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+/**********************************************************/
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+/* Serial Bootloader for Atmel megaAVR Controllers */
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+/* */
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+/* tested with ATmega8, ATmega128 and ATmega168 */
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+/* should work with other mega's, see code for details */
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+/* */
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+/* ATmegaBOOT.c */
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+/* */
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+/* */
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+/* 20090308: integrated Mega changes into main bootloader */
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+/* source by D. Mellis */
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+/* 20080930: hacked for Arduino Mega (with the 1280 */
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+/* processor, backwards compatible) */
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+/* by D. Cuartielles */
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+/* 20070626: hacked for Arduino Diecimila (which auto- */
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+/* resets when a USB connection is made to it) */
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+/* by D. Mellis */
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+/* 20060802: hacked for Arduino by D. Cuartielles */
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+/* based on a previous hack by D. Mellis */
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+/* and D. Cuartielles */
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+/* */
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+/* Monitor and debug functions were added to the original */
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+/* code by Dr. Erik Lins, chip45.com. (See below) */
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+/* */
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+/* Thanks to Karl Pitrich for fixing a bootloader pin */
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+/* problem and more informative LED blinking! */
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+/* */
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+/* For the latest version see: */
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+/* http://www.chip45.com/ */
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+/* */
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+/* ------------------------------------------------------ */
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+/* */
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+/* based on stk500boot.c */
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+/* Copyright (c) 2003, Jason P. Kyle */
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+/* All rights reserved. */
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+/* see avr1.org for original file and information */
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+/* */
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+/* This program is free software; you can redistribute it */
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+/* and/or modify it under the terms of the GNU General */
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+/* Public License as published by the Free Software */
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+/* Foundation; either version 2 of the License, or */
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+/* (at your option) any later version. */
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+/* */
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+/* This program is distributed in the hope that it will */
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+/* be useful, but WITHOUT ANY WARRANTY; without even the */
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+/* implied warranty of MERCHANTABILITY or FITNESS FOR A */
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+/* PARTICULAR PURPOSE. See the GNU General Public */
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+/* License for more details. */
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+/* */
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+/* You should have received a copy of the GNU General */
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+/* Public License along with this program; if not, write */
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+/* to the Free Software Foundation, Inc., */
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+/* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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+/* */
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+/* Licence can be viewed at */
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+/* http://www.fsf.org/licenses/gpl.txt */
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+/* */
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+/* Target = Atmel AVR m128,m64,m32,m16,m8,m162,m163,m169, */
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+/* m8515,m8535. ATmega161 has a very small boot block so */
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+/* isn't supported. */
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+/* */
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+/* Tested with m168 */
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+/**********************************************************/
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+
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+/* $Id$ */
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+
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+
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+/* some includes */
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+#include <inttypes.h>
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+#include <avr/io.h>
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+#include <avr/pgmspace.h>
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+#include <avr/interrupt.h>
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+#include <avr/wdt.h>
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+#include <util/delay.h>
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+
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+/* the current avr-libc eeprom functions do not support the ATmega168 */
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+/* own eeprom write/read functions are used instead */
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+#if !defined(__AVR_ATmega168__) || !defined(__AVR_ATmega328P__)
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+#include <avr/eeprom.h>
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+#endif
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+
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+/* Use the F_CPU defined in Makefile */
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+
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+/* 20060803: hacked by DojoCorp */
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+/* 20070626: hacked by David A. Mellis to decrease waiting time for auto-reset */
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+/* set the waiting time for the bootloader */
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+/* get this from the Makefile instead */
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+/* #define MAX_TIME_COUNT (F_CPU>>4) */
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+
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+/* 20070707: hacked by David A. Mellis - after this many errors give up and launch application */
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+#define MAX_ERROR_COUNT 5
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+
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+/* set the UART baud rate */
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+/* 20060803: hacked by DojoCorp */
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+//#define BAUD_RATE 115200
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+#ifndef BAUD_RATE
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+#define BAUD_RATE 19200
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+#endif
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+
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+
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+/* SW_MAJOR and MINOR needs to be updated from time to time to avoid warning message from AVR Studio */
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+/* never allow AVR Studio to do an update !!!! */
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+#define HW_VER 0x02
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+#define SW_MAJOR 0x01
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+#define SW_MINOR 0x10
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+
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+
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+/* Adjust to suit whatever pin your hardware uses to enter the bootloader */
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+/* ATmega128 has two UARTS so two pins are used to enter bootloader and select UART */
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+/* ATmega1280 has four UARTS, but for Arduino Mega, we will only use RXD0 to get code */
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+/* BL0... means UART0, BL1... means UART1 */
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+#ifdef __AVR_ATmega128__
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+#define BL_DDR DDRF
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+#define BL_PORT PORTF
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+#define BL_PIN PINF
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+#define BL0 PINF7
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+#define BL1 PINF6
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+#elif defined __AVR_ATmega1280__
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+/* we just don't do anything for the MEGA and enter bootloader on reset anyway*/
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+#elif defined __AVR_ATmega1284P_ || defined __AVR_ATmega644P__
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+
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+#else
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+/* other ATmegas have only one UART, so only one pin is defined to enter bootloader */
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+#define BL_DDR DDRD
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+#define BL_PORT PORTD
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+#define BL_PIN PIND
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+#define BL PIND6
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+#endif
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+
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+
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+/* onboard LED is used to indicate, that the bootloader was entered (3x flashing) */
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+/* if monitor functions are included, LED goes on after monitor was entered */
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+#if defined __AVR_ATmega128__ || defined __AVR_ATmega1280__
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+/* Onboard LED is connected to pin PB7 (e.g. Crumb128, PROBOmega128, Savvy128, Arduino Mega) */
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+#define LED_DDR DDRB
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+#define LED_PORT PORTB
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+#define LED_PIN PINB
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+#define LED PINB7
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+#elif defined __AVR_ATmega1284P__ || defined __AVR_ATmega644P__
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+#define LED_DDR DDRB
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+#define LED_PORT PORTB
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+#define LED_PIN PINB
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+#define LED PINB0
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+#else
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+/* Onboard LED is connected to pin PB5 in Arduino NG, Diecimila, and Duomilanuove */
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+/* other boards like e.g. Crumb8, Crumb168 are using PB2 */
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+#define LED_DDR DDRB
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+#define LED_PORT PORTB
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+#define LED_PIN PINB
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+#define LED PINB5
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+#endif
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+
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+
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+/* monitor functions will only be compiled when using ATmega128, due to bootblock size constraints */
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+#if defined(__AVR_ATmega128__) || defined(__AVR_ATmega1280__)
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+#define MONITOR 1
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+#endif
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+
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+
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+/* define various device id's */
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+/* manufacturer byte is always the same */
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+#define SIG1 0x1E // Yep, Atmel is the only manufacturer of AVR micros. Single source :(
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+
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+#if defined __AVR_ATmega1280__
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+#define SIG2 0x97
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+#define SIG3 0x03
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+#define PAGE_SIZE 0x80U //128 words
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+
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+#elif defined __AVR_ATmega1284P__
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+#define SIG2 0x97
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+#define SIG3 0x05
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+#define PAGE_SIZE 0x080U //128 words
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+
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+#elif defined __AVR_ATmega1281__
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+#define SIG2 0x97
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+#define SIG3 0x04
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+#define PAGE_SIZE 0x80U //128 words
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+
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+#elif defined __AVR_ATmega644P__
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+#define SIG2 0x96
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+#define SIG3 0x0A
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+#define PAGE_SIZE 0x080U //128 words
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+
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+#elif defined __AVR_ATmega128__
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+#define SIG2 0x97
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+#define SIG3 0x02
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+#define PAGE_SIZE 0x80U //128 words
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+
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+#elif defined __AVR_ATmega64__
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+#define SIG2 0x96
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+#define SIG3 0x02
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+#define PAGE_SIZE 0x80U //128 words
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+
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+#elif defined __AVR_ATmega32__
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+#define SIG2 0x95
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+#define SIG3 0x02
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+#define PAGE_SIZE 0x40U //64 words
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+
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+#elif defined __AVR_ATmega16__
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+#define SIG2 0x94
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+#define SIG3 0x03
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+#define PAGE_SIZE 0x40U //64 words
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+
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+#elif defined __AVR_ATmega8__
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+#define SIG2 0x93
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+#define SIG3 0x07
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+#define PAGE_SIZE 0x20U //32 words
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+
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+#elif defined __AVR_ATmega88__
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+#define SIG2 0x93
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+#define SIG3 0x0a
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+#define PAGE_SIZE 0x20U //32 words
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+
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+#elif defined __AVR_ATmega168__
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+#define SIG2 0x94
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+#define SIG3 0x06
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+#define PAGE_SIZE 0x40U //64 words
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+
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+#elif defined __AVR_ATmega328P__
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+#define SIG2 0x95
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+#define SIG3 0x0F
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+#define PAGE_SIZE 0x40U //64 words
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+
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+#elif defined __AVR_ATmega162__
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+#define SIG2 0x94
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+#define SIG3 0x04
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+#define PAGE_SIZE 0x40U //64 words
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+
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+#elif defined __AVR_ATmega163__
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+#define SIG2 0x94
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+#define SIG3 0x02
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+#define PAGE_SIZE 0x40U //64 words
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+
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+#elif defined __AVR_ATmega169__
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+#define SIG2 0x94
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+#define SIG3 0x05
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+#define PAGE_SIZE 0x40U //64 words
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+
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+#elif defined __AVR_ATmega8515__
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+#define SIG2 0x93
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+#define SIG3 0x06
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+#define PAGE_SIZE 0x20U //32 words
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+
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+#elif defined __AVR_ATmega8535__
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+#define SIG2 0x93
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+#define SIG3 0x08
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+#define PAGE_SIZE 0x20U //32 words
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+#endif
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+
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+
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+/* function prototypes */
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+void putch(char);
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+char getch(void);
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+void getNch(uint8_t);
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+void byte_response(uint8_t);
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+void nothing_response(void);
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+char gethex(void);
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+void puthex(char);
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+void flash_led(uint8_t);
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+
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+/* some variables */
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+union address_union {
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+ uint16_t word;
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+ uint8_t byte[2];
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+} address;
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+
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+union length_union {
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+ uint16_t word;
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+ uint8_t byte[2];
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+} length;
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+
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+struct flags_struct {
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+ unsigned eeprom : 1;
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+ unsigned rampz : 1;
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+} flags;
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+
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+uint8_t buff[256];
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+uint8_t address_high;
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+
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+uint8_t pagesz=0x80;
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+
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+uint8_t i;
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+uint8_t bootuart = 0;
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+
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+uint8_t error_count = 0;
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+
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+void (*app_start)(void) = 0x0000;
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+
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+
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+/* main program starts here */
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+int main(void)
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+{
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+ uint8_t ch,ch2;
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+ uint16_t w;
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+
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+#ifdef WATCHDOG_MODS
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+ ch = MCUSR;
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+ MCUSR = 0;
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+
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+ WDTCSR |= _BV(WDCE) | _BV(WDE);
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+ WDTCSR = 0;
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+
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+ // Check if the WDT was used to reset, in which case we dont bootload and skip straight to the code. woot.
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+ if (! (ch & _BV(EXTRF))) // if it's a not an external reset...
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+ app_start(); // skip bootloader
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+#else
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+ asm volatile("nop\n\t");
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+#endif
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+
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+ /* set pin direction for bootloader pin and enable pullup */
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+ /* for ATmega128, two pins need to be initialized */
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+#ifdef __AVR_ATmega128__
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+ BL_DDR &= ~_BV(BL0);
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+ BL_DDR &= ~_BV(BL1);
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+ BL_PORT |= _BV(BL0);
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+ BL_PORT |= _BV(BL1);
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+#else
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+ /* We run the bootloader regardless of the state of this pin. Thus, don't
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+ put it in a different state than the other pins. --DAM, 070709
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+ This also applies to Arduino Mega -- DC, 080930
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+ BL_DDR &= ~_BV(BL);
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+ BL_PORT |= _BV(BL);
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+ */
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+#endif
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+
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+
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+#ifdef __AVR_ATmega128__
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+ /* check which UART should be used for booting */
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+ if(bit_is_clear(BL_PIN, BL0)) {
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+ bootuart = 1;
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+ }
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+ else if(bit_is_clear(BL_PIN, BL1)) {
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+ bootuart = 2;
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+ }
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+#endif
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+
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+#if defined __AVR_ATmega1280__ || defined __AVR_ATmega1284P__ || defined __AVR_ATmega644P__
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+ /* the mega1280 chip has four serial ports ... we could eventually use any of them, or not? */
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+ /* however, we don't wanna confuse people, to avoid making a mess, we will stick to RXD0, TXD0 */
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+ bootuart = 1;
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+#endif
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+
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+ /* check if flash is programmed already, if not start bootloader anyway */
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+ if(pgm_read_byte_near(0x0000) != 0xFF) {
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+
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+#ifdef __AVR_ATmega128__
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+ /* no UART was selected, start application */
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+ if(!bootuart) {
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+ app_start();
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+ }
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+#else
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+ /* check if bootloader pin is set low */
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+ /* we don't start this part neither for the m8, nor m168 */
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+ //if(bit_is_set(BL_PIN, BL)) {
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+ // app_start();
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+ // }
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+#endif
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+ }
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+
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+#ifdef __AVR_ATmega128__
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+ /* no bootuart was selected, default to uart 0 */
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+ if(!bootuart) {
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+ bootuart = 1;
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+ }
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+#endif
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+
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+
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+ /* initialize UART(s) depending on CPU defined */
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+#if defined(__AVR_ATmega128__) || defined(__AVR_ATmega1280__) || defined(__AVR_ATmega1284P__) || defined(__AVR_ATmega644P__)
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+ if(bootuart == 1) {
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+ UBRR0L = (uint8_t)(F_CPU/(BAUD_RATE*16L)-1);
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+ UBRR0H = (F_CPU/(BAUD_RATE*16L)-1) >> 8;
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+ UCSR0A = 0x00;
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+ UCSR0C = 0x06;
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+ UCSR0B = _BV(TXEN0)|_BV(RXEN0);
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+ }
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+ if(bootuart == 2) {
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+ UBRR1L = (uint8_t)(F_CPU/(BAUD_RATE*16L)-1);
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+ UBRR1H = (F_CPU/(BAUD_RATE*16L)-1) >> 8;
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+ UCSR1A = 0x00;
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+ UCSR1C = 0x06;
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+ UCSR1B = _BV(TXEN1)|_BV(RXEN1);
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+ }
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+#elif defined __AVR_ATmega163__
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+ UBRR = (uint8_t)(F_CPU/(BAUD_RATE*16L)-1);
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+ UBRRHI = (F_CPU/(BAUD_RATE*16L)-1) >> 8;
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+ UCSRA = 0x00;
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+ UCSRB = _BV(TXEN)|_BV(RXEN);
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+#elif defined(__AVR_ATmega168__) || defined(__AVR_ATmega328P__)
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+
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+#ifdef DOUBLE_SPEED
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+ UCSR0A = (1<<U2X0); //Double speed mode USART0
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+ UBRR0L = (uint8_t)(F_CPU/(BAUD_RATE*8L)-1);
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+ UBRR0H = (F_CPU/(BAUD_RATE*8L)-1) >> 8;
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+#else
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+ UBRR0L = (uint8_t)(F_CPU/(BAUD_RATE*16L)-1);
|
|
|
+ UBRR0H = (F_CPU/(BAUD_RATE*16L)-1) >> 8;
|
|
|
+#endif
|
|
|
+
|
|
|
+ UCSR0B = (1<<RXEN0) | (1<<TXEN0);
|
|
|
+ UCSR0C = (1<<UCSZ00) | (1<<UCSZ01);
|
|
|
+
|
|
|
+ /* Enable internal pull-up resistor on pin D0 (RX), in order
|
|
|
+ to supress line noise that prevents the bootloader from
|
|
|
+ timing out (DAM: 20070509) */
|
|
|
+ DDRD &= ~_BV(PIND0);
|
|
|
+ PORTD |= _BV(PIND0);
|
|
|
+#elif defined __AVR_ATmega8__
|
|
|
+ /* m8 */
|
|
|
+ UBRRH = (((F_CPU/BAUD_RATE)/16)-1)>>8; // set baud rate
|
|
|
+ UBRRL = (((F_CPU/BAUD_RATE)/16)-1);
|
|
|
+ UCSRB = (1<<RXEN)|(1<<TXEN); // enable Rx & Tx
|
|
|
+ UCSRC = (1<<URSEL)|(1<<UCSZ1)|(1<<UCSZ0); // config USART; 8N1
|
|
|
+#else
|
|
|
+ /* m16,m32,m169,m8515,m8535 */
|
|
|
+ UBRRL = (uint8_t)(F_CPU/(BAUD_RATE*16L)-1);
|
|
|
+ UBRRH = (F_CPU/(BAUD_RATE*16L)-1) >> 8;
|
|
|
+ UCSRA = 0x00;
|
|
|
+ UCSRC = 0x06;
|
|
|
+ UCSRB = _BV(TXEN)|_BV(RXEN);
|
|
|
+#endif
|
|
|
+
|
|
|
+#if defined __AVR_ATmega1280__
|
|
|
+ /* Enable internal pull-up resistor on pin D0 (RX), in order
|
|
|
+ to supress line noise that prevents the bootloader from
|
|
|
+ timing out (DAM: 20070509) */
|
|
|
+ /* feature added to the Arduino Mega --DC: 080930 */
|
|
|
+ DDRE &= ~_BV(PINE0);
|
|
|
+ PORTE |= _BV(PINE0);
|
|
|
+#endif
|
|
|
+
|
|
|
+
|
|
|
+ /* set LED pin as output */
|
|
|
+ LED_DDR |= _BV(LED);
|
|
|
+
|
|
|
+
|
|
|
+ /* flash onboard LED to signal entering of bootloader */
|
|
|
+#if defined(__AVR_ATmega128__) || defined(__AVR_ATmega1280__) || defined(__AVR_ATmega1284P__) || defined(__AVR_ATmega644P__)
|
|
|
+ // 4x for UART0, 5x for UART1
|
|
|
+ flash_led(NUM_LED_FLASHES + bootuart);
|
|
|
+#else
|
|
|
+ flash_led(NUM_LED_FLASHES);
|
|
|
+#endif
|
|
|
+
|
|
|
+ /* 20050803: by DojoCorp, this is one of the parts provoking the
|
|
|
+ system to stop listening, cancelled from the original */
|
|
|
+ //putch('\0');
|
|
|
+
|
|
|
+ /* forever loop */
|
|
|
+ for (;;) {
|
|
|
+
|
|
|
+ /* get character from UART */
|
|
|
+ ch = getch();
|
|
|
+
|
|
|
+ /* A bunch of if...else if... gives smaller code than switch...case ! */
|
|
|
+
|
|
|
+ /* Hello is anyone home ? */
|
|
|
+ if(ch=='0') {
|
|
|
+ nothing_response();
|
|
|
+ }
|
|
|
+
|
|
|
+
|
|
|
+ /* Request programmer ID */
|
|
|
+ /* Not using PROGMEM string due to boot block in m128 being beyond 64kB boundry */
|
|
|
+ /* Would need to selectively manipulate RAMPZ, and it's only 9 characters anyway so who cares. */
|
|
|
+ else if(ch=='1') {
|
|
|
+ if (getch() == ' ') {
|
|
|
+ putch(0x14);
|
|
|
+ putch('A');
|
|
|
+ putch('V');
|
|
|
+ putch('R');
|
|
|
+ putch(' ');
|
|
|
+ putch('I');
|
|
|
+ putch('S');
|
|
|
+ putch('P');
|
|
|
+ putch(0x10);
|
|
|
+ } else {
|
|
|
+ if (++error_count == MAX_ERROR_COUNT)
|
|
|
+ app_start();
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+
|
|
|
+ /* AVR ISP/STK500 board commands DON'T CARE so default nothing_response */
|
|
|
+ else if(ch=='@') {
|
|
|
+ ch2 = getch();
|
|
|
+ if (ch2>0x85) getch();
|
|
|
+ nothing_response();
|
|
|
+ }
|
|
|
+
|
|
|
+
|
|
|
+ /* AVR ISP/STK500 board requests */
|
|
|
+ else if(ch=='A') {
|
|
|
+ ch2 = getch();
|
|
|
+ if(ch2==0x80) byte_response(HW_VER); // Hardware version
|
|
|
+ else if(ch2==0x81) byte_response(SW_MAJOR); // Software major version
|
|
|
+ else if(ch2==0x82) byte_response(SW_MINOR); // Software minor version
|
|
|
+ else if(ch2==0x98) byte_response(0x03); // Unknown but seems to be required by avr studio 3.56
|
|
|
+ else byte_response(0x00); // Covers various unnecessary responses we don't care about
|
|
|
+ }
|
|
|
+
|
|
|
+
|
|
|
+ /* Device Parameters DON'T CARE, DEVICE IS FIXED */
|
|
|
+ else if(ch=='B') {
|
|
|
+ getNch(20);
|
|
|
+ nothing_response();
|
|
|
+ }
|
|
|
+
|
|
|
+
|
|
|
+ /* Parallel programming stuff DON'T CARE */
|
|
|
+ else if(ch=='E') {
|
|
|
+ getNch(5);
|
|
|
+ nothing_response();
|
|
|
+ }
|
|
|
+
|
|
|
+
|
|
|
+ /* P: Enter programming mode */
|
|
|
+ /* R: Erase device, don't care as we will erase one page at a time anyway. */
|
|
|
+ else if(ch=='P' || ch=='R') {
|
|
|
+ nothing_response();
|
|
|
+ }
|
|
|
+
|
|
|
+
|
|
|
+ /* Leave programming mode */
|
|
|
+ else if(ch=='Q') {
|
|
|
+ nothing_response();
|
|
|
+#ifdef WATCHDOG_MODS
|
|
|
+ // autoreset via watchdog (sneaky!)
|
|
|
+ WDTCSR = _BV(WDE);
|
|
|
+ while (1); // 16 ms
|
|
|
+#endif
|
|
|
+ }
|
|
|
+
|
|
|
+
|
|
|
+ /* Set address, little endian. EEPROM in bytes, FLASH in words */
|
|
|
+ /* Perhaps extra address bytes may be added in future to support > 128kB FLASH. */
|
|
|
+ /* This might explain why little endian was used here, big endian used everywhere else. */
|
|
|
+ else if(ch=='U') {
|
|
|
+ address.byte[0] = getch();
|
|
|
+ address.byte[1] = getch();
|
|
|
+ nothing_response();
|
|
|
+ }
|
|
|
+
|
|
|
+
|
|
|
+ /* Universal SPI programming command, disabled. Would be used for fuses and lock bits. */
|
|
|
+ else if(ch=='V') {
|
|
|
+ if (getch() == 0x30) {
|
|
|
+ getch();
|
|
|
+ ch = getch();
|
|
|
+ getch();
|
|
|
+ if (ch == 0) {
|
|
|
+ byte_response(SIG1);
|
|
|
+ } else if (ch == 1) {
|
|
|
+ byte_response(SIG2);
|
|
|
+ } else {
|
|
|
+ byte_response(SIG3);
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ getNch(3);
|
|
|
+ byte_response(0x00);
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+
|
|
|
+ /* Write memory, length is big endian and is in bytes */
|
|
|
+ else if(ch=='d') {
|
|
|
+ length.byte[1] = getch();
|
|
|
+ length.byte[0] = getch();
|
|
|
+ flags.eeprom = 0;
|
|
|
+ if (getch() == 'E') flags.eeprom = 1;
|
|
|
+ for (w=0;w<length.word;w++) {
|
|
|
+ buff[w] = getch(); // Store data in buffer, can't keep up with serial data stream whilst programming pages
|
|
|
+ }
|
|
|
+ if (getch() == ' ') {
|
|
|
+ if (flags.eeprom) { //Write to EEPROM one byte at a time
|
|
|
+ address.word <<= 1;
|
|
|
+ for(w=0;w<length.word;w++) {
|
|
|
+#if defined(__AVR_ATmega168__) || defined(__AVR_ATmega328P__)
|
|
|
+ while(EECR & (1<<EEPE));
|
|
|
+ EEAR = (uint16_t)(void *)address.word;
|
|
|
+ EEDR = buff[w];
|
|
|
+ EECR |= (1<<EEMPE);
|
|
|
+ EECR |= (1<<EEPE);
|
|
|
+#else
|
|
|
+ eeprom_write_byte((void *)address.word,buff[w]);
|
|
|
+#endif
|
|
|
+ address.word++;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else { //Write to FLASH one page at a time
|
|
|
+ if (address.byte[1]>127) address_high = 0x01; //Only possible with m128, m256 will need 3rd address byte. FIXME
|
|
|
+ else address_high = 0x00;
|
|
|
+#if defined(__AVR_ATmega128__) || defined(__AVR_ATmega1280__) || defined(__AVR_ATmega1281__) || defined(__AVR_ATmega1284P__)
|
|
|
+ RAMPZ = address_high;
|
|
|
+#endif
|
|
|
+ address.word = address.word << 1; //address * 2 -> byte location
|
|
|
+ /* if ((length.byte[0] & 0x01) == 0x01) length.word++; //Even up an odd number of bytes */
|
|
|
+ if ((length.byte[0] & 0x01)) length.word++; //Even up an odd number of bytes
|
|
|
+ cli(); //Disable interrupts, just to be sure
|
|
|
+#if defined(__AVR_ATmega1280__) || defined(__AVR_ATmega1281__) || defined(__AVR_ATmega1284P__) || defined(__AVR_ATmega644P__)
|
|
|
+ while(bit_is_set(EECR,EEPE)); //Wait for previous EEPROM writes to complete
|
|
|
+#else
|
|
|
+ while(bit_is_set(EECR,EEWE)); //Wait for previous EEPROM writes to complete
|
|
|
+#endif
|
|
|
+ asm volatile(
|
|
|
+ "clr r17 \n\t" //page_word_count
|
|
|
+ "lds r30,address \n\t" //Address of FLASH location (in bytes)
|
|
|
+ "lds r31,address+1 \n\t"
|
|
|
+ "ldi r28,lo8(buff) \n\t" //Start of buffer array in RAM
|
|
|
+ "ldi r29,hi8(buff) \n\t"
|
|
|
+ "lds r24,length \n\t" //Length of data to be written (in bytes)
|
|
|
+ "lds r25,length+1 \n\t"
|
|
|
+ "length_loop: \n\t" //Main loop, repeat for number of words in block
|
|
|
+ "cpi r17,0x00 \n\t" //If page_word_count=0 then erase page
|
|
|
+ "brne no_page_erase \n\t"
|
|
|
+ "wait_spm1: \n\t"
|
|
|
+ "lds r16,%0 \n\t" //Wait for previous spm to complete
|
|
|
+ "andi r16,1 \n\t"
|
|
|
+ "cpi r16,1 \n\t"
|
|
|
+ "breq wait_spm1 \n\t"
|
|
|
+ "ldi r16,0x03 \n\t" //Erase page pointed to by Z
|
|
|
+ "sts %0,r16 \n\t"
|
|
|
+ "spm \n\t"
|
|
|
+#ifdef __AVR_ATmega163__
|
|
|
+ ".word 0xFFFF \n\t"
|
|
|
+ "nop \n\t"
|
|
|
+#endif
|
|
|
+ "wait_spm2: \n\t"
|
|
|
+ "lds r16,%0 \n\t" //Wait for previous spm to complete
|
|
|
+ "andi r16,1 \n\t"
|
|
|
+ "cpi r16,1 \n\t"
|
|
|
+ "breq wait_spm2 \n\t"
|
|
|
+
|
|
|
+ "ldi r16,0x11 \n\t" //Re-enable RWW section
|
|
|
+ "sts %0,r16 \n\t"
|
|
|
+ "spm \n\t"
|
|
|
+#ifdef __AVR_ATmega163__
|
|
|
+ ".word 0xFFFF \n\t"
|
|
|
+ "nop \n\t"
|
|
|
+#endif
|
|
|
+ "no_page_erase: \n\t"
|
|
|
+ "ld r0,Y+ \n\t" //Write 2 bytes into page buffer
|
|
|
+ "ld r1,Y+ \n\t"
|
|
|
+
|
|
|
+ "wait_spm3: \n\t"
|
|
|
+ "lds r16,%0 \n\t" //Wait for previous spm to complete
|
|
|
+ "andi r16,1 \n\t"
|
|
|
+ "cpi r16,1 \n\t"
|
|
|
+ "breq wait_spm3 \n\t"
|
|
|
+ "ldi r16,0x01 \n\t" //Load r0,r1 into FLASH page buffer
|
|
|
+ "sts %0,r16 \n\t"
|
|
|
+ "spm \n\t"
|
|
|
+
|
|
|
+ "inc r17 \n\t" //page_word_count++
|
|
|
+ "cpi r17,%1 \n\t"
|
|
|
+ "brlo same_page \n\t" //Still same page in FLASH
|
|
|
+ "write_page: \n\t"
|
|
|
+ "clr r17 \n\t" //New page, write current one first
|
|
|
+ "wait_spm4: \n\t"
|
|
|
+ "lds r16,%0 \n\t" //Wait for previous spm to complete
|
|
|
+ "andi r16,1 \n\t"
|
|
|
+ "cpi r16,1 \n\t"
|
|
|
+ "breq wait_spm4 \n\t"
|
|
|
+#ifdef __AVR_ATmega163__
|
|
|
+ "andi r30,0x80 \n\t" // m163 requires Z6:Z1 to be zero during page write
|
|
|
+#endif
|
|
|
+ "ldi r16,0x05 \n\t" //Write page pointed to by Z
|
|
|
+ "sts %0,r16 \n\t"
|
|
|
+ "spm \n\t"
|
|
|
+#ifdef __AVR_ATmega163__
|
|
|
+ ".word 0xFFFF \n\t"
|
|
|
+ "nop \n\t"
|
|
|
+ "ori r30,0x7E \n\t" // recover Z6:Z1 state after page write (had to be zero during write)
|
|
|
+#endif
|
|
|
+ "wait_spm5: \n\t"
|
|
|
+ "lds r16,%0 \n\t" //Wait for previous spm to complete
|
|
|
+ "andi r16,1 \n\t"
|
|
|
+ "cpi r16,1 \n\t"
|
|
|
+ "breq wait_spm5 \n\t"
|
|
|
+ "ldi r16,0x11 \n\t" //Re-enable RWW section
|
|
|
+ "sts %0,r16 \n\t"
|
|
|
+ "spm \n\t"
|
|
|
+#ifdef __AVR_ATmega163__
|
|
|
+ ".word 0xFFFF \n\t"
|
|
|
+ "nop \n\t"
|
|
|
+#endif
|
|
|
+ "same_page: \n\t"
|
|
|
+ "adiw r30,2 \n\t" //Next word in FLASH
|
|
|
+ "sbiw r24,2 \n\t" //length-2
|
|
|
+ "breq final_write \n\t" //Finished
|
|
|
+ "rjmp length_loop \n\t"
|
|
|
+ "final_write: \n\t"
|
|
|
+ "cpi r17,0 \n\t"
|
|
|
+ "breq block_done \n\t"
|
|
|
+ "adiw r24,2 \n\t" //length+2, fool above check on length after short page write
|
|
|
+ "rjmp write_page \n\t"
|
|
|
+ "block_done: \n\t"
|
|
|
+ "clr __zero_reg__ \n\t" //restore zero register
|
|
|
+#if defined __AVR_ATmega168__ || __AVR_ATmega328P__ || __AVR_ATmega128__ || __AVR_ATmega1280__ || __AVR_ATmega1281__ || __AVR_ATmega1284P__ || __AVR_ATmega644P__
|
|
|
+ : "=m" (SPMCSR) : "M" (PAGE_SIZE) : "r0","r16","r17","r24","r25","r28","r29","r30","r31"
|
|
|
+#else
|
|
|
+ : "=m" (SPMCR) : "M" (PAGE_SIZE) : "r0","r16","r17","r24","r25","r28","r29","r30","r31"
|
|
|
+#endif
|
|
|
+ );
|
|
|
+ /* Should really add a wait for RWW section to be enabled, don't actually need it since we never */
|
|
|
+ /* exit the bootloader without a power cycle anyhow */
|
|
|
+ }
|
|
|
+ putch(0x14);
|
|
|
+ putch(0x10);
|
|
|
+ } else {
|
|
|
+ if (++error_count == MAX_ERROR_COUNT)
|
|
|
+ app_start();
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+
|
|
|
+ /* Read memory block mode, length is big endian. */
|
|
|
+ else if(ch=='t') {
|
|
|
+ length.byte[1] = getch();
|
|
|
+ length.byte[0] = getch();
|
|
|
+#if defined(__AVR_ATmega128__) || defined(__AVR_ATmega1280__) || defined(__AVR_ATmega1284P__) || defined(__AVR_ATmega644P__)
|
|
|
+ if (address.word>0x7FFF) flags.rampz = 1; // No go with m256, FIXME
|
|
|
+ else flags.rampz = 0;
|
|
|
+#endif
|
|
|
+ address.word = address.word << 1; // address * 2 -> byte location
|
|
|
+ if (getch() == 'E') flags.eeprom = 1;
|
|
|
+ else flags.eeprom = 0;
|
|
|
+ if (getch() == ' ') { // Command terminator
|
|
|
+ putch(0x14);
|
|
|
+ for (w=0;w < length.word;w++) { // Can handle odd and even lengths okay
|
|
|
+ if (flags.eeprom) { // Byte access EEPROM read
|
|
|
+#if defined(__AVR_ATmega168__) || defined(__AVR_ATmega328P__)
|
|
|
+ while(EECR & (1<<EEPE));
|
|
|
+ EEAR = (uint16_t)(void *)address.word;
|
|
|
+ EECR |= (1<<EERE);
|
|
|
+ putch(EEDR);
|
|
|
+#else
|
|
|
+ putch(eeprom_read_byte((void *)address.word));
|
|
|
+#endif
|
|
|
+ address.word++;
|
|
|
+ }
|
|
|
+ else {
|
|
|
+
|
|
|
+ if (!flags.rampz) putch(pgm_read_byte_near(address.word));
|
|
|
+#if defined(__AVR_ATmega128__) || defined(__AVR_ATmega1280__) || defined(__AVR_ATmega1284P__)
|
|
|
+ else putch(pgm_read_byte_far(address.word + 0x10000));
|
|
|
+ // Hmmmm, yuck FIXME when m256 arrvies
|
|
|
+#endif
|
|
|
+ address.word++;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ putch(0x10);
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+
|
|
|
+ /* Get device signature bytes */
|
|
|
+ else if(ch=='u') {
|
|
|
+ if (getch() == ' ') {
|
|
|
+ putch(0x14);
|
|
|
+ putch(SIG1);
|
|
|
+ putch(SIG2);
|
|
|
+ putch(SIG3);
|
|
|
+ putch(0x10);
|
|
|
+ } else {
|
|
|
+ if (++error_count == MAX_ERROR_COUNT)
|
|
|
+ app_start();
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+
|
|
|
+ /* Read oscillator calibration byte */
|
|
|
+ else if(ch=='v') {
|
|
|
+ byte_response(0x00);
|
|
|
+ }
|
|
|
+
|
|
|
+
|
|
|
+#if defined MONITOR
|
|
|
+
|
|
|
+ /* here come the extended monitor commands by Erik Lins */
|
|
|
+
|
|
|
+ /* check for three times exclamation mark pressed */
|
|
|
+ else if(ch=='!') {
|
|
|
+ ch = getch();
|
|
|
+ if(ch=='!') {
|
|
|
+ ch = getch();
|
|
|
+ if(ch=='!') {
|
|
|
+ PGM_P welcome = "";
|
|
|
+#if defined(__AVR_ATmega128__) || defined(__AVR_ATmega1280__)
|
|
|
+ uint16_t extaddr;
|
|
|
+#endif
|
|
|
+ uint8_t addrl, addrh;
|
|
|
+
|
|
|
+#ifdef CRUMB128
|
|
|
+ welcome = "ATmegaBOOT / Crumb128 - (C) J.P.Kyle, E.Lins - 050815\n\r";
|
|
|
+#elif defined PROBOMEGA128
|
|
|
+ welcome = "ATmegaBOOT / PROBOmega128 - (C) J.P.Kyle, E.Lins - 050815\n\r";
|
|
|
+#elif defined SAVVY128
|
|
|
+ welcome = "ATmegaBOOT / Savvy128 - (C) J.P.Kyle, E.Lins - 050815\n\r";
|
|
|
+#elif defined __AVR_ATmega1280__
|
|
|
+ welcome = "ATmegaBOOT / Arduino Mega - (C) Arduino LLC - 090930\n\r";
|
|
|
+#endif
|
|
|
+
|
|
|
+ /* turn on LED */
|
|
|
+ LED_DDR |= _BV(LED);
|
|
|
+ LED_PORT &= ~_BV(LED);
|
|
|
+
|
|
|
+ /* print a welcome message and command overview */
|
|
|
+ for(i=0; welcome[i] != '\0'; ++i) {
|
|
|
+ putch(welcome[i]);
|
|
|
+ }
|
|
|
+
|
|
|
+ /* test for valid commands */
|
|
|
+ for(;;) {
|
|
|
+ putch('\n');
|
|
|
+ putch('\r');
|
|
|
+ putch(':');
|
|
|
+ putch(' ');
|
|
|
+
|
|
|
+ ch = getch();
|
|
|
+ putch(ch);
|
|
|
+
|
|
|
+ /* toggle LED */
|
|
|
+ if(ch == 't') {
|
|
|
+ if(bit_is_set(LED_PIN,LED)) {
|
|
|
+ LED_PORT &= ~_BV(LED);
|
|
|
+ putch('1');
|
|
|
+ } else {
|
|
|
+ LED_PORT |= _BV(LED);
|
|
|
+ putch('0');
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /* read byte from address */
|
|
|
+ else if(ch == 'r') {
|
|
|
+ ch = getch(); putch(ch);
|
|
|
+ addrh = gethex();
|
|
|
+ addrl = gethex();
|
|
|
+ putch('=');
|
|
|
+ ch = *(uint8_t *)((addrh << 8) + addrl);
|
|
|
+ puthex(ch);
|
|
|
+ }
|
|
|
+
|
|
|
+ /* write a byte to address */
|
|
|
+ else if(ch == 'w') {
|
|
|
+ ch = getch(); putch(ch);
|
|
|
+ addrh = gethex();
|
|
|
+ addrl = gethex();
|
|
|
+ ch = getch(); putch(ch);
|
|
|
+ ch = gethex();
|
|
|
+ *(uint8_t *)((addrh << 8) + addrl) = ch;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* read from uart and echo back */
|
|
|
+ else if(ch == 'u') {
|
|
|
+ for(;;) {
|
|
|
+ putch(getch());
|
|
|
+ }
|
|
|
+ }
|
|
|
+#if defined(__AVR_ATmega128__) || defined(__AVR_ATmega1280__)
|
|
|
+ /* external bus loop */
|
|
|
+ else if(ch == 'b') {
|
|
|
+ putch('b');
|
|
|
+ putch('u');
|
|
|
+ putch('s');
|
|
|
+ MCUCR = 0x80;
|
|
|
+ XMCRA = 0;
|
|
|
+ XMCRB = 0;
|
|
|
+ extaddr = 0x1100;
|
|
|
+ for(;;) {
|
|
|
+ ch = *(volatile uint8_t *)extaddr;
|
|
|
+ if(++extaddr == 0) {
|
|
|
+ extaddr = 0x1100;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+#endif
|
|
|
+
|
|
|
+ else if(ch == 'j') {
|
|
|
+ app_start();
|
|
|
+ }
|
|
|
+
|
|
|
+ } /* end of monitor functions */
|
|
|
+
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+ /* end of monitor */
|
|
|
+#endif
|
|
|
+ else if (++error_count == MAX_ERROR_COUNT) {
|
|
|
+ app_start();
|
|
|
+ }
|
|
|
+ } /* end of forever loop */
|
|
|
+
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+char gethexnib(void) {
|
|
|
+ char a;
|
|
|
+ a = getch(); putch(a);
|
|
|
+ if(a >= 'a') {
|
|
|
+ return (a - 'a' + 0x0a);
|
|
|
+ } else if(a >= '0') {
|
|
|
+ return(a - '0');
|
|
|
+ }
|
|
|
+ return a;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+char gethex(void) {
|
|
|
+ return (gethexnib() << 4) + gethexnib();
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+void puthex(char ch) {
|
|
|
+ char ah;
|
|
|
+
|
|
|
+ ah = ch >> 4;
|
|
|
+ if(ah >= 0x0a) {
|
|
|
+ ah = ah - 0x0a + 'a';
|
|
|
+ } else {
|
|
|
+ ah += '0';
|
|
|
+ }
|
|
|
+
|
|
|
+ ch &= 0x0f;
|
|
|
+ if(ch >= 0x0a) {
|
|
|
+ ch = ch - 0x0a + 'a';
|
|
|
+ } else {
|
|
|
+ ch += '0';
|
|
|
+ }
|
|
|
+
|
|
|
+ putch(ah);
|
|
|
+ putch(ch);
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+void putch(char ch)
|
|
|
+{
|
|
|
+#if defined(__AVR_ATmega128__) || defined(__AVR_ATmega1280__) || defined(__AVR_ATmega1284P__) || defined(__AVR_ATmega644P__)
|
|
|
+ if(bootuart == 1) {
|
|
|
+ while (!(UCSR0A & _BV(UDRE0)));
|
|
|
+ UDR0 = ch;
|
|
|
+ }
|
|
|
+ else if (bootuart == 2) {
|
|
|
+ while (!(UCSR1A & _BV(UDRE1)));
|
|
|
+ UDR1 = ch;
|
|
|
+ }
|
|
|
+#elif defined(__AVR_ATmega168__) || defined(__AVR_ATmega328P__)
|
|
|
+ while (!(UCSR0A & _BV(UDRE0)));
|
|
|
+ UDR0 = ch;
|
|
|
+#else
|
|
|
+ /* m8,16,32,169,8515,8535,163 */
|
|
|
+ while (!(UCSRA & _BV(UDRE)));
|
|
|
+ UDR = ch;
|
|
|
+#endif
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+char getch(void)
|
|
|
+{
|
|
|
+#if defined(__AVR_ATmega128__) || defined(__AVR_ATmega1280__) || defined(__AVR_ATmega1284P__) || defined(__AVR_ATmega644P__)
|
|
|
+ uint32_t count = 0;
|
|
|
+ if(bootuart == 1) {
|
|
|
+ while(!(UCSR0A & _BV(RXC0))) {
|
|
|
+ /* 20060803 DojoCorp:: Addon coming from the previous Bootloader*/
|
|
|
+ /* HACKME:: here is a good place to count times*/
|
|
|
+ count++;
|
|
|
+ if (count > MAX_TIME_COUNT)
|
|
|
+ app_start();
|
|
|
+ }
|
|
|
+
|
|
|
+ return UDR0;
|
|
|
+ }
|
|
|
+ else if(bootuart == 2) {
|
|
|
+ while(!(UCSR1A & _BV(RXC1))) {
|
|
|
+ /* 20060803 DojoCorp:: Addon coming from the previous Bootloader*/
|
|
|
+ /* HACKME:: here is a good place to count times*/
|
|
|
+ count++;
|
|
|
+ if (count > MAX_TIME_COUNT)
|
|
|
+ app_start();
|
|
|
+ }
|
|
|
+
|
|
|
+ return UDR1;
|
|
|
+ }
|
|
|
+ return 0;
|
|
|
+#elif defined(__AVR_ATmega168__) || defined(__AVR_ATmega328P__)
|
|
|
+ uint32_t count = 0;
|
|
|
+ while(!(UCSR0A & _BV(RXC0))){
|
|
|
+ /* 20060803 DojoCorp:: Addon coming from the previous Bootloader*/
|
|
|
+ /* HACKME:: here is a good place to count times*/
|
|
|
+ count++;
|
|
|
+ if (count > MAX_TIME_COUNT)
|
|
|
+ app_start();
|
|
|
+ }
|
|
|
+ return UDR0;
|
|
|
+#else
|
|
|
+ /* m8,16,32,169,8515,8535,163 */
|
|
|
+ uint32_t count = 0;
|
|
|
+ while(!(UCSRA & _BV(RXC))){
|
|
|
+ /* 20060803 DojoCorp:: Addon coming from the previous Bootloader*/
|
|
|
+ /* HACKME:: here is a good place to count times*/
|
|
|
+ count++;
|
|
|
+ if (count > MAX_TIME_COUNT)
|
|
|
+ app_start();
|
|
|
+ }
|
|
|
+ return UDR;
|
|
|
+#endif
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+void getNch(uint8_t count)
|
|
|
+{
|
|
|
+ while(count--) {
|
|
|
+#if defined(__AVR_ATmega128__) || defined(__AVR_ATmega1280__) || defined(__AVR_ATmega1284P__) || defined(__AVR_ATmega644P__)
|
|
|
+ if(bootuart == 1) {
|
|
|
+ while(!(UCSR0A & _BV(RXC0)));
|
|
|
+ UDR0;
|
|
|
+ }
|
|
|
+ else if(bootuart == 2) {
|
|
|
+ while(!(UCSR1A & _BV(RXC1)));
|
|
|
+ UDR1;
|
|
|
+ }
|
|
|
+#elif defined(__AVR_ATmega168__) || defined(__AVR_ATmega328P__)
|
|
|
+ getch();
|
|
|
+#else
|
|
|
+ /* m8,16,32,169,8515,8535,163 */
|
|
|
+ /* 20060803 DojoCorp:: Addon coming from the previous Bootloader*/
|
|
|
+ //while(!(UCSRA & _BV(RXC)));
|
|
|
+ //UDR;
|
|
|
+ getch(); // need to handle time out
|
|
|
+#endif
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+void byte_response(uint8_t val)
|
|
|
+{
|
|
|
+ if (getch() == ' ') {
|
|
|
+ putch(0x14);
|
|
|
+ putch(val);
|
|
|
+ putch(0x10);
|
|
|
+ } else {
|
|
|
+ if (++error_count == MAX_ERROR_COUNT)
|
|
|
+ app_start();
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+void nothing_response(void)
|
|
|
+{
|
|
|
+ if (getch() == ' ') {
|
|
|
+ putch(0x14);
|
|
|
+ putch(0x10);
|
|
|
+ } else {
|
|
|
+ if (++error_count == MAX_ERROR_COUNT)
|
|
|
+ app_start();
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+void flash_led(uint8_t count)
|
|
|
+{
|
|
|
+ while (count--) {
|
|
|
+ LED_PORT |= _BV(LED);
|
|
|
+ _delay_ms(100);
|
|
|
+ LED_PORT &= ~_BV(LED);
|
|
|
+ _delay_ms(100);
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+/* end of file ATmegaBOOT.c */
|