diff options
Diffstat (limited to 'cores/arduino')
| -rw-r--r--[-rwxr-xr-x] | cores/arduino/Arduino.h | 13 | ||||
| -rw-r--r-- | cores/arduino/CDC.cpp | 41 | ||||
| -rw-r--r-- | cores/arduino/HardwareSerial.cpp | 495 | ||||
| -rw-r--r-- | cores/arduino/HardwareSerial.h | 119 | ||||
| -rw-r--r-- | cores/arduino/HardwareSerial0.cpp | 79 | ||||
| -rw-r--r-- | cores/arduino/HardwareSerial1.cpp | 79 | ||||
| -rw-r--r-- | cores/arduino/HardwareSerial2.cpp | 79 | ||||
| -rw-r--r-- | cores/arduino/HardwareSerial3.cpp | 79 | ||||
| -rw-r--r-- | cores/arduino/HardwareSerial_private.h | 118 | ||||
| -rw-r--r-- | cores/arduino/IPAddress.cpp | 2 | ||||
| -rw-r--r-- | cores/arduino/IPAddress.h | 7 | ||||
| -rw-r--r--[-rwxr-xr-x] | cores/arduino/Print.cpp | 8 | ||||
| -rw-r--r--[-rwxr-xr-x] | cores/arduino/Print.h | 3 | ||||
| -rw-r--r-- | cores/arduino/Stream.h | 6 | ||||
| -rw-r--r--[-rwxr-xr-x] | cores/arduino/Tone.cpp | 0 | ||||
| -rw-r--r-- | cores/arduino/USBAPI.h | 16 | ||||
| -rw-r--r-- | cores/arduino/USBCore.cpp | 70 | ||||
| -rw-r--r-- | cores/arduino/hooks.c | 31 | ||||
| -rw-r--r-- | cores/arduino/wiring.c | 1 | ||||
| -rw-r--r--[-rwxr-xr-x] | cores/arduino/wiring_private.h | 0 | ||||
| -rw-r--r--[-rwxr-xr-x] | cores/arduino/wiring_pulse.c | 0 | ||||
| -rw-r--r--[-rwxr-xr-x] | cores/arduino/wiring_shift.c | 0 |
22 files changed, 748 insertions, 498 deletions
diff --git a/cores/arduino/Arduino.h b/cores/arduino/Arduino.h index 93a3525..e12ac82 100755..100644 --- a/cores/arduino/Arduino.h +++ b/cores/arduino/Arduino.h @@ -34,6 +34,8 @@ extern "C"{ #endif +void yield(void); + #define HIGH 0x1 #define LOW 0x0 @@ -49,6 +51,7 @@ extern "C"{ #define TWO_PI 6.283185307179586476925286766559 #define DEG_TO_RAD 0.017453292519943295769236907684886 #define RAD_TO_DEG 57.295779513082320876798154814105 +#define EULER 2.718281828459045235360287471352 #define SERIAL 0x0 #define DISPLAY 0x1 @@ -104,6 +107,10 @@ extern "C"{ #define bitClear(value, bit) ((value) &= ~(1UL << (bit))) #define bitWrite(value, bit, bitvalue) (bitvalue ? bitSet(value, bit) : bitClear(value, bit)) +// avr-libc defines _NOP() since 1.6.2 +#ifndef _NOP +#define _NOP() do { __asm__ volatile ("nop"); } while (0) +#endif typedef unsigned int word; @@ -168,6 +175,8 @@ extern const uint8_t PROGMEM digital_pin_to_timer_PGM[]; #define NOT_A_PIN 0 #define NOT_A_PORT 0 +#define NOT_AN_INTERRUPT -1 + #ifdef ARDUINO_MAIN #define PA 1 #define PB 2 @@ -210,6 +219,10 @@ extern const uint8_t PROGMEM digital_pin_to_timer_PGM[]; #include "WCharacter.h" #include "WString.h" #include "HardwareSerial.h" +#include "USBAPI.h" +#if defined(HAVE_HWSERIAL0) && defined(HAVE_CDCSERIAL) +#error "Targets with both UART0 and CDC serial not supported" +#endif uint16_t makeWord(uint16_t w); uint16_t makeWord(byte h, byte l); diff --git a/cores/arduino/CDC.cpp b/cores/arduino/CDC.cpp index e1e859d..a691306 100644 --- a/cores/arduino/CDC.cpp +++ b/cores/arduino/CDC.cpp @@ -23,21 +23,6 @@ #if defined(USBCON) #ifdef CDC_ENABLED -#if (RAMEND < 1000) -#define SERIAL_BUFFER_SIZE 16 -#else -#define SERIAL_BUFFER_SIZE 64 -#endif - -struct ring_buffer -{ - unsigned char buffer[SERIAL_BUFFER_SIZE]; - volatile int head; - volatile int tail; -}; - -ring_buffer cdc_rx_buffer = { { 0 }, 0, 0}; - typedef struct { u32 dwDTERate; @@ -144,8 +129,7 @@ void Serial_::end(void) void Serial_::accept(void) { - ring_buffer *buffer = &cdc_rx_buffer; - int i = (unsigned int)(buffer->head+1) % SERIAL_BUFFER_SIZE; + int i = (unsigned int)(_rx_buffer_head+1) % SERIAL_BUFFER_SIZE; // if we should be storing the received character into the location // just before the tail (meaning that the head would advance to the @@ -153,42 +137,39 @@ void Serial_::accept(void) // and so we don't write the character or advance the head. // while we have room to store a byte - while (i != buffer->tail) { + while (i != _rx_buffer_tail) { int c = USB_Recv(CDC_RX); if (c == -1) break; // no more data - buffer->buffer[buffer->head] = c; - buffer->head = i; + _rx_buffer[_rx_buffer_head] = c; + _rx_buffer_head = i; - i = (unsigned int)(buffer->head+1) % SERIAL_BUFFER_SIZE; + i = (unsigned int)(_rx_buffer_head+1) % SERIAL_BUFFER_SIZE; } } int Serial_::available(void) { - ring_buffer *buffer = &cdc_rx_buffer; - return (unsigned int)(SERIAL_BUFFER_SIZE + buffer->head - buffer->tail) % SERIAL_BUFFER_SIZE; + return (unsigned int)(SERIAL_BUFFER_SIZE + _rx_buffer_head - _rx_buffer_tail) % SERIAL_BUFFER_SIZE; } int Serial_::peek(void) { - ring_buffer *buffer = &cdc_rx_buffer; - if (buffer->head == buffer->tail) { + if (_rx_buffer_head == _rx_buffer_tail) { return -1; } else { - return buffer->buffer[buffer->tail]; + return _rx_buffer[_rx_buffer_tail]; } } int Serial_::read(void) { - ring_buffer *buffer = &cdc_rx_buffer; // if the head isn't ahead of the tail, we don't have any characters - if (buffer->head == buffer->tail) { + if (_rx_buffer_head == _rx_buffer_tail) { return -1; } else { - unsigned char c = buffer->buffer[buffer->tail]; - buffer->tail = (unsigned int)(buffer->tail + 1) % SERIAL_BUFFER_SIZE; + unsigned char c = _rx_buffer[_rx_buffer_tail]; + _rx_buffer_tail = (unsigned int)(_rx_buffer_tail + 1) % SERIAL_BUFFER_SIZE; return c; } } diff --git a/cores/arduino/HardwareSerial.cpp b/cores/arduino/HardwareSerial.cpp index eb2365f..e165136 100644 --- a/cores/arduino/HardwareSerial.cpp +++ b/cores/arduino/HardwareSerial.cpp @@ -19,6 +19,7 @@ Modified 23 November 2006 by David A. Mellis Modified 28 September 2010 by Mark Sproul Modified 14 August 2012 by Alarus + Modified 3 December 2013 by Matthijs Kooijman */ #include <stdlib.h> @@ -26,483 +27,211 @@ #include <string.h> #include <inttypes.h> #include "Arduino.h" -#include "wiring_private.h" - -// this next line disables the entire HardwareSerial.cpp, -// this is so I can support Attiny series and any other chip without a uart -#if defined(UBRRH) || defined(UBRR0H) || defined(UBRR1H) || defined(UBRR2H) || defined(UBRR3H) #include "HardwareSerial.h" +#include "HardwareSerial_private.h" -/* - * on ATmega8, the uart and its bits are not numbered, so there is no "TXC0" - * definition. - */ -#if !defined(TXC0) -#if defined(TXC) -#define TXC0 TXC -#elif defined(TXC1) -// Some devices have uart1 but no uart0 -#define TXC0 TXC1 -#else -#error TXC0 not definable in HardwareSerial.h -#endif -#endif - -// Define constants and variables for buffering incoming serial data. We're -// using a ring buffer (I think), in which head is the index of the location -// to which to write the next incoming character and tail is the index of the -// location from which to read. -#if (RAMEND < 1000) - #define SERIAL_BUFFER_SIZE 16 -#else - #define SERIAL_BUFFER_SIZE 64 -#endif - -struct ring_buffer -{ - unsigned char buffer[SERIAL_BUFFER_SIZE]; - volatile unsigned int head; - volatile unsigned int tail; -}; - -#if defined(USBCON) - ring_buffer rx_buffer = { { 0 }, 0, 0}; - ring_buffer tx_buffer = { { 0 }, 0, 0}; -#endif -#if defined(UBRRH) || defined(UBRR0H) - ring_buffer rx_buffer = { { 0 }, 0, 0 }; - ring_buffer tx_buffer = { { 0 }, 0, 0 }; -#endif -#if defined(UBRR1H) - ring_buffer rx_buffer1 = { { 0 }, 0, 0 }; - ring_buffer tx_buffer1 = { { 0 }, 0, 0 }; -#endif -#if defined(UBRR2H) - ring_buffer rx_buffer2 = { { 0 }, 0, 0 }; - ring_buffer tx_buffer2 = { { 0 }, 0, 0 }; -#endif -#if defined(UBRR3H) - ring_buffer rx_buffer3 = { { 0 }, 0, 0 }; - ring_buffer tx_buffer3 = { { 0 }, 0, 0 }; -#endif - -inline void store_char(unsigned char c, ring_buffer *buffer) -{ - int i = (unsigned int)(buffer->head + 1) % SERIAL_BUFFER_SIZE; - - // if we should be storing the received character into the location - // just before the tail (meaning that the head would advance to the - // current location of the tail), we're about to overflow the buffer - // and so we don't write the character or advance the head. - if (i != buffer->tail) { - buffer->buffer[buffer->head] = c; - buffer->head = i; - } -} - -#if !defined(USART0_RX_vect) && defined(USART1_RX_vect) -// do nothing - on the 32u4 the first USART is USART1 -#else -#if !defined(USART_RX_vect) && !defined(USART0_RX_vect) && \ - !defined(USART_RXC_vect) - #error "Don't know what the Data Received vector is called for the first UART" -#else +// this next line disables the entire HardwareSerial.cpp, +// this is so I can support Attiny series and any other chip without a uart +#if defined(HAVE_HWSERIAL0) || defined(HAVE_HWSERIAL1) || defined(HAVE_HWSERIAL2) || defined(HAVE_HWSERIAL3) + +// SerialEvent functions are weak, so when the user doesn't define them, +// the linker just sets their address to 0 (which is checked below). +// The Serialx_available is just a wrapper around Serialx.available(), +// but we can refer to it weakly so we don't pull in the entire +// HardwareSerial instance if the user doesn't also refer to it. +#if defined(HAVE_HWSERIAL0) void serialEvent() __attribute__((weak)); - void serialEvent() {} - #define serialEvent_implemented -#if defined(USART_RX_vect) - ISR(USART_RX_vect) -#elif defined(USART0_RX_vect) - ISR(USART0_RX_vect) -#elif defined(USART_RXC_vect) - ISR(USART_RXC_vect) // ATmega8 -#endif - { - #if defined(UDR0) - if (bit_is_clear(UCSR0A, UPE0)) { - unsigned char c = UDR0; - store_char(c, &rx_buffer); - } else { - unsigned char c = UDR0; - }; - #elif defined(UDR) - if (bit_is_clear(UCSRA, PE)) { - unsigned char c = UDR; - store_char(c, &rx_buffer); - } else { - unsigned char c = UDR; - }; - #else - #error UDR not defined - #endif - } -#endif + bool Serial0_available() __attribute__((weak)); #endif -#if defined(USART1_RX_vect) +#if defined(HAVE_HWSERIAL1) void serialEvent1() __attribute__((weak)); - void serialEvent1() {} - #define serialEvent1_implemented - ISR(USART1_RX_vect) - { - if (bit_is_clear(UCSR1A, UPE1)) { - unsigned char c = UDR1; - store_char(c, &rx_buffer1); - } else { - unsigned char c = UDR1; - }; - } + bool Serial1_available() __attribute__((weak)); #endif -#if defined(USART2_RX_vect) && defined(UDR2) +#if defined(HAVE_HWSERIAL2) void serialEvent2() __attribute__((weak)); - void serialEvent2() {} - #define serialEvent2_implemented - ISR(USART2_RX_vect) - { - if (bit_is_clear(UCSR2A, UPE2)) { - unsigned char c = UDR2; - store_char(c, &rx_buffer2); - } else { - unsigned char c = UDR2; - }; - } + bool Serial2_available() __attribute__((weak)); #endif -#if defined(USART3_RX_vect) && defined(UDR3) +#if defined(HAVE_HWSERIAL3) void serialEvent3() __attribute__((weak)); - void serialEvent3() {} - #define serialEvent3_implemented - ISR(USART3_RX_vect) - { - if (bit_is_clear(UCSR3A, UPE3)) { - unsigned char c = UDR3; - store_char(c, &rx_buffer3); - } else { - unsigned char c = UDR3; - }; - } + bool Serial3_available() __attribute__((weak)); #endif void serialEventRun(void) { -#ifdef serialEvent_implemented - if (Serial.available()) serialEvent(); +#if defined(HAVE_HWSERIAL0) + if (Serial0_available && serialEvent && Serial0_available()) serialEvent(); #endif -#ifdef serialEvent1_implemented - if (Serial1.available()) serialEvent1(); +#if defined(HAVE_HWSERIAL1) + if (Serial1_available && serialEvent1 && Serial1_available()) serialEvent1(); #endif -#ifdef serialEvent2_implemented - if (Serial2.available()) serialEvent2(); +#if defined(HAVE_HWSERIAL2) + if (Serial2_available && serialEvent2 && Serial2_available()) serialEvent2(); #endif -#ifdef serialEvent3_implemented - if (Serial3.available()) serialEvent3(); +#if defined(HAVE_HWSERIAL3) + if (Serial3_available && serialEvent3 && Serial3_available()) serialEvent3(); #endif } +// Actual interrupt handlers ////////////////////////////////////////////////////////////// -#if !defined(USART0_UDRE_vect) && defined(USART1_UDRE_vect) -// do nothing - on the 32u4 the first USART is USART1 -#else -#if !defined(UART0_UDRE_vect) && !defined(UART_UDRE_vect) && !defined(USART0_UDRE_vect) && !defined(USART_UDRE_vect) - #error "Don't know what the Data Register Empty vector is called for the first UART" -#else -#if defined(UART0_UDRE_vect) -ISR(UART0_UDRE_vect) -#elif defined(UART_UDRE_vect) -ISR(UART_UDRE_vect) -#elif defined(USART0_UDRE_vect) -ISR(USART0_UDRE_vect) -#elif defined(USART_UDRE_vect) -ISR(USART_UDRE_vect) -#endif +void HardwareSerial::_tx_udr_empty_irq(void) { - if (tx_buffer.head == tx_buffer.tail) { - // Buffer empty, so disable interrupts -#if defined(UCSR0B) - cbi(UCSR0B, UDRIE0); -#else - cbi(UCSRB, UDRIE); -#endif - } - else { - // There is more data in the output buffer. Send the next byte - unsigned char c = tx_buffer.buffer[tx_buffer.tail]; - tx_buffer.tail = (tx_buffer.tail + 1) % SERIAL_BUFFER_SIZE; - - #if defined(UDR0) - UDR0 = c; - #elif defined(UDR) - UDR = c; - #else - #error UDR not defined - #endif - } -} -#endif -#endif + // If interrupts are enabled, there must be more data in the output + // buffer. Send the next byte + unsigned char c = _tx_buffer[_tx_buffer_tail]; + _tx_buffer_tail = (_tx_buffer_tail + 1) % SERIAL_TX_BUFFER_SIZE; -#ifdef USART1_UDRE_vect -ISR(USART1_UDRE_vect) -{ - if (tx_buffer1.head == tx_buffer1.tail) { - // Buffer empty, so disable interrupts - cbi(UCSR1B, UDRIE1); - } - else { - // There is more data in the output buffer. Send the next byte - unsigned char c = tx_buffer1.buffer[tx_buffer1.tail]; - tx_buffer1.tail = (tx_buffer1.tail + 1) % SERIAL_BUFFER_SIZE; - - UDR1 = c; - } -} -#endif + *_udr = c; -#ifdef USART2_UDRE_vect -ISR(USART2_UDRE_vect) -{ - if (tx_buffer2.head == tx_buffer2.tail) { - // Buffer empty, so disable interrupts - cbi(UCSR2B, UDRIE2); - } - else { - // There is more data in the output buffer. Send the next byte - unsigned char c = tx_buffer2.buffer[tx_buffer2.tail]; - tx_buffer2.tail = (tx_buffer2.tail + 1) % SERIAL_BUFFER_SIZE; - - UDR2 = c; - } -} -#endif + // clear the TXC bit -- "can be cleared by writing a one to its bit + // location". This makes sure flush() won't return until the bytes + // actually got written + sbi(*_ucsra, TXC0); -#ifdef USART3_UDRE_vect -ISR(USART3_UDRE_vect) -{ - if (tx_buffer3.head == tx_buffer3.tail) { - // Buffer empty, so disable interrupts - cbi(UCSR3B, UDRIE3); - } - else { - // There is more data in the output buffer. Send the next byte - unsigned char c = tx_buffer3.buffer[tx_buffer3.tail]; - tx_buffer3.tail = (tx_buffer3.tail + 1) % SERIAL_BUFFER_SIZE; - - UDR3 = c; + if (_tx_buffer_head == _tx_buffer_tail) { + // Buffer empty, so disable interrupts + cbi(*_ucsrb, UDRIE0); } } -#endif - - -// Constructors //////////////////////////////////////////////////////////////// - -HardwareSerial::HardwareSerial(ring_buffer *rx_buffer, ring_buffer *tx_buffer, - volatile uint8_t *ubrrh, volatile uint8_t *ubrrl, - volatile uint8_t *ucsra, volatile uint8_t *ucsrb, - volatile uint8_t *ucsrc, volatile uint8_t *udr, - uint8_t rxen, uint8_t txen, uint8_t rxcie, uint8_t udrie, uint8_t u2x) -{ - _rx_buffer = rx_buffer; - _tx_buffer = tx_buffer; - _ubrrh = ubrrh; - _ubrrl = ubrrl; - _ucsra = ucsra; - _ucsrb = ucsrb; - _ucsrc = ucsrc; - _udr = udr; - _rxen = rxen; - _txen = txen; - _rxcie = rxcie; - _udrie = udrie; - _u2x = u2x; -} // Public Methods ////////////////////////////////////////////////////////////// -void HardwareSerial::begin(unsigned long baud) -{ - uint16_t baud_setting; - bool use_u2x = true; - -#if F_CPU == 16000000UL - // hardcoded exception for compatibility with the bootloader shipped - // with the Duemilanove and previous boards and the firmware on the 8U2 - // on the Uno and Mega 2560. - if (baud == 57600) { - use_u2x = false; - } -#endif - -try_again: - - if (use_u2x) { - *_ucsra = 1 << _u2x; - baud_setting = (F_CPU / 4 / baud - 1) / 2; - } else { - *_ucsra = 0; - baud_setting = (F_CPU / 8 / baud - 1) / 2; - } - - if ((baud_setting > 4095) && use_u2x) - { - use_u2x = false; - goto try_again; - } - - // assign the baud_setting, a.k.a. ubbr (USART Baud Rate Register) - *_ubrrh = baud_setting >> 8; - *_ubrrl = baud_setting; - - transmitting = false; - - sbi(*_ucsrb, _rxen); - sbi(*_ucsrb, _txen); - sbi(*_ucsrb, _rxcie); - cbi(*_ucsrb, _udrie); -} - void HardwareSerial::begin(unsigned long baud, byte config) { - uint16_t baud_setting; - uint8_t current_config; - bool use_u2x = true; - -#if F_CPU == 16000000UL - // hardcoded exception for compatibility with the bootloader shipped - // with the Duemilanove and previous boards and the firmware on the 8U2 - // on the Uno and Mega 2560. - if (baud == 57600) { - use_u2x = false; - } -#endif + // Try u2x mode first + uint16_t baud_setting = (F_CPU / 4 / baud - 1) / 2; + *_ucsra = 1 << U2X0; -try_again: - - if (use_u2x) { - *_ucsra = 1 << _u2x; - baud_setting = (F_CPU / 4 / baud - 1) / 2; - } else { + // hardcoded exception for 57600 for compatibility with the bootloader + // shipped with the Duemilanove and previous boards and the firmware + // on the 8U2 on the Uno and Mega 2560. Also, The baud_setting cannot + // be > 4095, so switch back to non-u2x mode if the baud rate is too + // low. + if (((F_CPU == 16000000UL) && (baud == 57600)) || (baud_setting >4095)) + { *_ucsra = 0; baud_setting = (F_CPU / 8 / baud - 1) / 2; } - - if ((baud_setting > 4095) && use_u2x) - { - use_u2x = false; - goto try_again; - } // assign the baud_setting, a.k.a. ubbr (USART Baud Rate Register) *_ubrrh = baud_setting >> 8; *_ubrrl = baud_setting; + _written = false; + //set the data bits, parity, and stop bits #if defined(__AVR_ATmega8__) config |= 0x80; // select UCSRC register (shared with UBRRH) #endif *_ucsrc = config; - sbi(*_ucsrb, _rxen); - sbi(*_ucsrb, _txen); - sbi(*_ucsrb, _rxcie); - cbi(*_ucsrb, _udrie); + sbi(*_ucsrb, RXEN0); + sbi(*_ucsrb, TXEN0); + sbi(*_ucsrb, RXCIE0); + cbi(*_ucsrb, UDRIE0); } void HardwareSerial::end() { // wait for transmission of outgoing data - while (_tx_buffer->head != _tx_buffer->tail) + while (_tx_buffer_head != _tx_buffer_tail) ; - cbi(*_ucsrb, _rxen); - cbi(*_ucsrb, _txen); - cbi(*_ucsrb, _rxcie); - cbi(*_ucsrb, _udrie); + cbi(*_ucsrb, RXEN0); + cbi(*_ucsrb, TXEN0); + cbi(*_ucsrb, RXCIE0); + cbi(*_ucsrb, UDRIE0); // clear any received data - _rx_buffer->head = _rx_buffer->tail; + _rx_buffer_head = _rx_buffer_tail; } int HardwareSerial::available(void) { - return (unsigned int)(SERIAL_BUFFER_SIZE + _rx_buffer->head - _rx_buffer->tail) % SERIAL_BUFFER_SIZE; + return (unsigned int)(SERIAL_RX_BUFFER_SIZE + _rx_buffer_head - _rx_buffer_tail) % SERIAL_RX_BUFFER_SIZE; } int HardwareSerial::peek(void) { - if (_rx_buffer->head == _rx_buffer->tail) { + if (_rx_buffer_head == _rx_buffer_tail) { return -1; } else { - return _rx_buffer->buffer[_rx_buffer->tail]; + return _rx_buffer[_rx_buffer_tail]; } } int HardwareSerial::read(void) { // if the head isn't ahead of the tail, we don't have any characters - if (_rx_buffer->head == _rx_buffer->tail) { + if (_rx_buffer_head == _rx_buffer_tail) { return -1; } else { - unsigned char c = _rx_buffer->buffer[_rx_buffer->tail]; - _rx_buffer->tail = (unsigned int)(_rx_buffer->tail + 1) % SERIAL_BUFFER_SIZE; + unsigned char c = _rx_buffer[_rx_buffer_tail]; + _rx_buffer_tail = (rx_buffer_index_t)(_rx_buffer_tail + 1) % SERIAL_RX_BUFFER_SIZE; return c; } } void HardwareSerial::flush() { - // UDR is kept full while the buffer is not empty, so TXC triggers when EMPTY && SENT - while (transmitting && ! (*_ucsra & _BV(TXC0))); - transmitting = false; + // If we have never written a byte, no need to flush. This special + // case is needed since there is no way to force the TXC (transmit + // complete) bit to 1 during initialization + if (!_written) + return; + + while (bit_is_set(*_ucsrb, UDRIE0) || bit_is_clear(*_ucsra, TXC0)) { + if (bit_is_clear(SREG, SREG_I) && bit_is_set(*_ucsrb, UDRIE0)) + // Interrupts are globally disabled, but the DR empty + // interrupt should be enabled, so poll the DR empty flag to + // prevent deadlock + if (bit_is_set(*_ucsra, UDRE0)) + _tx_udr_empty_irq(); + } + // If we get here, nothing is queued anymore (DRIE is disabled) and + // the hardware finished tranmission (TXC is set). } size_t HardwareSerial::write(uint8_t c) { - int i = (_tx_buffer->head + 1) % SERIAL_BUFFER_SIZE; + // If the buffer and the data register is empty, just write the byte + // to the data register and be done. This shortcut helps + // significantly improve the effective datarate at high (> + // 500kbit/s) bitrates, where interrupt overhead becomes a slowdown. + if (_tx_buffer_head == _tx_buffer_tail && bit_is_set(*_ucsra, UDRE0)) { + *_udr = c; + sbi(*_ucsra, TXC0); + return 1; + } + tx_buffer_index_t i = (_tx_buffer_head + 1) % SERIAL_TX_BUFFER_SIZE; // If the output buffer is full, there's nothing for it other than to // wait for the interrupt handler to empty it a bit - // ???: return 0 here instead? - while (i == _tx_buffer->tail) - ; - - _tx_buffer->buffer[_tx_buffer->head] = c; - _tx_buffer->head = i; + while (i == _tx_buffer_tail) { + if (bit_is_clear(SREG, SREG_I)) { + // Interrupts are disabled, so we'll have to poll the data + // register empty flag ourselves. If it is set, pretend an + // interrupt has happened and call the handler to free up + // space for us. + if(bit_is_set(*_ucsra, UDRE0)) + _tx_udr_empty_irq(); + } else { + // nop, the interrupt handler will free up space for us + } + } + + _tx_buffer[_tx_buffer_head] = c; + _tx_buffer_head = i; - sbi(*_ucsrb, _udrie); - // clear the TXC bit -- "can be cleared by writing a one to its bit location" - transmitting = true; - sbi(*_ucsra, TXC0); + sbi(*_ucsrb, UDRIE0); + _written = true; return 1; } -HardwareSerial::operator bool() { - return true; -} - -// Preinstantiate Objects ////////////////////////////////////////////////////// - -#if defined(UBRRH) && defined(UBRRL) - HardwareSerial Serial(&rx_buffer, &tx_buffer, &UBRRH, &UBRRL, &UCSRA, &UCSRB, &UCSRC, &UDR, RXEN, TXEN, RXCIE, UDRIE, U2X); -#elif defined(UBRR0H) && defined(UBRR0L) - HardwareSerial Serial(&rx_buffer, &tx_buffer, &UBRR0H, &UBRR0L, &UCSR0A, &UCSR0B, &UCSR0C, &UDR0, RXEN0, TXEN0, RXCIE0, UDRIE0, U2X0); -#elif defined(USBCON) - // do nothing - Serial object and buffers are initialized in CDC code -#else - #error no serial port defined (port 0) -#endif - -#if defined(UBRR1H) - HardwareSerial Serial1(&rx_buffer1, &tx_buffer1, &UBRR1H, &UBRR1L, &UCSR1A, &UCSR1B, &UCSR1C, &UDR1, RXEN1, TXEN1, RXCIE1, UDRIE1, U2X1); -#endif -#if defined(UBRR2H) - HardwareSerial Serial2(&rx_buffer2, &tx_buffer2, &UBRR2H, &UBRR2L, &UCSR2A, &UCSR2B, &UCSR2C, &UDR2, RXEN2, TXEN2, RXCIE2, UDRIE2, U2X2); -#endif -#if defined(UBRR3H) - HardwareSerial Serial3(&rx_buffer3, &tx_buffer3, &UBRR3H, &UBRR3L, &UCSR3A, &UCSR3B, &UCSR3C, &UDR3, RXEN3, TXEN3, RXCIE3, UDRIE3, U2X3); -#endif #endif // whole file - diff --git a/cores/arduino/HardwareSerial.h b/cores/arduino/HardwareSerial.h index a73117f..b96e5d0 100644 --- a/cores/arduino/HardwareSerial.h +++ b/cores/arduino/HardwareSerial.h @@ -18,6 +18,7 @@ Modified 28 September 2010 by Mark Sproul Modified 14 August 2012 by Alarus + Modified 3 December 2013 by Matthijs Kooijman */ #ifndef HardwareSerial_h @@ -27,46 +28,29 @@ #include "Stream.h" -struct ring_buffer; - -class HardwareSerial : public Stream -{ - private: - ring_buffer *_rx_buffer; - ring_buffer *_tx_buffer; - volatile uint8_t *_ubrrh; - volatile uint8_t *_ubrrl; - volatile uint8_t *_ucsra; - volatile uint8_t *_ucsrb; - volatile uint8_t *_ucsrc; - volatile uint8_t *_udr; - uint8_t _rxen; - uint8_t _txen; - uint8_t _rxcie; - uint8_t _udrie; - uint8_t _u2x; - bool transmitting; - public: - HardwareSerial(ring_buffer *rx_buffer, ring_buffer *tx_buffer, - volatile uint8_t *ubrrh, volatile uint8_t *ubrrl, - volatile uint8_t *ucsra, volatile uint8_t *ucsrb, - volatile uint8_t *ucsrc, volatile uint8_t *udr, - uint8_t rxen, uint8_t txen, uint8_t rxcie, uint8_t udrie, uint8_t u2x); - void begin(unsigned long); - void begin(unsigned long, uint8_t); - void end(); - virtual int available(void); - virtual int peek(void); - virtual int read(void); - virtual void flush(void); - virtual size_t write(uint8_t); - inline size_t write(unsigned long n) { return write((uint8_t)n); } - inline size_t write(long n) { return write((uint8_t)n); } - inline size_t write(unsigned int n) { return write((uint8_t)n); } - inline size_t write(int n) { return write((uint8_t)n); } - using Print::write; // pull in write(str) and write(buf, size) from Print - operator bool(); -}; +// Define constants and variables for buffering incoming serial data. We're +// using a ring buffer (I think), in which head is the index of the location +// to which to write the next incoming character and tail is the index of the +// location from which to read. +#if !(defined(SERIAL_TX_BUFFER_SIZE) && defined(SERIAL_RX_BUFFER_SIZE)) +#if (RAMEND < 1000) +#define SERIAL_TX_BUFFER_SIZE 16 +#define SERIAL_RX_BUFFER_SIZE 16 +#else +#define SERIAL_TX_BUFFER_SIZE 64 +#define SERIAL_RX_BUFFER_SIZE 64 +#endif +#endif +#if (SERIAL_TX_BUFFER_SIZE>256) +typedef uint16_t tx_buffer_index_t; +#else +typedef uint8_t tx_buffer_index_t; +#endif +#if (SERIAL_RX_BUFFER_SIZE>256) +typedef uint16_t rx_buffer_index_t; +#else +typedef uint8_t rx_buffer_index_t; +#endif // Define config for Serial.begin(baud, config); #define SERIAL_5N1 0x00 @@ -94,20 +78,69 @@ class HardwareSerial : public Stream #define SERIAL_7O2 0x3C #define SERIAL_8O2 0x3E +class HardwareSerial : public Stream +{ + protected: + volatile uint8_t * const _ubrrh; + volatile uint8_t * const _ubrrl; + volatile uint8_t * const _ucsra; + volatile uint8_t * const _ucsrb; + volatile uint8_t * const _ucsrc; + volatile uint8_t * const _udr; + // Has any byte been written to the UART since begin() + bool _written; + + volatile rx_buffer_index_t _rx_buffer_head; + volatile rx_buffer_index_t _rx_buffer_tail; + volatile tx_buffer_index_t _tx_buffer_head; + volatile tx_buffer_index_t _tx_buffer_tail; + + // Don't put any members after these buffers, since only the first + // 32 bytes of this struct can be accessed quickly using the ldd + // instruction. + unsigned char _rx_buffer[SERIAL_RX_BUFFER_SIZE]; + unsigned char _tx_buffer[SERIAL_TX_BUFFER_SIZE]; + + public: + inline HardwareSerial( + volatile uint8_t *ubrrh, volatile uint8_t *ubrrl, + volatile uint8_t *ucsra, volatile uint8_t *ucsrb, + volatile uint8_t *ucsrc, volatile uint8_t *udr); + void begin(unsigned long baud) { begin(baud, SERIAL_8N1); } + void begin(unsigned long, uint8_t); + void end(); + virtual int available(void); + virtual int peek(void); + virtual int read(void); + virtual void flush(void); + virtual size_t write(uint8_t); + inline size_t write(unsigned long n) { return write((uint8_t)n); } + inline size_t write(long n) { return write((uint8_t)n); } + inline size_t write(unsigned int n) { return write((uint8_t)n); } + inline size_t write(int n) { return write((uint8_t)n); } + using Print::write; // pull in write(str) and write(buf, size) from Print + operator bool() { return true; } + + // Interrupt handlers - Not intended to be called externally + inline void _rx_complete_irq(void); + void _tx_udr_empty_irq(void); +}; + #if defined(UBRRH) || defined(UBRR0H) extern HardwareSerial Serial; -#elif defined(USBCON) - #include "USBAPI.h" -// extern HardwareSerial Serial_; + #define HAVE_HWSERIAL0 #endif #if defined(UBRR1H) extern HardwareSerial Serial1; + #define HAVE_HWSERIAL1 #endif #if defined(UBRR2H) extern HardwareSerial Serial2; + #define HAVE_HWSERIAL2 #endif #if defined(UBRR3H) extern HardwareSerial Serial3; + #define HAVE_HWSERIAL3 #endif extern void serialEventRun(void) __attribute__((weak)); diff --git a/cores/arduino/HardwareSerial0.cpp b/cores/arduino/HardwareSerial0.cpp new file mode 100644 index 0000000..67495ad --- /dev/null +++ b/cores/arduino/HardwareSerial0.cpp @@ -0,0 +1,79 @@ +/* + HardwareSerial0.cpp - Hardware serial library for Wiring + Copyright (c) 2006 Nicholas Zambetti. All right reserved. + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + + Modified 23 November 2006 by David A. Mellis + Modified 28 September 2010 by Mark Sproul + Modified 14 August 2012 by Alarus + Modified 3 December 2013 by Matthijs Kooijman +*/ + +#include "Arduino.h" +#include "HardwareSerial.h" +#include "HardwareSerial_private.h" + +// Each HardwareSerial is defined in its own file, sine the linker pulls +// in the entire file when any element inside is used. --gc-sections can +// additionally cause unused symbols to be dropped, but ISRs have the +// "used" attribute so are never dropped and they keep the +// HardwareSerial instance in as well. Putting each instance in its own +// file prevents the linker from pulling in any unused instances in the +// first place. + +#if defined(HAVE_HWSERIAL0) + +#if defined(USART_RX_vect) + ISR(USART_RX_vect) +#elif defined(USART0_RX_vect) + ISR(USART0_RX_vect) +#elif defined(USART_RXC_vect) + ISR(USART_RXC_vect) // ATmega8 +#else + #error "Don't know what the Data Received vector is called for the first UART" +#endif + { + Serial._rx_complete_irq(); + } + +#if defined(UART0_UDRE_vect) +ISR(UART0_UDRE_vect) +#elif defined(UART_UDRE_vect) +ISR(UART_UDRE_vect) +#elif defined(USART0_UDRE_vect) +ISR(USART0_UDRE_vect) +#elif defined(USART_UDRE_vect) +ISR(USART_UDRE_vect) +#else + #error "Don't know what the Data Register Empty vector is called for the first UART" +#endif +{ + Serial._tx_udr_empty_irq(); +} + +#if defined(UBRRH) && defined(UBRRL) + HardwareSerial Serial(&UBRRH, &UBRRL, &UCSRA, &UCSRB, &UCSRC, &UDR); +#else + HardwareSerial Serial(&UBRR0H, &UBRR0L, &UCSR0A, &UCSR0B, &UCSR0C, &UDR0); +#endif + +// Function that can be weakly referenced by serialEventRun to prevent +// pulling in this file if it's not otherwise used. +bool Serial0_available() { + return Serial.available(); +} + +#endif // HAVE_HWSERIAL0 diff --git a/cores/arduino/HardwareSerial1.cpp b/cores/arduino/HardwareSerial1.cpp new file mode 100644 index 0000000..ec076e7 --- /dev/null +++ b/cores/arduino/HardwareSerial1.cpp @@ -0,0 +1,79 @@ +/* + HardwareSerial1.cpp - Hardware serial library for Wiring + Copyright (c) 2006 Nicholas Zambetti. All right reserved. + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + + Modified 23 November 2006 by David A. Mellis + Modified 28 September 2010 by Mark Sproul + Modified 14 August 2012 by Alarus + Modified 3 December 2013 by Matthijs Kooijman +*/ + +#include "Arduino.h" +#include "HardwareSerial.h" +#include "HardwareSerial_private.h" + +// Each HardwareSerial is defined in its own file, sine the linker pulls +// in the entire file when any element inside is used. --gc-sections can +// additionally cause unused symbols to be dropped, but ISRs have the +// "used" attribute so are never dropped and they keep the +// HardwareSerial instance in as well. Putting each instance in its own +// file prevents the linker from pulling in any unused instances in the +// first place. + +#if defined(HAVE_HWSERIAL1) + +#if defined(USART_RX_vect) + ISR(USART_RX_vect) +#elif defined(USART1_RX_vect) + ISR(USART1_RX_vect) +#elif defined(USART_RXC_vect) + ISR(USART_RXC_vect) // ATmega8 +#else + #error "Don't know what the Data Received vector is called for the first UART" +#endif + { + Serial1._rx_complete_irq(); + } + +#if defined(UART1_UDRE_vect) +ISR(UART1_UDRE_vect) +#elif defined(UART_UDRE_vect) +ISR(UART_UDRE_vect) +#elif defined(USART1_UDRE_vect) +ISR(USART1_UDRE_vect) +#elif defined(USART_UDRE_vect) +ISR(USART_UDRE_vect) +#else + #error "Don't know what the Data Register Empty vector is called for the first UART" +#endif +{ + Serial1._tx_udr_empty_irq(); +} + +#if defined(UBRRH) && defined(UBRRL) + HardwareSerial Serial1(&UBRRH, &UBRRL, &UCSRA, &UCSRB, &UCSRC, &UDR); +#else + HardwareSerial Serial1(&UBRR1H, &UBRR1L, &UCSR1A, &UCSR1B, &UCSR1C, &UDR1); +#endif + +// Function that can be weakly referenced by serialEventRun to prevent +// pulling in this file if it's not otherwise used. +bool Serial1_available() { + return Serial1.available(); +} + +#endif // HAVE_HWSERIAL1 diff --git a/cores/arduino/HardwareSerial2.cpp b/cores/arduino/HardwareSerial2.cpp new file mode 100644 index 0000000..e700770 --- /dev/null +++ b/cores/arduino/HardwareSerial2.cpp @@ -0,0 +1,79 @@ +/* + HardwareSerial2.cpp - Hardware serial library for Wiring + Copyright (c) 2006 Nicholas Zambetti. All right reserved. + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + + Modified 23 November 2006 by David A. Mellis + Modified 28 September 2010 by Mark Sproul + Modified 14 August 2012 by Alarus + Modified 3 December 2013 by Matthijs Kooijman +*/ + +#include "Arduino.h" +#include "HardwareSerial.h" +#include "HardwareSerial_private.h" + +// Each HardwareSerial is defined in its own file, sine the linker pulls +// in the entire file when any element inside is used. --gc-sections can +// additionally cause unused symbols to be dropped, but ISRs have the +// "used" attribute so are never dropped and they keep the +// HardwareSerial instance in as well. Putting each instance in its own +// file prevents the linker from pulling in any unused instances in the +// first place. + +#if defined(HAVE_HWSERIAL2) + +#if defined(USART_RX_vect) + ISR(USART_RX_vect) +#elif defined(USART2_RX_vect) + ISR(USART2_RX_vect) +#elif defined(USART_RXC_vect) + ISR(USART_RXC_vect) // ATmega8 +#else + #error "Don't know what the Data Received vector is called for the first UART" +#endif + { + Serial2._rx_complete_irq(); + } + +#if defined(UART2_UDRE_vect) +ISR(UART2_UDRE_vect) +#elif defined(UART_UDRE_vect) +ISR(UART_UDRE_vect) +#elif defined(USART2_UDRE_vect) +ISR(USART2_UDRE_vect) +#elif defined(USART_UDRE_vect) +ISR(USART_UDRE_vect) +#else + #error "Don't know what the Data Register Empty vector is called for the first UART" +#endif +{ + Serial2._tx_udr_empty_irq(); +} + +#if defined(UBRRH) && defined(UBRRL) + HardwareSerial Serial2(&UBRRH, &UBRRL, &UCSRA, &UCSRB, &UCSRC, &UDR); +#else + HardwareSerial Serial2(&UBRR2H, &UBRR2L, &UCSR2A, &UCSR2B, &UCSR2C, &UDR2); +#endif + +// Function that can be weakly referenced by serialEventRun to prevent +// pulling in this file if it's not otherwise used. +bool Serial2_available() { + return Serial2.available(); +} + +#endif // HAVE_HWSERIAL2 diff --git a/cores/arduino/HardwareSerial3.cpp b/cores/arduino/HardwareSerial3.cpp new file mode 100644 index 0000000..300c4bd --- /dev/null +++ b/cores/arduino/HardwareSerial3.cpp @@ -0,0 +1,79 @@ +/* + HardwareSerial3.cpp - Hardware serial library for Wiring + Copyright (c) 2006 Nicholas Zambetti. All right reserved. + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + + Modified 23 November 2006 by David A. Mellis + Modified 28 September 2010 by Mark Sproul + Modified 14 August 2012 by Alarus + Modified 3 December 2013 by Matthijs Kooijman +*/ + +#include "Arduino.h" +#include "HardwareSerial.h" +#include "HardwareSerial_private.h" + +// Each HardwareSerial is defined in its own file, sine the linker pulls +// in the entire file when any element inside is used. --gc-sections can +// additionally cause unused symbols to be dropped, but ISRs have the +// "used" attribute so are never dropped and they keep the +// HardwareSerial instance in as well. Putting each instance in its own +// file prevents the linker from pulling in any unused instances in the +// first place. + +#if defined(HAVE_HWSERIAL3) + +#if defined(USART_RX_vect) + ISR(USART_RX_vect) +#elif defined(USART3_RX_vect) + ISR(USART3_RX_vect) +#elif defined(USART_RXC_vect) + ISR(USART_RXC_vect) // ATmega8 +#else + #error "Don't know what the Data Received vector is called for the first UART" +#endif + { + Serial3._rx_complete_irq(); + } + +#if defined(UART3_UDRE_vect) +ISR(UART3_UDRE_vect) +#elif defined(UART_UDRE_vect) +ISR(UART_UDRE_vect) +#elif defined(USART3_UDRE_vect) +ISR(USART3_UDRE_vect) +#elif defined(USART_UDRE_vect) +ISR(USART_UDRE_vect) +#else + #error "Don't know what the Data Register Empty vector is called for the first UART" +#endif +{ + Serial3._tx_udr_empty_irq(); +} + +#if defined(UBRRH) && defined(UBRRL) + HardwareSerial Serial3(&UBRRH, &UBRRL, &UCSRA, &UCSRB, &UCSRC, &UDR); +#else + HardwareSerial Serial3(&UBRR3H, &UBRR3L, &UCSR3A, &UCSR3B, &UCSR3C, &UDR3); +#endif + +// Function that can be weakly referenced by serialEventRun to prevent +// pulling in this file if it's not otherwise used. +bool Serial3_available() { + return Serial3.available(); +} + +#endif // HAVE_HWSERIAL3 diff --git a/cores/arduino/HardwareSerial_private.h b/cores/arduino/HardwareSerial_private.h new file mode 100644 index 0000000..ea41028 --- /dev/null +++ b/cores/arduino/HardwareSerial_private.h @@ -0,0 +1,118 @@ +/* + HardwareSerial_private.h - Hardware serial library for Wiring + Copyright (c) 2006 Nicholas Zambetti. All right reserved. + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + + Modified 23 November 2006 by David A. Mellis + Modified 28 September 2010 by Mark Sproul + Modified 14 August 2012 by Alarus +*/ + +#include "wiring_private.h" + +// this next line disables the entire HardwareSerial.cpp, +// this is so I can support Attiny series and any other chip without a uart +#if defined(HAVE_HWSERIAL0) || defined(HAVE_HWSERIAL1) || defined(HAVE_HWSERIAL2) || defined(HAVE_HWSERIAL3) + +// Ensure that the various bit positions we use are available with a 0 +// postfix, so we can always use the values for UART0 for all UARTs. The +// alternative, passing the various values for each UART to the +// HardwareSerial constructor also works, but makes the code bigger and +// slower. +#if !defined(TXC0) +#if defined(TXC) +// On ATmega8, the uart and its bits are not numbered, so there is no TXC0 etc. +#define TXC0 TXC +#define RXEN0 RXEN +#define TXEN0 TXEN +#define RXCIE0 RXCIE +#define UDRIE0 UDRIE +#define U2X0 U2X +#define UPE0 UPE +#define UDRE0 UDRE +#elif defined(TXC1) +// Some devices have uart1 but no uart0 +#define TXC0 TXC1 +#define RXEN0 RXEN1 +#define TXEN0 TXEN1 +#define RXCIE0 RXCIE1 +#define UDRIE0 UDRIE1 +#define U2X0 U2X1 +#define UPE0 UPE1 +#define UDRE0 UDRE1 +#else +#error No UART found in HardwareSerial.cpp +#endif +#endif // !defined TXC0 + +// Check at compiletime that it is really ok to use the bit positions of +// UART0 for the other UARTs as well, in case these values ever get +// changed for future hardware. +#if defined(TXC1) && (TXC1 != TXC0 || RXEN1 != RXEN0 || RXCIE1 != RXCIE0 || \ + UDRIE1 != UDRIE0 || U2X1 != U2X0 || UPE1 != UPE0 || \ + UDRE1 != UDRE0) +#error "Not all bit positions for UART1 are the same as for UART0" +#endif +#if defined(TXC2) && (TXC2 != TXC0 || RXEN2 != RXEN0 || RXCIE2 != RXCIE0 || \ + UDRIE2 != UDRIE0 || U2X2 != U2X0 || UPE2 != UPE0 || \ + UDRE2 != UDRE0) +#error "Not all bit positions for UART2 are the same as for UART0" +#endif +#if defined(TXC3) && (TXC3 != TXC0 || RXEN3 != RXEN0 || RXCIE3 != RXCIE0 || \ + UDRIE3 != UDRIE0 || U3X3 != U3X0 || UPE3 != UPE0 || \ + UDRE3 != UDRE0) +#error "Not all bit positions for UART3 are the same as for UART0" +#endif + +// Constructors //////////////////////////////////////////////////////////////// + +HardwareSerial::HardwareSerial( + volatile uint8_t *ubrrh, volatile uint8_t *ubrrl, + volatile uint8_t *ucsra, volatile uint8_t *ucsrb, + volatile uint8_t *ucsrc, volatile uint8_t *udr) : + _ubrrh(ubrrh), _ubrrl(ubrrl), + _ucsra(ucsra), _ucsrb(ucsrb), _ucsrc(ucsrc), + _udr(udr), + _rx_buffer_head(0), _rx_buffer_tail(0), + _tx_buffer_head(0), _tx_buffer_tail(0) +{ +} + +// Actual interrupt handlers ////////////////////////////////////////////////////////////// + +void HardwareSerial::_rx_complete_irq(void) +{ + if (bit_is_clear(*_ucsra, UPE0)) { + // No Parity error, read byte and store it in the buffer if there is + // room + unsigned char c = *_udr; + rx_buffer_index_t i = (unsigned int)(_rx_buffer_head + 1) % SERIAL_RX_BUFFER_SIZE; + + // if we should be storing the received character into the location + // just before the tail (meaning that the head would advance to the + // current location of the tail), we're about to overflow the buffer + // and so we don't write the character or advance the head. + if (i != _rx_buffer_tail) { + _rx_buffer[_rx_buffer_head] = c; + _rx_buffer_head = i; + } + } else { + // Parity error, read byte but discard it + *_udr; + }; +} + +#endif // whole file diff --git a/cores/arduino/IPAddress.cpp b/cores/arduino/IPAddress.cpp index 3532172..22a0e42 100644 --- a/cores/arduino/IPAddress.cpp +++ b/cores/arduino/IPAddress.cpp @@ -55,7 +55,7 @@ IPAddress& IPAddress::operator=(uint32_t address) return *this; } -bool IPAddress::operator==(const uint8_t* addr) +bool IPAddress::operator==(const uint8_t* addr) const { return memcmp(addr, _address, sizeof(_address)) == 0; } diff --git a/cores/arduino/IPAddress.h b/cores/arduino/IPAddress.h index c2dd7e5..6ea8127 100644 --- a/cores/arduino/IPAddress.h +++ b/cores/arduino/IPAddress.h @@ -20,6 +20,7 @@ #ifndef IPAddress_h #define IPAddress_h +#include <stdint.h> #include <Printable.h> // A class to make it easier to handle and pass around IP addresses @@ -42,9 +43,9 @@ public: // Overloaded cast operator to allow IPAddress objects to be used where a pointer // to a four-byte uint8_t array is expected - operator uint32_t() { return *((uint32_t*)_address); }; - bool operator==(const IPAddress& addr) { return (*((uint32_t*)_address)) == (*((uint32_t*)addr._address)); }; - bool operator==(const uint8_t* addr); + operator uint32_t() const { return *((uint32_t*)_address); }; + bool operator==(const IPAddress& addr) const { return (*((uint32_t*)_address)) == (*((uint32_t*)addr._address)); }; + bool operator==(const uint8_t* addr) const; // Overloaded index operator to allow getting and setting individual octets of the address uint8_t operator[](int index) const { return _address[index]; }; diff --git a/cores/arduino/Print.cpp b/cores/arduino/Print.cpp index 53961ec..5df5630 100755..100644 --- a/cores/arduino/Print.cpp +++ b/cores/arduino/Print.cpp @@ -41,7 +41,7 @@ size_t Print::write(const uint8_t *buffer, size_t size) size_t Print::print(const __FlashStringHelper *ifsh) { - const char PROGMEM *p = (const char PROGMEM *)ifsh; + PGM_P p = reinterpret_cast<PGM_P>(ifsh); size_t n = 0; while (1) { unsigned char c = pgm_read_byte(p++); @@ -53,11 +53,7 @@ size_t Print::print(const __FlashStringHelper *ifsh) size_t Print::print(const String &s) { - size_t n = 0; - for (uint16_t i = 0; i < s.length(); i++) { - n += write(s[i]); - } - return n; + return write(s.c_str(), s.length()); } size_t Print::print(const char str[]) diff --git a/cores/arduino/Print.h b/cores/arduino/Print.h index dc76150..7b53aa4 100755..100644 --- a/cores/arduino/Print.h +++ b/cores/arduino/Print.h @@ -51,6 +51,9 @@ class Print return write((const uint8_t *)str, strlen(str)); } virtual size_t write(const uint8_t *buffer, size_t size); + size_t write(const char *buffer, size_t size) { + return write((const uint8_t *)buffer, size); + } size_t print(const __FlashStringHelper *); size_t print(const String &); diff --git a/cores/arduino/Stream.h b/cores/arduino/Stream.h index 007b4bc..5cf5ddf 100644 --- a/cores/arduino/Stream.h +++ b/cores/arduino/Stream.h @@ -57,14 +57,18 @@ class Stream : public Print void setTimeout(unsigned long timeout); // sets maximum milliseconds to wait for stream data, default is 1 second bool find(char *target); // reads data from the stream until the target string is found + bool find(uint8_t *target) { return find ((char *)target); } // returns true if target string is found, false if timed out (see setTimeout) bool find(char *target, size_t length); // reads data from the stream until the target string of given length is found + bool find(uint8_t *target, size_t length) { return find ((char *)target, length); } // returns true if target string is found, false if timed out bool findUntil(char *target, char *terminator); // as find but search ends if the terminator string is found + bool findUntil(uint8_t *target, char *terminator) { return findUntil((char *)target, terminator); } bool findUntil(char *target, size_t targetLen, char *terminate, size_t termLen); // as above but search ends if the terminate string is found + bool findUntil(uint8_t *target, size_t targetLen, char *terminate, size_t termLen) {return findUntil((char *)target, targetLen, terminate, termLen); } long parseInt(); // returns the first valid (long) integer value from the current position. @@ -74,10 +78,12 @@ class Stream : public Print float parseFloat(); // float version of parseInt size_t readBytes( char *buffer, size_t length); // read chars from stream into buffer + size_t readBytes( uint8_t *buffer, size_t length) { return readBytes((char *)buffer, length); } // terminates if length characters have been read or timeout (see setTimeout) // returns the number of characters placed in the buffer (0 means no valid data found) size_t readBytesUntil( char terminator, char *buffer, size_t length); // as readBytes with terminator character + size_t readBytesUntil( char terminator, uint8_t *buffer, size_t length) { return readBytesUntil(terminator, (char *)buffer, length); } // terminates if length characters have been read, timeout, or if the terminator character detected // returns the number of characters placed in the buffer (0 means no valid data found) diff --git a/cores/arduino/Tone.cpp b/cores/arduino/Tone.cpp index 9bb6fe7..9bb6fe7 100755..100644 --- a/cores/arduino/Tone.cpp +++ b/cores/arduino/Tone.cpp diff --git a/cores/arduino/USBAPI.h b/cores/arduino/USBAPI.h index 7a14285..5a33002 100644 --- a/cores/arduino/USBAPI.h +++ b/cores/arduino/USBAPI.h @@ -25,10 +25,16 @@ extern USBDevice_ USBDevice; //================================================================================ // Serial over CDC (Serial1 is the physical port) +struct ring_buffer; + +#if (RAMEND < 1000) +#define SERIAL_BUFFER_SIZE 16 +#else +#define SERIAL_BUFFER_SIZE 64 +#endif + class Serial_ : public Stream { -private: - ring_buffer *_cdc_rx_buffer; public: void begin(unsigned long); void begin(unsigned long, uint8_t); @@ -42,9 +48,15 @@ public: virtual size_t write(uint8_t); using Print::write; // pull in write(str) and write(buf, size) from Print operator bool(); + + volatile uint8_t _rx_buffer_head; + volatile uint8_t _rx_buffer_tail; + unsigned char _rx_buffer[SERIAL_BUFFER_SIZE]; }; extern Serial_ Serial; +#define HAVE_CDCSERIAL + //================================================================================ //================================================================================ // Mouse diff --git a/cores/arduino/USBCore.cpp b/cores/arduino/USBCore.cpp index d3e0170..c46c75f 100644 --- a/cores/arduino/USBCore.cpp +++ b/cores/arduino/USBCore.cpp @@ -39,8 +39,8 @@ volatile u8 RxLEDPulse; /**< Milliseconds remaining for data Rx LED pulse */ //================================================================== extern const u16 STRING_LANGUAGE[] PROGMEM; -extern const u16 STRING_IPRODUCT[] PROGMEM; -extern const u16 STRING_IMANUFACTURER[] PROGMEM; +extern const u8 STRING_PRODUCT[] PROGMEM; +extern const u8 STRING_MANUFACTURER[] PROGMEM; extern const DeviceDescriptor USB_DeviceDescriptor PROGMEM; extern const DeviceDescriptor USB_DeviceDescriptorA PROGMEM; @@ -49,31 +49,24 @@ const u16 STRING_LANGUAGE[2] = { 0x0409 // English }; -const u16 STRING_IPRODUCT[17] = { - (3<<8) | (2+2*16), -#if USB_PID == 0x8036 - 'A','r','d','u','i','n','o',' ','L','e','o','n','a','r','d','o' -#elif USB_PID == 0x8037 - 'A','r','d','u','i','n','o',' ','M','i','c','r','o',' ',' ',' ' -#elif USB_PID == 0x803C - 'A','r','d','u','i','n','o',' ','E','s','p','l','o','r','a',' ' -#elif USB_PID == 0x9208 - 'L','i','l','y','P','a','d','U','S','B',' ',' ',' ',' ',' ',' ' -#else - 'U','S','B',' ','I','O',' ','B','o','a','r','d',' ',' ',' ',' ' +#ifndef USB_PRODUCT +// If no product is provided, use USB IO Board +#define USB_PRODUCT "USB IO Board" #endif -}; -const u16 STRING_IMANUFACTURER[12] = { - (3<<8) | (2+2*11), +const u8 STRING_PRODUCT[] PROGMEM = USB_PRODUCT; + #if USB_VID == 0x2341 - 'A','r','d','u','i','n','o',' ','L','L','C' +#define USB_MANUFACTURER "Arduino LLC" #elif USB_VID == 0x1b4f - 'S','p','a','r','k','F','u','n',' ',' ',' ' -#else - 'U','n','k','n','o','w','n',' ',' ',' ',' ' +#define USB_MANUFACTURER "SparkFun" +#elif !defined(USB_MANUFACTURER) +// Fall through to unknown if no manufacturer name was provided in a macro +#define USB_MANUFACTURER "Unknown" #endif -}; + +const u8 STRING_MANUFACTURER[] PROGMEM = USB_MANUFACTURER; + #ifdef CDC_ENABLED #define DEVICE_CLASS 0x02 @@ -416,6 +409,22 @@ int USB_SendControl(u8 flags, const void* d, int len) return sent; } +// Send a USB descriptor string. The string is stored in PROGMEM as a +// plain ASCII string but is sent out as UTF-16 with the correct 2-byte +// prefix +static bool USB_SendStringDescriptor(const u8*string_P, u8 string_len) { + SendControl(2 + string_len * 2); + SendControl(3); + for(u8 i = 0; i < string_len; i++) { + bool r = SendControl(pgm_read_byte(&string_P[i])); + r &= SendControl(0); // high byte + if(!r) { + return false; + } + } + return true; +} + // Does not timeout or cross fifo boundaries // Will only work for transfers <= 64 bytes // TODO @@ -476,7 +485,6 @@ bool SendDescriptor(Setup& setup) return HID_GetDescriptor(t); #endif - u8 desc_length = 0; const u8* desc_addr = 0; if (USB_DEVICE_DESCRIPTOR_TYPE == t) { @@ -486,20 +494,22 @@ bool SendDescriptor(Setup& setup) } else if (USB_STRING_DESCRIPTOR_TYPE == t) { - if (setup.wValueL == 0) + if (setup.wValueL == 0) { desc_addr = (const u8*)&STRING_LANGUAGE; - else if (setup.wValueL == IPRODUCT) - desc_addr = (const u8*)&STRING_IPRODUCT; - else if (setup.wValueL == IMANUFACTURER) - desc_addr = (const u8*)&STRING_IMANUFACTURER; + } + else if (setup.wValueL == IPRODUCT) { + return USB_SendStringDescriptor(STRING_PRODUCT, strlen(USB_PRODUCT)); + } + else if (setup.wValueL == IMANUFACTURER) { + return USB_SendStringDescriptor(STRING_MANUFACTURER, strlen(USB_MANUFACTURER)); + } else return false; } if (desc_addr == 0) return false; - if (desc_length == 0) - desc_length = pgm_read_byte(desc_addr); + u8 desc_length = pgm_read_byte(desc_addr); USB_SendControl(TRANSFER_PGM,desc_addr,desc_length); return true; diff --git a/cores/arduino/hooks.c b/cores/arduino/hooks.c new file mode 100644 index 0000000..641eabc --- /dev/null +++ b/cores/arduino/hooks.c @@ -0,0 +1,31 @@ +/* + Copyright (c) 2012 Arduino. All right reserved. + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 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 Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +*/ + +/** + * Empty yield() hook. + * + * This function is intended to be used by library writers to build + * libraries or sketches that supports cooperative threads. + * + * Its defined as a weak symbol and it can be redefined to implement a + * real cooperative scheduler. + */ +static void __empty() { + // Empty +} +void yield(void) __attribute__ ((weak, alias("__empty"))); diff --git a/cores/arduino/wiring.c b/cores/arduino/wiring.c index a3c4390..5cbe241 100644 --- a/cores/arduino/wiring.c +++ b/cores/arduino/wiring.c @@ -111,6 +111,7 @@ void delay(unsigned long ms) uint16_t start = (uint16_t)micros(); while (ms > 0) { + yield(); if (((uint16_t)micros() - start) >= 1000) { ms--; start += 1000; diff --git a/cores/arduino/wiring_private.h b/cores/arduino/wiring_private.h index c366005..c366005 100755..100644 --- a/cores/arduino/wiring_private.h +++ b/cores/arduino/wiring_private.h diff --git a/cores/arduino/wiring_pulse.c b/cores/arduino/wiring_pulse.c index 0d96886..0d96886 100755..100644 --- a/cores/arduino/wiring_pulse.c +++ b/cores/arduino/wiring_pulse.c diff --git a/cores/arduino/wiring_shift.c b/cores/arduino/wiring_shift.c index cfe7867..cfe7867 100755..100644 --- a/cores/arduino/wiring_shift.c +++ b/cores/arduino/wiring_shift.c |