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git.gir.st - tmk_keyboard.git/blob - common/bootloader.c
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
)();