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- /* 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
- }
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