You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
577 lines
17 KiB
577 lines
17 KiB
/*
|
|
LUFA Library
|
|
Copyright (C) Dean Camera, 2010.
|
|
|
|
dean [at] fourwalledcubicle [dot] com
|
|
www.fourwalledcubicle.com
|
|
*/
|
|
|
|
/*
|
|
Copyright 2010 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_BOOTLOADERCDC_C
|
|
#include "BootloaderCDC.h"
|
|
|
|
/** Line coding options for the virtual serial port. Although the virtual serial port data is never
|
|
* sent through a physical serial port, the line encoding data must still be read and preserved from
|
|
* the host, or the host will detect a problem and fail to open the port. This structure contains the
|
|
* current encoding options, including baud rate, character format, parity mode and total number of
|
|
* bits in each data chunk.
|
|
*/
|
|
CDC_Line_Coding_t LineCoding = { .BaudRateBPS = 9600,
|
|
.CharFormat = OneStopBit,
|
|
.ParityType = 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.)
|
|
*/
|
|
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.
|
|
*/
|
|
bool RunBootloader = true;
|
|
|
|
|
|
/** 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)
|
|
{
|
|
/* Setup hardware required for the bootloader */
|
|
SetupHardware();
|
|
|
|
/* Enable global interrupts so that the USB stack can function */
|
|
sei();
|
|
|
|
while (RunBootloader)
|
|
{
|
|
CDC_Task();
|
|
USB_USBTask();
|
|
}
|
|
|
|
/* Disconnect from the host - USB interface will be reset later along with the AVR */
|
|
USB_Detach();
|
|
|
|
/* Enable the watchdog and force a timeout to reset the AVR */
|
|
wdt_enable(WDTO_250MS);
|
|
|
|
for (;;);
|
|
}
|
|
|
|
/** 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);
|
|
|
|
/* Initialize USB Subsystem */
|
|
USB_Init();
|
|
}
|
|
|
|
/** 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_UnhandledControlRequest event. This is used to catch standard and class specific
|
|
* control requests that are not handled internally by the USB library, so that they can be handled appropriately
|
|
* for the application.
|
|
*/
|
|
void EVENT_USB_Device_UnhandledControlRequest(void)
|
|
{
|
|
uint8_t* LineCodingData = (uint8_t*)&LineCoding;
|
|
|
|
/* Process CDC specific control requests */
|
|
switch (USB_ControlRequest.bRequest)
|
|
{
|
|
case REQ_GetLineEncoding:
|
|
if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
|
|
{
|
|
Endpoint_ClearSETUP();
|
|
|
|
for (uint8_t i = 0; i < sizeof(LineCoding); i++)
|
|
Endpoint_Write_Byte(*(LineCodingData++));
|
|
|
|
Endpoint_ClearIN();
|
|
|
|
Endpoint_ClearStatusStage();
|
|
}
|
|
|
|
break;
|
|
case REQ_SetLineEncoding:
|
|
if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
|
|
{
|
|
Endpoint_ClearSETUP();
|
|
|
|
while (!(Endpoint_IsOUTReceived()))
|
|
{
|
|
if (USB_DeviceState == DEVICE_STATE_Unattached)
|
|
return;
|
|
}
|
|
|
|
for (uint8_t i = 0; i < sizeof(LineCoding); i++)
|
|
*(LineCodingData++) = Endpoint_Read_Byte();
|
|
|
|
Endpoint_ClearOUT();
|
|
|
|
Endpoint_ClearStatusStage();
|
|
}
|
|
|
|
break;
|
|
case REQ_SetControlLineState:
|
|
if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
|
|
{
|
|
Endpoint_ClearSETUP();
|
|
|
|
Endpoint_ClearStatusStage();
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
/** 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;
|
|
}
|
|
|
|
/* 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*)(uint16_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;
|
|
|
|
HighByte = false;
|
|
}
|
|
else
|
|
{
|
|
LowByte = FetchNextCommandByte();
|
|
|
|
HighByte = true;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Write the next EEPROM byte from the endpoint */
|
|
eeprom_write_byte((uint8_t*)(uint16_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');
|
|
}
|
|
}
|
|
|
|
/** 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_Byte();
|
|
}
|
|
|
|
/** 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 OUT endpoint */
|
|
Endpoint_Write_Byte(Response);
|
|
}
|
|
|
|
/** 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())
|
|
{
|
|
/* Read in the bootloader command (first byte sent from host) */
|
|
uint8_t Command = FetchNextCommandByte();
|
|
|
|
if ((Command == 'L') || (Command == 'P') || (Command == 'T') || (Command == 'E'))
|
|
{
|
|
if (Command == 'E')
|
|
RunBootloader = false;
|
|
if (Command == 'T')
|
|
FetchNextCommandByte();
|
|
|
|
/* 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 == 'b')
|
|
{
|
|
WriteNextResponseByte('Y');
|
|
|
|
/* Send block size to the host */
|
|
WriteNextResponseByte(SPM_PAGESIZE >> 8);
|
|
WriteNextResponseByte(SPM_PAGESIZE & 0xFF);
|
|
}
|
|
else if (Command == 'e')
|
|
{
|
|
/* Clear the application section of flash */
|
|
for (uint32_t CurrFlashAddress = 0; CurrFlashAddress < BOOT_START_ADDR; CurrFlashAddress++)
|
|
{
|
|
boot_page_erase(CurrFlashAddress);
|
|
boot_spm_busy_wait();
|
|
boot_page_write(CurrFlashAddress);
|
|
boot_spm_busy_wait();
|
|
|
|
CurrFlashAddress += SPM_PAGESIZE;
|
|
}
|
|
|
|
/* Send confirmation byte back to the host */
|
|
WriteNextResponseByte('\r');
|
|
}
|
|
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');
|
|
}
|
|
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));
|
|
}
|
|
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 | 1, 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 == 'B') || (Command == 'g'))
|
|
{
|
|
/* Delegate the block write/read to a separate function for clarity */
|
|
ReadWriteMemoryBlock(Command);
|
|
}
|
|
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);
|
|
}
|
|
else if (Command == 'D')
|
|
{
|
|
/* Read the byte from the endpoint and write it to the EEPROM */
|
|
eeprom_write_byte((uint8_t*)((uint16_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*)((uint16_t)(CurrAddress >> 1))));
|
|
|
|
/* Increment the address after use */
|
|
CurrAddress += 2;
|
|
}
|
|
else if (Command == 27)
|
|
{
|
|
/* Escape is sync, ignore */
|
|
}
|
|
else
|
|
{
|
|
/* Unknown 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();
|
|
}
|
|
}
|