diff options
Diffstat (limited to 'jump_bootloader.c')
| -rw-r--r-- | jump_bootloader.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/jump_bootloader.c b/jump_bootloader.c new file mode 100644 index 000000000..f60c3596a --- /dev/null +++ b/jump_bootloader.c @@ -0,0 +1,35 @@ +// 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() { + 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 +} |