X-Git-Url: https://git.friedersdorff.com/?a=blobdiff_plain;f=common%2Fbootloader.c;h=6e04efbbda4e2ff91a8855571382f8fc4563ef2c;hb=81141ad0eba1a9db9abd0f7903d8077c28e76b40;hp=5cbfc72e5b9bce076ca5ed91523247934a6eb3aa;hpb=62d1ebb91c7b381ce3d88aad9ee0b03bea9fce26;p=max%2Ftmk_keyboard.git

diff --git a/common/bootloader.c b/common/bootloader.c
index 5cbfc72e..6e04efbb 100644
--- a/common/bootloader.c
+++ b/common/bootloader.c
@@ -1,22 +1,87 @@
-/*
-Copyright 2011 Jun Wako <wakojun@gmail.com>
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include <util/delay.h>
+#include "bootloader.h"
 
-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.
+/* 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
+ */
 
-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.
+// TODO: support usbasp
+/* Boot Section Size in bytes
+ * Teensy halfKay   512
+ * Atmel DFU loader 4096
+ * LUFA bootloader  4096
+ */
+#ifndef BOOT_SIZE
+#define BOOT_SIZE 512
+#endif
 
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*/
+#define FLASH_SIZE          (FLASHEND + 1)
+#define BOOTLOADER_START    (FLASHEND - BOOT_SIZE)
 
-#include "bootloader.h"
+void bootloader_jump(void) {
+    cli();
+
+    //
+    //Teensy
+    //
+#if defined(__AVR_AT90USB162__) || defined(__AVR_ATmega32U4__) || defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB1286__)
+    // disable watchdog, if enabled
+    // disable all peripherals
+    UDCON = 1;
+    USBCON = (1<<FRZCLK);  // disable USB
+    UCSR1B = 0;
+    _delay_ms(5);
+#else
+    // This makes custom USBasploader come up.
+    MCUSR = 0;
+#endif
+
+#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
+
+
+    //
+    //USBasp
+    //
+#if defined(__AVR_ATmega168__) || defined(__AVR_ATmega168P__) || defined(__AVR_ATmega328P__)
+    // This makes custom USBasploader come up.
+    MCUSR = 0;
+
+    // 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;
+#endif
 
 
-void bootloader_jump(void) __attribute__ ((weak));
-void bootloader_jump(void) {}
+    // start Bootloader
+    ((void (*)(void))BOOTLOADER_START)();
+}