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avrdude/avr910.c

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/*
* avrdude - A Downloader/Uploader for AVR device programmers
* Copyright (C) 2003 Theodore A. Roth <troth@openavr.org>
*
* 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
*/
/* $Id$ */
/*
* avrdude interface for Atmel Low Cost Serial programmers which adher to the
* protocol described in application note avr910.
*/
#include "ac_cfg.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "avr.h"
#include "pgm.h"
#include "avr910.h"
#include "serial.h"
extern char * progname;
extern int do_cycles;
/* These two defines are only for debugging. Will remove them once it starts
working. */
#define show_func_info() \
fprintf(stderr, "%s: line %d: called %s()\n", \
__FILE__, __LINE__, __FUNCTION__)
#define no_show_func_info()
static int avr910_send(PROGRAMMER * pgm, char * buf, size_t len)
{
no_show_func_info();
return serial_send(pgm->fd, buf, len);
}
static int avr910_recv(PROGRAMMER * pgm, char * buf, size_t len)
{
no_show_func_info();
return serial_recv(pgm->fd, buf, len);
}
static int avr910_drain(PROGRAMMER * pgm, int display)
{
no_show_func_info();
return serial_drain(pgm->fd, display);
}
static void avr910_vfy_cmd_sent(PROGRAMMER * pgm, char * errmsg)
{
char c;
avr910_recv(pgm, &c, 1);
if (c != '\r') {
fprintf(stderr, "%s: error: programmer did not respond to command: %s\n",
progname, errmsg);
exit(1);
}
}
static int avr910_rdy_led(PROGRAMMER * pgm, int value)
{
no_show_func_info();
/* Do nothing. */
return 0;
}
static int avr910_err_led(PROGRAMMER * pgm, int value)
{
no_show_func_info();
/* Do nothing. */
return 0;
}
static int avr910_pgm_led(PROGRAMMER * pgm, int value)
{
no_show_func_info();
/* Do nothing. */
return 0;
}
static int avr910_vfy_led(PROGRAMMER * pgm, int value)
{
no_show_func_info();
/* Do nothing. */
return 0;
}
/*
* issue the 'chip erase' command to the AVR device
*/
static int avr910_chip_erase(PROGRAMMER * pgm, AVRPART * p)
{
no_show_func_info();
avr910_send(pgm, "e", 1);
avr910_vfy_cmd_sent(pgm, "chip erase");
return 0;
}
static void avr910_enter_prog_mode(PROGRAMMER * pgm)
{
avr910_send(pgm, "P", 1);
avr910_vfy_cmd_sent(pgm, "enter prog mode");
}
static void avr910_leave_prog_mode(PROGRAMMER * pgm)
{
avr910_send(pgm, "L", 1);
avr910_vfy_cmd_sent(pgm, "leave prog mode");
}
/*
* issue the 'program enable' command to the AVR device
*/
static int avr910_program_enable(PROGRAMMER * pgm, AVRPART * p)
{
no_show_func_info();
return -1;
}
/*
* apply power to the AVR processor
*/
static void avr910_powerup(PROGRAMMER * pgm)
{
no_show_func_info();
/* Do nothing. */
return;
}
/*
* remove power from the AVR processor
*/
static void avr910_powerdown(PROGRAMMER * pgm)
{
no_show_func_info();
/* Do nothing. */
return;
}
/*
* initialize the AVR device and prepare it to accept commands
*/
static int avr910_initialize(PROGRAMMER * pgm, AVRPART * p)
{
char id[8];
char sw[2];
char hw[2];
char buf[10];
char type;
unsigned char c;
int dev_supported = 0;
no_show_func_info();
/* Get the programmer identifier. Programmer returns exactly 7 chars
_without_ the null.*/
avr910_send(pgm, "S", 1);
memset (id, 0, sizeof(id));
avr910_recv(pgm, id, sizeof(id)-1);
/* Get the HW and SW versions to see if the programmer is present. */
avr910_send(pgm, "V", 1);
avr910_recv(pgm, sw, sizeof(sw));
avr910_send(pgm, "v", 1);
avr910_recv(pgm, hw, sizeof(hw));
/* Get the programmer type (serial or parallel). Expect serial. */
avr910_send(pgm, "p", 1);
avr910_recv(pgm, &type, 1);
fprintf(stderr, "Found programmer: Id = \"%s\"; type = %c\n", id, type);
fprintf(stderr, " Software Version = %c.%c; "
"Hardware Version = %c.%c\n", sw[0], sw[1], hw[0], hw[1]);
/* Get list of devices that the programmer supports. */
avr910_send(pgm, "t", 1);
fprintf(stderr, "\nProgrammer supports the following devices:\n");
while (1) {
avr910_recv(pgm, &c, 1);
if (c == 0)
break;
fprintf(stderr, " Device code: 0x%02x\n", c);
/* FIXME: Need to lookup devcode and report the device. */
if (p->avr910_devcode == c)
dev_supported = 1;
};
fprintf(stderr,"\n");
if (!dev_supported) {
fprintf(stderr,
"%s: error: selected device is not supported by programmer: %s\n",
progname, p->id);
exit(1);
}
/* Tell the programmer which part we selected. */
buf[0] = 'T';
buf[1] = p->avr910_devcode;
avr910_send(pgm, buf, 2);
avr910_vfy_cmd_sent(pgm, "select device");
avr910_enter_prog_mode(pgm);
return 0;
}
static int avr910_save(PROGRAMMER * pgm)
{
no_show_func_info();
/* Do nothing. */
return 0;
}
static void avr910_restore(PROGRAMMER * pgm)
{
no_show_func_info();
/* Do nothing. */
return;
}
static void avr910_disable(PROGRAMMER * pgm)
{
no_show_func_info();
/* Do nothing. */
return;
}
static void avr910_enable(PROGRAMMER * pgm)
{
no_show_func_info();
/* Do nothing. */
return;
}
/*
* transmit an AVR device command and return the results; 'cmd' and
* 'res' must point to at least a 4 byte data buffer
*/
static int avr910_cmd(PROGRAMMER * pgm, unsigned char cmd[4],
unsigned char res[4])
{
int i;
no_show_func_info();
for (i=0; i<4; i++) {
fprintf(stderr, "cmd[%d] = 0x%02x\n", i, cmd[i]);
}
return 0;
}
static void avr910_open(PROGRAMMER * pgm, char * port)
{
no_show_func_info();
strcpy(pgm->port, port);
pgm->fd = serial_open(port, 19200);
/*
* drain any extraneous input
*/
avr910_drain (pgm, 0);
}
static void avr910_close(PROGRAMMER * pgm)
{
no_show_func_info();
avr910_leave_prog_mode(pgm);
serial_close(pgm->fd);
pgm->fd = -1;
}
static void avr910_display(PROGRAMMER * pgm, char * p)
{
no_show_func_info();
return;
}
static void avr910_set_addr(PROGRAMMER * pgm, unsigned long addr)
{
unsigned char cmd[3];
cmd[0] = 'A';
cmd[1] = (addr >> 8) & 0xff;
cmd[2] = addr & 0xff;
avr910_send(pgm, cmd, sizeof(cmd));
avr910_vfy_cmd_sent(pgm, "set addr");
}
/*
* For some reason, if we don't do this when writing to flash, the first byte
* of flash is not programmed. I susect that the board got out of sync after
* the erase and sending another command gets us back in sync. -TRoth
*/
static void avr910_write_setup(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m)
{
if (strcmp(m->desc, "flash") == 0) {
avr910_send(pgm, "y", 1);
avr910_vfy_cmd_sent(pgm, "clear LED");
}
}
static int avr910_write_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
unsigned long addr, unsigned char value)
{
unsigned char cmd[2];
no_show_func_info();
if (strcmp(m->desc, "flash") == 0) {
if (addr & 0x01) {
cmd[0] = 'C'; /* Write Program Mem high byte */
}
else {
cmd[0] = 'c';
}
addr >>= 1;
}
else if (strcmp(m->desc, "eeprom") == 0) {
cmd[0] = 'D';
}
else {
return -1;
}
cmd[1] = value;
avr910_set_addr(pgm, addr);
avr910_send(pgm, cmd, sizeof(cmd));
avr910_vfy_cmd_sent(pgm, "write byte");
return 0;
}
static int avr910_read_byte_flash(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
unsigned long addr, unsigned char * value)
{
static int cached = 0;
static unsigned char cvalue;
static unsigned long caddr;
if (cached && ((caddr + 1) == addr)) {
*value = cvalue;
cached = 0;
}
else {
unsigned char buf[2];
avr910_set_addr(pgm, addr >> 1);
avr910_send(pgm, "R", 1);
/* Read back the program mem word (MSB first) */
avr910_recv(pgm, buf, sizeof(buf));
if ((addr & 0x01) == 0) {
*value = buf[1];
cached = 1;
cvalue = buf[0];
caddr = addr;
}
else {
*value = buf[0];
}
}
return 0;
}
static int avr910_read_byte_eeprom(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
unsigned long addr, unsigned char * value)
{
avr910_set_addr(pgm, addr);
avr910_send(pgm, "d", 1);
avr910_recv(pgm, value, 1);
return 0;
}
static int avr910_read_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
unsigned long addr, unsigned char * value)
{
no_show_func_info();
if (strcmp(m->desc, "flash") == 0) {
return avr910_read_byte_flash(pgm, p, m, addr, value);
}
if (strcmp(m->desc, "eeprom") == 0) {
return avr910_read_byte_eeprom(pgm, p, m, addr, value);
}
return -1;
}
/* Signature byte reads are always 3 bytes. */
static int avr910_read_sig_bytes(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m)
{
no_show_func_info();
if (m->size < 3) {
fprintf(stderr, "%s: memsize too small for sig byte read", progname);
return -1;
}
avr910_send(pgm, "s", 1);
avr910_recv(pgm, m->buf, 3);
return 3;
}
void avr910_initpgm(PROGRAMMER * pgm)
{
no_show_func_info();
strcpy(pgm->type, "avr910");
/*
* mandatory functions
*/
pgm->rdy_led = avr910_rdy_led;
pgm->err_led = avr910_err_led;
pgm->pgm_led = avr910_pgm_led;
pgm->vfy_led = avr910_vfy_led;
pgm->initialize = avr910_initialize;
pgm->display = avr910_display;
pgm->save = avr910_save;
pgm->restore = avr910_restore;
pgm->enable = avr910_enable;
pgm->disable = avr910_disable;
pgm->powerup = avr910_powerup;
pgm->powerdown = avr910_powerdown;
pgm->program_enable = avr910_program_enable;
pgm->chip_erase = avr910_chip_erase;
pgm->cmd = avr910_cmd;
pgm->open = avr910_open;
pgm->close = avr910_close;
/*
* optional functions
*/
pgm->write_setup = avr910_write_setup;
pgm->write_byte = avr910_write_byte;
pgm->read_byte = avr910_read_byte;
pgm->read_sig_bytes = avr910_read_sig_bytes;
}
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