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@@ -1,22 +1,56 @@
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-/*
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-Copyright 2011 Jun Wako <wakojun@gmail.com>
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-
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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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+#include <avr/io.h>
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+#include <avr/interrupt.h>
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+#include <util/delay.h>
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+#include "bootloader.h"
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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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+/* Start Bootloader from Application
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+ * See
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+ * http://www.pjrc.com/teensy/jump_to_bootloader.html
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+ * http://www.fourwalledcubicle.com/files/LUFA/Doc/120219/html/_page__software_bootloader_start.html
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+ */
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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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+/* Boot Section Size in bytes
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+ * Teensy halfKay 512
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+ * Atmel DFU loader 4096
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+ * LUFA bootloader 4096
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+ */
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+#ifndef BOOT_SIZE
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+#define BOOT_SIZE 512
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+#endif
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-#include "bootloader.h"
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+#define FLASH_SIZE (FLASHEND + 1)
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+#define BOOTLOADER_START (FLASHEND - BOOT_SIZE)
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+void bootloader_jump(void) {
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+ cli();
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+ // disable watchdog, if enabled
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+ // disable all peripherals
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+ UDCON = 1;
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+ USBCON = (1<<FRZCLK); // disable USB
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+ UCSR1B = 0;
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+ _delay_ms(5);
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+#if defined(__AVR_AT90USB162__)
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+ EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0;
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+ TIMSK0 = 0; TIMSK1 = 0; UCSR1B = 0;
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+ DDRB = 0; DDRC = 0; DDRD = 0;
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+ PORTB = 0; PORTC = 0; PORTD = 0;
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+#elif defined(__AVR_ATmega32U4__)
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+ EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
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+ TIMSK0 = 0; TIMSK1 = 0; TIMSK3 = 0; TIMSK4 = 0; UCSR1B = 0; TWCR = 0;
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+ DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0; TWCR = 0;
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+ PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
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+#elif defined(__AVR_AT90USB646__)
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+ EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
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+ TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0; TIMSK3 = 0; UCSR1B = 0; TWCR = 0;
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+ DDRA = 0; DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0;
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+ PORTA = 0; PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
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+#elif defined(__AVR_AT90USB1286__)
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+ EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
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+ TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0; TIMSK3 = 0; UCSR1B = 0; TWCR = 0;
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+ DDRA = 0; DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0;
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+ PORTA = 0; PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
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+#endif
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-void bootloader_jump(void) __attribute__ ((weak));
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-void bootloader_jump(void) {}
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+ // start Bootloader
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+ ((void (*)(void))BOOTLOADER_START)();
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+}
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