diff options
Diffstat (limited to 'tmk_core/common/avr/bootloader.c')
| -rw-r--r-- | tmk_core/common/avr/bootloader.c | 62 |
1 files changed, 41 insertions, 21 deletions
diff --git a/tmk_core/common/avr/bootloader.c b/tmk_core/common/avr/bootloader.c index 7c744e8c79..ad547b9853 100644 --- a/tmk_core/common/avr/bootloader.c +++ b/tmk_core/common/avr/bootloader.c @@ -38,7 +38,7 @@ * | | | | * = = = = * | | 32KB-4KB | | 128KB-8KB - * 0x6000 +---------------+ 0x1FC00 +---------------+ + * 0x7000 +---------------+ 0x1E000 +---------------+ * | Bootloader | 4KB | Bootloader | 8KB * 0x7FFF +---------------+ 0x1FFFF +---------------+ * @@ -64,8 +64,8 @@ #define BOOTLOADER_START (FLASH_SIZE - BOOTLOADER_SIZE) -/* - * Entering the Bootloader via Software +/* + * Entering the Bootloader via Software * http://www.fourwalledcubicle.com/files/LUFA/Doc/120730/html/_page__software_bootloader_start.html */ #define BOOTLOADER_RESET_KEY 0xB007B007 @@ -73,26 +73,46 @@ uint32_t reset_key __attribute__ ((section (".noinit"))); /* initialize MCU status by watchdog reset */ void bootloader_jump(void) { -#ifdef PROTOCOL_LUFA - USB_Disable(); - cli(); - _delay_ms(2000); -#endif + #ifndef CATERINA_BOOTLOADER -#ifdef PROTOCOL_PJRC - cli(); - UDCON = 1; - USBCON = (1<<FRZCLK); - UCSR1B = 0; - _delay_ms(5); -#endif + #ifdef PROTOCOL_LUFA + USB_Disable(); + cli(); + _delay_ms(2000); + #endif - // watchdog reset - reset_key = BOOTLOADER_RESET_KEY; - wdt_enable(WDTO_250MS); - for (;;); -} + #ifdef PROTOCOL_PJRC + cli(); + UDCON = 1; + USBCON = (1<<FRZCLK); + UCSR1B = 0; + _delay_ms(5); + #endif + + // watchdog reset + reset_key = BOOTLOADER_RESET_KEY; + wdt_enable(WDTO_250MS); + for (;;); + + #else + // this block may be optional + // TODO: figure it out + + uint16_t *const bootKeyPtr = (uint16_t *)0x0800; + + // Value used by Caterina bootloader use to determine whether to run the + // sketch or the bootloader programmer. + uint16_t bootKey = 0x7777; + *bootKeyPtr = bootKey; + + // setup watchdog timeout + wdt_enable(WDTO_60MS); + + while(1) {} // wait for watchdog timer to trigger + + #endif +} /* this runs before main() */ void bootloader_jump_after_watchdog_reset(void) __attribute__ ((used, naked, section (".init3"))); @@ -117,7 +137,7 @@ void bootloader_jump_after_watchdog_reset(void) #if 0 /* Jumping To The Bootloader * http://www.pjrc.com/teensy/jump_to_bootloader.html - * + * * This method doen't work when using LUFA. idk why. * - needs to initialize more regisers or interrupt setting? */ |