1091 lines
31 KiB
C
1091 lines
31 KiB
C
/**********************************************************/
|
|
/* Serial Bootloader for Atmel megaAVR Controllers */
|
|
/* */
|
|
/* tested with ATmega8, ATmega128 and ATmega168 */
|
|
/* should work with other mega's, see code for details */
|
|
/* */
|
|
/* ATmegaBOOT.c */
|
|
/* */
|
|
/* */
|
|
/* 20090308: integrated Mega changes into main bootloader */
|
|
/* source by D. Mellis */
|
|
/* 20080930: hacked for Arduino Mega (with the 1280 */
|
|
/* processor, backwards compatible) */
|
|
/* by D. Cuartielles */
|
|
/* 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 <util/delay.h>
|
|
|
|
/* the current avr-libc eeprom functions do not support the ATmega168 */
|
|
/* own eeprom write/read functions are used instead */
|
|
#if !defined(__AVR_ATmega168__) || !defined(__AVR_ATmega328P__)
|
|
#include <avr/eeprom.h>
|
|
#endif
|
|
|
|
/* Use the F_CPU defined in Makefile */
|
|
|
|
/* 20060803: hacked by DojoCorp */
|
|
/* 20070626: hacked by David A. Mellis to decrease waiting time for auto-reset */
|
|
/* set the waiting time for the bootloader */
|
|
/* get this from the Makefile instead */
|
|
/* #define MAX_TIME_COUNT (F_CPU>>4) */
|
|
|
|
/* 20070707: hacked by David A. Mellis - after this many errors give up and launch application */
|
|
#define MAX_ERROR_COUNT 5
|
|
#define NUM_LED_FLASHES 3
|
|
/* set the UART baud rate */
|
|
/* 20060803: hacked by DojoCorp */
|
|
//#define BAUD_RATE 115200
|
|
#ifndef BAUD_RATE
|
|
#define BAUD_RATE 19200
|
|
#endif
|
|
|
|
|
|
/* 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
|
|
|
|
|
|
/* Adjust to suit whatever pin your hardware uses to enter the bootloader */
|
|
/* ATmega128 has two UARTS so two pins are used to enter bootloader and select UART */
|
|
/* ATmega1280 has four UARTS, but for Arduino Mega, we will only use RXD0 to get code */
|
|
/* BL0... means UART0, BL1... means UART1 */
|
|
#ifdef __AVR_ATmega128__
|
|
#define BL_DDR DDRF
|
|
#define BL_PORT PORTF
|
|
#define BL_PIN PINF
|
|
#define BL0 PINF7
|
|
#define BL1 PINF6
|
|
#elif defined __AVR_ATmega1280__
|
|
/* we just don't do anything for the MEGA and enter bootloader on reset anyway*/
|
|
#elif defined __AVR_ATmega1284P__
|
|
|
|
#else
|
|
/* other ATmegas have only one UART, so only one pin is defined to enter bootloader */
|
|
#define BL_DDR DDRD
|
|
#define BL_PORT PORTD
|
|
#define BL_PIN PIND
|
|
#define BL PIND6
|
|
#endif
|
|
|
|
|
|
/* 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 */
|
|
#if defined __AVR_ATmega128__ || defined __AVR_ATmega1280__
|
|
/* Onboard LED is connected to pin PB7 (e.g. Crumb128, PROBOmega128, Savvy128, Arduino Mega) */
|
|
#define LED_DDR DDRB
|
|
#define LED_PORT PORTB
|
|
#define LED_PIN PINB
|
|
#define LED PINB7
|
|
#elif defined __AVR_ATmega1284P__
|
|
#define LED_DDR DDRB
|
|
#define LED_PORT PORTB
|
|
#define LED_PIN PINB
|
|
#define LED PINB0
|
|
#else
|
|
/* Onboard LED is connected to pin PB5 in Arduino NG, Diecimila, and Duomilanuove */
|
|
/* other boards like e.g. Crumb8, Crumb168 are using PB2 */
|
|
#define LED_DDR DDRB
|
|
#define LED_PORT PORTB
|
|
#define LED_PIN PINB
|
|
#define LED PINB5
|
|
#endif
|
|
|
|
|
|
/* monitor functions will only be compiled when using ATmega128, due to bootblock size constraints */
|
|
#if defined(__AVR_ATmega128__) || defined(__AVR_ATmega1280__)
|
|
//#define MONITOR 1
|
|
#endif
|
|
#undef MONITOR
|
|
|
|
/* 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_ATmega1280__
|
|
#define SIG2 0x97
|
|
#define SIG3 0x03
|
|
#define PAGE_SIZE 0x80U //128 words
|
|
|
|
#elif defined __AVR_ATmega1284P__
|
|
#define SIG2 0x97
|
|
#define SIG3 0x05
|
|
#define PAGE_SIZE 0x080U //128 words
|
|
|
|
#elif defined __AVR_ATmega1281__
|
|
#define SIG2 0x97
|
|
#define SIG3 0x04
|
|
#define PAGE_SIZE 0x80U //128 words
|
|
|
|
#elif defined __AVR_ATmega128__
|
|
#define SIG2 0x97
|
|
#define SIG3 0x02
|
|
#define PAGE_SIZE 0x80U //128 words
|
|
|
|
#elif defined __AVR_ATmega64__
|
|
#define SIG2 0x96
|
|
#define SIG3 0x02
|
|
#define PAGE_SIZE 0x80U //128 words
|
|
|
|
#elif defined __AVR_ATmega32__
|
|
#define SIG2 0x95
|
|
#define SIG3 0x02
|
|
#define PAGE_SIZE 0x40U //64 words
|
|
|
|
#elif defined __AVR_ATmega16__
|
|
#define SIG2 0x94
|
|
#define SIG3 0x03
|
|
#define PAGE_SIZE 0x40U //64 words
|
|
|
|
#elif defined __AVR_ATmega8__
|
|
#define SIG2 0x93
|
|
#define SIG3 0x07
|
|
#define PAGE_SIZE 0x20U //32 words
|
|
|
|
#elif defined __AVR_ATmega88__
|
|
#define SIG2 0x93
|
|
#define SIG3 0x0a
|
|
#define PAGE_SIZE 0x20U //32 words
|
|
|
|
#elif defined __AVR_ATmega168__
|
|
#define SIG2 0x94
|
|
#define SIG3 0x06
|
|
#define PAGE_SIZE 0x40U //64 words
|
|
|
|
#elif defined __AVR_ATmega328P__
|
|
#define SIG2 0x95
|
|
#define SIG3 0x0F
|
|
#define PAGE_SIZE 0x40U //64 words
|
|
|
|
#elif defined __AVR_ATmega162__
|
|
#define SIG2 0x94
|
|
#define SIG3 0x04
|
|
#define PAGE_SIZE 0x40U //64 words
|
|
|
|
#elif defined __AVR_ATmega163__
|
|
#define SIG2 0x94
|
|
#define SIG3 0x02
|
|
#define PAGE_SIZE 0x40U //64 words
|
|
|
|
#elif defined __AVR_ATmega169__
|
|
#define SIG2 0x94
|
|
#define SIG3 0x05
|
|
#define PAGE_SIZE 0x40U //64 words
|
|
|
|
#elif defined __AVR_ATmega8515__
|
|
#define SIG2 0x93
|
|
#define SIG3 0x06
|
|
#define PAGE_SIZE 0x20U //32 words
|
|
|
|
#elif defined __AVR_ATmega8535__
|
|
#define SIG2 0x93
|
|
#define SIG3 0x08
|
|
#define PAGE_SIZE 0x20U //32 words
|
|
#endif
|
|
|
|
|
|
/* 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 address_high;
|
|
|
|
|
|
uint8_t i;
|
|
uint8_t bootuart = 0;
|
|
|
|
uint8_t error_count = 0;
|
|
|
|
void (*app_start)(void) = 0x0000;
|
|
|
|
|
|
/* main program starts here */
|
|
int main(void)
|
|
{
|
|
uint8_t ch,ch2;
|
|
uint16_t w;
|
|
#ifdef WATCHDOG_MODS
|
|
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 its a not an external reset...
|
|
app_start(); // skip bootloader
|
|
#else
|
|
asm volatile("nop\n\t");
|
|
#endif
|
|
/* set pin direction for bootloader pin and enable pullup */
|
|
/* for ATmega128, two pins need to be initialized */
|
|
#ifdef __AVR_ATmega128__
|
|
BL_DDR &= ~_BV(BL0);
|
|
BL_DDR &= ~_BV(BL1);
|
|
BL_PORT |= _BV(BL0);
|
|
BL_PORT |= _BV(BL1);
|
|
#else
|
|
/* We run the bootloader regardless of the state of this pin. Thus, don't
|
|
put it in a different state than the other pins. --DAM, 070709
|
|
This also applies to Arduino Mega -- DC, 080930
|
|
BL_DDR &= ~_BV(BL);
|
|
BL_PORT |= _BV(BL);
|
|
*/
|
|
#endif
|
|
#ifdef __AVR_ATmega128__
|
|
/* check which UART should be used for booting */
|
|
if(bit_is_clear(BL_PIN, BL0))
|
|
{
|
|
bootuart = 1;
|
|
}
|
|
else if(bit_is_clear(BL_PIN, BL1))
|
|
{
|
|
bootuart = 2;
|
|
}
|
|
#endif
|
|
#if defined __AVR_ATmega1280__ || defined __AVR_ATmega1284P__
|
|
/* the mega1280 chip has four serial ports ... we could eventually use any of them, or not? */
|
|
/* however, we don't wanna confuse people, to avoid making a mess, we will stick to RXD0, TXD0 */
|
|
bootuart = 1;
|
|
#endif
|
|
/* check if flash is programmed already, if not start bootloader anyway */
|
|
if(pgm_read_byte_near(0x0000) != 0xFF)
|
|
{
|
|
#ifdef __AVR_ATmega128__
|
|
/* no UART was selected, start application */
|
|
if(!bootuart)
|
|
{
|
|
app_start();
|
|
}
|
|
#else
|
|
/* check if bootloader pin is set low */
|
|
/* we don't start this part neither for the m8, nor m168 */
|
|
//if(bit_is_set(BL_PIN, BL)) {
|
|
// app_start();
|
|
// }
|
|
#endif
|
|
}
|
|
#ifdef __AVR_ATmega128__
|
|
/* no bootuart was selected, default to uart 0 */
|
|
if(!bootuart)
|
|
{
|
|
bootuart = 1;
|
|
}
|
|
#endif
|
|
/* initialize UART(s) depending on CPU defined */
|
|
#if defined(__AVR_ATmega128__) || defined(__AVR_ATmega1280__) || defined(__AVR_ATmega1284P__)
|
|
if(bootuart == 1)
|
|
{
|
|
UBRR0L = (uint8_t)(F_CPU/(BAUD_RATE*16L)-1);
|
|
UBRR0H = (F_CPU/(BAUD_RATE*16L)-1) >> 8;
|
|
UCSR0A = 0x00;
|
|
UCSR0C = 0x06;
|
|
UCSR0B = _BV(TXEN0)|_BV(RXEN0);
|
|
}
|
|
if(bootuart == 2)
|
|
{
|
|
UBRR1L = (uint8_t)(F_CPU/(BAUD_RATE*16L)-1);
|
|
UBRR1H = (F_CPU/(BAUD_RATE*16L)-1) >> 8;
|
|
UCSR1A = 0x00;
|
|
UCSR1C = 0x06;
|
|
UCSR1B = _BV(TXEN1)|_BV(RXEN1);
|
|
}
|
|
#elif defined __AVR_ATmega163__
|
|
UBRR = (uint8_t)(F_CPU/(BAUD_RATE*16L)-1);
|
|
UBRRHI = (F_CPU/(BAUD_RATE*16L)-1) >> 8;
|
|
UCSRA = 0x00;
|
|
UCSRB = _BV(TXEN)|_BV(RXEN);
|
|
#elif defined(__AVR_ATmega168__) || defined(__AVR_ATmega328P__)
|
|
#ifdef DOUBLE_SPEED
|
|
UCSR0A = (1<<U2X0); //Double speed mode USART0
|
|
UBRR0L = (uint8_t)(F_CPU/(BAUD_RATE*8L)-1);
|
|
UBRR0H = (F_CPU/(BAUD_RATE*8L)-1) >> 8;
|
|
#else
|
|
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__)
|
|
// 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__)
|
|
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__
|
|
: "=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__)
|
|
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__)
|
|
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__)
|
|
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__)
|
|
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 */
|