mirror of
https://github.com/arduino/Arduino.git
synced 2024-12-05 16:24:12 +01:00
715 lines
21 KiB
C
Executable File
715 lines
21 KiB
C
Executable File
/*
|
|
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 */
|
|
#define TIMEOUT_PERIOD 8000
|
|
uint16_t Timeout = 0;
|
|
|
|
uint16_t bootKey = 0x7777;
|
|
volatile uint16_t *const bootKeyPtr = (volatile uint16_t *)0x0800;
|
|
|
|
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 it times out or is instructed to exit.
|
|
*/
|
|
int main(void)
|
|
{
|
|
/* Save the value of the boot key memory before it is overwritten */
|
|
uint16_t bootKeyPtrVal = *bootKeyPtr;
|
|
*bootKeyPtr = 0;
|
|
|
|
/* Check the reason for the reset so we can act accordingly */
|
|
uint8_t mcusr_state = MCUSR; // store the initial state of the Status register
|
|
MCUSR = 0; // clear all reset flags
|
|
|
|
/* Watchdog may be configured with a 15 ms period so must disable it before going any further */
|
|
wdt_disable();
|
|
|
|
if (mcusr_state & (1<<EXTRF)) {
|
|
// External reset - we should continue to self-programming mode.
|
|
} else if (mcusr_state == (1<<PORF) && pgm_read_word(0) != 0xFFFF) {
|
|
// After a power-on reset skip the bootloader and jump straight to sketch
|
|
// if one exists.
|
|
StartSketch();
|
|
} else if ((mcusr_state == (1<<WDRF)) && (bootKeyPtrVal != bootKey) && (pgm_read_word(0) != 0xFFFF)) {
|
|
// If it looks like an "accidental" watchdog reset then start the sketch.
|
|
StartSketch();
|
|
}
|
|
|
|
/* Setup hardware required for the bootloader */
|
|
SetupHardware();
|
|
|
|
/* Enable global interrupts so that the USB stack can function */
|
|
sei();
|
|
|
|
Timeout = 0;
|
|
|
|
while (RunBootloader)
|
|
{
|
|
CDC_Task();
|
|
USB_USBTask();
|
|
/* Time out and start the sketch if one is present */
|
|
if (Timeout > TIMEOUT_PERIOD)
|
|
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')
|
|
{
|
|
/* We nearly run out the bootloader timeout clock,
|
|
* leaving just a few hundred milliseconds so the
|
|
* bootloder has time to respond and service any
|
|
* subsequent requests */
|
|
Timeout = TIMEOUT_PERIOD - 500;
|
|
|
|
/* Re-enable RWW section - must be done here in case
|
|
* user has disabled verification on upload. */
|
|
boot_rww_enable_safe();
|
|
|
|
// 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'))
|
|
{
|
|
// Keep resetting the timeout counter if we're receiving self-programming instructions
|
|
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();
|
|
}
|
|
|