diff options
Diffstat (limited to 'bootloaders/caterina_LUFA/Caterina.c')
| -rwxr-xr-x | bootloaders/caterina_LUFA/Caterina.c | 698 |
1 files changed, 698 insertions, 0 deletions
diff --git a/bootloaders/caterina_LUFA/Caterina.c b/bootloaders/caterina_LUFA/Caterina.c new file mode 100755 index 0000000..d4dbb7b --- /dev/null +++ b/bootloaders/caterina_LUFA/Caterina.c @@ -0,0 +1,698 @@ +/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2011.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.lufa-lib.org
+*/
+
+/*
+ Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com)
+
+ Permission to use, copy, modify, distribute, and sell this
+ software and its documentation for any purpose is hereby granted
+ without fee, provided that the above copyright notice appear in
+ all copies and that both that the copyright notice and this
+ permission notice and warranty disclaimer appear in supporting
+ documentation, and that the name of the author not be used in
+ advertising or publicity pertaining to distribution of the
+ software without specific, written prior permission.
+
+ The author disclaim all warranties with regard to this
+ software, including all implied warranties of merchantability
+ and fitness. In no event shall the author be liable for any
+ special, indirect or consequential damages or any damages
+ whatsoever resulting from loss of use, data or profits, whether
+ in an action of contract, negligence or other tortious action,
+ arising out of or in connection with the use or performance of
+ this software.
+*/
+
+/** \file
+ *
+ * Main source file for the CDC class bootloader. This file contains the complete bootloader logic.
+ */
+
+#define INCLUDE_FROM_CATERINA_C
+#include "Caterina.h"
+
+/** Contains the current baud rate and other settings of the first virtual serial port. This must be retained as some
+ * operating systems will not open the port unless the settings can be set successfully.
+ */
+static CDC_LineEncoding_t LineEncoding = { .BaudRateBPS = 0,
+ .CharFormat = CDC_LINEENCODING_OneStopBit,
+ .ParityType = CDC_PARITY_None,
+ .DataBits = 8 };
+
+/** Current address counter. This stores the current address of the FLASH or EEPROM as set by the host,
+ * and is used when reading or writing to the AVRs memory (either FLASH or EEPROM depending on the issued
+ * command.)
+ */
+static uint32_t CurrAddress;
+
+/** Flag to indicate if the bootloader should be running, or should exit and allow the application code to run
+ * via a watchdog reset. When cleared the bootloader will exit, starting the watchdog and entering an infinite
+ * loop until the AVR restarts and the application runs.
+ */
+static bool RunBootloader = true;
+
+/* Pulse generation counters to keep track of the time remaining for each pulse type */
+#define TX_RX_LED_PULSE_PERIOD 100
+uint16_t TxLEDPulse = 0; // time remaining for Tx LED pulse
+uint16_t RxLEDPulse = 0; // time remaining for Rx LED pulse
+
+/* Bootloader timeout timer */
+uint16_t Timeout = 0;
+
+uint16_t bootKey = 0x7777;
+volatile uint16_t *const bootKeyPtr = (volatile uint16_t *)0x0A00;
+
+void StartSketch(void)
+{
+ cli();
+
+ /* Undo TIMER1 setup and clear the count before running the sketch */
+ TIMSK1 = 0;
+ TCCR1B = 0;
+ TCNT1H = 0; // 16-bit write to TCNT1 requires high byte be written first
+ TCNT1L = 0;
+
+ /* Relocate the interrupt vector table to the application section */
+ MCUCR = (1 << IVCE);
+ MCUCR = 0;
+
+ L_LED_OFF();
+ TX_LED_OFF();
+ RX_LED_OFF();
+
+ /* jump to beginning of application space */
+ __asm__ volatile("jmp 0x0000");
+}
+
+/* Breathing animation on L LED indicates bootloader is running */
+uint16_t LLEDPulse;
+void LEDPulse(void)
+{
+ LLEDPulse++;
+ uint8_t p = LLEDPulse >> 8;
+ if (p > 127)
+ p = 254-p;
+ p += p;
+ if (((uint8_t)LLEDPulse) > p)
+ L_LED_OFF();
+ else
+ L_LED_ON();
+}
+
+/** Main program entry point. This routine configures the hardware required by the bootloader, then continuously
+ * runs the bootloader processing routine until instructed to soft-exit, or hard-reset via the watchdog to start
+ * the loaded application code.
+ */
+int main(void)
+{
+ /* Watchdog may be configured with a 15 ms period so must disable it before doing anything else */
+ wdt_disable();
+
+ /* Check the reason for the reset and act accordingly */
+ uint8_t mcusr_state = MCUSR; // store the initial state of the Status register
+ MCUSR = 0; // clear all reset flags
+ // After a power-on reset skip the bootloader and jump straight to sketch
+ // if one exists.
+ if (mcusr_state & (1<<PORF) && pgm_read_word(0) != 0xFFFF) {
+ StartSketch();
+ }
+ uint16_t bootKeyPtrVal = *bootKeyPtr;
+ *bootKeyPtr = 0;
+ if ((mcusr_state & (1<<WDRF)) && (bootKeyPtrVal != bootKey) && (pgm_read_word(0) != 0xFFFF)) {
+ StartSketch();
+ }
+
+ /* Setup hardware required for the bootloader */
+ SetupHardware();
+
+ /* Enable global interrupts so that the USB stack can function */
+ sei();
+
+ while (RunBootloader)
+ {
+ CDC_Task();
+ USB_USBTask();
+ /* Time out and start the sketch if one is present */
+ if (Timeout > 16000 && pgm_read_word(0) != 0xFFFF)
+ RunBootloader = false;
+
+ LEDPulse();
+ }
+
+ /* Disconnect from the host - USB interface will be reset later along with the AVR */
+ USB_Detach();
+
+ /* Jump to beginning of application space to run the sketch - do not reset */
+ StartSketch();
+}
+
+/** Configures all hardware required for the bootloader. */
+void SetupHardware(void)
+{
+ /* Disable watchdog if enabled by bootloader/fuses */
+ MCUSR &= ~(1 << WDRF);
+ wdt_disable();
+
+ /* Disable clock division */
+ clock_prescale_set(clock_div_1);
+
+ /* Relocate the interrupt vector table to the bootloader section */
+ MCUCR = (1 << IVCE);
+ MCUCR = (1 << IVSEL);
+
+ LED_SETUP();
+ CPU_PRESCALE(0);
+ L_LED_OFF();
+ TX_LED_OFF();
+ RX_LED_OFF();
+
+ /* Initialize TIMER1 to handle bootloader timeout and LED tasks.
+ * With 16 MHz clock and 1/64 prescaler, timer 1 is clocked at 250 kHz
+ * Our chosen compare match generates an interrupt every 1 ms.
+ * This interrupt is disabled selectively when doing memory reading, erasing,
+ * or writing since SPM has tight timing requirements.
+ */
+ OCR1AH = 0;
+ OCR1AL = 250;
+ TIMSK1 = (1 << OCIE1A); // enable timer 1 output compare A match interrupt
+ TCCR1B = ((1 << CS11) | (1 << CS10)); // 1/64 prescaler on timer 1 input
+
+ /* Initialize USB Subsystem */
+ USB_Init();
+}
+
+//uint16_t ctr = 0;
+ISR(TIMER1_COMPA_vect, ISR_BLOCK)
+{
+ /* Reset counter */
+ TCNT1H = 0;
+ TCNT1L = 0;
+
+ /* Check whether the TX or RX LED one-shot period has elapsed. if so, turn off the LED */
+ if (TxLEDPulse && !(--TxLEDPulse))
+ TX_LED_OFF();
+ if (RxLEDPulse && !(--RxLEDPulse))
+ RX_LED_OFF();
+
+ if (pgm_read_word(0) != 0xFFFF)
+ Timeout++;
+}
+
+/** Event handler for the USB_ConfigurationChanged event. This configures the device's endpoints ready
+ * to relay data to and from the attached USB host.
+ */
+void EVENT_USB_Device_ConfigurationChanged(void)
+{
+ /* Setup CDC Notification, Rx and Tx Endpoints */
+ Endpoint_ConfigureEndpoint(CDC_NOTIFICATION_EPNUM, EP_TYPE_INTERRUPT,
+ ENDPOINT_DIR_IN, CDC_NOTIFICATION_EPSIZE,
+ ENDPOINT_BANK_SINGLE);
+
+ Endpoint_ConfigureEndpoint(CDC_TX_EPNUM, EP_TYPE_BULK,
+ ENDPOINT_DIR_IN, CDC_TXRX_EPSIZE,
+ ENDPOINT_BANK_SINGLE);
+
+ Endpoint_ConfigureEndpoint(CDC_RX_EPNUM, EP_TYPE_BULK,
+ ENDPOINT_DIR_OUT, CDC_TXRX_EPSIZE,
+ ENDPOINT_BANK_SINGLE);
+}
+
+/** Event handler for the USB_ControlRequest event. This is used to catch and process control requests sent to
+ * the device from the USB host before passing along unhandled control requests to the library for processing
+ * internally.
+ */
+void EVENT_USB_Device_ControlRequest(void)
+{
+ /* Ignore any requests that aren't directed to the CDC interface */
+ if ((USB_ControlRequest.bmRequestType & (CONTROL_REQTYPE_TYPE | CONTROL_REQTYPE_RECIPIENT)) !=
+ (REQTYPE_CLASS | REQREC_INTERFACE))
+ {
+ return;
+ }
+
+ /* Process CDC specific control requests */
+ switch (USB_ControlRequest.bRequest)
+ {
+ case CDC_REQ_GetLineEncoding:
+ if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
+ {
+ Endpoint_ClearSETUP();
+
+ /* Write the line coding data to the control endpoint */
+ Endpoint_Write_Control_Stream_LE(&LineEncoding, sizeof(CDC_LineEncoding_t));
+ Endpoint_ClearOUT();
+ }
+
+ break;
+ case CDC_REQ_SetLineEncoding:
+ if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
+ {
+ Endpoint_ClearSETUP();
+
+ /* Read the line coding data in from the host into the global struct */
+ Endpoint_Read_Control_Stream_LE(&LineEncoding, sizeof(CDC_LineEncoding_t));
+ Endpoint_ClearIN();
+ }
+
+ break;
+ }
+}
+
+#if !defined(NO_BLOCK_SUPPORT)
+/** Reads or writes a block of EEPROM or FLASH memory to or from the appropriate CDC data endpoint, depending
+ * on the AVR910 protocol command issued.
+ *
+ * \param[in] Command Single character AVR910 protocol command indicating what memory operation to perform
+ */
+static void ReadWriteMemoryBlock(const uint8_t Command)
+{
+ uint16_t BlockSize;
+ char MemoryType;
+
+ bool HighByte = false;
+ uint8_t LowByte = 0;
+
+ BlockSize = (FetchNextCommandByte() << 8);
+ BlockSize |= FetchNextCommandByte();
+
+ MemoryType = FetchNextCommandByte();
+
+ if ((MemoryType != 'E') && (MemoryType != 'F'))
+ {
+ /* Send error byte back to the host */
+ WriteNextResponseByte('?');
+
+ return;
+ }
+
+ /* Disable timer 1 interrupt - can't afford to process nonessential interrupts
+ * while doing SPM tasks */
+ TIMSK1 = 0;
+
+ /* Check if command is to read memory */
+ if (Command == 'g')
+ {
+ /* Re-enable RWW section */
+ boot_rww_enable();
+
+ while (BlockSize--)
+ {
+ if (MemoryType == 'F')
+ {
+ /* Read the next FLASH byte from the current FLASH page */
+ #if (FLASHEND > 0xFFFF)
+ WriteNextResponseByte(pgm_read_byte_far(CurrAddress | HighByte));
+ #else
+ WriteNextResponseByte(pgm_read_byte(CurrAddress | HighByte));
+ #endif
+
+ /* If both bytes in current word have been read, increment the address counter */
+ if (HighByte)
+ CurrAddress += 2;
+
+ HighByte = !HighByte;
+ }
+ else
+ {
+ /* Read the next EEPROM byte into the endpoint */
+ WriteNextResponseByte(eeprom_read_byte((uint8_t*)(intptr_t)(CurrAddress >> 1)));
+
+ /* Increment the address counter after use */
+ CurrAddress += 2;
+ }
+ }
+ }
+ else
+ {
+ uint32_t PageStartAddress = CurrAddress;
+
+ if (MemoryType == 'F')
+ {
+ boot_page_erase(PageStartAddress);
+ boot_spm_busy_wait();
+ }
+
+ while (BlockSize--)
+ {
+ if (MemoryType == 'F')
+ {
+ /* If both bytes in current word have been written, increment the address counter */
+ if (HighByte)
+ {
+ /* Write the next FLASH word to the current FLASH page */
+ boot_page_fill(CurrAddress, ((FetchNextCommandByte() << 8) | LowByte));
+
+ /* Increment the address counter after use */
+ CurrAddress += 2;
+ }
+ else
+ {
+ LowByte = FetchNextCommandByte();
+ }
+
+ HighByte = !HighByte;
+ }
+ else
+ {
+ /* Write the next EEPROM byte from the endpoint */
+ eeprom_write_byte((uint8_t*)((intptr_t)(CurrAddress >> 1)), FetchNextCommandByte());
+
+ /* Increment the address counter after use */
+ CurrAddress += 2;
+ }
+ }
+
+ /* If in FLASH programming mode, commit the page after writing */
+ if (MemoryType == 'F')
+ {
+ /* Commit the flash page to memory */
+ boot_page_write(PageStartAddress);
+
+ /* Wait until write operation has completed */
+ boot_spm_busy_wait();
+ }
+
+ /* Send response byte back to the host */
+ WriteNextResponseByte('\r');
+ }
+
+ /* Re-enable timer 1 interrupt disabled earlier in this routine */
+ TIMSK1 = (1 << OCIE1A);
+}
+#endif
+
+/** Retrieves the next byte from the host in the CDC data OUT endpoint, and clears the endpoint bank if needed
+ * to allow reception of the next data packet from the host.
+ *
+ * \return Next received byte from the host in the CDC data OUT endpoint
+ */
+static uint8_t FetchNextCommandByte(void)
+{
+ /* Select the OUT endpoint so that the next data byte can be read */
+ Endpoint_SelectEndpoint(CDC_RX_EPNUM);
+
+ /* If OUT endpoint empty, clear it and wait for the next packet from the host */
+ while (!(Endpoint_IsReadWriteAllowed()))
+ {
+ Endpoint_ClearOUT();
+
+ while (!(Endpoint_IsOUTReceived()))
+ {
+ if (USB_DeviceState == DEVICE_STATE_Unattached)
+ return 0;
+ }
+ }
+
+ /* Fetch the next byte from the OUT endpoint */
+ return Endpoint_Read_8();
+}
+
+/** Writes the next response byte to the CDC data IN endpoint, and sends the endpoint back if needed to free up the
+ * bank when full ready for the next byte in the packet to the host.
+ *
+ * \param[in] Response Next response byte to send to the host
+ */
+static void WriteNextResponseByte(const uint8_t Response)
+{
+ /* Select the IN endpoint so that the next data byte can be written */
+ Endpoint_SelectEndpoint(CDC_TX_EPNUM);
+
+ /* If IN endpoint full, clear it and wait until ready for the next packet to the host */
+ if (!(Endpoint_IsReadWriteAllowed()))
+ {
+ Endpoint_ClearIN();
+
+ while (!(Endpoint_IsINReady()))
+ {
+ if (USB_DeviceState == DEVICE_STATE_Unattached)
+ return;
+ }
+ }
+
+ /* Write the next byte to the IN endpoint */
+ Endpoint_Write_8(Response);
+
+ TX_LED_ON();
+ TxLEDPulse = TX_RX_LED_PULSE_PERIOD;
+}
+
+#define STK_OK 0x10
+#define STK_INSYNC 0x14 // ' '
+#define CRC_EOP 0x20 // 'SPACE'
+#define STK_GET_SYNC 0x30 // '0'
+
+#define STK_GET_PARAMETER 0x41 // 'A'
+#define STK_SET_DEVICE 0x42 // 'B'
+#define STK_SET_DEVICE_EXT 0x45 // 'E'
+#define STK_LOAD_ADDRESS 0x55 // 'U'
+#define STK_UNIVERSAL 0x56 // 'V'
+#define STK_PROG_PAGE 0x64 // 'd'
+#define STK_READ_PAGE 0x74 // 't'
+#define STK_READ_SIGN 0x75 // 'u'
+
+/** Task to read in AVR910 commands from the CDC data OUT endpoint, process them, perform the required actions
+ * and send the appropriate response back to the host.
+ */
+void CDC_Task(void)
+{
+ /* Select the OUT endpoint */
+ Endpoint_SelectEndpoint(CDC_RX_EPNUM);
+
+ /* Check if endpoint has a command in it sent from the host */
+ if (!(Endpoint_IsOUTReceived()))
+ return;
+
+ RX_LED_ON();
+ RxLEDPulse = TX_RX_LED_PULSE_PERIOD;
+
+ /* Read in the bootloader command (first byte sent from host) */
+ uint8_t Command = FetchNextCommandByte();
+
+ if (Command == 'E')
+ {
+ RunBootloader = false;
+
+ // Send confirmation byte back to the host
+ WriteNextResponseByte('\r');
+ }
+ else if (Command == 'T')
+ {
+ FetchNextCommandByte();
+
+ // Send confirmation byte back to the host
+ WriteNextResponseByte('\r');
+ }
+ else if ((Command == 'L') || (Command == 'P'))
+ {
+ // Send confirmation byte back to the host
+ WriteNextResponseByte('\r');
+ }
+ else if (Command == 't')
+ {
+ // Return ATMEGA128 part code - this is only to allow AVRProg to use the bootloader
+ WriteNextResponseByte(0x44);
+ WriteNextResponseByte(0x00);
+ }
+ else if (Command == 'a')
+ {
+ // Indicate auto-address increment is supported
+ WriteNextResponseByte('Y');
+ }
+ else if (Command == 'A')
+ {
+ // Set the current address to that given by the host
+ CurrAddress = (FetchNextCommandByte() << 9);
+ CurrAddress |= (FetchNextCommandByte() << 1);
+
+ // Send confirmation byte back to the host
+ WriteNextResponseByte('\r');
+ }
+ else if (Command == 'p')
+ {
+ // Indicate serial programmer back to the host
+ WriteNextResponseByte('S');
+ }
+ else if (Command == 'S')
+ {
+ // Write the 7-byte software identifier to the endpoint
+ for (uint8_t CurrByte = 0; CurrByte < 7; CurrByte++)
+ WriteNextResponseByte(SOFTWARE_IDENTIFIER[CurrByte]);
+ }
+ else if (Command == 'V')
+ {
+ WriteNextResponseByte('0' + BOOTLOADER_VERSION_MAJOR);
+ WriteNextResponseByte('0' + BOOTLOADER_VERSION_MINOR);
+ }
+ else if (Command == 's')
+ {
+ WriteNextResponseByte(AVR_SIGNATURE_3);
+ WriteNextResponseByte(AVR_SIGNATURE_2);
+ WriteNextResponseByte(AVR_SIGNATURE_1);
+ }
+ else if (Command == 'e')
+ {
+ // Clear the application section of flash
+ for (uint32_t CurrFlashAddress = 0; CurrFlashAddress < BOOT_START_ADDR; CurrFlashAddress += SPM_PAGESIZE)
+ {
+ boot_page_erase(CurrFlashAddress);
+ boot_spm_busy_wait();
+ boot_page_write(CurrFlashAddress);
+ boot_spm_busy_wait();
+ }
+
+ // Send confirmation byte back to the host
+ WriteNextResponseByte('\r');
+ }
+ #if !defined(NO_LOCK_BYTE_WRITE_SUPPORT)
+ else if (Command == 'l')
+ {
+ // Set the lock bits to those given by the host
+ boot_lock_bits_set(FetchNextCommandByte());
+
+ // Send confirmation byte back to the host
+ WriteNextResponseByte('\r');
+ }
+ #endif
+ else if (Command == 'r')
+ {
+ WriteNextResponseByte(boot_lock_fuse_bits_get(GET_LOCK_BITS));
+ }
+ else if (Command == 'F')
+ {
+ WriteNextResponseByte(boot_lock_fuse_bits_get(GET_LOW_FUSE_BITS));
+ }
+ else if (Command == 'N')
+ {
+ WriteNextResponseByte(boot_lock_fuse_bits_get(GET_HIGH_FUSE_BITS));
+ }
+ else if (Command == 'Q')
+ {
+ WriteNextResponseByte(boot_lock_fuse_bits_get(GET_EXTENDED_FUSE_BITS));
+ }
+ #if !defined(NO_BLOCK_SUPPORT)
+ else if (Command == 'b')
+ {
+ WriteNextResponseByte('Y');
+
+ // Send block size to the host
+ WriteNextResponseByte(SPM_PAGESIZE >> 8);
+ WriteNextResponseByte(SPM_PAGESIZE & 0xFF);
+ }
+ else if ((Command == 'B') || (Command == 'g'))
+ {
+ Timeout = 0;
+ // Delegate the block write/read to a separate function for clarity
+ ReadWriteMemoryBlock(Command);
+ }
+ #endif
+ #if !defined(NO_FLASH_BYTE_SUPPORT)
+ else if (Command == 'C')
+ {
+ // Write the high byte to the current flash page
+ boot_page_fill(CurrAddress, FetchNextCommandByte());
+
+ // Send confirmation byte back to the host
+ WriteNextResponseByte('\r');
+ }
+ else if (Command == 'c')
+ {
+ // Write the low byte to the current flash page
+ boot_page_fill(CurrAddress | 0x01, FetchNextCommandByte());
+
+ // Increment the address
+ CurrAddress += 2;
+
+ // Send confirmation byte back to the host
+ WriteNextResponseByte('\r');
+ }
+ else if (Command == 'm')
+ {
+ // Commit the flash page to memory
+ boot_page_write(CurrAddress);
+
+ // Wait until write operation has completed
+ boot_spm_busy_wait();
+
+ // Send confirmation byte back to the host
+ WriteNextResponseByte('\r');
+ }
+ else if (Command == 'R')
+ {
+ #if (FLASHEND > 0xFFFF)
+ uint16_t ProgramWord = pgm_read_word_far(CurrAddress);
+ #else
+ uint16_t ProgramWord = pgm_read_word(CurrAddress);
+ #endif
+
+ WriteNextResponseByte(ProgramWord >> 8);
+ WriteNextResponseByte(ProgramWord & 0xFF);
+ }
+ #endif
+ #if !defined(NO_EEPROM_BYTE_SUPPORT)
+ else if (Command == 'D')
+ {
+ // Read the byte from the endpoint and write it to the EEPROM
+ eeprom_write_byte((uint8_t*)((intptr_t)(CurrAddress >> 1)), FetchNextCommandByte());
+
+ // Increment the address after use
+ CurrAddress += 2;
+
+ // Send confirmation byte back to the host
+ WriteNextResponseByte('\r');
+ }
+ else if (Command == 'd')
+ {
+ // Read the EEPROM byte and write it to the endpoint
+ WriteNextResponseByte(eeprom_read_byte((uint8_t*)((intptr_t)(CurrAddress >> 1))));
+
+ // Increment the address after use
+ CurrAddress += 2;
+ }
+ #endif
+ else if (Command != 27)
+ {
+ // Unknown (non-sync) command, return fail code
+ WriteNextResponseByte('?');
+ }
+
+
+ /* Select the IN endpoint */
+ Endpoint_SelectEndpoint(CDC_TX_EPNUM);
+
+ /* Remember if the endpoint is completely full before clearing it */
+ bool IsEndpointFull = !(Endpoint_IsReadWriteAllowed());
+
+ /* Send the endpoint data to the host */
+ Endpoint_ClearIN();
+
+ /* If a full endpoint's worth of data was sent, we need to send an empty packet afterwards to signal end of transfer */
+ if (IsEndpointFull)
+ {
+ while (!(Endpoint_IsINReady()))
+ {
+ if (USB_DeviceState == DEVICE_STATE_Unattached)
+ return;
+ }
+
+ Endpoint_ClearIN();
+ }
+
+ /* Wait until the data has been sent to the host */
+ while (!(Endpoint_IsINReady()))
+ {
+ if (USB_DeviceState == DEVICE_STATE_Unattached)
+ return;
+ }
+
+ /* Select the OUT endpoint */
+ Endpoint_SelectEndpoint(CDC_RX_EPNUM);
+
+ /* Acknowledge the command from the host */
+ Endpoint_ClearOUT();
+}
+
|