36 lines
1.1 KiB
C
36 lines
1.1 KiB
C
// this code from:
|
|
// http://www.pjrc.com/teensy/jump_to_bootloader.html
|
|
#include <avr/io.h>
|
|
#include <avr/interrupt.h>
|
|
#include <util/delay.h>
|
|
|
|
void jump_bootloader(void) {
|
|
cli();
|
|
// disable watchdog, if enabled
|
|
// disable all peripherals
|
|
UDCON = 1;
|
|
USBCON = (1<<FRZCLK); // disable USB
|
|
UCSR1B = 0;
|
|
_delay_ms(5);
|
|
#if defined(__AVR_AT90USB162__) // Teensy 1.0
|
|
DDRB = 0; DDRC = 0; DDRD = 0;
|
|
TIMSK0 = 0; TIMSK1 = 0;
|
|
asm volatile("jmp 0x1F00");
|
|
#elif defined(__AVR_ATmega32U4__) // Teensy 2.0
|
|
DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0;
|
|
TIMSK0 = 0; TIMSK1 = 0; TIMSK3 = 0; TIMSK4 = 0;
|
|
ADCSRA = 0;
|
|
asm volatile("jmp 0x3F00");
|
|
#elif defined(__AVR_AT90USB646__) // Teensy++ 1.0
|
|
DDRA = 0; DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0;
|
|
TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0; TIMSK3 = 0;
|
|
ADCSRA = 0;
|
|
asm volatile("jmp 0x7E00");
|
|
#elif defined(__AVR_AT90USB1286__) // Teensy++ 2.0
|
|
DDRA = 0; DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0;
|
|
TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0; TIMSK3 = 0;
|
|
ADCSRA = 0;
|
|
asm volatile("jmp 0xFE00");
|
|
#endif
|
|
}
|