47 lines
1.5 KiB
C
47 lines
1.5 KiB
C
/*
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Copyright 2011 Jun Wako <wakojun@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#include "bootloader.h"
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void bootloader_jump(void) {
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cli();
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// This makes custom USBasploader come up.
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MCUSR = 0;
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// ATmega168PA
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// initialize ports
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PORTB = 0; PORTC= 0; PORTD = 0;
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DDRB = 0; DDRC= 0; DDRD = 0;
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// disable interrupts
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EIMSK = 0; EECR = 0; SPCR = 0;
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ACSR = 0; SPMCSR = 0; WDTCSR = 0; PCICR = 0;
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TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0;
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ADCSRA = 0; TWCR = 0; UCSR0B = 0;
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// Boot Loader Section Start Address:
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// BOOTSZ Size Address
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// (lock bit) (word) (word) (byte)
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// '11' 128 0x1F80 0x3F00
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// '10' 256 0x1F00 0x3E00
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// '01' 512 0x1E00 0x3C00
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// '00' 1024 0x1C00 0x3800
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asm volatile("jmp 0x3800");
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}
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