128 lines
2.7 KiB
C
128 lines
2.7 KiB
C
/* Copyright 2021 QMK
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "bootloader.h"
|
|
|
|
#include <avr/interrupt.h>
|
|
#include <util/delay.h>
|
|
|
|
__attribute__((weak)) void bootloader_jump(void) {
|
|
// http://www.pjrc.com/teensy/jump_to_bootloader.html
|
|
|
|
cli();
|
|
// disable watchdog, if enabled (it's not)
|
|
// disable all peripherals
|
|
// a shutdown call might make sense here
|
|
UDCON = 1;
|
|
USBCON = (1 << FRZCLK); // disable USB
|
|
UCSR1B = 0;
|
|
_delay_ms(5);
|
|
|
|
#if defined(__AVR_AT90USB162__) // Teensy 1.0
|
|
EIMSK = 0;
|
|
PCICR = 0;
|
|
SPCR = 0;
|
|
ACSR = 0;
|
|
EECR = 0;
|
|
TIMSK0 = 0;
|
|
TIMSK1 = 0;
|
|
UCSR1B = 0;
|
|
DDRB = 0;
|
|
DDRC = 0;
|
|
DDRD = 0;
|
|
PORTB = 0;
|
|
PORTC = 0;
|
|
PORTD = 0;
|
|
asm volatile("jmp 0x3E00");
|
|
#elif defined(__AVR_ATmega32U4__) // Teensy 2.0
|
|
EIMSK = 0;
|
|
PCICR = 0;
|
|
SPCR = 0;
|
|
ACSR = 0;
|
|
EECR = 0;
|
|
ADCSRA = 0;
|
|
TIMSK0 = 0;
|
|
TIMSK1 = 0;
|
|
TIMSK3 = 0;
|
|
TIMSK4 = 0;
|
|
UCSR1B = 0;
|
|
TWCR = 0;
|
|
DDRB = 0;
|
|
DDRC = 0;
|
|
DDRD = 0;
|
|
DDRE = 0;
|
|
DDRF = 0;
|
|
TWCR = 0;
|
|
PORTB = 0;
|
|
PORTC = 0;
|
|
PORTD = 0;
|
|
PORTE = 0;
|
|
PORTF = 0;
|
|
asm volatile("jmp 0x7E00");
|
|
#elif defined(__AVR_AT90USB646__) // Teensy++ 1.0
|
|
EIMSK = 0;
|
|
PCICR = 0;
|
|
SPCR = 0;
|
|
ACSR = 0;
|
|
EECR = 0;
|
|
ADCSRA = 0;
|
|
TIMSK0 = 0;
|
|
TIMSK1 = 0;
|
|
TIMSK2 = 0;
|
|
TIMSK3 = 0;
|
|
UCSR1B = 0;
|
|
TWCR = 0;
|
|
DDRA = 0;
|
|
DDRB = 0;
|
|
DDRC = 0;
|
|
DDRD = 0;
|
|
DDRE = 0;
|
|
DDRF = 0;
|
|
PORTA = 0;
|
|
PORTB = 0;
|
|
PORTC = 0;
|
|
PORTD = 0;
|
|
PORTE = 0;
|
|
PORTF = 0;
|
|
asm volatile("jmp 0xFC00");
|
|
#elif defined(__AVR_AT90USB1286__) // Teensy++ 2.0
|
|
EIMSK = 0;
|
|
PCICR = 0;
|
|
SPCR = 0;
|
|
ACSR = 0;
|
|
EECR = 0;
|
|
ADCSRA = 0;
|
|
TIMSK0 = 0;
|
|
TIMSK1 = 0;
|
|
TIMSK2 = 0;
|
|
TIMSK3 = 0;
|
|
UCSR1B = 0;
|
|
TWCR = 0;
|
|
DDRA = 0;
|
|
DDRB = 0;
|
|
DDRC = 0;
|
|
DDRD = 0;
|
|
DDRE = 0;
|
|
DDRF = 0;
|
|
PORTA = 0;
|
|
PORTB = 0;
|
|
PORTC = 0;
|
|
PORTD = 0;
|
|
PORTE = 0;
|
|
PORTF = 0;
|
|
asm volatile("jmp 0x1FC00");
|
|
#endif
|
|
}
|