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ArduinoISP.ino
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ArduinoISP.ino
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// ArduinoISP version 04m3
// Copyright (c) 2008-2011 Randall Bohn
// If you require a license, see
// http://www.opensource.org/licenses/bsd-license.php
//
// This sketch turns the Arduino into a AVRISP
// using the following arduino pins:
//
// pin name: not-mega: mega(1280 and 2560)
// slave reset: 10: 53
// MOSI: 11: 51
// MISO: 12: 50
// SCK: 13: (std LED) 52
//
// Put an LED (with resistor) on the following pins:
// 9: Heartbeat - shows the programmer is running
// 8: Error - Lights up if something goes wrong (use red if that makes sense)
// 7: Programming - In communication with the slave
//
// 23 July 2011 Randall Bohn
// -Address Arduino issue 509 :: Portability of ArduinoISP
// http://code.google.com/p/arduino/issues/detail?id=509
//
// October 2010 by Randall Bohn
// - Write to EEPROM > 256 bytes
// - Better use of LEDs:
// -- Flash LED_PMODE on each flash commit
// -- Flash LED_PMODE while writing EEPROM (both give visual feedback of writing progress)
// -- Light LED_ERR whenever we hit a STK_NOSYNC. Turn it off when back in sync.
// - Use pins_arduino.h (should also work on Arduino Mega)
//
// October 2009 by David A. Mellis
// - Added support for the read signature command
//
// February 2009 by Randall Bohn
// - Added support for writing to EEPROM (what took so long?)
// Windows users should consider WinAVR's avrdude instead of the
// avrdude included with Arduino software.
//
// January 2008 by Randall Bohn
// - Thanks to Amplificar for helping me with the STK500 protocol
// - The AVRISP/STK500 (mk I) protocol is used in the arduino bootloader
// - The SPI functions herein were developed for the AVR910_ARD programmer
// - More information at http://code.google.com/p/mega-isp
// versions need to be above Atmel programmer to avoid fw update attempts
#define HWVER 2
#define SWMAJ 1
#define SWMIN 18
#define BAUDRATE 19200
//#define BAUDRATE 38400
//#define BAUDRATE 115200
// create clock on digital 9 using pwm (timer1), LED_HB must move
//#define LADYADA_CLOCK
#define RESETDELAY 0
// uncomment if you want to have debug traces
// (needs a separate uart so works only on Sanguino, Leonardo, Due...)
//#define TRACES
// following settings have different defaults on SAM vs. AVR
#ifdef __SAM3X8E__
// Select uart to use for programming and debugging:
#define SERIAL_PRG SerialUSB
#define SERIAL_DBG Serial
// comment USE_HARDWARE_SPI to use bitbang spi
// use bitbang to make it work with very slow attiny2313
// #define USE_HARDWARE_SPI
#else
// Select uart to use for programming and debugging:
#define SERIAL_PRG Serial
#define SERIAL_DBG Serial1
// comment USE_HARDWARE_SPI to use bitbang spi
// use bitbang to make it work with very slow attiny2313
#define USE_HARDWARE_SPI
#endif
///////////////////////////////////////////////
// ideally won't need to edit below here //
///////////////////////////////////////////////
#ifdef USE_HARDWARE_SPI
#include "SPI.h"
#ifdef __AVR__ // this would better go into SPI lib
#define SPI_CLOCK_DIV_MAX SPI_CLOCK_DIV128
#else
#define SPI_CLOCK_DIV_MAX 255
#endif
#endif
#include "pins_arduino.h"
#define PIN_RESET SS
#define PIN_SCK SCK
#define PIN_MOSI MOSI
#define PIN_MISO MISO
#define LED_HB 9
#define LED_ERR 8
#define LED_PMODE 7
#define PROG_FLICKER true
#ifdef LADYADA_CLOCK
#ifndef __AVR__
#error "Not yet implemented for non AVR's."
#endif
// needs timer1 PWM
#define CLOCK_PIN 9
#undef LED_HB
#define LED_HB 6
#endif
#ifdef TRACES
#define TRACE_BEGIN(baud) SERIAL_DBG.begin(baud)
#define TRACE(x) SERIAL_DBG.print(x)
#define TRACELN(x) SERIAL_DBG.println(x)
#define TRACE2(x, format) SERIAL_DBG.print(x, format)
#define TRACE2LN(x, format) SERIAL_DBG.println(x, format)
#else
#define TRACE_BEGIN(baud)
#define TRACE(x)
#define TRACELN(x)
#define TRACE2(x, format)
#define TRACE2LN(x, format)
#endif
// STK Definitions
#define STK_OK 0x10
#define STK_FAILED 0x11
#define STK_UNKNOWN 0x12
#define STK_INSYNC 0x14
#define STK_NOSYNC 0x15
#define CRC_EOP 0x20 //ok it is a space...
void pulse(uint8_t pin, uint8_t times);
#ifndef USE_HARDWARE_SPI
class BitBangedSPI {
public:
void begin() {
pinMode(PIN_MISO, INPUT);
pinMode(PIN_RESET, OUTPUT);
pinMode(PIN_SCK, OUTPUT);
pinMode(PIN_MOSI, OUTPUT);
}
void end() {}
uint8_t transfer (uint8_t b) {
for (unsigned int i = 0; i < 8; ++i) {
digitalWrite(PIN_MOSI, b & 0x80);
digitalWrite(PIN_SCK, HIGH);
b = (b << 1) | digitalRead(PIN_MISO);
digitalWrite(PIN_SCK, LOW); // slow pulse
}
return b;
}
};
static BitBangedSPI SPI;
#endif
void setup(void) {
SERIAL_PRG.begin(BAUDRATE);
#ifdef USE_HARDWARE_SPI
SPI.setDataMode(0);
SPI.setBitOrder(MSBFIRST);
// Clock Div can be 2,4,8,16,32,64, or 128
SPI.setClockDivider(SPI_CLOCK_DIV_MAX);
#endif
pinMode(LED_PMODE, OUTPUT);
pulse(LED_PMODE, 2);
pinMode(LED_ERR, OUTPUT);
pulse(LED_ERR, 2);
pinMode(LED_HB, OUTPUT);
pulse(LED_HB, 2);
#ifdef LADYADA_CLOCK
// setup high freq PWM (timer 1)
pinMode(CLOCK_PIN, OUTPUT);
uint8_t sreg = SREG;
cli(); // disable interrupts to access TCNT1, OCR1A,B
// 50% duty cycle -> 8 MHz
OCR1A = 0;
ICR1 = 1;
// OC1A output, fast PWM
TCCR1A = _BV(WGM11) | _BV(COM1A1);
TCCR1B = _BV(WGM13) | _BV(WGM12) | _BV(CS10); // no clock prescale
SREG = sreg; // restore interrupts
#endif
TRACE_BEGIN(115200);
TRACELN("*** setup ***");
}
uint8_t error=0;
uint8_t pmode=0;
uint8_t buff[256]; // global block storage
// address for reading and writing, set by 'U' command
uint16_t here;
// get multi-byte Big Endian values
#define beget16(addr) ((uint16_t)*(addr) << 8 | (uint16_t)*((addr)+1) )
#define beget32(a) ((uint32_t)beget16(a) << 16 | (uint32_t)beget16((a)+2) )
struct param {
uint8_t devicecode;
uint8_t revision;
uint8_t progtype;
uint8_t parmode;
uint8_t polling;
uint8_t selftimed;
uint8_t lockbytes;
uint8_t fusebytes;
uint8_t flashpoll;
//uint8_t ignored;
uint16_t eeprompoll;
uint16_t pagesize;
uint16_t eepromsize;
uint32_t flashsize;
} param;
// this provides a heartbeat, so you can tell the software is running.
uint8_t hbval=128;
int8_t hbdelta=8;
unsigned long hbprev=0;
void heartbeat(void) {
if (hbval > 192 || hbval < 32) hbdelta = -hbdelta;
hbval += hbdelta;
while (millis()-hbprev < 40); // wait a bit if came back too soon
analogWrite(LED_HB, hbval);
hbprev=millis();
}
void loop(void) {
// is pmode active?
if (pmode) digitalWrite(LED_PMODE, HIGH);
else digitalWrite(LED_PMODE, LOW);
// is there an error?
if (error) digitalWrite(LED_ERR, HIGH);
else digitalWrite(LED_ERR, LOW);
// light the heartbeat LED
heartbeat();
if (SERIAL_PRG.available()) {
avrisp();
}
}
uint8_t getch(void) {
while(!SERIAL_PRG.available());
return SERIAL_PRG.read();
}
void fill(unsigned n) {
for (unsigned x = 0; x < n; x++) {
buff[x] = getch();
}
}
#define PTIME 30
void pulse(uint8_t pin, uint8_t times) {
do {
digitalWrite(pin, HIGH);
delay(PTIME);
digitalWrite(pin, LOW);
delay(PTIME);
}
while (times--);
}
void prog_lamp(uint8_t state) {
if (PROG_FLICKER)
digitalWrite(LED_PMODE, state);
}
uint8_t spi_transaction(uint8_t a, uint8_t b, uint8_t c, uint8_t d) {
SPI.transfer(a);
SPI.transfer(b);
SPI.transfer(c);
return SPI.transfer(d);
}
void empty_reply(void) {
if (CRC_EOP == getch()) {
SERIAL_PRG.print((char)STK_INSYNC);
SERIAL_PRG.print((char)STK_OK);
}
else {
error++;
SERIAL_PRG.print((char)STK_NOSYNC);
}
}
void breply(uint8_t b) {
if (CRC_EOP == getch()) {
SERIAL_PRG.print((char)STK_INSYNC);
SERIAL_PRG.print((char)b);
SERIAL_PRG.print((char)STK_OK);
}
else {
error++;
SERIAL_PRG.print((char)STK_NOSYNC);
}
}
void get_version(uint8_t c) {
switch(c) {
case 0x80:
breply(HWVER);
break;
case 0x81:
breply(SWMAJ);
break;
case 0x82:
breply(SWMIN);
break;
case 0x93:
breply('S'); // serial programmer
break;
default:
breply(0);
}
}
void set_parameters(void) {
// call this after reading paramter packet into buff[]
param.devicecode = buff[0];
param.revision = buff[1];
param.progtype = buff[2];
param.parmode = buff[3];
param.polling = buff[4];
param.selftimed = buff[5];
param.lockbytes = buff[6];
param.fusebytes = buff[7];
param.flashpoll = buff[8];
// ignore buff[9] (= buff[8])
// following are 16 bits (big endian)
param.eeprompoll = beget16(&buff[10]);
param.pagesize = beget16(&buff[12]);
param.eepromsize = beget16(&buff[14]);
// 32 bits flashsize (big endian)
param.flashsize = beget32(&buff[16]);
}
void start_pmode(void) {
pmode = 1;
// reset target before driving SCK or MOSI
digitalWrite(PIN_RESET, LOW);
digitalWrite(PIN_SCK, LOW);
digitalWrite(PIN_MOSI, HIGH);
pinMode(PIN_MISO, INPUT);
pinMode(PIN_RESET, OUTPUT); // PIN_RESET not always SS: Leonardo, Due...
SPI.begin(); // now SS, MOSI and SCK are output
// See datasheets: "SERIAL_PRG Programming Algorithm":
delay(5); // choosen arbitrarilly
// pulse RESET high after SCK is low
digitalWrite(PIN_RESET, HIGH);
delay(1); // must be minimum 2 CPU clock cycles
digitalWrite(PIN_RESET, LOW);
delay(50); // minimum 20 ms
if (RESETDELAY) delay(RESETDELAY);
spi_transaction(0xAC, 0x53, 0x00, 0x00);
}
void end_pmode(void) {
SPI.end();
pinMode(PIN_MOSI, INPUT);
pinMode(PIN_SCK, INPUT);
pinMode(PIN_RESET, INPUT);
pmode = 0;
}
void universal(void) {
uint8_t ch;
fill(4);
ch = spi_transaction(buff[0], buff[1], buff[2], buff[3]);
breply(ch);
}
#define flash_write_cmd(hilo, addr, data) \
spi_transaction(0x40|((hilo)<<3), (addr)>>8 & 0xFF, (addr) & 0xFF, (data))
#define flash_read_cmd(hilo, addr) \
spi_transaction(0x20|((hilo)<<3), (addr)>>8 & 0xFF, (addr) & 0xFF, 0)
void commit(uint16_t addr) {
if (PROG_FLICKER) prog_lamp(LOW);
spi_transaction(0x4C, (addr >> 8) & 0xFF, addr & 0xFF, 0);
if (PROG_FLICKER) {
delay(PTIME);
prog_lamp(HIGH);
}
}
uint16_t current_page(uint16_t addr) {
if (param.pagesize == 32) return here & 0xFFF0;
if (param.pagesize == 64) return here & 0xFFE0;
if (param.pagesize == 128) return here & 0xFFC0;
if (param.pagesize == 256) return here & 0xFF80;
return here;
}
void write_flash(unsigned length) {
fill(length);
if (CRC_EOP == getch()) {
SERIAL_PRG.print((char) STK_INSYNC);
SERIAL_PRG.print((char) write_flash_pages(length));
}
else {
error++;
SERIAL_PRG.print((char) STK_NOSYNC);
}
}
uint8_t write_flash_pages(unsigned length) {
unsigned x = 0;
uint16_t page = current_page(here);
while (x < length) {
if (page != current_page(here)) {
commit(page);
page = current_page(here);
}
flash_write_cmd(LOW, here, buff[x++]);
flash_write_cmd(HIGH, here, buff[x++]);
here++;
}
commit(page);
return STK_OK;
}
#define EECHUNK (32)
uint8_t write_eeprom(unsigned length) {
// here is a word address, get the byte address
uint16_t start = here << 1;
if (length > param.eepromsize) {
error++;
return STK_FAILED;
}
while (length > EECHUNK) {
write_eeprom_chunk(start, EECHUNK);
start += EECHUNK;
length -= EECHUNK;
}
write_eeprom_chunk(start, length);
return STK_OK;
}
// write (length) bytes, (start) is a byte address
uint8_t write_eeprom_chunk(uint16_t addr, unsigned length) {
// this writes byte-by-byte,
// page writing may be faster (4 bytes at a time)
fill(length);
prog_lamp(LOW);
for (unsigned x = 0; x < length; x++, addr++) {
spi_transaction(0xC0, (addr>>8) & 0xFF, addr & 0xFF, buff[x]);
delay(45);
}
prog_lamp(HIGH);
return STK_OK;
}
void program_page(void) {
char result = (char) STK_FAILED;
unsigned length = getch()<<8;
length |= getch();
char memtype = getch();
// flash memory @here, (length) bytes
if (memtype == 'F') {
write_flash(length);
return;
}
if (memtype == 'E') {
result = (char)write_eeprom(length);
if (CRC_EOP == getch()) {
SERIAL_PRG.print((char) STK_INSYNC);
SERIAL_PRG.print(result);
}
else {
error++;
SERIAL_PRG.print((char) STK_NOSYNC);
}
return;
}
SERIAL_PRG.print((char)STK_FAILED);
}
char flash_read_page(unsigned length) {
for (unsigned x = 0; x < length; x+=2) {
char ch;
ch = flash_read_cmd(LOW, here);
SERIAL_PRG.print(ch);
ch = flash_read_cmd(HIGH, here);
SERIAL_PRG.print(ch);
here++;
}
return STK_OK;
}
char eeprom_read_page(unsigned length) {
// here again we have a word address
uint16_t addr = here << 1;
for (unsigned x = 0; x < length; x++, addr++) {
uint8_t ee = spi_transaction(0xA0, (addr >> 8) & 0xFF, addr & 0xFF, 0xFF);
SERIAL_PRG.print((char) ee);
}
return STK_OK;
}
void read_page(void) {
char result = (char)STK_FAILED;
unsigned length = getch() << 8;
length |= getch();
char memtype = getch();
if (CRC_EOP != getch()) {
error++;
SERIAL_PRG.print((char) STK_NOSYNC);
return;
}
SERIAL_PRG.print((char) STK_INSYNC);
if (memtype == 'F') result = flash_read_page(length);
if (memtype == 'E') result = eeprom_read_page(length);
SERIAL_PRG.print(result);
}
void read_signature(void) {
if (CRC_EOP != getch()) {
error++;
SERIAL_PRG.print((char) STK_NOSYNC);
return;
}
SERIAL_PRG.print((char) STK_INSYNC);
char ch;
ch = spi_transaction(0x30, 0x00, 0x00, 0x00);
SERIAL_PRG.print(ch);
ch = spi_transaction(0x30, 0x00, 0x01, 0x00);
SERIAL_PRG.print(ch);
ch = spi_transaction(0x30, 0x00, 0x02, 0x00);
SERIAL_PRG.print(ch);
SERIAL_PRG.print((char) STK_OK);
}
//////////////////////////////////////////
//////////////////////////////////////////
////////////////////////////////////
////////////////////////////////////
void avrisp(void) {
uint8_t data, low, high;
uint8_t ch = getch();
TRACE("> ");
TRACELN((char) ch);
switch (ch) {
case '0': // signon
error = 0;
empty_reply();
break;
case '1':
if (getch() == CRC_EOP) {
SERIAL_PRG.print((char) STK_INSYNC);
SERIAL_PRG.print("AVR ISP");
SERIAL_PRG.print((char) STK_OK);
} else {
error++;
SERIAL_PRG.print((char) STK_NOSYNC);
}
break;
case 'A':
get_version(getch());
break;
case 'B':
fill(20);
set_parameters();
empty_reply();
break;
case 'E': // extended parameters - ignore for now
fill(5);
empty_reply();
break;
case 'P':
if (pmode) {
pulse(LED_ERR, 3);
} else {
start_pmode();
}
empty_reply();
break;
case 'U': // set address (word)
here = getch();
here |= getch()<<8;
empty_reply();
break;
case 0x60: //STK_PROG_FLASH
low = getch();
high = getch();
empty_reply();
break;
case 0x61: //STK_PROG_DATA
data = getch();
empty_reply();
break;
case 0x64: //STK_PROG_PAGE
program_page();
break;
case 0x74: //STK_READ_PAGE 't'
read_page();
break;
case 'V': //0x56
universal();
break;
case 'Q': //0x51
error=0;
end_pmode();
empty_reply();
break;
case 0x75: //STK_READ_SIGN 'u'
read_signature();
break;
// expecting a command, not CRC_EOP
// this is how we can get back in sync
case CRC_EOP:
error++;
SERIAL_PRG.print((char) STK_NOSYNC);
break;
// anything else we will return STK_UNKNOWN
default:
error++;
if (CRC_EOP == getch())
SERIAL_PRG.print((char)STK_UNKNOWN);
else
SERIAL_PRG.print((char)STK_NOSYNC);
}
}