diff options
Diffstat (limited to 'platforms/avr/bootloaders/halfkay.c')
| -rw-r--r-- | platforms/avr/bootloaders/halfkay.c | 128 | 
1 files changed, 128 insertions, 0 deletions
| diff --git a/platforms/avr/bootloaders/halfkay.c b/platforms/avr/bootloaders/halfkay.c new file mode 100644 index 0000000000..6ce2e19114 --- /dev/null +++ b/platforms/avr/bootloaders/halfkay.c @@ -0,0 +1,128 @@ +/* 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 +} | 
