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-rw-r--r--common/bootloader.c68
1 files changed, 51 insertions, 17 deletions
diff --git a/common/bootloader.c b/common/bootloader.c
index 5cbfc72e5b..cb971c7043 100644
--- a/common/bootloader.c
+++ b/common/bootloader.c
@@ -1,22 +1,56 @@
-/*
-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.
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include <util/delay.h>
+#include "bootloader.h"
-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.
+/* Start Bootloader from Application
+ * See
+ * http://www.pjrc.com/teensy/jump_to_bootloader.html
+ * http://www.fourwalledcubicle.com/files/LUFA/Doc/120219/html/_page__software_bootloader_start.html
+ */
-You should have received a copy of the GNU General Public License
-along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
+/* Boot Section Size in bytes
+ * Teensy halfKay 512
+ * Atmel DFU loader 4096
+ * LUFA bootloader 4096
+ */
+#ifndef BOOT_SIZE
+#define BOOT_SIZE 512
+#endif
-#include "bootloader.h"
+#define FLASH_SIZE (FLASHEND + 1)
+#define BOOTLOADER_START (FLASHEND - BOOT_SIZE)
+void bootloader_jump(void) {
+ cli();
+ // disable watchdog, if enabled
+ // disable all peripherals
+ UDCON = 1;
+ USBCON = (1<<FRZCLK); // disable USB
+ UCSR1B = 0;
+ _delay_ms(5);
+#if defined(__AVR_AT90USB162__)
+ EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0;
+ TIMSK0 = 0; TIMSK1 = 0; UCSR1B = 0;
+ DDRB = 0; DDRC = 0; DDRD = 0;
+ PORTB = 0; PORTC = 0; PORTD = 0;
+#elif defined(__AVR_ATmega32U4__)
+ EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
+ TIMSK0 = 0; TIMSK1 = 0; TIMSK3 = 0; TIMSK4 = 0; UCSR1B = 0; TWCR = 0;
+ DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0; TWCR = 0;
+ PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
+#elif defined(__AVR_AT90USB646__)
+ EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
+ TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0; TIMSK3 = 0; UCSR1B = 0; TWCR = 0;
+ DDRA = 0; DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0;
+ PORTA = 0; PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
+#elif defined(__AVR_AT90USB1286__)
+ EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
+ TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0; TIMSK3 = 0; UCSR1B = 0; TWCR = 0;
+ DDRA = 0; DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0;
+ PORTA = 0; PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
+#endif
-void bootloader_jump(void) __attribute__ ((weak));
-void bootloader_jump(void) {}
+ // start Bootloader
+ ((void (*)(void))BOOTLOADER_START)();
+}