diff options
Diffstat (limited to 'common/bootloader.c')
| -rw-r--r-- | common/bootloader.c | 97 |
1 files changed, 81 insertions, 16 deletions
diff --git a/common/bootloader.c b/common/bootloader.c index 5cbfc72e5b..612b949648 100644 --- a/common/bootloader.c +++ b/common/bootloader.c @@ -1,22 +1,87 @@ -/* -Copyright 2011 Jun Wako <wakojun@gmail.com> +#include <avr/io.h> +#include <avr/interrupt.h> +#include <util/delay.h> +#include "bootloader.h" -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 2 of the License, or -(at your option) any later version. +/* Start Bootloader from Application + * See + * http://www.pjrc.com/teensy/jump_to_bootloader.html + * http://www.fourwalledcubicle.com/files/LUFA/Doc/120219/html/_page__software_bootloader_start.html + */ -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. +// TODO: support usbasp +/* Boot Section Size in bytes + * Teensy halfKay 512 + * Atmel DFU loader 4096 + * LUFA bootloader 4096 + */ +#ifndef BOOT_SIZE +#define BOOT_SIZE 512 +#endif -You should have received a copy of the GNU General Public License -along with this program. If not, see <http://www.gnu.org/licenses/>. -*/ +#define FLASH_SIZE (FLASHEND + 1) +#define BOOTLOADER_START (FLASHEND - BOOT_SIZE) -#include "bootloader.h" +void bootloader_jump(void) { + cli(); + + // + //Teensy + // +#if defined(__AVR_AT90USB162__) || defined(__AVR_ATmega32U4__) || defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB1286__) + // disable watchdog, if enabled + // disable all peripherals + UDCON = 1; + USBCON = (1<<FRZCLK); // disable USB + UCSR1B = 0; + _delay_ms(5); +#else + // This makes custom USBasploader come up. + MCUSR = 0; +#endif + +#if defined(__AVR_AT90USB162__) + 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; +#elif defined(__AVR_ATmega32U4__) + 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; +#elif defined(__AVR_AT90USB646__) + 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; +#elif defined(__AVR_AT90USB1286__) + 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; +#endif + + + // + //USBasp + // +#if defined(__AVR_ATmega168__) || defined(__AVR_ATmega168P__) || defined(__AVR_ATmega328P) + // This makes custom USBasploader come up. + MCUSR = 0; + + // initialize ports + PORTB = 0; PORTC= 0; PORTD = 0; + DDRB = 0; DDRC= 0; DDRD = 0; + + // disable interrupts + EIMSK = 0; EECR = 0; SPCR = 0; + ACSR = 0; SPMCSR = 0; WDTCSR = 0; PCICR = 0; + TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0; + ADCSRA = 0; TWCR = 0; UCSR0B = 0; +#endif -void bootloader_jump(void) __attribute__ ((weak)); -void bootloader_jump(void) {} + // start Bootloader + ((void (*)(void))BOOTLOADER_START)(); +} |