48 rivejä
1.5 KiB
C
48 rivejä
1.5 KiB
C
/*
|
|
Copyright 2011 Jun Wako <wakojun@gmail.com>
|
|
|
|
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.
|
|
|
|
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 <avr/io.h>
|
|
#include <avr/interrupt.h>
|
|
#include "bootloader.h"
|
|
|
|
|
|
void bootloader_jump(void) {
|
|
cli();
|
|
// This makes custom USBasploader come up.
|
|
MCUSR = 0;
|
|
|
|
// ATmega168PA
|
|
// 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;
|
|
|
|
// Boot Loader Section Start Address:
|
|
// BOOTSZ Size Address
|
|
// (lock bit) (word) (word) (byte)
|
|
// '11' 128 0x1F80 0x3F00
|
|
// '10' 256 0x1F00 0x3E00
|
|
// '01' 512 0x1E00 0x3C00
|
|
// '00' 1024 0x1C00 0x3800
|
|
asm volatile("jmp 0x3800");
|
|
}
|