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MarlinFirmware/ArduinoAddons/Arduino_1.x.x/hardware/Sanguino/bootloaders/atmega644p/ATmegaBOOT.c.tst

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/**********************************************************/
/* Serial Bootloader for Atmel megaAVR Controllers */
/* */
/* tested with ATmega644 and ATmega644P */
/* should work with other mega's, see code for details */
/* */
/* ATmegaBOOT.c */
/* */
/* 20090131: Added 324P support from Alex Leone */
/* Marius Kintel */
/* 20080915: applied ADABoot mods for Sanguino 644P */
/* Brian Riley */
/* 20080711: hacked for Sanguino by Zach Smith */
/* and Justin Day */
/* 20070626: hacked for Arduino Diecimila (which auto- */
/* resets when a USB connection is made to it) */
/* by D. Mellis */
/* 20060802: hacked for Arduino by D. Cuartielles */
/* based on a previous hack by D. Mellis */
/* and D. Cuartielles */
/* */
/* Monitor and debug functions were added to the original */
/* code by Dr. Erik Lins, chip45.com. (See below) */
/* */
/* Thanks to Karl Pitrich for fixing a bootloader pin */
/* problem and more informative LED blinking! */
/* */
/* For the latest version see: */
/* http://www.chip45.com/ */
/* */
/* ------------------------------------------------------ */
/* */
/* based on stk500boot.c */
/* Copyright (c) 2003, Jason P. Kyle */
/* All rights reserved. */
/* see avr1.org for original file and information */
/* */
/* This program is free software; you can redistribute it */
/* and/or modify it under the terms of the GNU General */
/* Public License as published by the Free Software */
/* Foundation; either version 2 of the License, or */
/* (at your option) any later version. */
/* */
/* This program is distributed in the hope that it will */
/* be useful, but WITHOUT ANY WARRANTY; without even the */
/* implied warranty of MERCHANTABILITY or FITNESS FOR A */
/* PARTICULAR PURPOSE. See the GNU General Public */
/* License for more details. */
/* */
/* You should have received a copy of the GNU General */
/* Public License along with this program; if not, write */
/* to the Free Software Foundation, Inc., */
/* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/* */
/* Licence can be viewed at */
/* http://www.fsf.org/licenses/gpl.txt */
/* */
/* Target = Atmel AVR m128,m64,m32,m16,m8,m162,m163,m169, */
/* m8515,m8535. ATmega161 has a very small boot block so */
/* isn't supported. */
/* */
/* Tested with m168 */
/**********************************************************/
/* $Id$ */
/* some includes */
#include <inttypes.h>
#include <avr/io.h>
#include <avr/pgmspace.h>
#include <avr/interrupt.h>
#include <avr/wdt.h>
#include <avr/boot.h>
#include <util/delay.h>
#ifdef ADABOOT
#define NUM_LED_FLASHES 3
#define ADABOOT_VER 1
#endif
/* 20070707: hacked by David A. Mellis - after this many errors give up and launch application */
#define MAX_ERROR_COUNT 5
/* set the UART baud rate */
/* 20080711: hack by Zach Hoeken */
#define BAUD_RATE 38400
/* SW_MAJOR and MINOR needs to be updated from time to time to avoid warning message from AVR Studio */
/* never allow AVR Studio to do an update !!!! */
#define HW_VER 0x02
#define SW_MAJOR 0x01
#define SW_MINOR 0x10
/* onboard LED is used to indicate, that the bootloader was entered (3x flashing) */
/* if monitor functions are included, LED goes on after monitor was entered */
#define LED_DDR DDRB
#define LED_PORT PORTB
#define LED_PIN PINB
#define LED PINB0
/* define various device id's */
/* manufacturer byte is always the same */
#define SIG1 0x1E // Yep, Atmel is the only manufacturer of AVR micros. Single source :(
#if defined(__AVR_ATmega1284P__)
#define SIG2 0x97
#define SIG3 0x05
#elif defined(__AVR_ATmega644P__)
#define SIG2 0x96
#define SIG3 0x0A
#elif defined(__AVR_ATmega644__)
#define SIG2 0x96
#define SIG3 0x09
#elif defined(__AVR_ATmega324P__)
#define SIG2 0x95
#define SIG3 0x08
#endif
#define PAGE_SIZE 0x080U //128 words
#define PAGE_SIZE_BYTES 0x100U //256 bytes
/* function prototypes */
void putch(char);
char getch(void);
void getNch(uint8_t);
void byte_response(uint8_t);
void nothing_response(void);
char gethex(void);
void puthex(char);
void flash_led(uint8_t);
/* some variables */
union address_union
{
uint16_t word;
uint8_t byte[2];
} address;
union length_union
{
uint16_t word;
uint8_t byte[2];
} length;
struct flags_struct
{
unsigned eeprom : 1;
unsigned rampz : 1;
} flags;
uint8_t buff[256];
uint8_t error_count = 0;
uint8_t sreg;
void (*app_start)(void) = 0x0000;
/* main program starts here */
int main(void)
{
uint8_t ch,ch2;
uint16_t w;
uint16_t i;
asm volatile("nop\n\t");
#ifdef ADABOOT // BBR/LF 10/8/2007 & 9/13/2008
ch = MCUSR;
MCUSR = 0;
WDTCSR |= _BV(WDCE) | _BV(WDE);
WDTCSR = 0;
// Check if the WDT was used to reset, in which case we dont bootload and skip straight to the code. woot.
if (! (ch & _BV(EXTRF))) // if it's a not an external reset...
app_start(); // skip bootloader
#endif
//initialize our serial port.
UBRR0L = (uint8_t)(F_CPU/(BAUD_RATE*16L)-1);
UBRR0H = (F_CPU/(BAUD_RATE*16L)-1) >> 8;
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);
/* set LED pin as output */
LED_DDR |= _BV(LED);
/* flash onboard LED to signal entering of bootloader */
/* ADABOOT will do two series of flashes. first 4 - signifying ADABOOT */
/* then a pause and another flash series signifying ADABOOT sub-version */
flash_led(NUM_LED_FLASHES);
#ifdef ADABOOT
flash_led(ADABOOT_VER); // BBR 9/13/2008
#endif
/* forever loop */
for (;;)
{
putch('\r');
_delay_ms(500);
}
/* end of forever loop */
}
char gethex(void)
{
char ah,al;
ah = getch();
putch(ah);
al = getch();
putch(al);
if(ah >= 'a')
ah = ah - 'a' + 0x0a;
else if(ah >= '0')
ah -= '0';
if(al >= 'a')
al = al - 'a' + 0x0a;
else if(al >= '0')
al -= '0';
return (ah << 4) + al;
}
void puthex(char ch)
{
char ah,al;
ah = (ch & 0xf0) >> 4;
if(ah >= 0x0a)
ah = ah - 0x0a + 'a';
else
ah += '0';
al = (ch & 0x0f);
if(al >= 0x0a)
al = al - 0x0a + 'a';
else
al += '0';
putch(ah);
putch(al);
}
void putch(char ch)
{
while (!(UCSR0A & _BV(UDRE0)));
UDR0 = ch;
}
char getch(void)
{
uint32_t count = 0;
#ifdef ADABOOT
LED_PORT &= ~_BV(LED); // toggle LED to show activity - BBR/LF 10/3/2007 & 9/13/2008
#endif
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();
}
#ifdef ADABOOT
LED_PORT |= _BV(LED); // toggle LED to show activity - BBR/LF 10/3/2007 & 9/13/2008
#endif
return UDR0;
}
void getNch(uint8_t count)
{
uint8_t i;
for(i=0;i<count;i++)
{
while(!(UCSR0A & _BV(RXC0)));
UDR0;
}
}
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();
}
}
#ifdef ADABOOT
void flash_led(uint8_t count)
{
/* flash onboard LED count times to signal entering of bootloader */
/* l needs to be volatile or the delay loops below might get */
/* optimized away if compiling with optimizations (DAM). */
volatile uint32_t l;
if (count == 0) {
count = ADABOOT;
}
int8_t i;
for (i = 0; i < count; ++i) {
LED_PORT |= _BV(LED); // LED on
for(l = 0; l < (F_CPU / 1000); ++l); // delay NGvalue was 1000 for both loops - BBR
LED_PORT &= ~_BV(LED); // LED off
for(l = 0; l < (F_CPU / 250); ++l); // delay asymmteric for ADA BOOT BBR
}
for(l = 0; l < (F_CPU / 100); ++l); // pause ADA BOOT BBR
}
#else
void flash_led(uint8_t count)
{
/* flash onboard LED three times to signal entering of bootloader */
/* l needs to be volatile or the delay loops below might get
optimized away if compiling with optimizations (DAM). */
volatile uint32_t l;
if (count == 0) {
count = 3;
}
int8_t i;
for (i = 0; i < count; ++i) {
LED_PORT |= _BV(LED);
for(l = 0; l < (F_CPU / 1000); ++l);
LED_PORT &= ~_BV(LED);
for(l = 0; l < (F_CPU / 1000); ++l);
}
}
#endif
/* end of file ATmegaBOOT.c */
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