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- #include <avr/io.h>
- #include <avr/interrupt.h>
- #include <util/delay.h>
- #include "bootloader.h"
-
- /* 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
- */
-
- // 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
-
- #define FLASH_SIZE (FLASHEND + 1)
- #define BOOTLOADER_START (FLASHEND - BOOT_SIZE)
-
- 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
-
-
- // start Bootloader
- ((void (*)(void))BOOTLOADER_START)();
- }
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