
+ return false;
+}
+//------------------------------------------------------------------------------
+/**
+ * Enable or disable partial block reads.
+ *
+ * Enabling partial block reads improves performance by allowing a block
+ * to be read over the SPI bus as several sub-blocks. Errors may occur
+ * if the time between reads is too long since the SD card may timeout.
+ * The SPI SS line will be held low until the entire block is read or
+ * readEnd() is called.
+ *
+ * Use this for applications like the Adafruit Wave Shield.
+ *
+ * \param[in] value The value TRUE (non-zero) or FALSE (zero).)
+ */
+void Sd2Card::partialBlockRead(uint8_t value) {
+ readEnd();
+ partialBlockRead_ = value;
+}
+//------------------------------------------------------------------------------
+/**
+ * Read a 512 byte block from an SD card device.
+ *
+ * \param[in] block Logical block to be read.
+ * \param[out] dst Pointer to the location that will receive the data.
+
+ * \return The value one, true, is returned for success and
+ * the value zero, false, is returned for failure.
+ */
+uint8_t Sd2Card::readBlock(uint32_t block, uint8_t* dst) {
+ return readData(block, 0, 512, dst);
+}
+//------------------------------------------------------------------------------
+/**
+ * Read part of a 512 byte block from an SD card.
+ *
+ * \param[in] block Logical block to be read.
+ * \param[in] offset Number of bytes to skip at start of block
+ * \param[out] dst Pointer to the location that will receive the data.
+ * \param[in] count Number of bytes to read
+ * \return The value one, true, is returned for success and
+ * the value zero, false, is returned for failure.
+ */
+uint8_t Sd2Card::readData(uint32_t block,
+ uint16_t offset, uint16_t count, uint8_t* dst) {
+ uint16_t n;
+ if (count == 0) return true;
+ if ((count + offset) > 512) {
+ goto fail;
+ }
+ if (!inBlock_ || block != block_ || offset < offset_) {
+ block_ = block;
+ // use address if not SDHC card
+ if (type()!= SD_CARD_TYPE_SDHC) block <<= 9;
+ if (cardCommand(CMD17, block)) {
+ error(SD_CARD_ERROR_CMD17);
+ goto fail;
+ }
+ if (!waitStartBlock()) {
+ goto fail;
+ }
+ offset_ = 0;
+ inBlock_ = 1;
+ }
+
+#ifdef OPTIMIZE_HARDWARE_SPI
+ // start first spi transfer
+ SPDR = 0XFF;
+
+ // skip data before offset
+ for (;offset_ < offset; offset_++) {
+ while (!(SPSR & (1 << SPIF)));
+ SPDR = 0XFF;
+ }
+ // transfer data
+ n = count - 1;
+ for (uint16_t i = 0; i < n; i++) {
+ while (!(SPSR & (1 << SPIF)));
+ dst[i] = SPDR;
+ SPDR = 0XFF;
+ }
+ // wait for last byte
+ while (!(SPSR & (1 << SPIF)));
+ dst[n] = SPDR;
+
+#else // OPTIMIZE_HARDWARE_SPI
+
+ // skip data before offset
+ for (;offset_ < offset; offset_++) {
+ spiRec();
+ }
+ // transfer data
+ for (uint16_t i = 0; i < count; i++) {
+ dst[i] = spiRec();
+ }
+#endif // OPTIMIZE_HARDWARE_SPI
+
+ offset_ += count;
+ if (!partialBlockRead_ || offset_ >= 512) {
+ // read rest of data, checksum and set chip select high
+ readEnd();
+ }
+ return true;
+
+ fail:
+ chipSelectHigh();
+ return false;
+}
+//------------------------------------------------------------------------------
+/** Skip remaining data in a block when in partial block read mode. */
+void Sd2Card::readEnd(void) {
+ if (inBlock_) {
+ // skip data and crc
+#ifdef OPTIMIZE_HARDWARE_SPI
+ // optimize skip for hardware
+ SPDR = 0XFF;
+ while (offset_++ < 513) {
+ while (!(SPSR & (1 << SPIF)));
+ SPDR = 0XFF;
+ }
+ // wait for last crc byte
+ while (!(SPSR & (1 << SPIF)));
+#else // OPTIMIZE_HARDWARE_SPI
+ while (offset_++ < 514) spiRec();
+#endif // OPTIMIZE_HARDWARE_SPI
+ chipSelectHigh();
+ inBlock_ = 0;
+ }
+}
+//------------------------------------------------------------------------------
+/** read CID or CSR register */
+uint8_t Sd2Card::readRegister(uint8_t cmd, void* buf) {
+ uint8_t* dst = reinterpret_cast<uint8_t*>(buf);
+ if (cardCommand(cmd, 0)) {
+ error(SD_CARD_ERROR_READ_REG);
+ goto fail;
+ }
+ if (!waitStartBlock()) goto fail;
+ // transfer data
+ for (uint16_t i = 0; i < 16; i++) dst[i] = spiRec();
+ spiRec(); // get first crc byte
+ spiRec(); // get second crc byte
+ chipSelectHigh();
+ return true;
+
+ fail:
+ chipSelectHigh();
+ return false;
+}
+//------------------------------------------------------------------------------
+/**
+ * Set the SPI clock rate.
+ *
+ * \param[in] sckRateID A value in the range [0, 6].
+ *
+ * The SPI clock will be set to F_CPU/pow(2, 1 + sckRateID). The maximum
+ * SPI rate is F_CPU/2 for \a sckRateID = 0 and the minimum rate is F_CPU/128
+ * for \a scsRateID = 6.
+ *
+ * \return The value one, true, is returned for success and the value zero,
+ * false, is returned for an invalid value of \a sckRateID.
+ */
+uint8_t Sd2Card::setSckRate(uint8_t sckRateID) {
+ if (sckRateID > 6) {
+ error(SD_CARD_ERROR_SCK_RATE);
+ return false;
+ }
+ // see avr processor datasheet for SPI register bit definitions
+ if ((sckRateID & 1) || sckRateID == 6) {
+ SPSR &= ~(1 << SPI2X);
+ } else {
+ SPSR |= (1 << SPI2X);
+ }
+ SPCR &= ~((1 <<SPR1) | (1 << SPR0));
+ SPCR |= (sckRateID & 4 ? (1 << SPR1) : 0)
+ | (sckRateID & 2 ? (1 << SPR0) : 0);
+ return true;
+}
+//------------------------------------------------------------------------------
+// wait for card to go not busy
+uint8_t Sd2Card::waitNotBusy(uint16_t timeoutMillis) {
+ uint16_t t0 = millis();
+ do {
+ if (spiRec() == 0XFF) return true;
+ }
+ while (((uint16_t)millis() - t0) < timeoutMillis);
+ return false;
+}
+//------------------------------------------------------------------------------
+/** Wait for start block token */
+uint8_t Sd2Card::waitStartBlock(void) {
+ uint16_t t0 = millis();
+ while ((status_ = spiRec()) == 0XFF) {
+ if (((uint16_t)millis() - t0) > SD_READ_TIMEOUT) {
+ error(SD_CARD_ERROR_READ_TIMEOUT);
+ goto fail;
+ }
+ }
+ if (status_ != DATA_START_BLOCK) {
+ error(SD_CARD_ERROR_READ);
+ goto fail;
+ }
+ return true;
+
+ fail:
+ chipSelectHigh();
+ return false;
+}
+//------------------------------------------------------------------------------
+/**
+ * Writes a 512 byte block to an SD card.
+ *
+ * \param[in] blockNumber Logical block to be written.
+ * \param[in] src Pointer to the location of the data to be written.
+ * \return The value one, true, is returned for success and
+ * the value zero, false, is returned for failure.
+ */
+uint8_t Sd2Card::writeBlock(uint32_t blockNumber, const uint8_t* src) {
+#if SD_PROTECT_BLOCK_ZERO
+ // don't allow write to first block
+ if (blockNumber == 0) {
+ error(SD_CARD_ERROR_WRITE_BLOCK_ZERO);
+ goto fail;
+ }
+#endif // SD_PROTECT_BLOCK_ZERO
+
+ // use address if not SDHC card
+ if (type() != SD_CARD_TYPE_SDHC) blockNumber <<= 9;
+ if (cardCommand(CMD24, blockNumber)) {
+ error(SD_CARD_ERROR_CMD24);
+ goto fail;
+ }
+ if (!writeData(DATA_START_BLOCK, src)) goto fail;
+
+ // wait for flash programming to complete
+ if (!waitNotBusy(SD_WRITE_TIMEOUT)) {
+ error(SD_CARD_ERROR_WRITE_TIMEOUT);
+ goto fail;
+ }
+ // response is r2 so get and check two bytes for nonzero
+ if (cardCommand(CMD13, 0) || spiRec()) {
+ error(SD_CARD_ERROR_WRITE_PROGRAMMING);
+ goto fail;
+ }
+ chipSelectHigh();
+ return true;
+
+ fail:
+ chipSelectHigh();
+ return false;
+}
+//------------------------------------------------------------------------------
+/** Write one data block in a multiple block write sequence */
+uint8_t Sd2Card::writeData(const uint8_t* src) {
+ // wait for previous write to finish
+ if (!waitNotBusy(SD_WRITE_TIMEOUT)) {
+ error(SD_CARD_ERROR_WRITE_MULTIPLE);
+ chipSelectHigh();
+ return false;
+ }
+ return writeData(WRITE_MULTIPLE_TOKEN, src);
+}
+//------------------------------------------------------------------------------
+// send one block of data for write block or write multiple blocks
+uint8_t Sd2Card::writeData(uint8_t token, const uint8_t* src) {
+#ifdef OPTIMIZE_HARDWARE_SPI
+
+ // send data - optimized loop
+ SPDR = token;
+
+ // send two byte per iteration
+ for (uint16_t i = 0; i < 512; i += 2) {
+ while (!(SPSR & (1 << SPIF)));
+ SPDR = src[i];
+ while (!(SPSR & (1 << SPIF)));
+ SPDR = src[i+1];
+ }
+
+ // wait for last data byte
+ while (!(SPSR & (1 << SPIF)));
+
+#else // OPTIMIZE_HARDWARE_SPI
+ spiSend(token);
+ for (uint16_t i = 0; i < 512; i++) {
+ spiSend(src[i]);
+ }
+#endif // OPTIMIZE_HARDWARE_SPI
+ spiSend(0xff); // dummy crc
+ spiSend(0xff); // dummy crc
+
+ status_ = spiRec();
+ if ((status_ & DATA_RES_MASK) != DATA_RES_ACCEPTED) {
+ error(SD_CARD_ERROR_WRITE);
+ chipSelectHigh();
+ return false;
+ }
+ return true;
+}
+//------------------------------------------------------------------------------
+/** Start a write multiple blocks sequence.
+ *
+ * \param[in] blockNumber Address of first block in sequence.
+ * \param[in] eraseCount The number of blocks to be pre-erased.
+ *
+ * \note This function is used with writeData() and writeStop()
+ * for optimized multiple block writes.
+ *
+ * \return The value one, true, is returned for success and
+ * the value zero, false, is returned for failure.
+ */
+uint8_t Sd2Card::writeStart(uint32_t blockNumber, uint32_t eraseCount) {
+#if SD_PROTECT_BLOCK_ZERO
+ // don't allow write to first block
+ if (blockNumber == 0) {
+ error(SD_CARD_ERROR_WRITE_BLOCK_ZERO);
+ goto fail;
+ }
+#endif // SD_PROTECT_BLOCK_ZERO
+ // send pre-erase count
+ if (cardAcmd(ACMD23, eraseCount)) {
+ error(SD_CARD_ERROR_ACMD23);
+ goto fail;
+ }
+ // use address if not SDHC card
+ if (type() != SD_CARD_TYPE_SDHC) blockNumber <<= 9;
+ if (cardCommand(CMD25, blockNumber)) {
+ error(SD_CARD_ERROR_CMD25);
+ goto fail;
+ }
+ return true;
+
+ fail:
+ chipSelectHigh();
+ return false;
+}
+//------------------------------------------------------------------------------
+/** End a write multiple blocks sequence.
+ *
+* \return The value one, true, is returned for success and
+ * the value zero, false, is returned for failure.
+ */
+uint8_t Sd2Card::writeStop(void) {
+ if (!waitNotBusy(SD_WRITE_TIMEOUT)) goto fail;
+ spiSend(STOP_TRAN_TOKEN);
+ if (!waitNotBusy(SD_WRITE_TIMEOUT)) goto fail;
+ chipSelectHigh();
+ return true;
+
+ fail:
+ error(SD_CARD_ERROR_STOP_TRAN);
+ chipSelectHigh();
+ return false;
+}
diff --git a/libraries/SD/utility/Sd2Card.h b/libraries/SD/utility/Sd2Card.h new file mode 100644 index 0000000..73b46fb --- /dev/null +++ b/libraries/SD/utility/Sd2Card.h @@ -0,0 +1,233 @@ +/* Arduino Sd2Card Library
+ * Copyright (C) 2009 by William Greiman
+ *
+ * This file is part of the Arduino Sd2Card Library
+ *
+ * This Library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This Library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the Arduino Sd2Card Library. If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+#ifndef Sd2Card_h
+#define Sd2Card_h
+/**
+ * \file
+ * Sd2Card class
+ */
+#include "Sd2PinMap.h"
+#include "SdInfo.h"
+/** Set SCK to max rate of F_CPU/2. See Sd2Card::setSckRate(). */
+uint8_t const SPI_FULL_SPEED = 0;
+/** Set SCK rate to F_CPU/4. See Sd2Card::setSckRate(). */
+uint8_t const SPI_HALF_SPEED = 1;
+/** Set SCK rate to F_CPU/8. Sd2Card::setSckRate(). */
+uint8_t const SPI_QUARTER_SPEED = 2;
+/**
+ * Define MEGA_SOFT_SPI non-zero to use software SPI on Mega Arduinos.
+ * Pins used are SS 10, MOSI 11, MISO 12, and SCK 13.
+ *
+ * MEGA_SOFT_SPI allows an unmodified Adafruit GPS Shield to be used
+ * on Mega Arduinos. Software SPI works well with GPS Shield V1.1
+ * but many SD cards will fail with GPS Shield V1.0.
+ */
+#define MEGA_SOFT_SPI 0
+//------------------------------------------------------------------------------
+#if MEGA_SOFT_SPI && (defined(__AVR_ATmega1280__)||defined(__AVR_ATmega2560__))
+#define SOFTWARE_SPI
+#endif // MEGA_SOFT_SPI
+//------------------------------------------------------------------------------
+// SPI pin definitions
+//
+#ifndef SOFTWARE_SPI
+// hardware pin defs
+/**
+ * SD Chip Select pin
+ *
+ * Warning if this pin is redefined the hardware SS will pin will be enabled
+ * as an output by init(). An avr processor will not function as an SPI
+ * master unless SS is set to output mode.
+ */
+/** The default chip select pin for the SD card is SS. */
+uint8_t const SD_CHIP_SELECT_PIN = SS_PIN;
+// The following three pins must not be redefined for hardware SPI.
+/** SPI Master Out Slave In pin */
+uint8_t const SPI_MOSI_PIN = MOSI_PIN;
+/** SPI Master In Slave Out pin */
+uint8_t const SPI_MISO_PIN = MISO_PIN;
+/** SPI Clock pin */
+uint8_t const SPI_SCK_PIN = SCK_PIN;
+/** optimize loops for hardware SPI */
+#define OPTIMIZE_HARDWARE_SPI
+
+#else // SOFTWARE_SPI
+// define software SPI pins so Mega can use unmodified GPS Shield
+/** SPI chip select pin */
+uint8_t const SD_CHIP_SELECT_PIN = 10;
+/** SPI Master Out Slave In pin */
+uint8_t const SPI_MOSI_PIN = 11;
+/** SPI Master In Slave Out pin */
+uint8_t const SPI_MISO_PIN = 12;
+/** SPI Clock pin */
+uint8_t const SPI_SCK_PIN = 13;
+#endif // SOFTWARE_SPI
+//------------------------------------------------------------------------------
+/** Protect block zero from write if nonzero */
+#define SD_PROTECT_BLOCK_ZERO 1
+/** init timeout ms */
+uint16_t const SD_INIT_TIMEOUT = 2000;
+/** erase timeout ms */
+uint16_t const SD_ERASE_TIMEOUT = 10000;
+/** read timeout ms */
+uint16_t const SD_READ_TIMEOUT = 300;
+/** write time out ms */
+uint16_t const SD_WRITE_TIMEOUT = 600;
+//------------------------------------------------------------------------------
+// SD card errors
+/** timeout error for command CMD0 */
+uint8_t const SD_CARD_ERROR_CMD0 = 0X1;
+/** CMD8 was not accepted - not a valid SD card*/
+uint8_t const SD_CARD_ERROR_CMD8 = 0X2;
+/** card returned an error response for CMD17 (read block) */
+uint8_t const SD_CARD_ERROR_CMD17 = 0X3;
+/** card returned an error response for CMD24 (write block) */
+uint8_t const SD_CARD_ERROR_CMD24 = 0X4;
+/** WRITE_MULTIPLE_BLOCKS command failed */
+uint8_t const SD_CARD_ERROR_CMD25 = 0X05;
+/** card returned an error response for CMD58 (read OCR) */
+uint8_t const SD_CARD_ERROR_CMD58 = 0X06;
+/** SET_WR_BLK_ERASE_COUNT failed */
+uint8_t const SD_CARD_ERROR_ACMD23 = 0X07;
+/** card's ACMD41 initialization process timeout */
+uint8_t const SD_CARD_ERROR_ACMD41 = 0X08;
+/** card returned a bad CSR version field */
+uint8_t const SD_CARD_ERROR_BAD_CSD = 0X09;
+/** erase block group command failed */
+uint8_t const SD_CARD_ERROR_ERASE = 0X0A;
+/** card not capable of single block erase */
+uint8_t const SD_CARD_ERROR_ERASE_SINGLE_BLOCK = 0X0B;
+/** Erase sequence timed out */
+uint8_t const SD_CARD_ERROR_ERASE_TIMEOUT = 0X0C;
+/** card returned an error token instead of read data */
+uint8_t const SD_CARD_ERROR_READ = 0X0D;
+/** read CID or CSD failed */
+uint8_t const SD_CARD_ERROR_READ_REG = 0X0E;
+/** timeout while waiting for start of read data */
+uint8_t const SD_CARD_ERROR_READ_TIMEOUT = 0X0F;
+/** card did not accept STOP_TRAN_TOKEN */
+uint8_t const SD_CARD_ERROR_STOP_TRAN = 0X10;
+/** card returned an error token as a response to a write operation */
+uint8_t const SD_CARD_ERROR_WRITE = 0X11;
+/** attempt to write protected block zero */
+uint8_t const SD_CARD_ERROR_WRITE_BLOCK_ZERO = 0X12;
+/** card did not go ready for a multiple block write */
+uint8_t const SD_CARD_ERROR_WRITE_MULTIPLE = 0X13;
+/** card returned an error to a CMD13 status check after a write */
+uint8_t const SD_CARD_ERROR_WRITE_PROGRAMMING = 0X14;
+/** timeout occurred during write programming */
+uint8_t const SD_CARD_ERROR_WRITE_TIMEOUT = 0X15;
+/** incorrect rate selected */
+uint8_t const SD_CARD_ERROR_SCK_RATE = 0X16;
+//------------------------------------------------------------------------------
+// card types
+/** Standard capacity V1 SD card */
+uint8_t const SD_CARD_TYPE_SD1 = 1;
+/** Standard capacity V2 SD card */
+uint8_t const SD_CARD_TYPE_SD2 = 2;
+/** High Capacity SD card */
+uint8_t const SD_CARD_TYPE_SDHC = 3;
+//------------------------------------------------------------------------------
+/**
+ * \class Sd2Card
+ * \brief Raw access to SD and SDHC flash memory cards.
+ */
+class Sd2Card {
+ public:
+ /** Construct an instance of Sd2Card. */
+ Sd2Card(void) : errorCode_(0), inBlock_(0), partialBlockRead_(0), type_(0) {}
+ uint32_t cardSize(void);
+ uint8_t erase(uint32_t firstBlock, uint32_t lastBlock);
+ uint8_t eraseSingleBlockEnable(void);
+ /**
+ * \return error code for last error. See Sd2Card.h for a list of error codes.
+ */
+ uint8_t errorCode(void) const {return errorCode_;}
+ /** \return error data for last error. */
+ uint8_t errorData(void) const {return status_;}
+ /**
+ * Initialize an SD flash memory card with default clock rate and chip
+ * select pin. See sd2Card::init(uint8_t sckRateID, uint8_t chipSelectPin).
+ */
+ uint8_t init(void) {
+ return init(SPI_FULL_SPEED, SD_CHIP_SELECT_PIN);
+ }
+ /**
+ * Initialize an SD flash memory card with the selected SPI clock rate
+ * and the default SD chip select pin.
+ * See sd2Card::init(uint8_t sckRateID, uint8_t chipSelectPin).
+ */
+ uint8_t init(uint8_t sckRateID) {
+ return init(sckRateID, SD_CHIP_SELECT_PIN);
+ }
+ uint8_t init(uint8_t sckRateID, uint8_t chipSelectPin);
+ void partialBlockRead(uint8_t value);
+ /** Returns the current value, true or false, for partial block read. */
+ uint8_t partialBlockRead(void) const {return partialBlockRead_;}
+ uint8_t readBlock(uint32_t block, uint8_t* dst);
+ uint8_t readData(uint32_t block,
+ uint16_t offset, uint16_t count, uint8_t* dst);
+ /**
+ * Read a cards CID register. The CID contains card identification
+ * information such as Manufacturer ID, Product name, Product serial
+ * number and Manufacturing date. */
+ uint8_t readCID(cid_t* cid) {
+ return readRegister(CMD10, cid);
+ }
+ /**
+ * Read a cards CSD register. The CSD contains Card-Specific Data that
+ * provides information regarding access to the card's contents. */
+ uint8_t readCSD(csd_t* csd) {
+ return readRegister(CMD9, csd);
+ }
+ void readEnd(void);
+ uint8_t setSckRate(uint8_t sckRateID);
+ /** Return the card type: SD V1, SD V2 or SDHC */
+ uint8_t type(void) const {return type_;}
+ uint8_t writeBlock(uint32_t blockNumber, const uint8_t* src);
+ uint8_t writeData(const uint8_t* src);
+ uint8_t writeStart(uint32_t blockNumber, uint32_t eraseCount);
+ uint8_t writeStop(void);
+ private:
+ uint32_t block_;
+ uint8_t chipSelectPin_;
+ uint8_t errorCode_;
+ uint8_t inBlock_;
+ uint16_t offset_;
+ uint8_t partialBlockRead_;
+ uint8_t status_;
+ uint8_t type_;
+ // private functions
+ uint8_t cardAcmd(uint8_t cmd, uint32_t arg) {
+ cardCommand(CMD55, 0);
+ return cardCommand(cmd, arg);
+ }
+ uint8_t cardCommand(uint8_t cmd, uint32_t arg);
+ void error(uint8_t code) {errorCode_ = code;}
+ uint8_t readRegister(uint8_t cmd, void* buf);
+ uint8_t sendWriteCommand(uint32_t blockNumber, uint32_t eraseCount);
+ void chipSelectHigh(void);
+ void chipSelectLow(void);
+ void type(uint8_t value) {type_ = value;}
+ uint8_t waitNotBusy(uint16_t timeoutMillis);
+ uint8_t writeData(uint8_t token, const uint8_t* src);
+ uint8_t waitStartBlock(void);
+};
+#endif // Sd2Card_h
diff --git a/libraries/SD/utility/Sd2PinMap.h b/libraries/SD/utility/Sd2PinMap.h new file mode 100644 index 0000000..4bd75a3 --- /dev/null +++ b/libraries/SD/utility/Sd2PinMap.h @@ -0,0 +1,353 @@ +/* Arduino SdFat Library
+ * Copyright (C) 2010 by William Greiman
+ *
+ * This file is part of the Arduino SdFat Library
+ *
+ * This Library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This Library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the Arduino SdFat Library. If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+// Warning this file was generated by a program.
+#ifndef Sd2PinMap_h
+#define Sd2PinMap_h
+#include <avr/io.h>
+
+//------------------------------------------------------------------------------
+/** struct for mapping digital pins */
+struct pin_map_t {
+ volatile uint8_t* ddr;
+ volatile uint8_t* pin;
+ volatile uint8_t* port;
+ uint8_t bit;
+};
+//------------------------------------------------------------------------------
+#if defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
+// Mega
+
+// Two Wire (aka I2C) ports
+uint8_t const SDA_PIN = 20;
+uint8_t const SCL_PIN = 21;
+
+// SPI port
+uint8_t const SS_PIN = 53;
+uint8_t const MOSI_PIN = 51;
+uint8_t const MISO_PIN = 50;
+uint8_t const SCK_PIN = 52;
+
+static const pin_map_t digitalPinMap[] = {
+ {&DDRE, &PINE, &PORTE, 0}, // E0 0
+ {&DDRE, &PINE, &PORTE, 1}, // E1 1
+ {&DDRE, &PINE, &PORTE, 4}, // E4 2
+ {&DDRE, &PINE, &PORTE, 5}, // E5 3
+ {&DDRG, &PING, &PORTG, 5}, // G5 4
+ {&DDRE, &PINE, &PORTE, 3}, // E3 5
+ {&DDRH, &PINH, &PORTH, 3}, // H3 6
+ {&DDRH, &PINH, &PORTH, 4}, // H4 7
+ {&DDRH, &PINH, &PORTH, 5}, // H5 8
+ {&DDRH, &PINH, &PORTH, 6}, // H6 9
+ {&DDRB, &PINB, &PORTB, 4}, // B4 10
+ {&DDRB, &PINB, &PORTB, 5}, // B5 11
+ {&DDRB, &PINB, &PORTB, 6}, // B6 12
+ {&DDRB, &PINB, &PORTB, 7}, // B7 13
+ {&DDRJ, &PINJ, &PORTJ, 1}, // J1 14
+ {&DDRJ, &PINJ, &PORTJ, 0}, // J0 15
+ {&DDRH, &PINH, &PORTH, 1}, // H1 16
+ {&DDRH, &PINH, &PORTH, 0}, // H0 17
+ {&DDRD, &PIND, &PORTD, 3}, // D3 18
+ {&DDRD, &PIND, &PORTD, 2}, // D2 19
+ {&DDRD, &PIND, &PORTD, 1}, // D1 20
+ {&DDRD, &PIND, &PORTD, 0}, // D0 21
+ {&DDRA, &PINA, &PORTA, 0}, // A0 22
+ {&DDRA, &PINA, &PORTA, 1}, // A1 23
+ {&DDRA, &PINA, &PORTA, 2}, // A2 24
+ {&DDRA, &PINA, &PORTA, 3}, // A3 25
+ {&DDRA, &PINA, &PORTA, 4}, // A4 26
+ {&DDRA, &PINA, &PORTA, 5}, // A5 27
+ {&DDRA, &PINA, &PORTA, 6}, // A6 28
+ {&DDRA, &PINA, &PORTA, 7}, // A7 29
+ {&DDRC, &PINC, &PORTC, 7}, // C7 30
+ {&DDRC, &PINC, &PORTC, 6}, // C6 31
+ {&DDRC, &PINC, &PORTC, 5}, // C5 32
+ {&DDRC, &PINC, &PORTC, 4}, // C4 33
+ {&DDRC, &PINC, &PORTC, 3}, // C3 34
+ {&DDRC, &PINC, &PORTC, 2}, // C2 35
+ {&DDRC, &PINC, &PORTC, 1}, // C1 36
+ {&DDRC, &PINC, &PORTC, 0}, // C0 37
+ {&DDRD, &PIND, &PORTD, 7}, // D7 38
+ {&DDRG, &PING, &PORTG, 2}, // G2 39
+ {&DDRG, &PING, &PORTG, 1}, // G1 40
+ {&DDRG, &PING, &PORTG, 0}, // G0 41
+ {&DDRL, &PINL, &PORTL, 7}, // L7 42
+ {&DDRL, &PINL, &PORTL, 6}, // L6 43
+ {&DDRL, &PINL, &PORTL, 5}, // L5 44
+ {&DDRL, &PINL, &PORTL, 4}, // L4 45
+ {&DDRL, &PINL, &PORTL, 3}, // L3 46
+ {&DDRL, &PINL, &PORTL, 2}, // L2 47
+ {&DDRL, &PINL, &PORTL, 1}, // L1 48
+ {&DDRL, &PINL, &PORTL, 0}, // L0 49
+ {&DDRB, &PINB, &PORTB, 3}, // B3 50
+ {&DDRB, &PINB, &PORTB, 2}, // B2 51
+ {&DDRB, &PINB, &PORTB, 1}, // B1 52
+ {&DDRB, &PINB, &PORTB, 0}, // B0 53
+ {&DDRF, &PINF, &PORTF, 0}, // F0 54
+ {&DDRF, &PINF, &PORTF, 1}, // F1 55
+ {&DDRF, &PINF, &PORTF, 2}, // F2 56
+ {&DDRF, &PINF, &PORTF, 3}, // F3 57
+ {&DDRF, &PINF, &PORTF, 4}, // F4 58
+ {&DDRF, &PINF, &PORTF, 5}, // F5 59
+ {&DDRF, &PINF, &PORTF, 6}, // F6 60
+ {&DDRF, &PINF, &PORTF, 7}, // F7 61
+ {&DDRK, &PINK, &PORTK, 0}, // K0 62
+ {&DDRK, &PINK, &PORTK, 1}, // K1 63
+ {&DDRK, &PINK, &PORTK, 2}, // K2 64
+ {&DDRK, &PINK, &PORTK, 3}, // K3 65
+ {&DDRK, &PINK, &PORTK, 4}, // K4 66
+ {&DDRK, &PINK, &PORTK, 5}, // K5 67
+ {&DDRK, &PINK, &PORTK, 6}, // K6 68
+ {&DDRK, &PINK, &PORTK, 7} // K7 69
+};
+//------------------------------------------------------------------------------
+#elif defined(__AVR_ATmega644P__) || defined(__AVR_ATmega644__)
+// Sanguino
+
+// Two Wire (aka I2C) ports
+uint8_t const SDA_PIN = 17;
+uint8_t const SCL_PIN = 18;
+
+// SPI port
+uint8_t const SS_PIN = 4;
+uint8_t const MOSI_PIN = 5;
+uint8_t const MISO_PIN = 6;
+uint8_t const SCK_PIN = 7;
+
+static const pin_map_t digitalPinMap[] = {
+ {&DDRB, &PINB, &PORTB, 0}, // B0 0
+ {&DDRB, &PINB, &PORTB, 1}, // B1 1
+ {&DDRB, &PINB, &PORTB, 2}, // B2 2
+ {&DDRB, &PINB, &PORTB, 3}, // B3 3
+ {&DDRB, &PINB, &PORTB, 4}, // B4 4
+ {&DDRB, &PINB, &PORTB, 5}, // B5 5
+ {&DDRB, &PINB, &PORTB, 6}, // B6 6
+ {&DDRB, &PINB, &PORTB, 7}, // B7 7
+ {&DDRD, &PIND, &PORTD, 0}, // D0 8
+ {&DDRD, &PIND, &PORTD, 1}, // D1 9
+ {&DDRD, &PIND, &PORTD, 2}, // D2 10
+ {&DDRD, &PIND, &PORTD, 3}, // D3 11
+ {&DDRD, &PIND, &PORTD, 4}, // D4 12
+ {&DDRD, &PIND, &PORTD, 5}, // D5 13
+ {&DDRD, &PIND, &PORTD, 6}, // D6 14
+ {&DDRD, &PIND, &PORTD, 7}, // D7 15
+ {&DDRC, &PINC, &PORTC, 0}, // C0 16
+ {&DDRC, &PINC, &PORTC, 1}, // C1 17
+ {&DDRC, &PINC, &PORTC, 2}, // C2 18
+ {&DDRC, &PINC, &PORTC, 3}, // C3 19
+ {&DDRC, &PINC, &PORTC, 4}, // C4 20
+ {&DDRC, &PINC, &PORTC, 5}, // C5 21
+ {&DDRC, &PINC, &PORTC, 6}, // C6 22
+ {&DDRC, &PINC, &PORTC, 7}, // C7 23
+ {&DDRA, &PINA, &PORTA, 7}, // A7 24
+ {&DDRA, &PINA, &PORTA, 6}, // A6 25
+ {&DDRA, &PINA, &PORTA, 5}, // A5 26
+ {&DDRA, &PINA, &PORTA, 4}, // A4 27
+ {&DDRA, &PINA, &PORTA, 3}, // A3 28
+ {&DDRA, &PINA, &PORTA, 2}, // A2 29
+ {&DDRA, &PINA, &PORTA, 1}, // A1 30
+ {&DDRA, &PINA, &PORTA, 0} // A0 31
+};
+//------------------------------------------------------------------------------
+#elif defined(__AVR_ATmega32U4__)
+// Teensy 2.0
+
+// Two Wire (aka I2C) ports
+uint8_t const SDA_PIN = 6;
+uint8_t const SCL_PIN = 5;
+
+// SPI port
+uint8_t const SS_PIN = 0;
+uint8_t const MOSI_PIN = 2;
+uint8_t const MISO_PIN = 3;
+uint8_t const SCK_PIN = 1;
+
+static const pin_map_t digitalPinMap[] = {
+ {&DDRB, &PINB, &PORTB, 0}, // B0 0
+ {&DDRB, &PINB, &PORTB, 1}, // B1 1
+ {&DDRB, &PINB, &PORTB, 2}, // B2 2
+ {&DDRB, &PINB, &PORTB, 3}, // B3 3
+ {&DDRB, &PINB, &PORTB, 7}, // B7 4
+ {&DDRD, &PIND, &PORTD, 0}, // D0 5
+ {&DDRD, &PIND, &PORTD, 1}, // D1 6
+ {&DDRD, &PIND, &PORTD, 2}, // D2 7
+ {&DDRD, &PIND, &PORTD, 3}, // D3 8
+ {&DDRC, &PINC, &PORTC, 6}, // C6 9
+ {&DDRC, &PINC, &PORTC, 7}, // C7 10
+ {&DDRD, &PIND, &PORTD, 6}, // D6 11
+ {&DDRD, &PIND, &PORTD, 7}, // D7 12
+ {&DDRB, &PINB, &PORTB, 4}, // B4 13
+ {&DDRB, &PINB, &PORTB, 5}, // B5 14
+ {&DDRB, &PINB, &PORTB, 6}, // B6 15
+ {&DDRF, &PINF, &PORTF, 7}, // F7 16
+ {&DDRF, &PINF, &PORTF, 6}, // F6 17
+ {&DDRF, &PINF, &PORTF, 5}, // F5 18
+ {&DDRF, &PINF, &PORTF, 4}, // F4 19
+ {&DDRF, &PINF, &PORTF, 1}, // F1 20
+ {&DDRF, &PINF, &PORTF, 0}, // F0 21
+ {&DDRD, &PIND, &PORTD, 4}, // D4 22
+ {&DDRD, &PIND, &PORTD, 5}, // D5 23
+ {&DDRE, &PINE, &PORTE, 6} // E6 24
+};
+//------------------------------------------------------------------------------
+#elif defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB1286__)
+// Teensy++ 1.0 & 2.0
+
+// Two Wire (aka I2C) ports
+uint8_t const SDA_PIN = 1;
+uint8_t const SCL_PIN = 0;
+
+// SPI port
+uint8_t const SS_PIN = 20;
+uint8_t const MOSI_PIN = 22;
+uint8_t const MISO_PIN = 23;
+uint8_t const SCK_PIN = 21;
+
+static const pin_map_t digitalPinMap[] = {
+ {&DDRD, &PIND, &PORTD, 0}, // D0 0
+ {&DDRD, &PIND, &PORTD, 1}, // D1 1
+ {&DDRD, &PIND, &PORTD, 2}, // D2 2
+ {&DDRD, &PIND, &PORTD, 3}, // D3 3
+ {&DDRD, &PIND, &PORTD, 4}, // D4 4
+ {&DDRD, &PIND, &PORTD, 5}, // D5 5
+ {&DDRD, &PIND, &PORTD, 6}, // D6 6
+ {&DDRD, &PIND, &PORTD, 7}, // D7 7
+ {&DDRE, &PINE, &PORTE, 0}, // E0 8
+ {&DDRE, &PINE, &PORTE, 1}, // E1 9
+ {&DDRC, &PINC, &PORTC, 0}, // C0 10
+ {&DDRC, &PINC, &PORTC, 1}, // C1 11
+ {&DDRC, &PINC, &PORTC, 2}, // C2 12
+ {&DDRC, &PINC, &PORTC, 3}, // C3 13
+ {&DDRC, &PINC, &PORTC, 4}, // C4 14
+ {&DDRC, &PINC, &PORTC, 5}, // C5 15
+ {&DDRC, &PINC, &PORTC, 6}, // C6 16
+ {&DDRC, &PINC, &PORTC, 7}, // C7 17
+ {&DDRE, &PINE, &PORTE, 6}, // E6 18
+ {&DDRE, &PINE, &PORTE, 7}, // E7 19
+ {&DDRB, &PINB, &PORTB, 0}, // B0 20
+ {&DDRB, &PINB, &PORTB, 1}, // B1 21
+ {&DDRB, &PINB, &PORTB, 2}, // B2 22
+ {&DDRB, &PINB, &PORTB, 3}, // B3 23
+ {&DDRB, &PINB, &PORTB, 4}, // B4 24
+ {&DDRB, &PINB, &PORTB, 5}, // B5 25
+ {&DDRB, &PINB, &PORTB, 6}, // B6 26
+ {&DDRB, &PINB, &PORTB, 7}, // B7 27
+ {&DDRA, &PINA, &PORTA, 0}, // A0 28
+ {&DDRA, &PINA, &PORTA, 1}, // A1 29
+ {&DDRA, &PINA, &PORTA, 2}, // A2 30
+ {&DDRA, &PINA, &PORTA, 3}, // A3 31
+ {&DDRA, &PINA, &PORTA, 4}, // A4 32
+ {&DDRA, &PINA, &PORTA, 5}, // A5 33
+ {&DDRA, &PINA, &PORTA, 6}, // A6 34
+ {&DDRA, &PINA, &PORTA, 7}, // A7 35
+ {&DDRE, &PINE, &PORTE, 4}, // E4 36
+ {&DDRE, &PINE, &PORTE, 5}, // E5 37
+ {&DDRF, &PINF, &PORTF, 0}, // F0 38
+ {&DDRF, &PINF, &PORTF, 1}, // F1 39
+ {&DDRF, &PINF, &PORTF, 2}, // F2 40
+ {&DDRF, &PINF, &PORTF, 3}, // F3 41
+ {&DDRF, &PINF, &PORTF, 4}, // F4 42
+ {&DDRF, &PINF, &PORTF, 5}, // F5 43
+ {&DDRF, &PINF, &PORTF, 6}, // F6 44
+ {&DDRF, &PINF, &PORTF, 7} // F7 45
+};
+//------------------------------------------------------------------------------
+#else // defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
+// 168 and 328 Arduinos
+
+// Two Wire (aka I2C) ports
+uint8_t const SDA_PIN = 18;
+uint8_t const SCL_PIN = 19;
+
+// SPI port
+uint8_t const SS_PIN = 10;
+uint8_t const MOSI_PIN = 11;
+uint8_t const MISO_PIN = 12;
+uint8_t const SCK_PIN = 13;
+
+static const pin_map_t digitalPinMap[] = {
+ {&DDRD, &PIND, &PORTD, 0}, // D0 0
+ {&DDRD, &PIND, &PORTD, 1}, // D1 1
+ {&DDRD, &PIND, &PORTD, 2}, // D2 2
+ {&DDRD, &PIND, &PORTD, 3}, // D3 3
+ {&DDRD, &PIND, &PORTD, 4}, // D4 4
+ {&DDRD, &PIND, &PORTD, 5}, // D5 5
+ {&DDRD, &PIND, &PORTD, 6}, // D6 6
+ {&DDRD, &PIND, &PORTD, 7}, // D7 7
+ {&DDRB, &PINB, &PORTB, 0}, // B0 8
+ {&DDRB, &PINB, &PORTB, 1}, // B1 9
+ {&DDRB, &PINB, &PORTB, 2}, // B2 10
+ {&DDRB, &PINB, &PORTB, 3}, // B3 11
+ {&DDRB, &PINB, &PORTB, 4}, // B4 12
+ {&DDRB, &PINB, &PORTB, 5}, // B5 13
+ {&DDRC, &PINC, &PORTC, 0}, // C0 14
+ {&DDRC, &PINC, &PORTC, 1}, // C1 15
+ {&DDRC, &PINC, &PORTC, 2}, // C2 16
+ {&DDRC, &PINC, &PORTC, 3}, // C3 17
+ {&DDRC, &PINC, &PORTC, 4}, // C4 18
+ {&DDRC, &PINC, &PORTC, 5} // C5 19
+};
+#endif // defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
+//------------------------------------------------------------------------------
+static const uint8_t digitalPinCount = sizeof(digitalPinMap)/sizeof(pin_map_t);
+
+uint8_t badPinNumber(void)
+ __attribute__((error("Pin number is too large or not a constant")));
+
+static inline __attribute__((always_inline))
+ uint8_t getPinMode(uint8_t pin) {
+ if (__builtin_constant_p(pin) && pin < digitalPinCount) {
+ return (*digitalPinMap[pin].ddr >> digitalPinMap[pin].bit) & 1;
+ } else {
+ return badPinNumber();
+ }
+}
+static inline __attribute__((always_inline))
+ void setPinMode(uint8_t pin, uint8_t mode) {
+ if (__builtin_constant_p(pin) && pin < digitalPinCount) {
+ if (mode) {
+ *digitalPinMap[pin].ddr |= 1 << digitalPinMap[pin].bit;
+ } else {
+ *digitalPinMap[pin].ddr &= ~(1 << digitalPinMap[pin].bit);
+ }
+ } else {
+ badPinNumber();
+ }
+}
+static inline __attribute__((always_inline))
+ uint8_t fastDigitalRead(uint8_t pin) {
+ if (__builtin_constant_p(pin) && pin < digitalPinCount) {
+ return (*digitalPinMap[pin].pin >> digitalPinMap[pin].bit) & 1;
+ } else {
+ return badPinNumber();
+ }
+}
+static inline __attribute__((always_inline))
+ void fastDigitalWrite(uint8_t pin, uint8_t value) {
+ if (__builtin_constant_p(pin) && pin < digitalPinCount) {
+ if (value) {
+ *digitalPinMap[pin].port |= 1 << digitalPinMap[pin].bit;
+ } else {
+ *digitalPinMap[pin].port &= ~(1 << digitalPinMap[pin].bit);
+ }
+ } else {
+ badPinNumber();
+ }
+}
+#endif // Sd2PinMap_h
diff --git a/libraries/SD/utility/SdFat.h b/libraries/SD/utility/SdFat.h new file mode 100644 index 0000000..344326f --- /dev/null +++ b/libraries/SD/utility/SdFat.h @@ -0,0 +1,547 @@ +/* Arduino SdFat Library
+ * Copyright (C) 2009 by William Greiman
+ *
+ * This file is part of the Arduino SdFat Library
+ *
+ * This Library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This Library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the Arduino SdFat Library. If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+#ifndef SdFat_h
+#define SdFat_h
+/**
+ * \file
+ * SdFile and SdVolume classes
+ */
+#include <avr/pgmspace.h>
+#include "Sd2Card.h"
+#include "FatStructs.h"
+#include "Print.h"
+//------------------------------------------------------------------------------
+/**
+ * Allow use of deprecated functions if non-zero
+ */
+#define ALLOW_DEPRECATED_FUNCTIONS 1
+//------------------------------------------------------------------------------
+// forward declaration since SdVolume is used in SdFile
+class SdVolume;
+//==============================================================================
+// SdFile class
+
+// flags for ls()
+/** ls() flag to print modify date */
+uint8_t const LS_DATE = 1;
+/** ls() flag to print file size */
+uint8_t const LS_SIZE = 2;
+/** ls() flag for recursive list of subdirectories */
+uint8_t const LS_R = 4;
+
+// use the gnu style oflag in open()
+/** open() oflag for reading */
+uint8_t const O_READ = 0X01;
+/** open() oflag - same as O_READ */
+uint8_t const O_RDONLY = O_READ;
+/** open() oflag for write */
+uint8_t const O_WRITE = 0X02;
+/** open() oflag - same as O_WRITE */
+uint8_t const O_WRONLY = O_WRITE;
+/** open() oflag for reading and writing */
+uint8_t const O_RDWR = (O_READ | O_WRITE);
+/** open() oflag mask for access modes */
+uint8_t const O_ACCMODE = (O_READ | O_WRITE);
+/** The file offset shall be set to the end of the file prior to each write. */
+uint8_t const O_APPEND = 0X04;
+/** synchronous writes - call sync() after each write */
+uint8_t const O_SYNC = 0X08;
+/** create the file if nonexistent */
+uint8_t const O_CREAT = 0X10;
+/** If O_CREAT and O_EXCL are set, open() shall fail if the file exists */
+uint8_t const O_EXCL = 0X20;
+/** truncate the file to zero length */
+uint8_t const O_TRUNC = 0X40;
+
+// flags for timestamp
+/** set the file's last access date */
+uint8_t const T_ACCESS = 1;
+/** set the file's creation date and time */
+uint8_t const T_CREATE = 2;
+/** Set the file's write date and time */
+uint8_t const T_WRITE = 4;
+// values for type_
+/** This SdFile has not been opened. */
+uint8_t const FAT_FILE_TYPE_CLOSED = 0;
+/** SdFile for a file */
+uint8_t const FAT_FILE_TYPE_NORMAL = 1;
+/** SdFile for a FAT16 root directory */
+uint8_t const FAT_FILE_TYPE_ROOT16 = 2;
+/** SdFile for a FAT32 root directory */
+uint8_t const FAT_FILE_TYPE_ROOT32 = 3;
+/** SdFile for a subdirectory */
+uint8_t const FAT_FILE_TYPE_SUBDIR = 4;
+/** Test value for directory type */
+uint8_t const FAT_FILE_TYPE_MIN_DIR = FAT_FILE_TYPE_ROOT16;
+
+/** date field for FAT directory entry */
+static inline uint16_t FAT_DATE(uint16_t year, uint8_t month, uint8_t day) {
+ return (year - 1980) << 9 | month << 5 | day;
+}
+/** year part of FAT directory date field */
+static inline uint16_t FAT_YEAR(uint16_t fatDate) {
+ return 1980 + (fatDate >> 9);
+}
+/** month part of FAT directory date field */
+static inline uint8_t FAT_MONTH(uint16_t fatDate) {
+ return (fatDate >> 5) & 0XF;
+}
+/** day part of FAT directory date field */
+static inline uint8_t FAT_DAY(uint16_t fatDate) {
+ return fatDate & 0X1F;
+}
+/** time field for FAT directory entry */
+static inline uint16_t FAT_TIME(uint8_t hour, uint8_t minute, uint8_t second) {
+ return hour << 11 | minute << 5 | second >> 1;
+}
+/** hour part of FAT directory time field */
+static inline uint8_t FAT_HOUR(uint16_t fatTime) {
+ return fatTime >> 11;
+}
+/** minute part of FAT directory time field */
+static inline uint8_t FAT_MINUTE(uint16_t fatTime) {
+ return(fatTime >> 5) & 0X3F;
+}
+/** second part of FAT directory time field */
+static inline uint8_t FAT_SECOND(uint16_t fatTime) {
+ return 2*(fatTime & 0X1F);
+}
+/** Default date for file timestamps is 1 Jan 2000 */
+uint16_t const FAT_DEFAULT_DATE = ((2000 - 1980) << 9) | (1 << 5) | 1;
+/** Default time for file timestamp is 1 am */
+uint16_t const FAT_DEFAULT_TIME = (1 << 11);
+//------------------------------------------------------------------------------
+/**
+ * \class SdFile
+ * \brief Access FAT16 and FAT32 files on SD and SDHC cards.
+ */
+class SdFile : public Print {
+ public:
+ /** Create an instance of SdFile. */
+ SdFile(void) : type_(FAT_FILE_TYPE_CLOSED) {}
+ /**
+ * writeError is set to true if an error occurs during a write().
+ * Set writeError to false before calling print() and/or write() and check
+ * for true after calls to print() and/or write().
+ */
+ //bool writeError;
+ /**
+ * Cancel unbuffered reads for this file.
+ * See setUnbufferedRead()
+ */
+ void clearUnbufferedRead(void) {
+ flags_ &= ~F_FILE_UNBUFFERED_READ;
+ }
+ uint8_t close(void);
+ uint8_t contiguousRange(uint32_t* bgnBlock, uint32_t* endBlock);
+ uint8_t createContiguous(SdFile* dirFile,
+ const char* fileName, uint32_t size);
+ /** \return The current cluster number for a file or directory. */
+ uint32_t curCluster(void) const {return curCluster_;}
+ /** \return The current position for a file or directory. */
+ uint32_t curPosition(void) const {return curPosition_;}
+ /**
+ * Set the date/time callback function
+ *
+ * \param[in] dateTime The user's call back function. The callback
+ * function is of the form:
+ *
+ * \code
+ * void dateTime(uint16_t* date, uint16_t* time) {
+ * uint16_t year;
+ * uint8_t month, day, hour, minute, second;
+ *
+ * // User gets date and time from GPS or real-time clock here
+ *
+ * // return date using FAT_DATE macro to format fields
+ * *date = FAT_DATE(year, month, day);
+ *
+ * // return time using FAT_TIME macro to format fields
+ * *time = FAT_TIME(hour, minute, second);
+ * }
+ * \endcode
+ *
+ * Sets the function that is called when a file is created or when
+ * a file's directory entry is modified by sync(). All timestamps,
+ * access, creation, and modify, are set when a file is created.
+ * sync() maintains the last access date and last modify date/time.
+ *
+ * See the timestamp() function.
+ */
+ static void dateTimeCallback(
+ void (*dateTime)(uint16_t* date, uint16_t* time)) {
+ dateTime_ = dateTime;
+ }
+ /**
+ * Cancel the date/time callback function.
+ */
+ static void dateTimeCallbackCancel(void) {
+ // use explicit zero since NULL is not defined for Sanguino
+ dateTime_ = 0;
+ }
+ /** \return Address of the block that contains this file's directory. */
+ uint32_t dirBlock(void) const {return dirBlock_;}
+ uint8_t dirEntry(dir_t* dir);
+ /** \return Index of this file's directory in the block dirBlock. */
+ uint8_t dirIndex(void) const {return dirIndex_;}
+ static void dirName(const dir_t& dir, char* name);
+ /** \return The total number of bytes in a file or directory. */
+ uint32_t fileSize(void) const {return fileSize_;}
+ /** \return The first cluster number for a file or directory. */
+ uint32_t firstCluster(void) const {return firstCluster_;}
+ /** \return True if this is a SdFile for a directory else false. */
+ uint8_t isDir(void) const {return type_ >= FAT_FILE_TYPE_MIN_DIR;}
+ /** \return True if this is a SdFile for a file else false. */
+ uint8_t isFile(void) const {return type_ == FAT_FILE_TYPE_NORMAL;}
+ /** \return True if this is a SdFile for an open file/directory else false. */
+ uint8_t isOpen(void) const {return type_ != FAT_FILE_TYPE_CLOSED;}
+ /** \return True if this is a SdFile for a subdirectory else false. */
+ uint8_t isSubDir(void) const {return type_ == FAT_FILE_TYPE_SUBDIR;}
+ /** \return True if this is a SdFile for the root directory. */
+ uint8_t isRoot(void) const {
+ return type_ == FAT_FILE_TYPE_ROOT16 || type_ == FAT_FILE_TYPE_ROOT32;
+ }
+ void ls(uint8_t flags = 0, uint8_t indent = 0);
+ uint8_t makeDir(SdFile* dir, const char* dirName);
+ uint8_t open(SdFile* dirFile, uint16_t index, uint8_t oflag);
+ uint8_t open(SdFile* dirFile, const char* fileName, uint8_t oflag);
+
+ uint8_t openRoot(SdVolume* vol);
+ static void printDirName(const dir_t& dir, uint8_t width);
+ static void printFatDate(uint16_t fatDate);
+ static void printFatTime(uint16_t fatTime);
+ static void printTwoDigits(uint8_t v);
+ /**
+ * Read the next byte from a file.
+ *
+ * \return For success read returns the next byte in the file as an int.
+ * If an error occurs or end of file is reached -1 is returned.
+ */
+ int16_t read(void) {
+ uint8_t b;
+ return read(&b, 1) == 1 ? b : -1;
+ }
+ int16_t read(void* buf, uint16_t nbyte);
+ int8_t readDir(dir_t* dir);
+ static uint8_t remove(SdFile* dirFile, const char* fileName);
+ uint8_t remove(void);
+ /** Set the file's current position to zero. */
+ void rewind(void) {
+ curPosition_ = curCluster_ = 0;
+ }
+ uint8_t rmDir(void);
+ uint8_t rmRfStar(void);
+ /** Set the files position to current position + \a pos. See seekSet(). */
+ uint8_t seekCur(uint32_t pos) {
+ return seekSet(curPosition_ + pos);
+ }
+ /**
+ * Set the files current position to end of file. Useful to position
+ * a file for append. See seekSet().
+ */
+ uint8_t seekEnd(void) {return seekSet(fileSize_);}
+ uint8_t seekSet(uint32_t pos);
+ /**
+ * Use unbuffered reads to access this file. Used with Wave
+ * Shield ISR. Used with Sd2Card::partialBlockRead() in WaveRP.
+ *
+ * Not recommended for normal applications.
+ */
+ void setUnbufferedRead(void) {
+ if (isFile()) flags_ |= F_FILE_UNBUFFERED_READ;
+ }
+ uint8_t timestamp(uint8_t flag, uint16_t year, uint8_t month, uint8_t day,
+ uint8_t hour, uint8_t minute, uint8_t second);
+ uint8_t sync(void);
+ /** Type of this SdFile. You should use isFile() or isDir() instead of type()
+ * if possible.
+ *
+ * \return The file or directory type.
+ */
+ uint8_t type(void) const {return type_;}
+ uint8_t truncate(uint32_t size);
+ /** \return Unbuffered read flag. */
+ uint8_t unbufferedRead(void) const {
+ return flags_ & F_FILE_UNBUFFERED_READ;
+ }
+ /** \return SdVolume that contains this file. */
+ SdVolume* volume(void) const {return vol_;}
+ size_t write(uint8_t b);
+ size_t write(const void* buf, uint16_t nbyte);
+ size_t write(const char* str);
+ void write_P(PGM_P str);
+ void writeln_P(PGM_P str);
+//------------------------------------------------------------------------------
+#if ALLOW_DEPRECATED_FUNCTIONS
+// Deprecated functions - suppress cpplint warnings with NOLINT comment
+ /** \deprecated Use:
+ * uint8_t SdFile::contiguousRange(uint32_t* bgnBlock, uint32_t* endBlock);
+ */
+ uint8_t contiguousRange(uint32_t& bgnBlock, uint32_t& endBlock) { // NOLINT
+ return contiguousRange(&bgnBlock, &endBlock);
+ }
+ /** \deprecated Use:
+ * uint8_t SdFile::createContiguous(SdFile* dirFile,
+ * const char* fileName, uint32_t size)
+ */
+ uint8_t createContiguous(SdFile& dirFile, // NOLINT
+ const char* fileName, uint32_t size) {
+ return createContiguous(&dirFile, fileName, size);
+ }
+
+ /**
+ * \deprecated Use:
+ * static void SdFile::dateTimeCallback(
+ * void (*dateTime)(uint16_t* date, uint16_t* time));
+ */
+ static void dateTimeCallback(
+ void (*dateTime)(uint16_t& date, uint16_t& time)) { // NOLINT
+ oldDateTime_ = dateTime;
+ dateTime_ = dateTime ? oldToNew : 0;
+ }
+ /** \deprecated Use: uint8_t SdFile::dirEntry(dir_t* dir); */
+ uint8_t dirEntry(dir_t& dir) {return dirEntry(&dir);} // NOLINT
+ /** \deprecated Use:
+ * uint8_t SdFile::makeDir(SdFile* dir, const char* dirName);
+ */
+ uint8_t makeDir(SdFile& dir, const char* dirName) { // NOLINT
+ return makeDir(&dir, dirName);
+ }
+ /** \deprecated Use:
+ * uint8_t SdFile::open(SdFile* dirFile, const char* fileName, uint8_t oflag);
+ */
+ uint8_t open(SdFile& dirFile, // NOLINT
+ const char* fileName, uint8_t oflag) {
+ return open(&dirFile, fileName, oflag);
+ }
+ /** \deprecated Do not use in new apps */
+ uint8_t open(SdFile& dirFile, const char* fileName) { // NOLINT
+ return open(dirFile, fileName, O_RDWR);
+ }
+ /** \deprecated Use:
+ * uint8_t SdFile::open(SdFile* dirFile, uint16_t index, uint8_t oflag);
+ */
+ uint8_t open(SdFile& dirFile, uint16_t index, uint8_t oflag) { // NOLINT
+ return open(&dirFile, index, oflag);
+ }
+ /** \deprecated Use: uint8_t SdFile::openRoot(SdVolume* vol); */
+ uint8_t openRoot(SdVolume& vol) {return openRoot(&vol);} // NOLINT
+
+ /** \deprecated Use: int8_t SdFile::readDir(dir_t* dir); */
+ int8_t readDir(dir_t& dir) {return readDir(&dir);} // NOLINT
+ /** \deprecated Use:
+ * static uint8_t SdFile::remove(SdFile* dirFile, const char* fileName);
+ */
+ static uint8_t remove(SdFile& dirFile, const char* fileName) { // NOLINT
+ return remove(&dirFile, fileName);
+ }
+//------------------------------------------------------------------------------
+// rest are private
+ private:
+ static void (*oldDateTime_)(uint16_t& date, uint16_t& time); // NOLINT
+ static void oldToNew(uint16_t* date, uint16_t* time) {
+ uint16_t d;
+ uint16_t t;
+ oldDateTime_(d, t);
+ *date = d;
+ *time = t;
+ }
+#endif // ALLOW_DEPRECATED_FUNCTIONS
+ private:
+ // bits defined in flags_
+ // should be 0XF
+ static uint8_t const F_OFLAG = (O_ACCMODE | O_APPEND | O_SYNC);
+ // available bits
+ static uint8_t const F_UNUSED = 0X30;
+ // use unbuffered SD read
+ static uint8_t const F_FILE_UNBUFFERED_READ = 0X40;
+ // sync of directory entry required
+ static uint8_t const F_FILE_DIR_DIRTY = 0X80;
+
+// make sure F_OFLAG is ok
+#if ((F_UNUSED | F_FILE_UNBUFFERED_READ | F_FILE_DIR_DIRTY) & F_OFLAG)
+#error flags_ bits conflict
+#endif // flags_ bits
+
+ // private data
+ uint8_t flags_; // See above for definition of flags_ bits
+ uint8_t type_; // type of file see above for values
+ uint32_t curCluster_; // cluster for current file position
+ uint32_t curPosition_; // current file position in bytes from beginning
+ uint32_t dirBlock_; // SD block that contains directory entry for file
+ uint8_t dirIndex_; // index of entry in dirBlock 0 <= dirIndex_ <= 0XF
+ uint32_t fileSize_; // file size in bytes
+ uint32_t firstCluster_; // first cluster of file
+ SdVolume* vol_; // volume where file is located
+
+ // private functions
+ uint8_t addCluster(void);
+ uint8_t addDirCluster(void);
+ dir_t* cacheDirEntry(uint8_t action);
+ static void (*dateTime_)(uint16_t* date, uint16_t* time);
+ static uint8_t make83Name(const char* str, uint8_t* name);
+ uint8_t openCachedEntry(uint8_t cacheIndex, uint8_t oflags);
+ dir_t* readDirCache(void);
+};
+//==============================================================================
+// SdVolume class
+/**
+ * \brief Cache for an SD data block
+ */
+union cache_t {
+ /** Used to access cached file data blocks. */
+ uint8_t data[512];
+ /** Used to access cached FAT16 entries. */
+ uint16_t fat16[256];
+ /** Used to access cached FAT32 entries. */
+ uint32_t fat32[128];
+ /** Used to access cached directory entries. */
+ dir_t dir[16];
+ /** Used to access a cached MasterBoot Record. */
+ mbr_t mbr;
+ /** Used to access to a cached FAT boot sector. */
+ fbs_t fbs;
+};
+//------------------------------------------------------------------------------
+/**
+ * \class SdVolume
+ * \brief Access FAT16 and FAT32 volumes on SD and SDHC cards.
+ */
+class SdVolume {
+ public:
+ /** Create an instance of SdVolume */
+ SdVolume(void) :allocSearchStart_(2), fatType_(0) {}
+ /** Clear the cache and returns a pointer to the cache. Used by the WaveRP
+ * recorder to do raw write to the SD card. Not for normal apps.
+ */
+ static uint8_t* cacheClear(void) {
+ cacheFlush();
+ cacheBlockNumber_ = 0XFFFFFFFF;
+ return cacheBuffer_.data;
+ }
+ /**
+ * Initialize a FAT volume. Try partition one first then try super
+ * floppy format.
+ *
+ * \param[in] dev The Sd2Card where the volume is located.
+ *
+ * \return The value one, true, is returned for success and
+ * the value zero, false, is returned for failure. Reasons for
+ * failure include not finding a valid partition, not finding a valid
+ * FAT file system or an I/O error.
+ */
+ uint8_t init(Sd2Card* dev) { return init(dev, 1) ? true : init(dev, 0);}
+ uint8_t init(Sd2Card* dev, uint8_t part);
+
+ // inline functions that return volume info
+ /** \return The volume's cluster size in blocks. */
+ uint8_t blocksPerCluster(void) const {return blocksPerCluster_;}
+ /** \return The number of blocks in one FAT. */
+ uint32_t blocksPerFat(void) const {return blocksPerFat_;}
+ /** \return The total number of clusters in the volume. */
+ uint32_t clusterCount(void) const {return clusterCount_;}
+ /** \return The shift count required to multiply by blocksPerCluster. */
+ uint8_t clusterSizeShift(void) const {return clusterSizeShift_;}
+ /** \return The logical block number for the start of file data. */
+ uint32_t dataStartBlock(void) const {return dataStartBlock_;}
+ /** \return The number of FAT structures on the volume. */
+ uint8_t fatCount(void) const {return fatCount_;}
+ /** \return The logical block number for the start of the first FAT. */
+ uint32_t fatStartBlock(void) const {return fatStartBlock_;}
+ /** \return The FAT type of the volume. Values are 12, 16 or 32. */
+ uint8_t fatType(void) const {return fatType_;}
+ /** \return The number of entries in the root directory for FAT16 volumes. */
+ uint32_t rootDirEntryCount(void) const {return rootDirEntryCount_;}
+ /** \return The logical block number for the start of the root directory
+ on FAT16 volumes or the first cluster number on FAT32 volumes. */
+ uint32_t rootDirStart(void) const {return rootDirStart_;}
+ /** return a pointer to the Sd2Card object for this volume */
+ static Sd2Card* sdCard(void) {return sdCard_;}
+//------------------------------------------------------------------------------
+#if ALLOW_DEPRECATED_FUNCTIONS
+ // Deprecated functions - suppress cpplint warnings with NOLINT comment
+ /** \deprecated Use: uint8_t SdVolume::init(Sd2Card* dev); */
+ uint8_t init(Sd2Card& dev) {return init(&dev);} // NOLINT
+
+ /** \deprecated Use: uint8_t SdVolume::init(Sd2Card* dev, uint8_t vol); */
+ uint8_t init(Sd2Card& dev, uint8_t part) { // NOLINT
+ return init(&dev, part);
+ }
+#endif // ALLOW_DEPRECATED_FUNCTIONS
+//------------------------------------------------------------------------------
+ private:
+ // Allow SdFile access to SdVolume private data.
+ friend class SdFile;
+
+ // value for action argument in cacheRawBlock to indicate read from cache
+ static uint8_t const CACHE_FOR_READ = 0;
+ // value for action argument in cacheRawBlock to indicate cache dirty
+ static uint8_t const CACHE_FOR_WRITE = 1;
+
+ static cache_t cacheBuffer_; // 512 byte cache for device blocks
+ static uint32_t cacheBlockNumber_; // Logical number of block in the cache
+ static Sd2Card* sdCard_; // Sd2Card object for cache
+ static uint8_t cacheDirty_; // cacheFlush() will write block if true
+ static uint32_t cacheMirrorBlock_; // block number for mirror FAT
+//
+ uint32_t allocSearchStart_; // start cluster for alloc search
+ uint8_t blocksPerCluster_; // cluster size in blocks
+ uint32_t blocksPerFat_; // FAT size in blocks
+ uint32_t clusterCount_; // clusters in one FAT
+ uint8_t clusterSizeShift_; // shift to convert cluster count to block count
+ uint32_t dataStartBlock_; // first data block number
+ uint8_t fatCount_; // number of FATs on volume
+ uint32_t fatStartBlock_; // start block for first FAT
+ uint8_t fatType_; // volume type (12, 16, OR 32)
+ uint16_t rootDirEntryCount_; // number of entries in FAT16 root dir
+ uint32_t rootDirStart_; // root start block for FAT16, cluster for FAT32
+ //----------------------------------------------------------------------------
+ uint8_t allocContiguous(uint32_t count, uint32_t* curCluster);
+ uint8_t blockOfCluster(uint32_t position) const {
+ return (position >> 9) & (blocksPerCluster_ - 1);}
+ uint32_t clusterStartBlock(uint32_t cluster) const {
+ return dataStartBlock_ + ((cluster - 2) << clusterSizeShift_);}
+ uint32_t blockNumber(uint32_t cluster, uint32_t position) const {
+ return clusterStartBlock(cluster) + blockOfCluster(position);}
+ static uint8_t cacheFlush(void);
+ static uint8_t cacheRawBlock(uint32_t blockNumber, uint8_t action);
+ static void cacheSetDirty(void) {cacheDirty_ |= CACHE_FOR_WRITE;}
+ static uint8_t cacheZeroBlock(uint32_t blockNumber);
+ uint8_t chainSize(uint32_t beginCluster, uint32_t* size) const;
+ uint8_t fatGet(uint32_t cluster, uint32_t* value) const;
+ uint8_t fatPut(uint32_t cluster, uint32_t value);
+ uint8_t fatPutEOC(uint32_t cluster) {
+ return fatPut(cluster, 0x0FFFFFFF);
+ }
+ uint8_t freeChain(uint32_t cluster);
+ uint8_t isEOC(uint32_t cluster) const {
+ return cluster >= (fatType_ == 16 ? FAT16EOC_MIN : FAT32EOC_MIN);
+ }
+ uint8_t readBlock(uint32_t block, uint8_t* dst) {
+ return sdCard_->readBlock(block, dst);}
+ uint8_t readData(uint32_t block, uint16_t offset,
+ uint16_t count, uint8_t* dst) {
+ return sdCard_->readData(block, offset, count, dst);
+ }
+ uint8_t writeBlock(uint32_t block, const uint8_t* dst) {
+ return sdCard_->writeBlock(block, dst);
+ }
+};
+#endif // SdFat_h
diff --git a/libraries/SD/utility/SdFatUtil.h b/libraries/SD/utility/SdFatUtil.h new file mode 100644 index 0000000..7d6b410 --- /dev/null +++ b/libraries/SD/utility/SdFatUtil.h @@ -0,0 +1,71 @@ +/* Arduino SdFat Library
+ * Copyright (C) 2008 by William Greiman
+ *
+ * This file is part of the Arduino SdFat Library
+ *
+ * This Library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This Library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with the Arduino SdFat Library. If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+#ifndef SdFatUtil_h
+#define SdFatUtil_h
+/**
+ * \file
+ * Useful utility functions.
+ */
+#include <Arduino.h>
+#include <avr/pgmspace.h>
+/** Store and print a string in flash memory.*/
+#define PgmPrint(x) SerialPrint_P(PSTR(x))
+/** Store and print a string in flash memory followed by a CR/LF.*/
+#define PgmPrintln(x) SerialPrintln_P(PSTR(x))
+/** Defined so doxygen works for function definitions. */
+#define NOINLINE __attribute__((noinline,unused))
+#define UNUSEDOK __attribute__((unused))
+//------------------------------------------------------------------------------
+/** Return the number of bytes currently free in RAM. */
+static UNUSEDOK int FreeRam(void) {
+ extern int __bss_end;
+ extern int* __brkval;
+ int free_memory;
+ if (reinterpret_cast<int>(__brkval) == 0) {
+ // if no heap use from end of bss section
+ free_memory = reinterpret_cast<int>(&free_memory)
+ - reinterpret_cast<int>(&__bss_end);
+ } else {
+ // use from top of stack to heap
+ free_memory = reinterpret_cast<int>(&free_memory)
+ - reinterpret_cast<int>(__brkval);
+ }
+ return free_memory;
+}
+//------------------------------------------------------------------------------
+/**
+ * %Print a string in flash memory to the serial port.
+ *
+ * \param[in] str Pointer to string stored in flash memory.
+ */
+static NOINLINE void SerialPrint_P(PGM_P str) {
+ for (uint8_t c; (c = pgm_read_byte(str)); str++) Serial.write(c);
+}
+//------------------------------------------------------------------------------
+/**
+ * %Print a string in flash memory followed by a CR/LF.
+ *
+ * \param[in] str Pointer to string stored in flash memory.
+ */
+static NOINLINE void SerialPrintln_P(PGM_P str) {
+ SerialPrint_P(str);
+ Serial.println();
+}
+#endif // #define SdFatUtil_h
diff --git a/libraries/SD/utility/SdFatmainpage.h b/libraries/SD/utility/SdFatmainpage.h new file mode 100644 index 0000000..73b3b63 --- /dev/null +++ b/libraries/SD/utility/SdFatmainpage.h @@ -0,0 +1,202 @@ +/* Arduino SdFat Library
+ * Copyright (C) 2009 by William Greiman
+ *
+ * This file is part of the Arduino SdFat Library
+ *
+ * This Library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This Library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the Arduino SdFat Library. If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+/**
+\mainpage Arduino SdFat Library
+<CENTER>Copyright © 2009 by William Greiman
+</CENTER>
+
+\section Intro Introduction
+The Arduino SdFat Library is a minimal implementation of FAT16 and FAT32
+file systems on SD flash memory cards. Standard SD and high capacity
+SDHC cards are supported.
+
+The SdFat only supports short 8.3 names.
+
+The main classes in SdFat are Sd2Card, SdVolume, and SdFile.
+
+The Sd2Card class supports access to standard SD cards and SDHC cards. Most
+applications will only need to call the Sd2Card::init() member function.
+
+The SdVolume class supports FAT16 and FAT32 partitions. Most applications
+will only need to call the SdVolume::init() member function.
+
+The SdFile class provides file access functions such as open(), read(),
+remove(), write(), close() and sync(). This class supports access to the root
+directory and subdirectories.
+
+A number of example are provided in the SdFat/examples folder. These were
+developed to test SdFat and illustrate its use.
+
+SdFat was developed for high speed data recording. SdFat was used to implement
+an audio record/play class, WaveRP, for the Adafruit Wave Shield. This
+application uses special Sd2Card calls to write to contiguous files in raw mode.
+These functions reduce write latency so that audio can be recorded with the
+small amount of RAM in the Arduino.
+
+\section SDcard SD\SDHC Cards
+
+Arduinos access SD cards using the cards SPI protocol. PCs, Macs, and
+most consumer devices use the 4-bit parallel SD protocol. A card that
+functions well on A PC or Mac may not work well on the Arduino.
+
+Most cards have good SPI read performance but cards vary widely in SPI
+write performance. Write performance is limited by how efficiently the
+card manages internal erase/remapping operations. The Arduino cannot
+optimize writes to reduce erase operations because of its limit RAM.
+
+SanDisk cards generally have good write performance. They seem to have
+more internal RAM buffering than other cards and therefore can limit
+the number of flash erase operations that the Arduino forces due to its
+limited RAM.
+
+\section Hardware Hardware Configuration
+
+SdFat was developed using an
+<A HREF = "http://www.adafruit.com/"> Adafruit Industries</A>
+<A HREF = "http://www.ladyada.net/make/waveshield/"> Wave Shield</A>.
+
+The hardware interface to the SD card should not use a resistor based level
+shifter. SdFat sets the SPI bus frequency to 8 MHz which results in signal
+rise times that are too slow for the edge detectors in many newer SD card
+controllers when resistor voltage dividers are used.
+
+The 5 to 3.3 V level shifter for 5 V Arduinos should be IC based like the
+74HC4050N based circuit shown in the file SdLevel.png. The Adafruit Wave Shield
+uses a 74AHC125N. Gravitech sells SD and MicroSD Card Adapters based on the
+74LCX245.
+
+If you are using a resistor based level shifter and are having problems try
+setting the SPI bus frequency to 4 MHz. This can be done by using
+card.init(SPI_HALF_SPEED) to initialize the SD card.
+
+\section comment Bugs and Comments
+
+If you wish to report bugs or have comments, send email to fat16lib@sbcglobal.net.
+
+\section SdFatClass SdFat Usage
+
+SdFat uses a slightly restricted form of short names.
+Only printable ASCII characters are supported. No characters with code point
+values greater than 127 are allowed. Space is not allowed even though space
+was allowed in the API of early versions of DOS.
+
+Short names are limited to 8 characters followed by an optional period (.)
+and extension of up to 3 characters. The characters may be any combination
+of letters and digits. The following special characters are also allowed:
+
+$ % ' - _ @ ~ ` ! ( ) { } ^ # &
+
+Short names are always converted to upper case and their original case
+value is lost.
+
+\note
+ The Arduino Print class uses character
+at a time writes so it was necessary to use a \link SdFile::sync() sync() \endlink
+function to control when data is written to the SD card.
+
+\par
+An application which writes to a file using \link Print::print() print()\endlink,
+\link Print::println() println() \endlink
+or \link SdFile::write write() \endlink must call \link SdFile::sync() sync() \endlink
+at the appropriate time to force data and directory information to be written
+to the SD Card. Data and directory information are also written to the SD card
+when \link SdFile::close() close() \endlink is called.
+
+\par
+Applications must use care calling \link SdFile::sync() sync() \endlink
+since 2048 bytes of I/O is required to update file and
+directory information. This includes writing the current data block, reading
+the block that contains the directory entry for update, writing the directory
+block back and reading back the current data block.
+
+It is possible to open a file with two or more instances of SdFile. A file may
+be corrupted if data is written to the file by more than one instance of SdFile.
+
+\section HowTo How to format SD Cards as FAT Volumes
+
+You should use a freshly formatted SD card for best performance. FAT
+file systems become slower if many files have been created and deleted.
+This is because the directory entry for a deleted file is marked as deleted,
+but is not deleted. When a new file is created, these entries must be scanned
+before creating the file, a flaw in the FAT design. Also files can become
+fragmented which causes reads and writes to be slower.
+
+Microsoft operating systems support removable media formatted with a
+Master Boot Record, MBR, or formatted as a super floppy with a FAT Boot Sector
+in block zero.
+
+Microsoft operating systems expect MBR formatted removable media
+to have only one partition. The first partition should be used.
+
+Microsoft operating systems do not support partitioning SD flash cards.
+If you erase an SD card with a program like KillDisk, Most versions of
+Windows will format the card as a super floppy.
+
+The best way to restore an SD card's format is to use SDFormatter
+which can be downloaded from:
+
+http://www.sdcard.org/consumers/formatter/
+
+SDFormatter aligns flash erase boundaries with file
+system structures which reduces write latency and file system overhead.
+
+SDFormatter does not have an option for FAT type so it may format
+small cards as FAT12.
+
+After the MBR is restored by SDFormatter you may need to reformat small
+cards that have been formatted FAT12 to force the volume type to be FAT16.
+
+If you reformat the SD card with an OS utility, choose a cluster size that
+will result in:
+
+4084 < CountOfClusters && CountOfClusters < 65525
+
+The volume will then be FAT16.
+
+If you are formatting an SD card on OS X or Linux, be sure to use the first
+partition. Format this partition with a cluster count in above range.
+
+\section References References
+
+Adafruit Industries:
+
+http://www.adafruit.com/
+
+http://www.ladyada.net/make/waveshield/
+
+The Arduino site:
+
+http://www.arduino.cc/
+
+For more information about FAT file systems see:
+
+http://www.microsoft.com/whdc/system/platform/firmware/fatgen.mspx
+
+For information about using SD cards as SPI devices see:
+
+http://www.sdcard.org/developers/tech/sdcard/pls/Simplified_Physical_Layer_Spec.pdf
+
+The ATmega328 datasheet:
+
+http://www.atmel.com/dyn/resources/prod_documents/doc8161.pdf
+
+
+ */
diff --git a/libraries/SD/utility/SdFile.cpp b/libraries/SD/utility/SdFile.cpp new file mode 100644 index 0000000..e786f56 --- /dev/null +++ b/libraries/SD/utility/SdFile.cpp @@ -0,0 +1,1253 @@ +/* Arduino SdFat Library
+ * Copyright (C) 2009 by William Greiman
+ *
+ * This file is part of the Arduino SdFat Library
+ *
+ * This Library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This Library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the Arduino SdFat Library. If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+#include <SdFat.h>
+#include <avr/pgmspace.h>
+#include <Arduino.h>
+//------------------------------------------------------------------------------
+// callback function for date/time
+void (*SdFile::dateTime_)(uint16_t* date, uint16_t* time) = NULL;
+
+#if ALLOW_DEPRECATED_FUNCTIONS
+// suppress cpplint warnings with NOLINT comment
+void (*SdFile::oldDateTime_)(uint16_t& date, uint16_t& time) = NULL; // NOLINT
+#endif // ALLOW_DEPRECATED_FUNCTIONS
+//------------------------------------------------------------------------------
+// add a cluster to a file
+uint8_t SdFile::addCluster() {
+ if (!vol_->allocContiguous(1, &curCluster_)) return false;
+
+ // if first cluster of file link to directory entry
+ if (firstCluster_ == 0) {
+ firstCluster_ = curCluster_;
+ flags_ |= F_FILE_DIR_DIRTY;
+ }
+ return true;
+}
+//------------------------------------------------------------------------------
+// Add a cluster to a directory file and zero the cluster.
+// return with first block of cluster in the cache
+uint8_t SdFile::addDirCluster(void) {
+ if (!addCluster()) return false;
+
+ // zero data in cluster insure first cluster is in cache
+ uint32_t block = vol_->clusterStartBlock(curCluster_);
+ for (uint8_t i = vol_->blocksPerCluster_; i != 0; i--) {
+ if (!SdVolume::cacheZeroBlock(block + i - 1)) return false;
+ }
+ // Increase directory file size by cluster size
+ fileSize_ += 512UL << vol_->clusterSizeShift_;
+ return true;
+}
+//------------------------------------------------------------------------------
+// cache a file's directory entry
+// return pointer to cached entry or null for failure
+dir_t* SdFile::cacheDirEntry(uint8_t action) {
+ if (!SdVolume::cacheRawBlock(dirBlock_, action)) return NULL;
+ return SdVolume::cacheBuffer_.dir + dirIndex_;
+}
+//------------------------------------------------------------------------------
+/**
+ * Close a file and force cached data and directory information
+ * to be written to the storage device.
+ *
+ * \return The value one, true, is returned for success and
+ * the value zero, false, is returned for failure.
+ * Reasons for failure include no file is open or an I/O error.
+ */
+uint8_t SdFile::close(void) {
+ if (!sync())return false;
+ type_ = FAT_FILE_TYPE_CLOSED;
+ return true;
+}
+//------------------------------------------------------------------------------
+/**
+ * Check for contiguous file and return its raw block range.
+ *
+ * \param[out] bgnBlock the first block address for the file.
+ * \param[out] endBlock the last block address for the file.
+ *
+ * \return The value one, true, is returned for success and
+ * the value zero, false, is returned for failure.
+ * Reasons for failure include file is not contiguous, file has zero length
+ * or an I/O error occurred.
+ */
+uint8_t SdFile::contiguousRange(uint32_t* bgnBlock, uint32_t* endBlock) {
+ // error if no blocks
+ if (firstCluster_ == 0) return false;
+
+ for (uint32_t c = firstCluster_; ; c++) {
+ uint32_t next;
+ if (!vol_->fatGet(c, &next)) return false;
+
+ // check for contiguous
+ if (next != (c + 1)) {
+ // error if not end of chain
+ if (!vol_->isEOC(next)) return false;
+ *bgnBlock = vol_->clusterStartBlock(firstCluster_);
+ *endBlock = vol_->clusterStartBlock(c)
+ + vol_->blocksPerCluster_ - 1;
+ return true;
+ }
+ }
+}
+//------------------------------------------------------------------------------
+/**
+ * Create and open a new contiguous file of a specified size.
+ *
+ * \note This function only supports short DOS 8.3 names.
+ * See open() for more information.
+ *
+ * \param[in] dirFile The directory where the file will be created.
+ * \param[in] fileName A valid DOS 8.3 file name.
+ * \param[in] size The desired file size.
+ *
+ * \return The value one, true, is returned for success and
+ * the value zero, false, is returned for failure.
+ * Reasons for failure include \a fileName contains
+ * an invalid DOS 8.3 file name, the FAT volume has not been initialized,
+ * a file is already open, the file already exists, the root
+ * directory is full or an I/O error.
+ *
+ */
+uint8_t SdFile::createContiguous(SdFile* dirFile,
+ const char* fileName, uint32_t size) {
+ // don't allow zero length file
+ if (size == 0) return false;
+ if (!open(dirFile, fileName, O_CREAT | O_EXCL | O_RDWR)) return false;
+
+ // calculate number of clusters needed
+ uint32_t count = ((size - 1) >> (vol_->clusterSizeShift_ + 9)) + 1;
+
+ // allocate clusters
+ if (!vol_->allocContiguous(count, &firstCluster_)) {
+ remove();
+ return false;
+ }
+ fileSize_ = size;
+
+ // insure sync() will update dir entry
+ flags_ |= F_FILE_DIR_DIRTY;
+ return sync();
+}
+//------------------------------------------------------------------------------
+/**
+ * Return a files directory entry
+ *
+ * \param[out] dir Location for return of the files directory entry.
+ *
+ * \return The value one, true, is returned for success and
+ * the value zero, false, is returned for failure.
+ */
+uint8_t SdFile::dirEntry(dir_t* dir) {
+ // make sure fields on SD are correct
+ if (!sync()) return false;
+
+ // read entry
+ dir_t* p = cacheDirEntry(SdVolume::CACHE_FOR_READ);
+ if (!p) return false;
+
+ // copy to caller's struct
+ memcpy(dir, p, sizeof(dir_t));
+ return true;
+}
+//------------------------------------------------------------------------------
+/**
+ * Format the name field of \a dir into the 13 byte array
+ * \a name in standard 8.3 short name format.
+ *
+ * \param[in] dir The directory structure containing the name.
+ * \param[out] name A 13 byte char array for the formatted name.
+ */
+void SdFile::dirName(const dir_t& dir, char* name) {
+ uint8_t j = 0;
+ for (uint8_t i = 0; i < 11; i++) {
+ if (dir.name[i] == ' ')continue;
+ if (i == 8) name[j++] = '.';
+ name[j++] = dir.name[i];
+ }
+ name[j] = 0;
+}
+//------------------------------------------------------------------------------
+/** List directory contents to Serial.
+ *
+ * \param[in] flags The inclusive OR of
+ *
+ * LS_DATE - %Print file modification date
+ *
+ * LS_SIZE - %Print file size.
+ *
+ * LS_R - Recursive list of subdirectories.
+ *
+ * \param[in] indent Amount of space before file name. Used for recursive
+ * list to indicate subdirectory level.
+ */
+void SdFile::ls(uint8_t flags, uint8_t indent) {
+ dir_t* p;
+
+ rewind();
+ while ((p = readDirCache())) {
+ // done if past last used entry
+ if (p->name[0] == DIR_NAME_FREE) break;
+
+ // skip deleted entry and entries for . and ..
+ if (p->name[0] == DIR_NAME_DELETED || p->name[0] == '.') continue;
+
+ // only list subdirectories and files
+ if (!DIR_IS_FILE_OR_SUBDIR(p)) continue;
+
+ // print any indent spaces
+ for (int8_t i = 0; i < indent; i++) Serial.print(' ');
+
+ // print file name with possible blank fill
+ printDirName(*p, flags & (LS_DATE | LS_SIZE) ? 14 : 0);
+
+ // print modify date/time if requested
+ if (flags & LS_DATE) {
+ printFatDate(p->lastWriteDate);
+ Serial.print(' ');
+ printFatTime(p->lastWriteTime);
+ }
+ // print size if requested
+ if (!DIR_IS_SUBDIR(p) && (flags & LS_SIZE)) {
+ Serial.print(' ');
+ Serial.print(p->fileSize);
+ }
+ Serial.println();
+
+ // list subdirectory content if requested
+ if ((flags & LS_R) && DIR_IS_SUBDIR(p)) {
+ uint16_t index = curPosition()/32 - 1;
+ SdFile s;
+ if (s.open(this, index, O_READ)) s.ls(flags, indent + 2);
+ seekSet(32 * (index + 1));
+ }
+ }
+}
+//------------------------------------------------------------------------------
+// format directory name field from a 8.3 name string
+uint8_t SdFile::make83Name(const char* str, uint8_t* name) {
+ uint8_t c;
+ uint8_t n = 7; // max index for part before dot
+ uint8_t i = 0;
+ // blank fill name and extension
+ while (i < 11) name[i++] = ' ';
+ i = 0;
+ while ((c = *str++) != '\0') {
+ if (c == '.') {
+ if (n == 10) return false; // only one dot allowed
+ n = 10; // max index for full 8.3 name
+ i = 8; // place for extension
+ } else {
+ // illegal FAT characters
+ PGM_P p = PSTR("|<>^+=?/[];,*\"\\");
+ uint8_t b;
+ while ((b = pgm_read_byte(p++))) if (b == c) return false;
+ // check size and only allow ASCII printable characters
+ if (i > n || c < 0X21 || c > 0X7E)return false;
+ // only upper case allowed in 8.3 names - convert lower to upper
+ name[i++] = c < 'a' || c > 'z' ? c : c + ('A' - 'a');
+ }
+ }
+ // must have a file name, extension is optional
+ return name[0] != ' ';
+}
+//------------------------------------------------------------------------------
+/** Make a new directory.
+ *
+ * \param[in] dir An open SdFat instance for the directory that will containing
+ * the new directory.
+ *
+ * \param[in] dirName A valid 8.3 DOS name for the new directory.
+ *
+ * \return The value one, true, is returned for success and
+ * the value zero, false, is returned for failure.
+ * Reasons for failure include this SdFile is already open, \a dir is not a
+ * directory, \a dirName is invalid or already exists in \a dir.
+ */
+uint8_t SdFile::makeDir(SdFile* dir, const char* dirName) {
+ dir_t d;
+
+ // create a normal file
+ if (!open(dir, dirName, O_CREAT | O_EXCL | O_RDWR)) return false;
+
+ // convert SdFile to directory
+ flags_ = O_READ;
+ type_ = FAT_FILE_TYPE_SUBDIR;
+
+ // allocate and zero first cluster
+ if (!addDirCluster())return false;
+
+ // force entry to SD
+ if (!sync()) return false;
+
+ // cache entry - should already be in cache due to sync() call
+ dir_t* p = cacheDirEntry(SdVolume::CACHE_FOR_WRITE);
+ if (!p) return false;
+
+ // change directory entry attribute
+ p->attributes = DIR_ATT_DIRECTORY;
+
+ // make entry for '.'
+ memcpy(&d, p, sizeof(d));
+ for (uint8_t i = 1; i < 11; i++) d.name[i] = ' ';
+ d.name[0] = '.';
+
+ // cache block for '.' and '..'
+ uint32_t block = vol_->clusterStartBlock(firstCluster_);
+ if (!SdVolume::cacheRawBlock(block, SdVolume::CACHE_FOR_WRITE)) return false;
+
+ // copy '.' to block
+ memcpy(&SdVolume::cacheBuffer_.dir[0], &d, sizeof(d));
+
+ // make entry for '..'
+ d.name[1] = '.';
+ if (dir->isRoot()) {
+ d.firstClusterLow = 0;
+ d.firstClusterHigh = 0;
+ } else {
+ d.firstClusterLow = dir->firstCluster_ & 0XFFFF;
+ d.firstClusterHigh = dir->firstCluster_ >> 16;
+ }
+ // copy '..' to block
+ memcpy(&SdVolume::cacheBuffer_.dir[1], &d, sizeof(d));
+
+ // set position after '..'
+ curPosition_ = 2 * sizeof(d);
+
+ // write first block
+ return SdVolume::cacheFlush();
+}
+//------------------------------------------------------------------------------
+/**
+ * Open a file or directory by name.
+ *
+ * \param[in] dirFile An open SdFat instance for the directory containing the
+ * file to be opened.
+ *
+ * \param[in] fileName A valid 8.3 DOS name for a file to be opened.
+ *
+ * \param[in] oflag Values for \a oflag are constructed by a bitwise-inclusive
+ * OR of flags from the following list
+ *
+ * O_READ - Open for reading.
+ *
+ * O_RDONLY - Same as O_READ.
+ *
+ * O_WRITE - Open for writing.
+ *
+ * O_WRONLY - Same as O_WRITE.
+ *
+ * O_RDWR - Open for reading and writing.
+ *
+ * O_APPEND - If set, the file offset shall be set to the end of the
+ * file prior to each write.
+ *
+ * O_CREAT - If the file exists, this flag has no effect except as noted
+ * under O_EXCL below. Otherwise, the file shall be created
+ *
+ * O_EXCL - If O_CREAT and O_EXCL are set, open() shall fail if the file exists.
+ *
+ * O_SYNC - Call sync() after each write. This flag should not be used with
+ * write(uint8_t), write_P(PGM_P), writeln_P(PGM_P), or the Arduino Print class.
+ * These functions do character at a time writes so sync() will be called
+ * after each byte.
+ *
+ * O_TRUNC - If the file exists and is a regular file, and the file is
+ * successfully opened and is not read only, its length shall be truncated to 0.
+ *
+ * \note Directory files must be opened read only. Write and truncation is
+ * not allowed for directory files.
+ *
+ * \return The value one, true, is returned for success and
+ * the value zero, false, is returned for failure.
+ * Reasons for failure include this SdFile is already open, \a difFile is not
+ * a directory, \a fileName is invalid, the file does not exist
+ * or can't be opened in the access mode specified by oflag.
+ */
+uint8_t SdFile::open(SdFile* dirFile, const char* fileName, uint8_t oflag) {
+ uint8_t dname[11];
+ dir_t* p;
+
+ // error if already open
+ if (isOpen())return false;
+
+ if (!make83Name(fileName, dname)) return false;
+ vol_ = dirFile->vol_;
+ dirFile->rewind();
+
+ // bool for empty entry found
+ uint8_t emptyFound = false;
+
+ // search for file
+ while (dirFile->curPosition_ < dirFile->fileSize_) {
+ uint8_t index = 0XF & (dirFile->curPosition_ >> 5);
+ p = dirFile->readDirCache();
+ if (p == NULL) return false;
+
+ if (p->name[0] == DIR_NAME_FREE || p->name[0] == DIR_NAME_DELETED) {
+ // remember first empty slot
+ if (!emptyFound) {
+ emptyFound = true;
+ dirIndex_ = index;
+ dirBlock_ = SdVolume::cacheBlockNumber_;
+ }
+ // done if no entries follow
+ if (p->name[0] == DIR_NAME_FREE) break;
+ } else if (!memcmp(dname, p->name, 11)) {
+ // don't open existing file if O_CREAT and O_EXCL
+ if ((oflag & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) return false;
+
+ // open found file
+ return openCachedEntry(0XF & index, oflag);
+ }
+ }
+ // only create file if O_CREAT and O_WRITE
+ if ((oflag & (O_CREAT | O_WRITE)) != (O_CREAT | O_WRITE)) return false;
+
+ // cache found slot or add cluster if end of file
+ if (emptyFound) {
+ p = cacheDirEntry(SdVolume::CACHE_FOR_WRITE);
+ if (!p) return false;
+ } else {
+ if (dirFile->type_ == FAT_FILE_TYPE_ROOT16) return false;
+
+ // add and zero cluster for dirFile - first cluster is in cache for write
+ if (!dirFile->addDirCluster()) return false;
+
+ // use first entry in cluster
+ dirIndex_ = 0;
+ p = SdVolume::cacheBuffer_.dir;
+ }
+ // initialize as empty file
+ memset(p, 0, sizeof(dir_t));
+ memcpy(p->name, dname, 11);
+
+ // set timestamps
+ if (dateTime_) {
+ // call user function
+ dateTime_(&p->creationDate, &p->creationTime);
+ } else {
+ // use default date/time
+ p->creationDate = FAT_DEFAULT_DATE;
+ p->creationTime = FAT_DEFAULT_TIME;
+ }
+ p->lastAccessDate = p->creationDate;
+ p->lastWriteDate = p->creationDate;
+ p->lastWriteTime = p->creationTime;
+
+ // force write of entry to SD
+ if (!SdVolume::cacheFlush()) return false;
+
+ // open entry in cache
+ return openCachedEntry(dirIndex_, oflag);
+}
+//------------------------------------------------------------------------------
+/**
+ * Open a file by index.
+ *
+ * \param[in] dirFile An open SdFat instance for the directory.
+ *
+ * \param[in] index The \a index of the directory entry for the file to be
+ * opened. The value for \a index is (directory file position)/32.
+ *
+ * \param[in] oflag Values for \a oflag are constructed by a bitwise-inclusive
+ * OR of flags O_READ, O_WRITE, O_TRUNC, and O_SYNC.
+ *
+ * See open() by fileName for definition of flags and return values.
+ *
+ */
+uint8_t SdFile::open(SdFile* dirFile, uint16_t index, uint8_t oflag) {
+ // error if already open
+ if (isOpen())return false;
+
+ // don't open existing file if O_CREAT and O_EXCL - user call error
+ if ((oflag & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) return false;
+
+ vol_ = dirFile->vol_;
+
+ // seek to location of entry
+ if (!dirFile->seekSet(32 * index)) return false;
+
+ // read entry into cache
+ dir_t* p = dirFile->readDirCache();
+ if (p == NULL) return false;
+
+ // error if empty slot or '.' or '..'
+ if (p->name[0] == DIR_NAME_FREE ||
+ p->name[0] == DIR_NAME_DELETED || p->name[0] == '.') {
+ return false;
+ }
+ // open cached entry
+ return openCachedEntry(index & 0XF, oflag);
+}
+//------------------------------------------------------------------------------
+// open a cached directory entry. Assumes vol_ is initializes
+uint8_t SdFile::openCachedEntry(uint8_t dirIndex, uint8_t oflag) {
+ // location of entry in cache
+ dir_t* p = SdVolume::cacheBuffer_.dir + dirIndex;
+
+ // write or truncate is an error for a directory or read-only file
+ if (p->attributes & (DIR_ATT_READ_ONLY | DIR_ATT_DIRECTORY)) {
+ if (oflag & (O_WRITE | O_TRUNC)) return false;
+ }
+ // remember location of directory entry on SD
+ dirIndex_ = dirIndex;
+ dirBlock_ = SdVolume::cacheBlockNumber_;
+
+ // copy first cluster number for directory fields
+ firstCluster_ = (uint32_t)p->firstClusterHigh << 16;
+ firstCluster_ |= p->firstClusterLow;
+
+ // make sure it is a normal file or subdirectory
+ if (DIR_IS_FILE(p)) {
+ fileSize_ = p->fileSize;
+ type_ = FAT_FILE_TYPE_NORMAL;
+ } else if (DIR_IS_SUBDIR(p)) {
+ if (!vol_->chainSize(firstCluster_, &fileSize_)) return false;
+ type_ = FAT_FILE_TYPE_SUBDIR;
+ } else {
+ return false;
+ }
+ // save open flags for read/write
+ flags_ = oflag & (O_ACCMODE | O_SYNC | O_APPEND);
+
+ // set to start of file
+ curCluster_ = 0;
+ curPosition_ = 0;
+
+ // truncate file to zero length if requested
+ if (oflag & O_TRUNC) return truncate(0);
+ return true;
+}
+//------------------------------------------------------------------------------
+/**
+ * Open a volume's root directory.
+ *
+ * \param[in] vol The FAT volume containing the root directory to be opened.
+ *
+ * \return The value one, true, is returned for success and
+ * the value zero, false, is returned for failure.
+ * Reasons for failure include the FAT volume has not been initialized
+ * or it a FAT12 volume.
+ */
+uint8_t SdFile::openRoot(SdVolume* vol) {
+ // error if file is already open
+ if (isOpen()) return false;
+
+ if (vol->fatType() == 16) {
+ type_ = FAT_FILE_TYPE_ROOT16;
+ firstCluster_ = 0;
+ fileSize_ = 32 * vol->rootDirEntryCount();
+ } else if (vol->fatType() == 32) {
+ type_ = FAT_FILE_TYPE_ROOT32;
+ firstCluster_ = vol->rootDirStart();
+ if (!vol->chainSize(firstCluster_, &fileSize_)) return false;
+ } else {
+ // volume is not initialized or FAT12
+ return false;
+ }
+ vol_ = vol;
+ // read only
+ flags_ = O_READ;
+
+ // set to start of file
+ curCluster_ = 0;
+ curPosition_ = 0;
+
+ // root has no directory entry
+ dirBlock_ = 0;
+ dirIndex_ = 0;
+ return true;
+}
+//------------------------------------------------------------------------------
+/** %Print the name field of a directory entry in 8.3 format to Serial.
+ *
+ * \param[in] dir The directory structure containing the name.
+ * \param[in] width Blank fill name if length is less than \a width.
+ */
+void SdFile::printDirName(const dir_t& dir, uint8_t width) {
+ uint8_t w = 0;
+ for (uint8_t i = 0; i < 11; i++) {
+ if (dir.name[i] == ' ')continue;
+ if (i == 8) {
+ Serial.print('.');
+ w++;
+ }
+ Serial.write(dir.name[i]);
+ w++;
+ }
+ if (DIR_IS_SUBDIR(&dir)) {
+ Serial.print('/');
+ w++;
+ }
+ while (w < width) {
+ Serial.print(' ');
+ w++;
+ }
+}
+//------------------------------------------------------------------------------
+/** %Print a directory date field to Serial.
+ *
+ * Format is yyyy-mm-dd.
+ *
+ * \param[in] fatDate The date field from a directory entry.
+ */
+void SdFile::printFatDate(uint16_t fatDate) {
+ Serial.print(FAT_YEAR(fatDate));
+ Serial.print('-');
+ printTwoDigits(FAT_MONTH(fatDate));
+ Serial.print('-');
+ printTwoDigits(FAT_DAY(fatDate));
+}
+//------------------------------------------------------------------------------
+/** %Print a directory time field to Serial.
+ *
+ * Format is hh:mm:ss.
+ *
+ * \param[in] fatTime The time field from a directory entry.
+ */
+void SdFile::printFatTime(uint16_t fatTime) {
+ printTwoDigits(FAT_HOUR(fatTime));
+ Serial.print(':');
+ printTwoDigits(FAT_MINUTE(fatTime));
+ Serial.print(':');
+ printTwoDigits(FAT_SECOND(fatTime));
+}
+//------------------------------------------------------------------------------
+/** %Print a value as two digits to Serial.
+ *
+ * \param[in] v Value to be printed, 0 <= \a v <= 99
+ */
+void SdFile::printTwoDigits(uint8_t v) {
+ char str[3];
+ str[0] = '0' + v/10;
+ str[1] = '0' + v % 10;
+ str[2] = 0;
+ Serial.print(str);
+}
+//------------------------------------------------------------------------------
+/**
+ * Read data from a file starting at the current position.
+ *
+ * \param[out] buf Pointer to the location that will receive the data.
+ *
+ * \param[in] nbyte Maximum number of bytes to read.
+ *
+ * \return For success read() returns the number of bytes read.
+ * A value less than \a nbyte, including zero, will be returned
+ * if end of file is reached.
+ * If an error occurs, read() returns -1. Possible errors include
+ * read() called before a file has been opened, corrupt file system
+ * or an I/O error occurred.
+ */
+int16_t SdFile::read(void* buf, uint16_t nbyte) {
+ uint8_t* dst = reinterpret_cast<uint8_t*>(buf);
+
+ // error if not open or write only
+ if (!isOpen() || !(flags_ & O_READ)) return -1;
+
+ // max bytes left in file
+ if (nbyte > (fileSize_ - curPosition_)) nbyte = fileSize_ - curPosition_;
+
+ // amount left to read
+ uint16_t toRead = nbyte;
+ while (toRead > 0) {
+ uint32_t block; // raw device block number
+ uint16_t offset = curPosition_ & 0X1FF; // offset in block
+ if (type_ == FAT_FILE_TYPE_ROOT16) {
+ block = vol_->rootDirStart() + (curPosition_ >> 9);
+ } else {
+ uint8_t blockOfCluster = vol_->blockOfCluster(curPosition_);
+ if (offset == 0 && blockOfCluster == 0) {
+ // start of new cluster
+ if (curPosition_ == 0) {
+ // use first cluster in file
+ curCluster_ = firstCluster_;
+ } else {
+ // get next cluster from FAT
+ if (!vol_->fatGet(curCluster_, &curCluster_)) return -1;
+ }
+ }
+ block = vol_->clusterStartBlock(curCluster_) + blockOfCluster;
+ }
+ uint16_t n = toRead;
+
+ // amount to be read from current block
+ if (n > (512 - offset)) n = 512 - offset;
+
+ // no buffering needed if n == 512 or user requests no buffering
+ if ((unbufferedRead() || n == 512) &&
+ block != SdVolume::cacheBlockNumber_) {
+ if (!vol_->readData(block, offset, n, dst)) return -1;
+ dst += n;
+ } else {
+ // read block to cache and copy data to caller
+ if (!SdVolume::cacheRawBlock(block, SdVolume::CACHE_FOR_READ)) return -1;
+ uint8_t* src = SdVolume::cacheBuffer_.data + offset;
+ uint8_t* end = src + n;
+ while (src != end) *dst++ = *src++;
+ }
+ curPosition_ += n;
+ toRead -= n;
+ }
+ return nbyte;
+}
+//------------------------------------------------------------------------------
+/**
+ * Read the next directory entry from a directory file.
+ *
+ * \param[out] dir The dir_t struct that will receive the data.
+ *
+ * \return For success readDir() returns the number of bytes read.
+ * A value of zero will be returned if end of file is reached.
+ * If an error occurs, readDir() returns -1. Possible errors include
+ * readDir() called before a directory has been opened, this is not
+ * a directory file or an I/O error occurred.
+ */
+int8_t SdFile::readDir(dir_t* dir) {
+ int8_t n;
+ // if not a directory file or miss-positioned return an error
+ if (!isDir() || (0X1F & curPosition_)) return -1;
+
+ while ((n = read(dir, sizeof(dir_t))) == sizeof(dir_t)) {
+ // last entry if DIR_NAME_FREE
+ if (dir->name[0] == DIR_NAME_FREE) break;
+ // skip empty entries and entry for . and ..
+ if (dir->name[0] == DIR_NAME_DELETED || dir->name[0] == '.') continue;
+ // return if normal file or subdirectory
+ if (DIR_IS_FILE_OR_SUBDIR(dir)) return n;
+ }
+ // error, end of file, or past last entry
+ return n < 0 ? -1 : 0;
+}
+//------------------------------------------------------------------------------
+// Read next directory entry into the cache
+// Assumes file is correctly positioned
+dir_t* SdFile::readDirCache(void) {
+ // error if not directory
+ if (!isDir()) return NULL;
+
+ // index of entry in cache
+ uint8_t i = (curPosition_ >> 5) & 0XF;
+
+ // use read to locate and cache block
+ if (read() < 0) return NULL;
+
+ // advance to next entry
+ curPosition_ += 31;
+
+ // return pointer to entry
+ return (SdVolume::cacheBuffer_.dir + i);
+}
+//------------------------------------------------------------------------------
+/**
+ * Remove a file.
+ *
+ * The directory entry and all data for the file are deleted.
+ *
+ * \note This function should not be used to delete the 8.3 version of a
+ * file that has a long name. For example if a file has the long name
+ * "New Text Document.txt" you should not delete the 8.3 name "NEWTEX~1.TXT".
+ *
+ * \return The value one, true, is returned for success and
+ * the value zero, false, is returned for failure.
+ * Reasons for failure include the file read-only, is a directory,
+ * or an I/O error occurred.
+ */
+uint8_t SdFile::remove(void) {
+ // free any clusters - will fail if read-only or directory
+ if (!truncate(0)) return false;
+
+ // cache directory entry
+ dir_t* d = cacheDirEntry(SdVolume::CACHE_FOR_WRITE);
+ if (!d) return false;
+
+ // mark entry deleted
+ d->name[0] = DIR_NAME_DELETED;
+
+ // set this SdFile closed
+ type_ = FAT_FILE_TYPE_CLOSED;
+
+ // write entry to SD
+ return SdVolume::cacheFlush();
+}
+//------------------------------------------------------------------------------
+/**
+ * Remove a file.
+ *
+ * The directory entry and all data for the file are deleted.
+ *
+ * \param[in] dirFile The directory that contains the file.
+ * \param[in] fileName The name of the file to be removed.
+ *
+ * \note This function should not be used to delete the 8.3 version of a
+ * file that has a long name. For example if a file has the long name
+ * "New Text Document.txt" you should not delete the 8.3 name "NEWTEX~1.TXT".
+ *
+ * \return The value one, true, is returned for success and
+ * the value zero, false, is returned for failure.
+ * Reasons for failure include the file is a directory, is read only,
+ * \a dirFile is not a directory, \a fileName is not found
+ * or an I/O error occurred.
+ */
+uint8_t SdFile::remove(SdFile* dirFile, const char* fileName) {
+ SdFile file;
+ if (!file.open(dirFile, fileName, O_WRITE)) return false;
+ return file.remove();
+}
+//------------------------------------------------------------------------------
+/** Remove a directory file.
+ *
+ * The directory file will be removed only if it is empty and is not the
+ * root directory. rmDir() follows DOS and Windows and ignores the
+ * read-only attribute for the directory.
+ *
+ * \note This function should not be used to delete the 8.3 version of a
+ * directory that has a long name. For example if a directory has the
+ * long name "New folder" you should not delete the 8.3 name "NEWFOL~1".
+ *
+ * \return The value one, true, is returned for success and
+ * the value zero, false, is returned for failure.
+ * Reasons for failure include the file is not a directory, is the root
+ * directory, is not empty, or an I/O error occurred.
+ */
+uint8_t SdFile::rmDir(void) {
+ // must be open subdirectory
+ if (!isSubDir()) return false;
+
+ rewind();
+
+ // make sure directory is empty
+ while (curPosition_ < fileSize_) {
+ dir_t* p = readDirCache();
+ if (p == NULL) return false;
+ // done if past last used entry
+ if (p->name[0] == DIR_NAME_FREE) break;
+ // skip empty slot or '.' or '..'
+ if (p->name[0] == DIR_NAME_DELETED || p->name[0] == '.') continue;
+ // error not empty
+ if (DIR_IS_FILE_OR_SUBDIR(p)) return false;
+ }
+ // convert empty directory to normal file for remove
+ type_ = FAT_FILE_TYPE_NORMAL;
+ flags_ |= O_WRITE;
+ return remove();
+}
+//------------------------------------------------------------------------------
+/** Recursively delete a directory and all contained files.
+ *
+ * This is like the Unix/Linux 'rm -rf *' if called with the root directory
+ * hence the name.
+ *
+ * Warning - This will remove all contents of the directory including
+ * subdirectories. The directory will then be removed if it is not root.
+ * The read-only attribute for files will be ignored.
+ *
+ * \note This function should not be used to delete the 8.3 version of
+ * a directory that has a long name. See remove() and rmDir().
+ *
+ * \return The value one, true, is returned for success and
+ * the value zero, false, is returned for failure.
+ */
+uint8_t SdFile::rmRfStar(void) {
+ rewind();
+ while (curPosition_ < fileSize_) {
+ SdFile f;
+
+ // remember position
+ uint16_t index = curPosition_/32;
+
+ dir_t* p = readDirCache();
+ if (!p) return false;
+
+ // done if past last entry
+ if (p->name[0] == DIR_NAME_FREE) break;
+
+ // skip empty slot or '.' or '..'
+ if (p->name[0] == DIR_NAME_DELETED || p->name[0] == '.') continue;
+
+ // skip if part of long file name or volume label in root
+ if (!DIR_IS_FILE_OR_SUBDIR(p)) continue;
+
+ if (!f.open(this, index, O_READ)) return false;
+ if (f.isSubDir()) {
+ // recursively delete
+ if (!f.rmRfStar()) return false;
+ } else {
+ // ignore read-only
+ f.flags_ |= O_WRITE;
+ if (!f.remove()) return false;
+ }
+ // position to next entry if required
+ if (curPosition_ != (32*(index + 1))) {
+ if (!seekSet(32*(index + 1))) return false;
+ }
+ }
+ // don't try to delete root
+ if (isRoot()) return true;
+ return rmDir();
+}
+//------------------------------------------------------------------------------
+/**
+ * Sets a file's position.
+ *
+ * \param[in] pos The new position in bytes from the beginning of the file.
+ *
+ * \return The value one, true, is returned for success and
+ * the value zero, false, is returned for failure.
+ */
+uint8_t SdFile::seekSet(uint32_t pos) {
+ // error if file not open or seek past end of file
+ if (!isOpen() || pos > fileSize_) return false;
+
+ if (type_ == FAT_FILE_TYPE_ROOT16) {
+ curPosition_ = pos;
+ return true;
+ }
+ if (pos == 0) {
+ // set position to start of file
+ curCluster_ = 0;
+ curPosition_ = 0;
+ return true;
+ }
+ // calculate cluster index for cur and new position
+ uint32_t nCur = (curPosition_ - 1) >> (vol_->clusterSizeShift_ + 9);
+ uint32_t nNew = (pos - 1) >> (vol_->clusterSizeShift_ + 9);
+
+ if (nNew < nCur || curPosition_ == 0) {
+ // must follow chain from first cluster
+ curCluster_ = firstCluster_;
+ } else {
+ // advance from curPosition
+ nNew -= nCur;
+ }
+ while (nNew--) {
+ if (!vol_->fatGet(curCluster_, &curCluster_)) return false;
+ }
+ curPosition_ = pos;
+ return true;
+}
+//------------------------------------------------------------------------------
+/**
+ * The sync() call causes all modified data and directory fields
+ * to be written to the storage device.
+ *
+ * \return The value one, true, is returned for success and
+ * the value zero, false, is returned for failure.
+ * Reasons for failure include a call to sync() before a file has been
+ * opened or an I/O error.
+ */
+uint8_t SdFile::sync(void) {
+ // only allow open files and directories
+ if (!isOpen()) return false;
+
+ if (flags_ & F_FILE_DIR_DIRTY) {
+ dir_t* d = cacheDirEntry(SdVolume::CACHE_FOR_WRITE);
+ if (!d) return false;
+
+ // do not set filesize for dir files
+ if (!isDir()) d->fileSize = fileSize_;
+
+ // update first cluster fields
+ d->firstClusterLow = firstCluster_ & 0XFFFF;
+ d->firstClusterHigh = firstCluster_ >> 16;
+
+ // set modify time if user supplied a callback date/time function
+ if (dateTime_) {
+ dateTime_(&d->lastWriteDate, &d->lastWriteTime);
+ d->lastAccessDate = d->lastWriteDate;
+ }
+ // clear directory dirty
+ flags_ &= ~F_FILE_DIR_DIRTY;
+ }
+ return SdVolume::cacheFlush();
+}
+//------------------------------------------------------------------------------
+/**
+ * Set a file's timestamps in its directory entry.
+ *
+ * \param[in] flags Values for \a flags are constructed by a bitwise-inclusive
+ * OR of flags from the following list
+ *
+ * T_ACCESS - Set the file's last access date.
+ *
+ * T_CREATE - Set the file's creation date and time.
+ *
+ * T_WRITE - Set the file's last write/modification date and time.
+ *
+ * \param[in] year Valid range 1980 - 2107 inclusive.
+ *
+ * \param[in] month Valid range 1 - 12 inclusive.
+ *
+ * \param[in] day Valid range 1 - 31 inclusive.
+ *
+ * \param[in] hour Valid range 0 - 23 inclusive.
+ *
+ * \param[in] minute Valid range 0 - 59 inclusive.
+ *
+ * \param[in] second Valid range 0 - 59 inclusive
+ *
+ * \note It is possible to set an invalid date since there is no check for
+ * the number of days in a month.
+ *
+ * \note
+ * Modify and access timestamps may be overwritten if a date time callback
+ * function has been set by dateTimeCallback().
+ *
+ * \return The value one, true, is returned for success and
+ * the value zero, false, is returned for failure.
+ */
+uint8_t SdFile::timestamp(uint8_t flags, uint16_t year, uint8_t month,
+ uint8_t day, uint8_t hour, uint8_t minute, uint8_t second) {
+ if (!isOpen()
+ || year < 1980
+ || year > 2107
+ || month < 1
+ || month > 12
+ || day < 1
+ || day > 31
+ || hour > 23
+ || minute > 59
+ || second > 59) {
+ return false;
+ }
+ dir_t* d = cacheDirEntry(SdVolume::CACHE_FOR_WRITE);
+ if (!d) return false;
+
+ uint16_t dirDate = FAT_DATE(year, month, day);
+ uint16_t dirTime = FAT_TIME(hour, minute, second);
+ if (flags & T_ACCESS) {
+ d->lastAccessDate = dirDate;
+ }
+ if (flags & T_CREATE) {
+ d->creationDate = dirDate;
+ d->creationTime = dirTime;
+ // seems to be units of 1/100 second not 1/10 as Microsoft states
+ d->creationTimeTenths = second & 1 ? 100 : 0;
+ }
+ if (flags & T_WRITE) {
+ d->lastWriteDate = dirDate;
+ d->lastWriteTime = dirTime;
+ }
+ SdVolume::cacheSetDirty();
+ return sync();
+}
+//------------------------------------------------------------------------------
+/**
+ * Truncate a file to a specified length. The current file position
+ * will be maintained if it is less than or equal to \a length otherwise
+ * it will be set to end of file.
+ *
+ * \param[in] length The desired length for the file.
+ *
+ * \return The value one, true, is returned for success and
+ * the value zero, false, is returned for failure.
+ * Reasons for failure include file is read only, file is a directory,
+ * \a length is greater than the current file size or an I/O error occurs.
+ */
+uint8_t SdFile::truncate(uint32_t length) {
+// error if not a normal file or read-only
+ if (!isFile() || !(flags_ & O_WRITE)) return false;
+
+ // error if length is greater than current size
+ if (length > fileSize_) return false;
+
+ // fileSize and length are zero - nothing to do
+ if (fileSize_ == 0) return true;
+
+ // remember position for seek after truncation
+ uint32_t newPos = curPosition_ > length ? length : curPosition_;
+
+ // position to last cluster in truncated file
+ if (!seekSet(length)) return false;
+
+ if (length == 0) {
+ // free all clusters
+ if (!vol_->freeChain(firstCluster_)) return false;
+ firstCluster_ = 0;
+ } else {
+ uint32_t toFree;
+ if (!vol_->fatGet(curCluster_, &toFree)) return false;
+
+ if (!vol_->isEOC(toFree)) {
+ // free extra clusters
+ if (!vol_->freeChain(toFree)) return false;
+
+ // current cluster is end of chain
+ if (!vol_->fatPutEOC(curCluster_)) return false;
+ }
+ }
+ fileSize_ = length;
+
+ // need to update directory entry
+ flags_ |= F_FILE_DIR_DIRTY;
+
+ if (!sync()) return false;
+
+ // set file to correct position
+ return seekSet(newPos);
+}
+//------------------------------------------------------------------------------
+/**
+ * Write data to an open file.
+ *
+ * \note Data is moved to the cache but may not be written to the
+ * storage device until sync() is called.
+ *
+ * \param[in] buf Pointer to the location of the data to be written.
+ *
+ * \param[in] nbyte Number of bytes to write.
+ *
+ * \return For success write() returns the number of bytes written, always
+ * \a nbyte. If an error occurs, write() returns -1. Possible errors
+ * include write() is called before a file has been opened, write is called
+ * for a read-only file, device is full, a corrupt file system or an I/O error.
+ *
+ */
+size_t SdFile::write(const void* buf, uint16_t nbyte) {
+ // convert void* to uint8_t* - must be before goto statements
+ const uint8_t* src = reinterpret_cast<const uint8_t*>(buf);
+
+ // number of bytes left to write - must be before goto statements
+ uint16_t nToWrite = nbyte;
+
+ // error if not a normal file or is read-only
+ if (!isFile() || !(flags_ & O_WRITE)) goto writeErrorReturn;
+
+ // seek to end of file if append flag
+ if ((flags_ & O_APPEND) && curPosition_ != fileSize_) {
+ if (!seekEnd()) goto writeErrorReturn;
+ }
+
+ while (nToWrite > 0) {
+ uint8_t blockOfCluster = vol_->blockOfCluster(curPosition_);
+ uint16_t blockOffset = curPosition_ & 0X1FF;
+ if (blockOfCluster == 0 && blockOffset == 0) {
+ // start of new cluster
+ if (curCluster_ == 0) {
+ if (firstCluster_ == 0) {
+ // allocate first cluster of file
+ if (!addCluster()) goto writeErrorReturn;
+ } else {
+ curCluster_ = firstCluster_;
+ }
+ } else {
+ uint32_t next;
+ if (!vol_->fatGet(curCluster_, &next)) return false;
+ if (vol_->isEOC(next)) {
+ // add cluster if at end of chain
+ if (!addCluster()) goto writeErrorReturn;
+ } else {
+ curCluster_ = next;
+ }
+ }
+ }
+ // max space in block
+ uint16_t n = 512 - blockOffset;
+
+ // lesser of space and amount to write
+ if (n > nToWrite) n = nToWrite;
+
+ // block for data write
+ uint32_t block = vol_->clusterStartBlock(curCluster_) + blockOfCluster;
+ if (n == 512) {
+ // full block - don't need to use cache
+ // invalidate cache if block is in cache
+ if (SdVolume::cacheBlockNumber_ == block) {
+ SdVolume::cacheBlockNumber_ = 0XFFFFFFFF;
+ }
+ if (!vol_->writeBlock(block, src)) goto writeErrorReturn;
+ src += 512;
+ } else {
+ if (blockOffset == 0 && curPosition_ >= fileSize_) {
+ // start of new block don't need to read into cache
+ if (!SdVolume::cacheFlush()) goto writeErrorReturn;
+ SdVolume::cacheBlockNumber_ = block;
+ SdVolume::cacheSetDirty();
+ } else {
+ // rewrite part of block
+ if (!SdVolume::cacheRawBlock(block, SdVolume::CACHE_FOR_WRITE)) {
+ goto writeErrorReturn;
+ }
+ }
+ uint8_t* dst = SdVolume::cacheBuffer_.data + blockOffset;
+ uint8_t* end = dst + n;
+ while (dst != end) *dst++ = *src++;
+ }
+ nToWrite -= n;
+ curPosition_ += n;
+ }
+ if (curPosition_ > fileSize_) {
+ // update fileSize and insure sync will update dir entry
+ fileSize_ = curPosition_;
+ flags_ |= F_FILE_DIR_DIRTY;
+ } else if (dateTime_ && nbyte) {
+ // insure sync will update modified date and time
+ flags_ |= F_FILE_DIR_DIRTY;
+ }
+
+ if (flags_ & O_SYNC) {
+ if (!sync()) goto writeErrorReturn;
+ }
+ return nbyte;
+
+ writeErrorReturn:
+ // return for write error
+ //writeError = true;
+ setWriteError();
+ return 0;
+}
+//------------------------------------------------------------------------------
+/**
+ * Write a byte to a file. Required by the Arduino Print class.
+ *
+ * Use SdFile::writeError to check for errors.
+ */
+size_t SdFile::write(uint8_t b) {
+ return write(&b, 1);
+}
+//------------------------------------------------------------------------------
+/**
+ * Write a string to a file. Used by the Arduino Print class.
+ *
+ * Use SdFile::writeError to check for errors.
+ */
+size_t SdFile::write(const char* str) {
+ return write(str, strlen(str));
+}
+//------------------------------------------------------------------------------
+/**
+ * Write a PROGMEM string to a file.
+ *
+ * Use SdFile::writeError to check for errors.
+ */
+void SdFile::write_P(PGM_P str) {
+ for (uint8_t c; (c = pgm_read_byte(str)); str++) write(c);
+}
+//------------------------------------------------------------------------------
+/**
+ * Write a PROGMEM string followed by CR/LF to a file.
+ *
+ * Use SdFile::writeError to check for errors.
+ */
+void SdFile::writeln_P(PGM_P str) {
+ write_P(str);
+ println();
+}
diff --git a/libraries/SD/utility/SdInfo.h b/libraries/SD/utility/SdInfo.h new file mode 100644 index 0000000..acde74d --- /dev/null +++ b/libraries/SD/utility/SdInfo.h @@ -0,0 +1,232 @@ +/* Arduino Sd2Card Library
+ * Copyright (C) 2009 by William Greiman
+ *
+ * This file is part of the Arduino Sd2Card Library
+ *
+ * This Library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This Library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the Arduino Sd2Card Library. If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+#ifndef SdInfo_h
+#define SdInfo_h
+#include <stdint.h>
+// Based on the document:
+//
+// SD Specifications
+// Part 1
+// Physical Layer
+// Simplified Specification
+// Version 2.00
+// September 25, 2006
+//
+// www.sdcard.org/developers/tech/sdcard/pls/Simplified_Physical_Layer_Spec.pdf
+//------------------------------------------------------------------------------
+// SD card commands
+/** GO_IDLE_STATE - init card in spi mode if CS low */
+uint8_t const CMD0 = 0X00;
+/** SEND_IF_COND - verify SD Memory Card interface operating condition.*/
+uint8_t const CMD8 = 0X08;
+/** SEND_CSD - read the Card Specific Data (CSD register) */
+uint8_t const CMD9 = 0X09;
+/** SEND_CID - read the card identification information (CID register) */
+uint8_t const CMD10 = 0X0A;
+/** SEND_STATUS - read the card status register */
+uint8_t const CMD13 = 0X0D;
+/** READ_BLOCK - read a single data block from the card */
+uint8_t const CMD17 = 0X11;
+/** WRITE_BLOCK - write a single data block to the card */
+uint8_t const CMD24 = 0X18;
+/** WRITE_MULTIPLE_BLOCK - write blocks of data until a STOP_TRANSMISSION */
+uint8_t const CMD25 = 0X19;
+/** ERASE_WR_BLK_START - sets the address of the first block to be erased */
+uint8_t const CMD32 = 0X20;
+/** ERASE_WR_BLK_END - sets the address of the last block of the continuous
+ range to be erased*/
+uint8_t const CMD33 = 0X21;
+/** ERASE - erase all previously selected blocks */
+uint8_t const CMD38 = 0X26;
+/** APP_CMD - escape for application specific command */
+uint8_t const CMD55 = 0X37;
+/** READ_OCR - read the OCR register of a card */
+uint8_t const CMD58 = 0X3A;
+/** SET_WR_BLK_ERASE_COUNT - Set the number of write blocks to be
+ pre-erased before writing */
+uint8_t const ACMD23 = 0X17;
+/** SD_SEND_OP_COMD - Sends host capacity support information and
+ activates the card's initialization process */
+uint8_t const ACMD41 = 0X29;
+//------------------------------------------------------------------------------
+/** status for card in the ready state */
+uint8_t const R1_READY_STATE = 0X00;
+/** status for card in the idle state */
+uint8_t const R1_IDLE_STATE = 0X01;
+/** status bit for illegal command */
+uint8_t const R1_ILLEGAL_COMMAND = 0X04;
+/** start data token for read or write single block*/
+uint8_t const DATA_START_BLOCK = 0XFE;
+/** stop token for write multiple blocks*/
+uint8_t const STOP_TRAN_TOKEN = 0XFD;
+/** start data token for write multiple blocks*/
+uint8_t const WRITE_MULTIPLE_TOKEN = 0XFC;
+/** mask for data response tokens after a write block operation */
+uint8_t const DATA_RES_MASK = 0X1F;
+/** write data accepted token */
+uint8_t const DATA_RES_ACCEPTED = 0X05;
+//------------------------------------------------------------------------------
+typedef struct CID {
+ // byte 0
+ uint8_t mid; // Manufacturer ID
+ // byte 1-2
+ char oid[2]; // OEM/Application ID
+ // byte 3-7
+ char pnm[5]; // Product name
+ // byte 8
+ unsigned prv_m : 4; // Product revision n.m
+ unsigned prv_n : 4;
+ // byte 9-12
+ uint32_t psn; // Product serial number
+ // byte 13
+ unsigned mdt_year_high : 4; // Manufacturing date
+ unsigned reserved : 4;
+ // byte 14
+ unsigned mdt_month : 4;
+ unsigned mdt_year_low :4;
+ // byte 15
+ unsigned always1 : 1;
+ unsigned crc : 7;
+}cid_t;
+//------------------------------------------------------------------------------
+// CSD for version 1.00 cards
+typedef struct CSDV1 {
+ // byte 0
+ unsigned reserved1 : 6;
+ unsigned csd_ver : 2;
+ // byte 1
+ uint8_t taac;
+ // byte 2
+ uint8_t nsac;
+ // byte 3
+ uint8_t tran_speed;
+ // byte 4
+ uint8_t ccc_high;
+ // byte 5
+ unsigned read_bl_len : 4;
+ unsigned ccc_low : 4;
+ // byte 6
+ unsigned c_size_high : 2;
+ unsigned reserved2 : 2;
+ unsigned dsr_imp : 1;
+ unsigned read_blk_misalign :1;
+ unsigned write_blk_misalign : 1;
+ unsigned read_bl_partial : 1;
+ // byte 7
+ uint8_t c_size_mid;
+ // byte 8
+ unsigned vdd_r_curr_max : 3;
+ unsigned vdd_r_curr_min : 3;
+ unsigned c_size_low :2;
+ // byte 9
+ unsigned c_size_mult_high : 2;
+ unsigned vdd_w_cur_max : 3;
+ unsigned vdd_w_curr_min : 3;
+ // byte 10
+ unsigned sector_size_high : 6;
+ unsigned erase_blk_en : 1;
+ unsigned c_size_mult_low : 1;
+ // byte 11
+ unsigned wp_grp_size : 7;
+ unsigned sector_size_low : 1;
+ // byte 12
+ unsigned write_bl_len_high : 2;
+ unsigned r2w_factor : 3;
+ unsigned reserved3 : 2;
+ unsigned wp_grp_enable : 1;
+ // byte 13
+ unsigned reserved4 : 5;
+ unsigned write_partial : 1;
+ unsigned write_bl_len_low : 2;
+ // byte 14
+ unsigned reserved5: 2;
+ unsigned file_format : 2;
+ unsigned tmp_write_protect : 1;
+ unsigned perm_write_protect : 1;
+ unsigned copy : 1;
+ unsigned file_format_grp : 1;
+ // byte 15
+ unsigned always1 : 1;
+ unsigned crc : 7;
+}csd1_t;
+//------------------------------------------------------------------------------
+// CSD for version 2.00 cards
+typedef struct CSDV2 {
+ // byte 0
+ unsigned reserved1 : 6;
+ unsigned csd_ver : 2;
+ // byte 1
+ uint8_t taac;
+ // byte 2
+ uint8_t nsac;
+ // byte 3
+ uint8_t tran_speed;
+ // byte 4
+ uint8_t ccc_high;
+ // byte 5
+ unsigned read_bl_len : 4;
+ unsigned ccc_low : 4;
+ // byte 6
+ unsigned reserved2 : 4;
+ unsigned dsr_imp : 1;
+ unsigned read_blk_misalign :1;
+ unsigned write_blk_misalign : 1;
+ unsigned read_bl_partial : 1;
+ // byte 7
+ unsigned reserved3 : 2;
+ unsigned c_size_high : 6;
+ // byte 8
+ uint8_t c_size_mid;
+ // byte 9
+ uint8_t c_size_low;
+ // byte 10
+ unsigned sector_size_high : 6;
+ unsigned erase_blk_en : 1;
+ unsigned reserved4 : 1;
+ // byte 11
+ unsigned wp_grp_size : 7;
+ unsigned sector_size_low : 1;
+ // byte 12
+ unsigned write_bl_len_high : 2;
+ unsigned r2w_factor : 3;
+ unsigned reserved5 : 2;
+ unsigned wp_grp_enable : 1;
+ // byte 13
+ unsigned reserved6 : 5;
+ unsigned write_partial : 1;
+ unsigned write_bl_len_low : 2;
+ // byte 14
+ unsigned reserved7: 2;
+ unsigned file_format : 2;
+ unsigned tmp_write_protect : 1;
+ unsigned perm_write_protect : 1;
+ unsigned copy : 1;
+ unsigned file_format_grp : 1;
+ // byte 15
+ unsigned always1 : 1;
+ unsigned crc : 7;
+}csd2_t;
+//------------------------------------------------------------------------------
+// union of old and new style CSD register
+union csd_t {
+ csd1_t v1;
+ csd2_t v2;
+};
+#endif // SdInfo_h
diff --git a/libraries/SD/utility/SdVolume.cpp b/libraries/SD/utility/SdVolume.cpp new file mode 100644 index 0000000..ece4acb --- /dev/null +++ b/libraries/SD/utility/SdVolume.cpp @@ -0,0 +1,295 @@ +/* Arduino SdFat Library
+ * Copyright (C) 2009 by William Greiman
+ *
+ * This file is part of the Arduino SdFat Library
+ *
+ * This Library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This Library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the Arduino SdFat Library. If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+#include <SdFat.h>
+//------------------------------------------------------------------------------
+// raw block cache
+// init cacheBlockNumber_to invalid SD block number
+uint32_t SdVolume::cacheBlockNumber_ = 0XFFFFFFFF;
+cache_t SdVolume::cacheBuffer_; // 512 byte cache for Sd2Card
+Sd2Card* SdVolume::sdCard_; // pointer to SD card object
+uint8_t SdVolume::cacheDirty_ = 0; // cacheFlush() will write block if true
+uint32_t SdVolume::cacheMirrorBlock_ = 0; // mirror block for second FAT
+//------------------------------------------------------------------------------
+// find a contiguous group of clusters
+uint8_t SdVolume::allocContiguous(uint32_t count, uint32_t* curCluster) {
+ // start of group
+ uint32_t bgnCluster;
+
+ // flag to save place to start next search
+ uint8_t setStart;
+
+ // set search start cluster
+ if (*curCluster) {
+ // try to make file contiguous
+ bgnCluster = *curCluster + 1;
+
+ // don't save new start location
+ setStart = false;
+ } else {
+ // start at likely place for free cluster
+ bgnCluster = allocSearchStart_;
+
+ // save next search start if one cluster
+ setStart = 1 == count;
+ }
+ // end of group
+ uint32_t endCluster = bgnCluster;
+
+ // last cluster of FAT
+ uint32_t fatEnd = clusterCount_ + 1;
+
+ // search the FAT for free clusters
+ for (uint32_t n = 0;; n++, endCluster++) {
+ // can't find space checked all clusters
+ if (n >= clusterCount_) return false;
+
+ // past end - start from beginning of FAT
+ if (endCluster > fatEnd) {
+ bgnCluster = endCluster = 2;
+ }
+ uint32_t f;
+ if (!fatGet(endCluster, &f)) return false;
+
+ if (f != 0) {
+ // cluster in use try next cluster as bgnCluster
+ bgnCluster = endCluster + 1;
+ } else if ((endCluster - bgnCluster + 1) == count) {
+ // done - found space
+ break;
+ }
+ }
+ // mark end of chain
+ if (!fatPutEOC(endCluster)) return false;
+
+ // link clusters
+ while (endCluster > bgnCluster) {
+ if (!fatPut(endCluster - 1, endCluster)) return false;
+ endCluster--;
+ }
+ if (*curCluster != 0) {
+ // connect chains
+ if (!fatPut(*curCluster, bgnCluster)) return false;
+ }
+ // return first cluster number to caller
+ *curCluster = bgnCluster;
+
+ // remember possible next free cluster
+ if (setStart) allocSearchStart_ = bgnCluster + 1;
+
+ return true;
+}
+//------------------------------------------------------------------------------
+uint8_t SdVolume::cacheFlush(void) {
+ if (cacheDirty_) {
+ if (!sdCard_->writeBlock(cacheBlockNumber_, cacheBuffer_.data)) {
+ return false;
+ }
+ // mirror FAT tables
+ if (cacheMirrorBlock_) {
+ if (!sdCard_->writeBlock(cacheMirrorBlock_, cacheBuffer_.data)) {
+ return false;
+ }
+ cacheMirrorBlock_ = 0;
+ }
+ cacheDirty_ = 0;
+ }
+ return true;
+}
+//------------------------------------------------------------------------------
+uint8_t SdVolume::cacheRawBlock(uint32_t blockNumber, uint8_t action) {
+ if (cacheBlockNumber_ != blockNumber) {
+ if (!cacheFlush()) return false;
+ if (!sdCard_->readBlock(blockNumber, cacheBuffer_.data)) return false;
+ cacheBlockNumber_ = blockNumber;
+ }
+ cacheDirty_ |= action;
+ return true;
+}
+//------------------------------------------------------------------------------
+// cache a zero block for blockNumber
+uint8_t SdVolume::cacheZeroBlock(uint32_t blockNumber) {
+ if (!cacheFlush()) return false;
+
+ // loop take less flash than memset(cacheBuffer_.data, 0, 512);
+ for (uint16_t i = 0; i < 512; i++) {
+ cacheBuffer_.data[i] = 0;
+ }
+ cacheBlockNumber_ = blockNumber;
+ cacheSetDirty();
+ return true;
+}
+//------------------------------------------------------------------------------
+// return the size in bytes of a cluster chain
+uint8_t SdVolume::chainSize(uint32_t cluster, uint32_t* size) const {
+ uint32_t s = 0;
+ do {
+ if (!fatGet(cluster, &cluster)) return false;
+ s += 512UL << clusterSizeShift_;
+ } while (!isEOC(cluster));
+ *size = s;
+ return true;
+}
+//------------------------------------------------------------------------------
+// Fetch a FAT entry
+uint8_t SdVolume::fatGet(uint32_t cluster, uint32_t* value) const {
+ if (cluster > (clusterCount_ + 1)) return false;
+ uint32_t lba = fatStartBlock_;
+ lba += fatType_ == 16 ? cluster >> 8 : cluster >> 7;
+ if (lba != cacheBlockNumber_) {
+ if (!cacheRawBlock(lba, CACHE_FOR_READ)) return false;
+ }
+ if (fatType_ == 16) {
+ *value = cacheBuffer_.fat16[cluster & 0XFF];
+ } else {
+ *value = cacheBuffer_.fat32[cluster & 0X7F] & FAT32MASK;
+ }
+ return true;
+}
+//------------------------------------------------------------------------------
+// Store a FAT entry
+uint8_t SdVolume::fatPut(uint32_t cluster, uint32_t value) {
+ // error if reserved cluster
+ if (cluster < 2) return false;
+
+ // error if not in FAT
+ if (cluster > (clusterCount_ + 1)) return false;
+
+ // calculate block address for entry
+ uint32_t lba = fatStartBlock_;
+ lba += fatType_ == 16 ? cluster >> 8 : cluster >> 7;
+
+ if (lba != cacheBlockNumber_) {
+ if (!cacheRawBlock(lba, CACHE_FOR_READ)) return false;
+ }
+ // store entry
+ if (fatType_ == 16) {
+ cacheBuffer_.fat16[cluster & 0XFF] = value;
+ } else {
+ cacheBuffer_.fat32[cluster & 0X7F] = value;
+ }
+ cacheSetDirty();
+
+ // mirror second FAT
+ if (fatCount_ > 1) cacheMirrorBlock_ = lba + blocksPerFat_;
+ return true;
+}
+//------------------------------------------------------------------------------
+// free a cluster chain
+uint8_t SdVolume::freeChain(uint32_t cluster) {
+ // clear free cluster location
+ allocSearchStart_ = 2;
+
+ do {
+ uint32_t next;
+ if (!fatGet(cluster, &next)) return false;
+
+ // free cluster
+ if (!fatPut(cluster, 0)) return false;
+
+ cluster = next;
+ } while (!isEOC(cluster));
+
+ return true;
+}
+//------------------------------------------------------------------------------
+/**
+ * Initialize a FAT volume.
+ *
+ * \param[in] dev The SD card where the volume is located.
+ *
+ * \param[in] part The partition to be used. Legal values for \a part are
+ * 1-4 to use the corresponding partition on a device formatted with
+ * a MBR, Master Boot Record, or zero if the device is formatted as
+ * a super floppy with the FAT boot sector in block zero.
+ *
+ * \return The value one, true, is returned for success and
+ * the value zero, false, is returned for failure. Reasons for
+ * failure include not finding a valid partition, not finding a valid
+ * FAT file system in the specified partition or an I/O error.
+ */
+uint8_t SdVolume::init(Sd2Card* dev, uint8_t part) {
+ uint32_t volumeStartBlock = 0;
+ sdCard_ = dev;
+ // if part == 0 assume super floppy with FAT boot sector in block zero
+ // if part > 0 assume mbr volume with partition table
+ if (part) {
+ if (part > 4)return false;
+ if (!cacheRawBlock(volumeStartBlock, CACHE_FOR_READ)) return false;
+ part_t* p = &cacheBuffer_.mbr.part[part-1];
+ if ((p->boot & 0X7F) !=0 ||
+ p->totalSectors < 100 ||
+ p->firstSector == 0) {
+ // not a valid partition
+ return false;
+ }
+ volumeStartBlock = p->firstSector;
+ }
+ if (!cacheRawBlock(volumeStartBlock, CACHE_FOR_READ)) return false;
+ bpb_t* bpb = &cacheBuffer_.fbs.bpb;
+ if (bpb->bytesPerSector != 512 ||
+ bpb->fatCount == 0 ||
+ bpb->reservedSectorCount == 0 ||
+ bpb->sectorsPerCluster == 0) {
+ // not valid FAT volume
+ return false;
+ }
+ fatCount_ = bpb->fatCount;
+ blocksPerCluster_ = bpb->sectorsPerCluster;
+
+ // determine shift that is same as multiply by blocksPerCluster_
+ clusterSizeShift_ = 0;
+ while (blocksPerCluster_ != (1 << clusterSizeShift_)) {
+ // error if not power of 2
+ if (clusterSizeShift_++ > 7) return false;
+ }
+ blocksPerFat_ = bpb->sectorsPerFat16 ?
+ bpb->sectorsPerFat16 : bpb->sectorsPerFat32;
+
+ fatStartBlock_ = volumeStartBlock + bpb->reservedSectorCount;
+
+ // count for FAT16 zero for FAT32
+ rootDirEntryCount_ = bpb->rootDirEntryCount;
+
+ // directory start for FAT16 dataStart for FAT32
+ rootDirStart_ = fatStartBlock_ + bpb->fatCount * blocksPerFat_;
+
+ // data start for FAT16 and FAT32
+ dataStartBlock_ = rootDirStart_ + ((32 * bpb->rootDirEntryCount + 511)/512);
+
+ // total blocks for FAT16 or FAT32
+ uint32_t totalBlocks = bpb->totalSectors16 ?
+ bpb->totalSectors16 : bpb->totalSectors32;
+ // total data blocks
+ clusterCount_ = totalBlocks - (dataStartBlock_ - volumeStartBlock);
+
+ // divide by cluster size to get cluster count
+ clusterCount_ >>= clusterSizeShift_;
+
+ // FAT type is determined by cluster count
+ if (clusterCount_ < 4085) {
+ fatType_ = 12;
+ } else if (clusterCount_ < 65525) {
+ fatType_ = 16;
+ } else {
+ rootDirStart_ = bpb->fat32RootCluster;
+ fatType_ = 32;
+ }
+ return true;
+}
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