2 #include <avr/interrupt.h>
3 #include <util/delay.h>
4 #include "bootloader.h"
6 /* Start Bootloader from Application
8 * http://www.pjrc.com/teensy/jump_to_bootloader.html
9 * http://www.fourwalledcubicle.com/files/LUFA/Doc/120219/html/_page__software_bootloader_start.html
12 // TODO: support usbasp
13 /* Boot Section Size in bytes
15 * Atmel DFU loader 4096
16 * LUFA bootloader 4096
22 #define FLASH_SIZE (FLASHEND + 1)
23 #define BOOTLOADER_START (FLASHEND - BOOT_SIZE)
25 void bootloader_jump(void) {
31 #if defined(__AVR_AT90USB162__) || defined(__AVR_ATmega32U4__) || defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB1286__)
32 // disable watchdog, if enabled
33 // disable all peripherals
35 USBCON = (1<<FRZCLK); // disable USB
39 // This makes custom USBasploader come up.
43 #if defined(__AVR_AT90USB162__)
44 EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0;
45 TIMSK0 = 0; TIMSK1 = 0; UCSR1B = 0;
46 DDRB = 0; DDRC = 0; DDRD = 0;
47 PORTB = 0; PORTC = 0; PORTD = 0;
48 #elif defined(__AVR_ATmega32U4__)
49 EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
50 TIMSK0 = 0; TIMSK1 = 0; TIMSK3 = 0; TIMSK4 = 0; UCSR1B = 0; TWCR = 0;
51 DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0; TWCR = 0;
52 PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
53 #elif defined(__AVR_AT90USB646__)
54 EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
55 TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0; TIMSK3 = 0; UCSR1B = 0; TWCR = 0;
56 DDRA = 0; DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0;
57 PORTA = 0; PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
58 #elif defined(__AVR_AT90USB1286__)
59 EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
60 TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0; TIMSK3 = 0; UCSR1B = 0; TWCR = 0;
61 DDRA = 0; DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0;
62 PORTA = 0; PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
69 #if defined(__AVR_ATmega168__) || defined(__AVR_ATmega168P__) || defined(__AVR_ATmega328P)
70 // This makes custom USBasploader come up.
74 PORTB = 0; PORTC= 0; PORTD = 0;
75 DDRB = 0; DDRC= 0; DDRD = 0;
78 EIMSK = 0; EECR = 0; SPCR = 0;
79 ACSR = 0; SPMCSR = 0; WDTCSR = 0; PCICR = 0;
80 TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0;
81 ADCSRA = 0; TWCR = 0; UCSR0B = 0;
86 ((void (*)(void))BOOTLOADER_START)();