diff options
Diffstat (limited to 'tmk_core/common/avr')
| -rw-r--r-- | tmk_core/common/avr/bootloader.c | 77 |
1 files changed, 43 insertions, 34 deletions
diff --git a/tmk_core/common/avr/bootloader.c b/tmk_core/common/avr/bootloader.c index 3cdcd2e426..29036f7c5a 100644 --- a/tmk_core/common/avr/bootloader.c +++ b/tmk_core/common/avr/bootloader.c @@ -65,6 +65,13 @@ #define BOOT_SIZE_1024 0b010 #define BOOT_SIZE_2048 0b000 +//compatibility between ATMega8 and ATMega88 +#if !defined (MCUCSR) + #if defined (MCUSR) + #define MCUCSR MCUSR + #endif +#endif + /** \brief Entering the Bootloader via Software * * http://www.fourwalledcubicle.com/files/LUFA/Doc/120730/html/_page__software_bootloader_start.html @@ -149,6 +156,39 @@ void bootloader_jump(void) { while(1) {} // wait for watchdog timer to trigger + #elif defined(BOOTLOADER_USBASP) + // Taken with permission of Stephan Baerwolf from https://github.com/tinyusbboard/API/blob/master/apipage.c + wdt_enable(WDTO_15MS); + wdt_reset(); + asm volatile ( + "cli \n\t" + "ldi r29 , %[ramendhi] \n\t" + "ldi r28 , %[ramendlo] \n\t" + #if (FLASHEND>131071) + "ldi r18 , %[bootaddrhi] \n\t" + "st Y+, r18 \n\t" + #endif + "ldi r18 , %[bootaddrme] \n\t" + "st Y+, r18 \n\t" + "ldi r18 , %[bootaddrlo] \n\t" + "st Y+, r18 \n\t" + "out %[mcucsrio], __zero_reg__ \n\t" + "bootloader_startup_loop%=: \n\t" + "rjmp bootloader_startup_loop%= \n\t" + : + : [mcucsrio] "I" (_SFR_IO_ADDR(MCUCSR)), + #if (FLASHEND>131071) + [ramendhi] "M" (((RAMEND - 2) >> 8) & 0xff), + [ramendlo] "M" (((RAMEND - 2) >> 0) & 0xff), + [bootaddrhi] "M" ((((FLASH_SIZE - BOOTLOADER_SIZE) >> 1) >>16) & 0xff), + #else + [ramendhi] "M" (((RAMEND - 1) >> 8) & 0xff), + [ramendlo] "M" (((RAMEND - 1) >> 0) & 0xff), + #endif + [bootaddrme] "M" ((((FLASH_SIZE - BOOTLOADER_SIZE) >> 1) >> 8) & 0xff), + [bootaddrlo] "M" ((((FLASH_SIZE - BOOTLOADER_SIZE) >> 1) >> 0) & 0xff) + ); + #else // Assume remaining boards are DFU, even if the flag isn't set #if !(defined(__AVR_ATmega32A__) || defined(__AVR_ATmega328P__)) // no USB - maybe BOOTLOADER_BOOTLOADHID instead though? @@ -172,24 +212,19 @@ void bootloader_jump(void) { } -#ifdef __AVR_ATmega32A__ - // MCUSR is actually called MCUCSR in ATmega32A - #define MCUSR MCUCSR -#endif - /* this runs before main() */ void bootloader_jump_after_watchdog_reset(void) __attribute__ ((used, naked, section (".init3"))); void bootloader_jump_after_watchdog_reset(void) { #ifndef BOOTLOADER_HALFKAY - if ((MCUSR & (1<<WDRF)) && reset_key == BOOTLOADER_RESET_KEY) { + if ((MCUCSR & (1<<WDRF)) && reset_key == BOOTLOADER_RESET_KEY) { reset_key = 0; // My custom USBasploader requires this to come up. - MCUSR = 0; + MCUCSR = 0; // Seems like Teensy halfkay loader requires clearing WDRF and disabling watchdog. - MCUSR &= ~(1<<WDRF); + MCUCSR &= ~(1<<WDRF); wdt_disable(); @@ -202,29 +237,3 @@ void bootloader_jump_after_watchdog_reset(void) } #endif } - - -#if 0 - /* - * USBaspLoader - I'm not sure if this is used at all in any projects - * would love to support it if it is -Jack - */ -#if defined(__AVR_ATmega168__) || defined(__AVR_ATmega168P__) || defined(__AVR_ATmega328P__) - // This makes custom USBasploader come up. - MCUSR = 0; - - // initialize ports - PORTB = 0; PORTC= 0; PORTD = 0; - DDRB = 0; DDRC= 0; DDRD = 0; - - // disable interrupts - EIMSK = 0; EECR = 0; SPCR = 0; - ACSR = 0; SPMCSR = 0; WDTCSR = 0; PCICR = 0; - TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0; - ADCSRA = 0; TWCR = 0; UCSR0B = 0; -#endif - - // This is compled into 'icall', address should be in word unit, not byte. - ((void (*)(void))(BOOTLOADER_START/2))(); -} -#endif |