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Add support of USBasp bootloader.

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This commit is contained in:
tmk 2012-06-30 14:44:14 +09:00
parent 2c5d3ac76f
commit 6d79e6579f
3 changed files with 37 additions and 52 deletions
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30
common/bootloader.c
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@ -24,12 +24,22 @@
void bootloader_jump(void) {
cli();
//
//Teensy
//
#if defined(__AVR_AT90USB162__) || defined(__AVR_ATmega32U4__) || defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB1286__)
// disable watchdog, if enabled
// disable all peripherals
UDCON = 1;
USBCON = (1<<FRZCLK); // disable USB
UCSR1B = 0;
_delay_ms(5);
#else
// This makes custom USBasploader come up.
MCUSR = 0;
#endif
#if defined(__AVR_AT90USB162__)
EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0;
TIMSK0 = 0; TIMSK1 = 0; UCSR1B = 0;
@ -52,6 +62,26 @@ void bootloader_jump(void) {
PORTA = 0; PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
#endif
//
//USBasp
//
#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
// start Bootloader
((void (*)(void))BOOTLOADER_START)();
}