/*
LUFA Library
- Copyright (C) Dean Camera, 2013.
+ Copyright (C) Dean Camera, 2021.
dean [at] fourwalledcubicle [dot] com
www.lufa-lib.org
*/
/*
- Copyright 2013 Dean Camera (dean [at] fourwalledcubicle [dot] com)
+ Copyright 2021 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
{
bool JumpToApplication = false;
- #if ((BOARD == BOARD_XPLAIN) || (BOARD == BOARD_XPLAIN_REV1))
+ #if (BOARD == BOARD_LEONARDO)
+ /* Enable pull-up on the IO13 pin so we can use it to select the mode */
+ PORTC |= (1 << 7);
+ Delay_MS(10);
+
+ /* If IO13 is not jumpered to ground, start the user application instead */
+ JumpToApplication = ((PINC & (1 << 7)) != 0);
+
+ /* Disable pull-up after the check has completed */
+ PORTC &= ~(1 << 7);
+ #elif ((BOARD == BOARD_XPLAIN) || (BOARD == BOARD_XPLAIN_REV1))
/* Disable JTAG debugging */
JTAG_DISABLE();
Delay_MS(10);
/* If the TCK pin is not jumpered to ground, start the user application instead */
- JumpToApplication |= ((PINF & (1 << 4)) != 0);
+ JumpToApplication = ((PINF & (1 << 4)) != 0);
/* Re-enable JTAG debugging */
JTAG_ENABLE();
+ #else
+ /* Check if the device's BOOTRST fuse is set */
+ if (!(BootloaderAPI_ReadFuse(GET_HIGH_FUSE_BITS) & ~FUSE_BOOTRST))
+ {
+ /* If the reset source was not an external reset or the key is correct, clear it and jump to the application */
+ if (!(MCUSR & (1 << EXTRF)) || (MagicBootKey == MAGIC_BOOT_KEY))
+ JumpToApplication = true;
+
+ /* Clear reset source */
+ MCUSR &= ~(1 << EXTRF);
+ }
+ else
+ {
+ /* If the reset source was the bootloader and the key is correct, clear it and jump to the application;
+ * this can happen in the HWBE fuse is set, and the HBE pin is low during the watchdog reset */
+ if ((MCUSR & (1 << WDRF)) && (MagicBootKey == MAGIC_BOOT_KEY))
+ JumpToApplication = true;
+
+ /* Clear reset source */
+ MCUSR &= ~(1 << WDRF);
+ }
#endif
- /* If the reset source was the bootloader and the key is correct, clear it and jump to the application */
- if ((MCUSR & (1 << WDRF)) && (MagicBootKey == MAGIC_BOOT_KEY))
- JumpToApplication |= true;
+ /* Don't run the user application if the reset vector is blank (no app loaded) */
+ bool ApplicationValid = (pgm_read_word_near(0) != 0xFFFF);
/* If a request has been made to jump to the user application, honor it */
- if (JumpToApplication)
+ if (JumpToApplication && ApplicationValid)
{
/* Turn off the watchdog */
- MCUSR &= ~(1<<WDRF);
+ MCUSR &= ~(1 << WDRF);
wdt_disable();
/* Clear the boot key and jump to the user application */
while (RunBootloader || WaitForExit)
USB_USBTask();
+ /* Wait a short time to end all USB transactions and then disconnect */
+ _delay_us(1000);
+
/* Reset configured hardware back to their original states for the user application */
ResetHardware();
}
/* Write the next word into the current flash page */
- boot_page_fill(CurrFlashAddress.Long, Endpoint_Read_16_LE());
+ BootloaderAPI_FillWord(CurrFlashAddress.Long, Endpoint_Read_16_LE());
/* Adjust counters */
WordsInFlashPage += 1;
if ((WordsInFlashPage == (SPM_PAGESIZE >> 1)) || !(WordsRemaining))
{
/* Commit the flash page to memory */
- boot_page_write(CurrFlashPageStartAddress);
- boot_spm_busy_wait();
+ BootloaderAPI_WritePage(CurrFlashPageStartAddress);
/* Check if programming incomplete */
if (WordsRemaining)
WordsInFlashPage = 0;
/* Erase next page's temp buffer */
- boot_page_erase(CurrFlashAddress.Long);
- boot_spm_busy_wait();
+ BootloaderAPI_ErasePage(CurrFlashAddress.Long);
}
}
}
/* Once programming complete, start address equals the end address */
StartAddr = EndAddr;
-
- /* Re-enable the RWW section of flash */
- boot_rww_enable();
}
else // Write EEPROM
{
}
/* Read the byte from the USB interface and write to to the EEPROM */
- eeprom_write_byte((uint8_t*)StartAddr, Endpoint_Read_8());
+ eeprom_update_byte((uint8_t*)StartAddr, Endpoint_Read_8());
/* Adjust counters */
StartAddr++;
} CurrFlashAddress = {.Words = {StartAddr, Flash64KBPage}};
/* Erase the current page's temp buffer */
- boot_page_erase(CurrFlashAddress.Long);
- boot_spm_busy_wait();
+ BootloaderAPI_ErasePage(CurrFlashAddress.Long);
}
/* Set the state so that the next DNLOAD requests reads in the firmware */
}
else // Start via jump
{
- /* Set the flag to terminate the bootloader at next opportunity */
- RunBootloader = false;
+ /* Set the flag to terminate the bootloader at next opportunity if a valid application has been loaded */
+ if (pgm_read_word_near(0) == 0xFFFF)
+ RunBootloader = false;
}
}
}
else if (IS_TWOBYTE_COMMAND(SentCommand.Data, 0x00, 0xFF)) // Erase flash
{
- uint32_t CurrFlashAddress = 0;
-
/* Clear the application section of flash */
- while (CurrFlashAddress < (uint32_t)BOOT_START_ADDR)
- {
- boot_page_erase(CurrFlashAddress);
- boot_spm_busy_wait();
- boot_page_write(CurrFlashAddress);
- boot_spm_busy_wait();
-
- CurrFlashAddress += SPM_PAGESIZE;
- }
-
- /* Re-enable the RWW section of flash as writing to the flash locks it out */
- boot_rww_enable();
+ for (uint32_t CurrFlashAddress = 0; CurrFlashAddress < (uint32_t)BOOT_START_ADDR; CurrFlashAddress += SPM_PAGESIZE)
+ BootloaderAPI_ErasePage(CurrFlashAddress);
/* Memory has been erased, reset the security bit so that programming/reading is allowed */
IsSecure = false;
const uint8_t BootloaderInfo[3] = {BOOTLOADER_VERSION, BOOTLOADER_ID_BYTE1, BOOTLOADER_ID_BYTE2};
const uint8_t SignatureInfo[4] = {0x58, AVR_SIGNATURE_1, AVR_SIGNATURE_2, AVR_SIGNATURE_3};
- uint8_t DataIndexToRead = SentCommand.Data[1];
+ uint8_t DataIndexToRead = SentCommand.Data[1];
+ bool ReadAddressInvalid = false;
if (IS_ONEBYTE_COMMAND(SentCommand.Data, 0x00)) // Read bootloader info
{
- ResponseByte = BootloaderInfo[DataIndexToRead];
+ if (DataIndexToRead < 3)
+ ResponseByte = BootloaderInfo[DataIndexToRead];
+ else
+ ReadAddressInvalid = true;
}
else if (IS_ONEBYTE_COMMAND(SentCommand.Data, 0x01)) // Read signature byte
{
- if (DataIndexToRead < 0x60)
- ResponseByte = SignatureInfo[DataIndexToRead - 0x30];
- else
- ResponseByte = SignatureInfo[DataIndexToRead - 0x60 + 3];
+ switch (DataIndexToRead)
+ {
+ case 0x30:
+ ResponseByte = SignatureInfo[0];
+ break;
+ case 0x31:
+ ResponseByte = SignatureInfo[1];
+ break;
+ case 0x60:
+ ResponseByte = SignatureInfo[2];
+ break;
+ case 0x61:
+ ResponseByte = SignatureInfo[3];
+ break;
+ default:
+ ReadAddressInvalid = true;
+ break;
+ }
}
-}
+ if (ReadAddressInvalid)
+ {
+ /* Set the state and status variables to indicate the error */
+ DFU_State = dfuERROR;
+ DFU_Status = errADDRESS;
+ }
+}
projects / pub / lufa.git / blobdiff