root / arduino-1.0 / hardware / arduino / bootloaders / atmega / ATmegaBOOT_168.c @ 58d82c77
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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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/* $Id$ */
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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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/* 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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/* Use the F_CPU defined in Makefile */
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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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/* 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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/* 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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/* 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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/* 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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#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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/* 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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#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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/* 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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/* 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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#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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#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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#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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#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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#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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#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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#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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#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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#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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#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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#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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#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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#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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#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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#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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/* 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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/* 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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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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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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uint8_t buff[256];
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uint8_t address_high; |
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uint8_t pagesz=0x80;
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uint8_t i; |
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uint8_t bootuart = 0;
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uint8_t error_count = 0;
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void (*app_start)(void) = 0x0000; |
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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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#ifdef WATCHDOG_MODS
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ch = MCUSR; |
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MCUSR = 0;
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WDTCSR |= _BV(WDCE) | _BV(WDE); |
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WDTCSR = 0;
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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 its 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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/* 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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#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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#if defined __AVR_ATmega1280__
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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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/* 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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#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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#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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/* initialize UART(s) depending on CPU defined */
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#if defined(__AVR_ATmega128__) || defined(__AVR_ATmega1280__)
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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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#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); |
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UBRR0H = (F_CPU/(BAUD_RATE*16L)-1) >> 8; |
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#endif
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UCSR0B = (1<<RXEN0) | (1<<TXEN0); |
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UCSR0C = (1<<UCSZ00) | (1<<UCSZ01); |
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/* Enable internal pull-up resistor on pin D0 (RX), in order
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to supress line noise that prevents the bootloader from
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timing out (DAM: 20070509) */
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DDRD &= ~_BV(PIND0); |
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PORTD |= _BV(PIND0); |
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#elif defined __AVR_ATmega8__
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/* m8 */
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UBRRH = (((F_CPU/BAUD_RATE)/16)-1)>>8; // set baud rate |
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UBRRL = (((F_CPU/BAUD_RATE)/16)-1); |
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UCSRB = (1<<RXEN)|(1<<TXEN); // enable Rx & Tx |
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UCSRC = (1<<URSEL)|(1<<UCSZ1)|(1<<UCSZ0); // config USART; 8N1 |
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#else
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/* m16,m32,m169,m8515,m8535 */
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UBRRL = (uint8_t)(F_CPU/(BAUD_RATE*16L)-1); |
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UBRRH = (F_CPU/(BAUD_RATE*16L)-1) >> 8; |
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UCSRA = 0x00;
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UCSRC = 0x06;
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UCSRB = _BV(TXEN)|_BV(RXEN); |
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#endif
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#if defined __AVR_ATmega1280__
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/* Enable internal pull-up resistor on pin D0 (RX), in order
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to supress line noise that prevents the bootloader from
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timing out (DAM: 20070509) */
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/* feature added to the Arduino Mega --DC: 080930 */
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DDRE &= ~_BV(PINE0); |
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PORTE |= _BV(PINE0); |
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#endif
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/* set LED pin as output */
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LED_DDR |= _BV(LED); |
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/* flash onboard LED to signal entering of bootloader */
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#if defined(__AVR_ATmega128__) || defined(__AVR_ATmega1280__)
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// 4x for UART0, 5x for UART1
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flash_led(NUM_LED_FLASHES + bootuart); |
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#else
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flash_led(NUM_LED_FLASHES); |
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#endif
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/* 20050803: by DojoCorp, this is one of the parts provoking the
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system to stop listening, cancelled from the original */
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//putch('\0');
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/* forever loop */
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for (;;) {
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/* get character from UART */
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ch = getch(); |
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/* A bunch of if...else if... gives smaller code than switch...case ! */
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/* Hello is anyone home ? */
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if(ch=='0') { |
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nothing_response(); |
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} |
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/* Request programmer ID */
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/* Not using PROGMEM string due to boot block in m128 being beyond 64kB boundry */
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/* Would need to selectively manipulate RAMPZ, and it's only 9 characters anyway so who cares. */
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else if(ch=='1') { |
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if (getch() == ' ') { |
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putch(0x14);
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putch('A');
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putch('V');
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putch('R');
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putch(' ');
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putch('I');
|
| 457 |
putch('S');
|
| 458 |
putch('P');
|
| 459 |
putch(0x10);
|
| 460 |
} else {
|
| 461 |
if (++error_count == MAX_ERROR_COUNT)
|
| 462 |
app_start(); |
| 463 |
} |
| 464 |
} |
| 465 |
|
| 466 |
|
| 467 |
/* AVR ISP/STK500 board commands DON'T CARE so default nothing_response */
|
| 468 |
else if(ch=='@') { |
| 469 |
ch2 = getch(); |
| 470 |
if (ch2>0x85) getch(); |
| 471 |
nothing_response(); |
| 472 |
} |
| 473 |
|
| 474 |
|
| 475 |
/* AVR ISP/STK500 board requests */
|
| 476 |
else if(ch=='A') { |
| 477 |
ch2 = getch(); |
| 478 |
if(ch2==0x80) byte_response(HW_VER); // Hardware version |
| 479 |
else if(ch2==0x81) byte_response(SW_MAJOR); // Software major version |
| 480 |
else if(ch2==0x82) byte_response(SW_MINOR); // Software minor version |
| 481 |
else if(ch2==0x98) byte_response(0x03); // Unknown but seems to be required by avr studio 3.56 |
| 482 |
else byte_response(0x00); // Covers various unnecessary responses we don't care about |
| 483 |
} |
| 484 |
|
| 485 |
|
| 486 |
/* Device Parameters DON'T CARE, DEVICE IS FIXED */
|
| 487 |
else if(ch=='B') { |
| 488 |
getNch(20);
|
| 489 |
nothing_response(); |
| 490 |
} |
| 491 |
|
| 492 |
|
| 493 |
/* Parallel programming stuff DON'T CARE */
|
| 494 |
else if(ch=='E') { |
| 495 |
getNch(5);
|
| 496 |
nothing_response(); |
| 497 |
} |
| 498 |
|
| 499 |
|
| 500 |
/* P: Enter programming mode */
|
| 501 |
/* R: Erase device, don't care as we will erase one page at a time anyway. */
|
| 502 |
else if(ch=='P' || ch=='R') { |
| 503 |
nothing_response(); |
| 504 |
} |
| 505 |
|
| 506 |
|
| 507 |
/* Leave programming mode */
|
| 508 |
else if(ch=='Q') { |
| 509 |
nothing_response(); |
| 510 |
#ifdef WATCHDOG_MODS
|
| 511 |
// autoreset via watchdog (sneaky!)
|
| 512 |
WDTCSR = _BV(WDE); |
| 513 |
while (1); // 16 ms |
| 514 |
#endif
|
| 515 |
} |
| 516 |
|
| 517 |
|
| 518 |
/* Set address, little endian. EEPROM in bytes, FLASH in words */
|
| 519 |
/* Perhaps extra address bytes may be added in future to support > 128kB FLASH. */
|
| 520 |
/* This might explain why little endian was used here, big endian used everywhere else. */
|
| 521 |
else if(ch=='U') { |
| 522 |
address.byte[0] = getch();
|
| 523 |
address.byte[1] = getch();
|
| 524 |
nothing_response(); |
| 525 |
} |
| 526 |
|
| 527 |
|
| 528 |
/* Universal SPI programming command, disabled. Would be used for fuses and lock bits. */
|
| 529 |
else if(ch=='V') { |
| 530 |
if (getch() == 0x30) { |
| 531 |
getch(); |
| 532 |
ch = getch(); |
| 533 |
getch(); |
| 534 |
if (ch == 0) { |
| 535 |
byte_response(SIG1); |
| 536 |
} else if (ch == 1) { |
| 537 |
byte_response(SIG2); |
| 538 |
} else {
|
| 539 |
byte_response(SIG3); |
| 540 |
} |
| 541 |
} else {
|
| 542 |
getNch(3);
|
| 543 |
byte_response(0x00);
|
| 544 |
} |
| 545 |
} |
| 546 |
|
| 547 |
|
| 548 |
/* Write memory, length is big endian and is in bytes */
|
| 549 |
else if(ch=='d') { |
| 550 |
length.byte[1] = getch();
|
| 551 |
length.byte[0] = getch();
|
| 552 |
flags.eeprom = 0;
|
| 553 |
if (getch() == 'E') flags.eeprom = 1; |
| 554 |
for (w=0;w<length.word;w++) { |
| 555 |
buff[w] = getch(); // Store data in buffer, can't keep up with serial data stream whilst programming pages
|
| 556 |
} |
| 557 |
if (getch() == ' ') { |
| 558 |
if (flags.eeprom) { //Write to EEPROM one byte at a time |
| 559 |
address.word <<= 1;
|
| 560 |
for(w=0;w<length.word;w++) { |
| 561 |
#if defined(__AVR_ATmega168__) || defined(__AVR_ATmega328P__)
|
| 562 |
while(EECR & (1<<EEPE)); |
| 563 |
EEAR = (uint16_t)(void *)address.word;
|
| 564 |
EEDR = buff[w]; |
| 565 |
EECR |= (1<<EEMPE);
|
| 566 |
EECR |= (1<<EEPE);
|
| 567 |
#else
|
| 568 |
eeprom_write_byte((void *)address.word,buff[w]);
|
| 569 |
#endif
|
| 570 |
address.word++; |
| 571 |
} |
| 572 |
} |
| 573 |
else { //Write to FLASH one page at a time |
| 574 |
if (address.byte[1]>127) address_high = 0x01; //Only possible with m128, m256 will need 3rd address byte. FIXME |
| 575 |
else address_high = 0x00; |
| 576 |
#if defined(__AVR_ATmega128__) || defined(__AVR_ATmega1280__) || defined(__AVR_ATmega1281__)
|
| 577 |
RAMPZ = address_high; |
| 578 |
#endif
|
| 579 |
address.word = address.word << 1; //address * 2 -> byte location |
| 580 |
/* if ((length.byte[0] & 0x01) == 0x01) length.word++; //Even up an odd number of bytes */
|
| 581 |
if ((length.byte[0] & 0x01)) length.word++; //Even up an odd number of bytes |
| 582 |
cli(); //Disable interrupts, just to be sure
|
| 583 |
#if defined(__AVR_ATmega1280__) || defined(__AVR_ATmega1281__)
|
| 584 |
while(bit_is_set(EECR,EEPE)); //Wait for previous EEPROM writes to complete |
| 585 |
#else
|
| 586 |
while(bit_is_set(EECR,EEWE)); //Wait for previous EEPROM writes to complete |
| 587 |
#endif
|
| 588 |
asm volatile( |
| 589 |
"clr r17 \n\t" //page_word_count |
| 590 |
"lds r30,address \n\t" //Address of FLASH location (in bytes) |
| 591 |
"lds r31,address+1 \n\t"
|
| 592 |
"ldi r28,lo8(buff) \n\t" //Start of buffer array in RAM |
| 593 |
"ldi r29,hi8(buff) \n\t"
|
| 594 |
"lds r24,length \n\t" //Length of data to be written (in bytes) |
| 595 |
"lds r25,length+1 \n\t"
|
| 596 |
"length_loop: \n\t" //Main loop, repeat for number of words in block |
| 597 |
"cpi r17,0x00 \n\t" //If page_word_count=0 then erase page |
| 598 |
"brne no_page_erase \n\t"
|
| 599 |
"wait_spm1: \n\t"
|
| 600 |
"lds r16,%0 \n\t" //Wait for previous spm to complete |
| 601 |
"andi r16,1 \n\t"
|
| 602 |
"cpi r16,1 \n\t"
|
| 603 |
"breq wait_spm1 \n\t"
|
| 604 |
"ldi r16,0x03 \n\t" //Erase page pointed to by Z |
| 605 |
"sts %0,r16 \n\t"
|
| 606 |
"spm \n\t"
|
| 607 |
#ifdef __AVR_ATmega163__
|
| 608 |
".word 0xFFFF \n\t"
|
| 609 |
"nop \n\t"
|
| 610 |
#endif
|
| 611 |
"wait_spm2: \n\t"
|
| 612 |
"lds r16,%0 \n\t" //Wait for previous spm to complete |
| 613 |
"andi r16,1 \n\t"
|
| 614 |
"cpi r16,1 \n\t"
|
| 615 |
"breq wait_spm2 \n\t"
|
| 616 |
|
| 617 |
"ldi r16,0x11 \n\t" //Re-enable RWW section |
| 618 |
"sts %0,r16 \n\t"
|
| 619 |
"spm \n\t"
|
| 620 |
#ifdef __AVR_ATmega163__
|
| 621 |
".word 0xFFFF \n\t"
|
| 622 |
"nop \n\t"
|
| 623 |
#endif
|
| 624 |
"no_page_erase: \n\t"
|
| 625 |
"ld r0,Y+ \n\t" //Write 2 bytes into page buffer |
| 626 |
"ld r1,Y+ \n\t"
|
| 627 |
|
| 628 |
"wait_spm3: \n\t"
|
| 629 |
"lds r16,%0 \n\t" //Wait for previous spm to complete |
| 630 |
"andi r16,1 \n\t"
|
| 631 |
"cpi r16,1 \n\t"
|
| 632 |
"breq wait_spm3 \n\t"
|
| 633 |
"ldi r16,0x01 \n\t" //Load r0,r1 into FLASH page buffer |
| 634 |
"sts %0,r16 \n\t"
|
| 635 |
"spm \n\t"
|
| 636 |
|
| 637 |
"inc r17 \n\t" //page_word_count++ |
| 638 |
"cpi r17,%1 \n\t"
|
| 639 |
"brlo same_page \n\t" //Still same page in FLASH |
| 640 |
"write_page: \n\t"
|
| 641 |
"clr r17 \n\t" //New page, write current one first |
| 642 |
"wait_spm4: \n\t"
|
| 643 |
"lds r16,%0 \n\t" //Wait for previous spm to complete |
| 644 |
"andi r16,1 \n\t"
|
| 645 |
"cpi r16,1 \n\t"
|
| 646 |
"breq wait_spm4 \n\t"
|
| 647 |
#ifdef __AVR_ATmega163__
|
| 648 |
"andi r30,0x80 \n\t" // m163 requires Z6:Z1 to be zero during page write |
| 649 |
#endif
|
| 650 |
"ldi r16,0x05 \n\t" //Write page pointed to by Z |
| 651 |
"sts %0,r16 \n\t"
|
| 652 |
"spm \n\t"
|
| 653 |
#ifdef __AVR_ATmega163__
|
| 654 |
".word 0xFFFF \n\t"
|
| 655 |
"nop \n\t"
|
| 656 |
"ori r30,0x7E \n\t" // recover Z6:Z1 state after page write (had to be zero during write) |
| 657 |
#endif
|
| 658 |
"wait_spm5: \n\t"
|
| 659 |
"lds r16,%0 \n\t" //Wait for previous spm to complete |
| 660 |
"andi r16,1 \n\t"
|
| 661 |
"cpi r16,1 \n\t"
|
| 662 |
"breq wait_spm5 \n\t"
|
| 663 |
"ldi r16,0x11 \n\t" //Re-enable RWW section |
| 664 |
"sts %0,r16 \n\t"
|
| 665 |
"spm \n\t"
|
| 666 |
#ifdef __AVR_ATmega163__
|
| 667 |
".word 0xFFFF \n\t"
|
| 668 |
"nop \n\t"
|
| 669 |
#endif
|
| 670 |
"same_page: \n\t"
|
| 671 |
"adiw r30,2 \n\t" //Next word in FLASH |
| 672 |
"sbiw r24,2 \n\t" //length-2 |
| 673 |
"breq final_write \n\t" //Finished |
| 674 |
"rjmp length_loop \n\t"
|
| 675 |
"final_write: \n\t"
|
| 676 |
"cpi r17,0 \n\t"
|
| 677 |
"breq block_done \n\t"
|
| 678 |
"adiw r24,2 \n\t" //length+2, fool above check on length after short page write |
| 679 |
"rjmp write_page \n\t"
|
| 680 |
"block_done: \n\t"
|
| 681 |
"clr __zero_reg__ \n\t" //restore zero register |
| 682 |
#if defined __AVR_ATmega168__ || __AVR_ATmega328P__ || __AVR_ATmega128__ || __AVR_ATmega1280__ || __AVR_ATmega1281__
|
| 683 |
: "=m" (SPMCSR) : "M" (PAGE_SIZE) : "r0","r16","r17","r24","r25","r28","r29","r30","r31" |
| 684 |
#else
|
| 685 |
: "=m" (SPMCR) : "M" (PAGE_SIZE) : "r0","r16","r17","r24","r25","r28","r29","r30","r31" |
| 686 |
#endif
|
| 687 |
); |
| 688 |
/* Should really add a wait for RWW section to be enabled, don't actually need it since we never */
|
| 689 |
/* exit the bootloader without a power cycle anyhow */
|
| 690 |
} |
| 691 |
putch(0x14);
|
| 692 |
putch(0x10);
|
| 693 |
} else {
|
| 694 |
if (++error_count == MAX_ERROR_COUNT)
|
| 695 |
app_start(); |
| 696 |
} |
| 697 |
} |
| 698 |
|
| 699 |
|
| 700 |
/* Read memory block mode, length is big endian. */
|
| 701 |
else if(ch=='t') { |
| 702 |
length.byte[1] = getch();
|
| 703 |
length.byte[0] = getch();
|
| 704 |
#if defined(__AVR_ATmega128__) || defined(__AVR_ATmega1280__)
|
| 705 |
if (address.word>0x7FFF) flags.rampz = 1; // No go with m256, FIXME |
| 706 |
else flags.rampz = 0; |
| 707 |
#endif
|
| 708 |
address.word = address.word << 1; // address * 2 -> byte location |
| 709 |
if (getch() == 'E') flags.eeprom = 1; |
| 710 |
else flags.eeprom = 0; |
| 711 |
if (getch() == ' ') { // Command terminator |
| 712 |
putch(0x14);
|
| 713 |
for (w=0;w < length.word;w++) { // Can handle odd and even lengths okay |
| 714 |
if (flags.eeprom) { // Byte access EEPROM read |
| 715 |
#if defined(__AVR_ATmega168__) || defined(__AVR_ATmega328P__)
|
| 716 |
while(EECR & (1<<EEPE)); |
| 717 |
EEAR = (uint16_t)(void *)address.word;
|
| 718 |
EECR |= (1<<EERE);
|
| 719 |
putch(EEDR); |
| 720 |
#else
|
| 721 |
putch(eeprom_read_byte((void *)address.word));
|
| 722 |
#endif
|
| 723 |
address.word++; |
| 724 |
} |
| 725 |
else {
|
| 726 |
|
| 727 |
if (!flags.rampz) putch(pgm_read_byte_near(address.word));
|
| 728 |
#if defined(__AVR_ATmega128__) || defined(__AVR_ATmega1280__)
|
| 729 |
else putch(pgm_read_byte_far(address.word + 0x10000)); |
| 730 |
// Hmmmm, yuck FIXME when m256 arrvies
|
| 731 |
#endif
|
| 732 |
address.word++; |
| 733 |
} |
| 734 |
} |
| 735 |
putch(0x10);
|
| 736 |
} |
| 737 |
} |
| 738 |
|
| 739 |
|
| 740 |
/* Get device signature bytes */
|
| 741 |
else if(ch=='u') { |
| 742 |
if (getch() == ' ') { |
| 743 |
putch(0x14);
|
| 744 |
putch(SIG1); |
| 745 |
putch(SIG2); |
| 746 |
putch(SIG3); |
| 747 |
putch(0x10);
|
| 748 |
} else {
|
| 749 |
if (++error_count == MAX_ERROR_COUNT)
|
| 750 |
app_start(); |
| 751 |
} |
| 752 |
} |
| 753 |
|
| 754 |
|
| 755 |
/* Read oscillator calibration byte */
|
| 756 |
else if(ch=='v') { |
| 757 |
byte_response(0x00);
|
| 758 |
} |
| 759 |
|
| 760 |
|
| 761 |
#if defined MONITOR
|
| 762 |
|
| 763 |
/* here come the extended monitor commands by Erik Lins */
|
| 764 |
|
| 765 |
/* check for three times exclamation mark pressed */
|
| 766 |
else if(ch=='!') { |
| 767 |
ch = getch(); |
| 768 |
if(ch=='!') { |
| 769 |
ch = getch(); |
| 770 |
if(ch=='!') { |
| 771 |
PGM_P welcome = "";
|
| 772 |
#if defined(__AVR_ATmega128__) || defined(__AVR_ATmega1280__)
|
| 773 |
uint16_t extaddr; |
| 774 |
#endif
|
| 775 |
uint8_t addrl, addrh; |
| 776 |
|
| 777 |
#ifdef CRUMB128
|
| 778 |
welcome = "ATmegaBOOT / Crumb128 - (C) J.P.Kyle, E.Lins - 050815\n\r";
|
| 779 |
#elif defined PROBOMEGA128
|
| 780 |
welcome = "ATmegaBOOT / PROBOmega128 - (C) J.P.Kyle, E.Lins - 050815\n\r";
|
| 781 |
#elif defined SAVVY128
|
| 782 |
welcome = "ATmegaBOOT / Savvy128 - (C) J.P.Kyle, E.Lins - 050815\n\r";
|
| 783 |
#elif defined __AVR_ATmega1280__
|
| 784 |
welcome = "ATmegaBOOT / Arduino Mega - (C) Arduino LLC - 090930\n\r";
|
| 785 |
#endif
|
| 786 |
|
| 787 |
/* turn on LED */
|
| 788 |
LED_DDR |= _BV(LED); |
| 789 |
LED_PORT &= ~_BV(LED); |
| 790 |
|
| 791 |
/* print a welcome message and command overview */
|
| 792 |
for(i=0; welcome[i] != '\0'; ++i) { |
| 793 |
putch(welcome[i]); |
| 794 |
} |
| 795 |
|
| 796 |
/* test for valid commands */
|
| 797 |
for(;;) {
|
| 798 |
putch('\n');
|
| 799 |
putch('\r');
|
| 800 |
putch(':');
|
| 801 |
putch(' ');
|
| 802 |
|
| 803 |
ch = getch(); |
| 804 |
putch(ch); |
| 805 |
|
| 806 |
/* toggle LED */
|
| 807 |
if(ch == 't') { |
| 808 |
if(bit_is_set(LED_PIN,LED)) {
|
| 809 |
LED_PORT &= ~_BV(LED); |
| 810 |
putch('1');
|
| 811 |
} else {
|
| 812 |
LED_PORT |= _BV(LED); |
| 813 |
putch('0');
|
| 814 |
} |
| 815 |
} |
| 816 |
|
| 817 |
/* read byte from address */
|
| 818 |
else if(ch == 'r') { |
| 819 |
ch = getch(); putch(ch); |
| 820 |
addrh = gethex(); |
| 821 |
addrl = gethex(); |
| 822 |
putch('=');
|
| 823 |
ch = *(uint8_t *)((addrh << 8) + addrl);
|
| 824 |
puthex(ch); |
| 825 |
} |
| 826 |
|
| 827 |
/* write a byte to address */
|
| 828 |
else if(ch == 'w') { |
| 829 |
ch = getch(); putch(ch); |
| 830 |
addrh = gethex(); |
| 831 |
addrl = gethex(); |
| 832 |
ch = getch(); putch(ch); |
| 833 |
ch = gethex(); |
| 834 |
*(uint8_t *)((addrh << 8) + addrl) = ch;
|
| 835 |
} |
| 836 |
|
| 837 |
/* read from uart and echo back */
|
| 838 |
else if(ch == 'u') { |
| 839 |
for(;;) {
|
| 840 |
putch(getch()); |
| 841 |
} |
| 842 |
} |
| 843 |
#if defined(__AVR_ATmega128__) || defined(__AVR_ATmega1280__)
|
| 844 |
/* external bus loop */
|
| 845 |
else if(ch == 'b') { |
| 846 |
putch('b');
|
| 847 |
putch('u');
|
| 848 |
putch('s');
|
| 849 |
MCUCR = 0x80;
|
| 850 |
XMCRA = 0;
|
| 851 |
XMCRB = 0;
|
| 852 |
extaddr = 0x1100;
|
| 853 |
for(;;) {
|
| 854 |
ch = *(volatile uint8_t *)extaddr;
|
| 855 |
if(++extaddr == 0) { |
| 856 |
extaddr = 0x1100;
|
| 857 |
} |
| 858 |
} |
| 859 |
} |
| 860 |
#endif
|
| 861 |
|
| 862 |
else if(ch == 'j') { |
| 863 |
app_start(); |
| 864 |
} |
| 865 |
|
| 866 |
} /* end of monitor functions */
|
| 867 |
|
| 868 |
} |
| 869 |
} |
| 870 |
} |
| 871 |
/* end of monitor */
|
| 872 |
#endif
|
| 873 |
else if (++error_count == MAX_ERROR_COUNT) { |
| 874 |
app_start(); |
| 875 |
} |
| 876 |
} /* end of forever loop */
|
| 877 |
|
| 878 |
} |
| 879 |
|
| 880 |
|
| 881 |
char gethexnib(void) { |
| 882 |
char a;
|
| 883 |
a = getch(); putch(a); |
| 884 |
if(a >= 'a') { |
| 885 |
return (a - 'a' + 0x0a); |
| 886 |
} else if(a >= '0') { |
| 887 |
return(a - '0'); |
| 888 |
} |
| 889 |
return a;
|
| 890 |
} |
| 891 |
|
| 892 |
|
| 893 |
char gethex(void) { |
| 894 |
return (gethexnib() << 4) + gethexnib(); |
| 895 |
} |
| 896 |
|
| 897 |
|
| 898 |
void puthex(char ch) { |
| 899 |
char ah;
|
| 900 |
|
| 901 |
ah = ch >> 4;
|
| 902 |
if(ah >= 0x0a) { |
| 903 |
ah = ah - 0x0a + 'a'; |
| 904 |
} else {
|
| 905 |
ah += '0';
|
| 906 |
} |
| 907 |
|
| 908 |
ch &= 0x0f;
|
| 909 |
if(ch >= 0x0a) { |
| 910 |
ch = ch - 0x0a + 'a'; |
| 911 |
} else {
|
| 912 |
ch += '0';
|
| 913 |
} |
| 914 |
|
| 915 |
putch(ah); |
| 916 |
putch(ch); |
| 917 |
} |
| 918 |
|
| 919 |
|
| 920 |
void putch(char ch) |
| 921 |
{
|
| 922 |
#if defined(__AVR_ATmega128__) || defined(__AVR_ATmega1280__)
|
| 923 |
if(bootuart == 1) { |
| 924 |
while (!(UCSR0A & _BV(UDRE0)));
|
| 925 |
UDR0 = ch; |
| 926 |
} |
| 927 |
else if (bootuart == 2) { |
| 928 |
while (!(UCSR1A & _BV(UDRE1)));
|
| 929 |
UDR1 = ch; |
| 930 |
} |
| 931 |
#elif defined(__AVR_ATmega168__) || defined(__AVR_ATmega328P__)
|
| 932 |
while (!(UCSR0A & _BV(UDRE0)));
|
| 933 |
UDR0 = ch; |
| 934 |
#else
|
| 935 |
/* m8,16,32,169,8515,8535,163 */
|
| 936 |
while (!(UCSRA & _BV(UDRE)));
|
| 937 |
UDR = ch; |
| 938 |
#endif
|
| 939 |
} |
| 940 |
|
| 941 |
|
| 942 |
char getch(void) |
| 943 |
{
|
| 944 |
#if defined(__AVR_ATmega128__) || defined(__AVR_ATmega1280__)
|
| 945 |
uint32_t count = 0;
|
| 946 |
if(bootuart == 1) { |
| 947 |
while(!(UCSR0A & _BV(RXC0))) {
|
| 948 |
/* 20060803 DojoCorp:: Addon coming from the previous Bootloader*/
|
| 949 |
/* HACKME:: here is a good place to count times*/
|
| 950 |
count++; |
| 951 |
if (count > MAX_TIME_COUNT)
|
| 952 |
app_start(); |
| 953 |
} |
| 954 |
|
| 955 |
return UDR0;
|
| 956 |
} |
| 957 |
else if(bootuart == 2) { |
| 958 |
while(!(UCSR1A & _BV(RXC1))) {
|
| 959 |
/* 20060803 DojoCorp:: Addon coming from the previous Bootloader*/
|
| 960 |
/* HACKME:: here is a good place to count times*/
|
| 961 |
count++; |
| 962 |
if (count > MAX_TIME_COUNT)
|
| 963 |
app_start(); |
| 964 |
} |
| 965 |
|
| 966 |
return UDR1;
|
| 967 |
} |
| 968 |
return 0; |
| 969 |
#elif defined(__AVR_ATmega168__) || defined(__AVR_ATmega328P__)
|
| 970 |
uint32_t count = 0;
|
| 971 |
while(!(UCSR0A & _BV(RXC0))){
|
| 972 |
/* 20060803 DojoCorp:: Addon coming from the previous Bootloader*/
|
| 973 |
/* HACKME:: here is a good place to count times*/
|
| 974 |
count++; |
| 975 |
if (count > MAX_TIME_COUNT)
|
| 976 |
app_start(); |
| 977 |
} |
| 978 |
return UDR0;
|
| 979 |
#else
|
| 980 |
/* m8,16,32,169,8515,8535,163 */
|
| 981 |
uint32_t count = 0;
|
| 982 |
while(!(UCSRA & _BV(RXC))){
|
| 983 |
/* 20060803 DojoCorp:: Addon coming from the previous Bootloader*/
|
| 984 |
/* HACKME:: here is a good place to count times*/
|
| 985 |
count++; |
| 986 |
if (count > MAX_TIME_COUNT)
|
| 987 |
app_start(); |
| 988 |
} |
| 989 |
return UDR;
|
| 990 |
#endif
|
| 991 |
} |
| 992 |
|
| 993 |
|
| 994 |
void getNch(uint8_t count)
|
| 995 |
{
|
| 996 |
while(count--) {
|
| 997 |
#if defined(__AVR_ATmega128__) || defined(__AVR_ATmega1280__)
|
| 998 |
if(bootuart == 1) { |
| 999 |
while(!(UCSR0A & _BV(RXC0)));
|
| 1000 |
UDR0; |
| 1001 |
} |
| 1002 |
else if(bootuart == 2) { |
| 1003 |
while(!(UCSR1A & _BV(RXC1)));
|
| 1004 |
UDR1; |
| 1005 |
} |
| 1006 |
#elif defined(__AVR_ATmega168__) || defined(__AVR_ATmega328P__)
|
| 1007 |
getch(); |
| 1008 |
#else
|
| 1009 |
/* m8,16,32,169,8515,8535,163 */
|
| 1010 |
/* 20060803 DojoCorp:: Addon coming from the previous Bootloader*/
|
| 1011 |
//while(!(UCSRA & _BV(RXC)));
|
| 1012 |
//UDR;
|
| 1013 |
getch(); // need to handle time out
|
| 1014 |
#endif
|
| 1015 |
} |
| 1016 |
} |
| 1017 |
|
| 1018 |
|
| 1019 |
void byte_response(uint8_t val)
|
| 1020 |
{
|
| 1021 |
if (getch() == ' ') { |
| 1022 |
putch(0x14);
|
| 1023 |
putch(val); |
| 1024 |
putch(0x10);
|
| 1025 |
} else {
|
| 1026 |
if (++error_count == MAX_ERROR_COUNT)
|
| 1027 |
app_start(); |
| 1028 |
} |
| 1029 |
} |
| 1030 |
|
| 1031 |
|
| 1032 |
void nothing_response(void) |
| 1033 |
{
|
| 1034 |
if (getch() == ' ') { |
| 1035 |
putch(0x14);
|
| 1036 |
putch(0x10);
|
| 1037 |
} else {
|
| 1038 |
if (++error_count == MAX_ERROR_COUNT)
|
| 1039 |
app_start(); |
| 1040 |
} |
| 1041 |
} |
| 1042 |
|
| 1043 |
void flash_led(uint8_t count)
|
| 1044 |
{
|
| 1045 |
while (count--) {
|
| 1046 |
LED_PORT |= _BV(LED); |
| 1047 |
_delay_ms(100);
|
| 1048 |
LED_PORT &= ~_BV(LED); |
| 1049 |
_delay_ms(100);
|
| 1050 |
} |
| 1051 |
} |
| 1052 |
|
| 1053 |
|
| 1054 |
/* end of file ATmegaBOOT.c */
|