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avrdude/avrdude/stk500.c

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/*
* avrdude - A Downloader/Uploader for AVR device programmers
* Copyright (C) 2002, 2003 Brian S. Dean <bsd@bsdhome.com>
*
* 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 STK500 programmer
*
* Note: most commands use the "universal command" feature of the
* programmer in a "pass through" mode, exceptions are "program
* enable", "paged read", and "paged write".
*
*/
#include "ac_cfg.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "avr.h"
#include "pgm.h"
#include "stk500_private.h"
#include "serial.h"
extern int verbose;
extern char * progname;
extern int do_cycles;
static int stk500_getparm(PROGRAMMER * pgm, unsigned parm, unsigned * value);
static int stk500_setparm(PROGRAMMER * pgm, unsigned parm, unsigned value);
static void stk500_print_parms1(PROGRAMMER * pgm, char * p);
static int stk500_send(PROGRAMMER * pgm, char * buf, size_t len)
{
return serial_send(pgm->fd, buf, len);
}
static int stk500_recv(PROGRAMMER * pgm, char * buf, size_t len)
{
return serial_recv(pgm->fd, buf, len);
}
static int stk500_drain(PROGRAMMER * pgm, int display)
{
return serial_drain(pgm->fd, display);
}
static int stk500_getsync(PROGRAMMER * pgm)
{
unsigned char buf[32], resp[32];
/*
* get in sync */
buf[0] = Cmnd_STK_GET_SYNC;
buf[1] = Sync_CRC_EOP;
stk500_send(pgm, buf, 2);
stk500_recv(pgm, resp, 1);
if (resp[0] != Resp_STK_INSYNC) {
fprintf(stderr,
"%s: stk500_getsync(): not in sync: resp=0x%02x\n",
progname, resp[0]);
stk500_drain(pgm, 0);
exit(1);
}
stk500_recv(pgm, resp, 1);
if (resp[0] != Resp_STK_OK) {
fprintf(stderr,
"%s: stk500_getsync(): can't communicate with device: "
"resp=0x%02x\n",
progname, resp[0]);
exit(1);
}
return 0;
}
static int stk500_rdy_led(PROGRAMMER * pgm, int value)
{
return 0;
}
static int stk500_err_led(PROGRAMMER * pgm, int value)
{
return 0;
}
static int stk500_pgm_led(PROGRAMMER * pgm, int value)
{
return 0;
}
static int stk500_vfy_led(PROGRAMMER * pgm, int value)
{
return 0;
}
/*
* transmit an AVR device command and return the results; 'cmd' and
* 'res' must point to at least a 4 byte data buffer
*/
static int stk500_cmd(PROGRAMMER * pgm, unsigned char cmd[4],
unsigned char res[4])
{
unsigned char buf[32];
buf[0] = Cmnd_STK_UNIVERSAL;
buf[1] = cmd[0];
buf[2] = cmd[1];
buf[3] = cmd[2];
buf[4] = cmd[3];
buf[5] = Sync_CRC_EOP;
stk500_send(pgm, buf, 6);
stk500_recv(pgm, buf, 1);
if (buf[0] != Resp_STK_INSYNC) {
fprintf(stderr, "%s: stk500_cmd(): programmer is out of sync\n", progname);
exit(1);
}
res[0] = cmd[1];
res[1] = cmd[2];
res[2] = cmd[3];
stk500_recv(pgm, &res[3], 1);
stk500_recv(pgm, buf, 1);
if (buf[0] != Resp_STK_OK) {
fprintf(stderr, "%s: stk500_cmd(): protocol error\n", progname);
exit(1);
}
return 0;
}
/*
* issue the 'chip erase' command to the AVR device
*/
static int stk500_chip_erase(PROGRAMMER * pgm, AVRPART * p)
{
unsigned char cmd[4];
unsigned char res[4];
int cycles;
int rc;
if (p->op[AVR_OP_CHIP_ERASE] == NULL) {
fprintf(stderr, "chip erase instruction not defined for part \"%s\"\n",
p->desc);
return -1;
}
rc = avr_get_cycle_count(pgm, p, &cycles);
/*
* only print out the current cycle count if we aren't going to
* display it below
*/
if (!do_cycles && ((rc >= 0) && (cycles != 0xffffffff))) {
fprintf(stderr,
"%s: current erase-rewrite cycle count is %d%s\n",
progname, cycles,
do_cycles ? "" : " (if being tracked)");
}
pgm->pgm_led(pgm, ON);
memset(cmd, 0, sizeof(cmd));
avr_set_bits(p->op[AVR_OP_CHIP_ERASE], cmd);
pgm->cmd(pgm, cmd, res);
usleep(p->chip_erase_delay);
pgm->initialize(pgm, p);
pgm->pgm_led(pgm, OFF);
if (do_cycles && (cycles != -1)) {
if (cycles == 0x00ffff) {
cycles = 0;
}
cycles++;
fprintf(stderr, "%s: erase-rewrite cycle count is now %d\n",
progname, cycles);
avr_put_cycle_count(pgm, p, cycles);
}
return 0;
}
/*
* issue the 'program enable' command to the AVR device
*/
static int stk500_program_enable(PROGRAMMER * pgm, AVRPART * p)
{
unsigned char buf[16];
int tries=0;
retry:
tries++;
buf[0] = Cmnd_STK_ENTER_PROGMODE;
buf[1] = Sync_CRC_EOP;
stk500_send(pgm, buf, 2);
stk500_recv(pgm, buf, 1);
if (buf[0] == Resp_STK_NOSYNC) {
if (tries > 33) {
fprintf(stderr, "%s: stk500_program_enable(): can't get into sync\n",
progname);
return -1;
}
stk500_getsync(pgm);
goto retry;
}
else if (buf[0] != Resp_STK_INSYNC) {
fprintf(stderr,
"%s: stk500_program_enable(): protocol error, "
"expect=0x%02x, resp=0x%02x\n",
progname, Resp_STK_INSYNC, buf[0]);
return -1;
}
stk500_recv(pgm, buf, 1);
if (buf[0] == Resp_STK_OK) {
return 0;
}
else if (buf[0] == Resp_STK_NODEVICE) {
fprintf(stderr, "%s: stk500_program_enable(): no device\n",
progname);
return -1;
}
if(buf[0] == Resp_STK_FAILED)
{
fprintf(stderr,
"%s: stk500_program_enable(): failed to enter programming mode\n",
progname);
return -1;
}
fprintf(stderr, "%s: stk500_program_enable(): unknown response=0x%02x\n",
progname, buf[0]);
return -1;
}
/*
* apply power to the AVR processor
*/
static void stk500_powerup(PROGRAMMER * pgm)
{
return;
}
/*
* remove power from the AVR processor
*/
static void stk500_powerdown(PROGRAMMER * pgm)
{
return;
}
static int stk500_set_extended_parms(PROGRAMMER * pgm, int n,
unsigned char * cmd)
{
unsigned char buf[16];
int tries=0;
int i;
retry:
tries++;
buf[0] = Cmnd_STK_SET_DEVICE_EXT;
for (i=0; i<n; i++) {
buf[1+i] = cmd[i];
}
i++;
buf[i] = Sync_CRC_EOP;
stk500_send(pgm, buf, i+1);
stk500_recv(pgm, buf, 1);
if (buf[0] == Resp_STK_NOSYNC) {
if (tries > 33) {
fprintf(stderr, "%s: stk500_set_extended_parms(): can't get into sync\n",
progname);
return -1;
}
stk500_getsync(pgm);
goto retry;
}
else if (buf[0] != Resp_STK_INSYNC) {
fprintf(stderr,
"%s: stk500_set_extended_parms(): protocol error, "
"expect=0x%02x, resp=0x%02x\n",
progname, Resp_STK_INSYNC, buf[0]);
return -1;
}
stk500_recv(pgm, buf, 1);
if (buf[0] == Resp_STK_OK) {
return 0;
}
else if (buf[0] == Resp_STK_NODEVICE) {
fprintf(stderr, "%s: stk500_set_extended_parms(): no device\n",
progname);
return -1;
}
if(buf[0] == Resp_STK_FAILED)
{
fprintf(stderr,
"%s: stk500_set_extended_parms(): failed to set extended "
"device programming parameters\n",
progname);
return -1;
}
fprintf(stderr, "%s: stk500_set_extended_parms(): unknown response=0x%02x\n",
progname, buf[0]);
return -1;
}
/*
* initialize the AVR device and prepare it to accept commands
*/
static int stk500_initialize(PROGRAMMER * pgm, AVRPART * p)
{
unsigned char buf[32];
AVRMEM * m;
int tries;
unsigned maj, min;
int rc;
int n_extparms = 3;
stk500_getparm(pgm, Parm_STK_SW_MAJOR, &maj);
stk500_getparm(pgm, Parm_STK_SW_MINOR, &min);
if ((maj > 1) || ((maj == 1) && (min > 10)))
n_extparms = 4;
tries = 0;
retry:
tries++;
memset(buf, 0, sizeof(buf));
/*
* set device programming parameters
*/
buf[0] = Cmnd_STK_SET_DEVICE;
buf[1] = p->stk500_devcode;
buf[2] = 0; /* device revision */
if ((p->flags & AVRPART_SERIALOK) && (p->flags & AVRPART_PARALLELOK))
buf[3] = 0; /* device supports parallel and serial programming */
else
buf[3] = 1; /* device supports parallel only */
if (p->flags & AVRPART_PARALLELOK) {
if (p->flags & AVRPART_PSEUDOPARALLEL) {
buf[4] = 0; /* pseudo parallel interface */
n_extparms = 0;
}
else {
buf[4] = 1; /* full parallel interface */
}
}
#if 0
fprintf(stderr, "%s: stk500_initialize(): n_extparms = %d\n",
progname, n_extparms);
#endif
buf[5] = 1; /* polling supported - XXX need this in config file */
buf[6] = 1; /* programming is self-timed - XXX need in config file */
m = avr_locate_mem(p, "lock");
if (m)
buf[7] = m->size;
else
buf[7] = 0;
/*
* number of fuse bytes
*/
buf[8] = 0;
m = avr_locate_mem(p, "fuse");
if (m)
buf[8] += m->size;
m = avr_locate_mem(p, "lfuse");
if (m)
buf[8] += m->size;
m = avr_locate_mem(p, "hfuse");
if (m)
buf[8] += m->size;
m = avr_locate_mem(p, "efuse");
if (m)
buf[8] += m->size;
m = avr_locate_mem(p, "flash");
if (m) {
buf[9] = m->readback[0];
buf[10] = m->readback[1];
if (m->paged) {
buf[13] = (m->page_size >> 8) & 0x00ff;
buf[14] = m->page_size & 0x00ff;
}
buf[17] = (m->size >> 24) & 0xff;
buf[18] = (m->size >> 16) & 0xff;
buf[19] = (m->size >> 8) & 0xff;
buf[20] = m->size & 0xff;
}
else {
buf[9] = 0xff;
buf[10] = 0xff;
buf[13] = 0;
buf[14] = 0;
buf[17] = 0;
buf[18] = 0;
buf[19] = 0;
buf[20] = 0;
}
m = avr_locate_mem(p, "eeprom");
if (m) {
buf[11] = m->readback[0];
buf[12] = m->readback[1];
buf[15] = (m->size >> 8) & 0x00ff;
buf[16] = m->size & 0x00ff;
}
else {
buf[11] = 0xff;
buf[12] = 0xff;
buf[15] = 0;
buf[16] = 0;
}
buf[21] = Sync_CRC_EOP;
stk500_send(pgm, buf, 22);
stk500_recv(pgm, buf, 1);
if (buf[0] == Resp_STK_NOSYNC) {
fprintf(stderr,
"%s: stk500_initialize(): programmer not in sync, resp=0x%02x\n",
progname, buf[0]);
if (tries > 33)
return -1;
stk500_getsync(pgm);
goto retry;
return -1;
}
else if (buf[0] != Resp_STK_INSYNC) {
fprintf(stderr,
"%s: stk500_initialize(): (a) protocol error, "
"expect=0x%02x, resp=0x%02x\n",
progname, Resp_STK_INSYNC, buf[0]);
return -1;
}
stk500_recv(pgm, buf, 1);
if (buf[0] != Resp_STK_OK) {
fprintf(stderr,
"%s: stk500_initialize(): (b) protocol error, "
"expect=0x%02x, resp=0x%02x\n",
progname, Resp_STK_OK, buf[0]);
return -1;
}
if (n_extparms) {
if ((p->pagel == 0) || (p->bs2 == 0)) {
fprintf(stderr,
"%s: please define PAGEL and BS2 signals in the configuration "
"file for part %s\n",
progname, p->desc);
}
else {
buf[0] = n_extparms+1;
/*
* m is currently pointing to eeprom memory if the part has it
*/
if (m)
buf[1] = m->page_size;
else
buf[1] = 0;
buf[2] = p->pagel;
buf[3] = p->bs2;
if (n_extparms == 4) {
if (p->reset_disposition == RESET_DEDICATED)
buf[4] = 0;
else
buf[4] = 1;
}
rc = stk500_set_extended_parms(pgm, n_extparms+1, buf);
if (rc) {
fprintf(stderr, "%s: stk500_initialize(): failed\n", progname);
exit(1);
}
}
}
pgm->program_enable(pgm, p);
/*
* Return success even if program_enable() failed. Otherwise, if
* someone has turned off the STK500 oscillator (or set it to an
* unreasonably slow master clock), they were hosed at this point,
* since to reset fosc to a reasonable value, they at least need to
* get avrdude to start up in terminal mode. The luser has already
* seen a "failed to enter programming mode" message in that case,
* and he also needs to specify -F at program startup since the
* device ID bytes cannot be read in this situation.
*/
return 0;
}
static int stk500_save(PROGRAMMER * pgm)
{
return 0;
}
static void stk500_restore(PROGRAMMER * pgm)
{
return;
}
static void stk500_disable(PROGRAMMER * pgm)
{
unsigned char buf[16];
int tries=0;
retry:
tries++;
buf[0] = Cmnd_STK_LEAVE_PROGMODE;
buf[1] = Sync_CRC_EOP;
stk500_send(pgm, buf, 2);
stk500_recv(pgm, buf, 1);
if (buf[0] == Resp_STK_NOSYNC) {
if (tries > 33) {
fprintf(stderr, "%s: stk500_disable(): can't get into sync\n",
progname);
return;
}
stk500_getsync(pgm);
goto retry;
}
else if (buf[0] != Resp_STK_INSYNC) {
fprintf(stderr,
"%s: stk500_disable(): protocol error, expect=0x%02x, "
"resp=0x%02x\n",
progname, Resp_STK_INSYNC, buf[0]);
return;
}
stk500_recv(pgm, buf, 1);
if (buf[0] == Resp_STK_OK) {
return;
}
else if (buf[0] == Resp_STK_NODEVICE) {
fprintf(stderr, "%s: stk500_disable(): no device\n",
progname);
return;
}
fprintf(stderr, "%s: stk500_disable(): unknown response=0x%02x\n",
progname, buf[0]);
return;
}
static void stk500_enable(PROGRAMMER * pgm)
{
return;
}
static void stk500_open(PROGRAMMER * pgm, char * port)
{
strcpy(pgm->port, port);
pgm->fd = serial_open(port, 115200);
/*
* drain any extraneous input
*/
stk500_drain(pgm, 0);
stk500_getsync(pgm);
stk500_drain(pgm, 0);
}
static void stk500_close(PROGRAMMER * pgm)
{
serial_close(pgm->fd);
pgm->fd = -1;
}
static int stk500_loadaddr(PROGRAMMER * pgm, unsigned int addr)
{
unsigned char buf[16];
int tries;
tries = 0;
retry:
tries++;
buf[0] = Cmnd_STK_LOAD_ADDRESS;
buf[1] = addr & 0xff;
buf[2] = (addr >> 8) & 0xff;
buf[3] = Sync_CRC_EOP;
stk500_send(pgm, buf, 4);
stk500_recv(pgm, buf, 1);
if (buf[0] == Resp_STK_NOSYNC) {
if (tries > 33) {
fprintf(stderr, "%s: stk500_loadaddr(): can't get into sync\n",
progname);
return -1;
}
stk500_getsync(pgm);
goto retry;
}
else if (buf[0] != Resp_STK_INSYNC) {
fprintf(stderr,
"%s: stk500_loadaddr(): (a) protocol error, "
"expect=0x%02x, resp=0x%02x\n",
progname, Resp_STK_INSYNC, buf[0]);
return -1;
}
stk500_recv(pgm, buf, 1);
if (buf[0] == Resp_STK_OK) {
return 0;
}
fprintf(stderr,
"%s: loadaddr(): (b) protocol error, "
"expect=0x%02x, resp=0x%02x\n",
progname, Resp_STK_INSYNC, buf[0]);
return -1;
}
static int stk500_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
int page_size, int n_bytes)
{
unsigned char buf[16];
int memtype;
unsigned int addr;
int a_div;
int i;
int tries;
unsigned int n;
if (page_size == 0) {
page_size = 128;
}
if (strcmp(m->desc, "flash") == 0) {
memtype = 'F';
}
else if (strcmp(m->desc, "eeprom") == 0) {
memtype = 'E';
}
else {
return -2;
}
if ((m->op[AVR_OP_LOADPAGE_LO]) || (m->op[AVR_OP_READ_LO]))
a_div = 2;
else
a_div = 1;
if (n_bytes > m->size) {
n_bytes = m->size;
n = m->size;
}
else {
if ((n_bytes % page_size) != 0) {
n = n_bytes + page_size - (n_bytes % page_size);
}
else {
n = n_bytes;
}
}
#if 0
fprintf(stderr,
"n_bytes = %d\n"
"n = %u\n"
"a_div = %d\n"
"page_size = %d\n",
n_bytes, n, a_div, page_size);
#endif
for (addr = 0; addr < n; addr += page_size) {
if (verbose) {
fprintf(stderr, "\r \r%6u", addr);
}
tries = 0;
retry:
tries++;
stk500_loadaddr(pgm, addr/a_div);
buf[0] = Cmnd_STK_PROG_PAGE;
buf[1] = (page_size >> 8) & 0xff;
buf[2] = page_size & 0xff;
buf[3] = memtype;
stk500_send(pgm, buf, 4);
for (i=0; i<page_size; i++) {
buf[0] = m->buf[addr + i];
stk500_send(pgm, buf, 1);
}
buf[0] = Sync_CRC_EOP;
stk500_send(pgm, buf, 1);
stk500_recv(pgm, buf, 1);
if (buf[0] == Resp_STK_NOSYNC) {
if (tries > 33) {
fprintf(stderr, "\n%s: stk500_paged_write(): can't get into sync\n",
progname);
return -3;
}
stk500_getsync(pgm);
goto retry;
}
else if (buf[0] != Resp_STK_INSYNC) {
fprintf(stderr,
"\n%s: stk500_paged_write(): (a) protocol error, "
"expect=0x%02x, resp=0x%02x\n",
progname, Resp_STK_INSYNC, buf[0]);
return -4;
}
stk500_recv(pgm, buf, 1);
if (buf[0] != Resp_STK_OK) {
fprintf(stderr,
"\n%s: stk500_paged_write(): (a) protocol error, "
"expect=0x%02x, resp=0x%02x\n",
progname, Resp_STK_INSYNC, buf[0]);
return -5;
}
}
if (verbose) {
fprintf(stderr, "\r \r%6u", addr-1);
fprintf(stderr, "\n");
}
return n;
}
static int stk500_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
int page_size, int n_bytes)
{
unsigned char buf[16];
int memtype;
unsigned int addr;
int a_div;
int tries;
unsigned int n;
if (strcmp(m->desc, "flash") == 0) {
memtype = 'F';
}
else if (strcmp(m->desc, "eeprom") == 0) {
memtype = 'E';
}
else {
return -2;
}
if ((m->op[AVR_OP_LOADPAGE_LO]) || (m->op[AVR_OP_READ_LO]))
a_div = 2;
else
a_div = 1;
if (n_bytes > m->size) {
n_bytes = m->size;
n = m->size;
}
else {
if ((n_bytes % page_size) != 0) {
n = n_bytes + page_size - (n_bytes % page_size);
}
else {
n = n_bytes;
}
}
for (addr = 0; addr < n; addr += page_size) {
if (verbose) {
fprintf(stderr, "\r \r%6u", addr);
}
tries = 0;
retry:
tries++;
stk500_loadaddr(pgm, addr/a_div);
buf[0] = Cmnd_STK_READ_PAGE;
buf[1] = (page_size >> 8) & 0xff;
buf[2] = page_size & 0xff;
buf[3] = memtype;
buf[4] = Sync_CRC_EOP;
stk500_send(pgm, buf, 5);
stk500_recv(pgm, buf, 1);
if (buf[0] == Resp_STK_NOSYNC) {
if (tries > 33) {
fprintf(stderr, "\n%s: stk500_paged_load(): can't get into sync\n",
progname);
return -3;
}
stk500_getsync(pgm);
goto retry;
}
else if (buf[0] != Resp_STK_INSYNC) {
fprintf(stderr,
"\n%s: stk500_paged_load(): (a) protocol error, "
"expect=0x%02x, resp=0x%02x\n",
progname, Resp_STK_INSYNC, buf[0]);
return -4;
}
stk500_recv(pgm, &m->buf[addr], page_size);
stk500_recv(pgm, buf, 1);
if (buf[0] != Resp_STK_OK) {
fprintf(stderr,
"\n%s: stk500_paged_load(): (a) protocol error, "
"expect=0x%02x, resp=0x%02x\n",
progname, Resp_STK_INSYNC, buf[0]);
return -5;
}
}
if (verbose) {
fprintf(stderr, "\r \r%6u", addr-1);
fprintf(stderr, "\n");
}
return n;
}
static int stk500_set_vtarget(PROGRAMMER * pgm, double v)
{
unsigned uaref, utarg;
utarg = (unsigned)((v + 0.049) * 10);
if (stk500_getparm(pgm, Parm_STK_VADJUST, &uaref) != 0) {
fprintf(stderr,
"%s: stk500_set_vtarget(): cannot obtain V[aref]\n",
progname);
return -1;
}
if (uaref > utarg) {
fprintf(stderr,
"%s: stk500_set_vtarget(): reducing V[aref] from %.1f to %.1f\n",
progname, uaref / 10.0, v);
if (stk500_setparm(pgm, Parm_STK_VADJUST, utarg)
!= 0)
return -1;
}
return stk500_setparm(pgm, Parm_STK_VTARGET, utarg);
}
static int stk500_set_varef(PROGRAMMER * pgm, double v)
{
unsigned uaref, utarg;
uaref = (unsigned)((v + 0.049) * 10);
if (stk500_getparm(pgm, Parm_STK_VTARGET, &utarg) != 0) {
fprintf(stderr,
"%s: stk500_set_varef(): cannot obtain V[target]\n",
progname);
return -1;
}
if (uaref > utarg) {
fprintf(stderr,
"%s: stk500_set_varef(): V[aref] must not be greater than "
"V[target] = %.1f\n",
progname, utarg / 10.0);
return -1;
}
return stk500_setparm(pgm, Parm_STK_VADJUST, uaref);
}
static int stk500_set_fosc(PROGRAMMER * pgm, double v)
{
#define fbase 7372800U
unsigned prescale, cmatch, fosc;
static unsigned ps[] = {
1, 8, 32, 64, 128, 256, 1024
};
int idx, rc;
if (v <= 0.0) {
prescale = cmatch = 0;
goto setclock;
}
if (v > fbase / 2) {
const char *unit;
if (v > 1e6) {
v /= 1e6;
unit = "MHz";
} else if (v > 1e3) {
v /= 1e3;
unit = "kHz";
} else
unit = "Hz";
fprintf(stderr,
"%s: stk500_set_fosc(): f = %.3f %s too high, using %.3f MHz\n",
progname, v, unit, fbase / 2e6);
fosc = fbase / 2;
} else
fosc = (unsigned)v;
for (idx = 0; idx < sizeof(ps) / sizeof(ps[0]); idx++) {
if (fosc >= fbase / (256 * ps[idx] * 2)) {
/* this prescaler value can handle our frequency */
prescale = idx + 1;
cmatch = (unsigned)(fbase / (2 * v * ps[idx]));
break;
}
}
if (idx == sizeof(ps) / sizeof(ps[0])) {
fprintf(stderr, "%s: stk500_set_fosc(): f = %u Hz too low, %u Hz min\n",
progname, fosc, fbase / (256 * 1024 * 2));
return -1;
}
setclock:
if ((rc = stk500_setparm(pgm, Parm_STK_OSC_PSCALE, prescale)) != 0
|| (rc = stk500_setparm(pgm, Parm_STK_OSC_CMATCH, cmatch)) != 0)
return rc;
return 0;
}
static int stk500_getparm(PROGRAMMER * pgm, unsigned parm, unsigned * value)
{
unsigned char buf[16];
unsigned v;
int tries = 0;
retry:
tries++;
buf[0] = Cmnd_STK_GET_PARAMETER;
buf[1] = parm;
buf[2] = Sync_CRC_EOP;
stk500_send(pgm, buf, 3);
stk500_recv(pgm, buf, 1);
if (buf[0] == Resp_STK_NOSYNC) {
if (tries > 33) {
fprintf(stderr, "\n%s: stk500_getparm(): can't get into sync\n",
progname);
return -1;
}
stk500_getsync(pgm);
goto retry;
}
else if (buf[0] != Resp_STK_INSYNC) {
fprintf(stderr,
"\n%s: stk500_getparm(): (a) protocol error, "
"expect=0x%02x, resp=0x%02x\n",
progname, Resp_STK_INSYNC, buf[0]);
return -2;
}
stk500_recv(pgm, buf, 1);
v = buf[0];
stk500_recv(pgm, buf, 1);
if (buf[0] == Resp_STK_FAILED) {
fprintf(stderr,
"\n%s: stk500_getparm(): parameter 0x%02x failed\n",
progname, v);
return -3;
}
else if (buf[0] != Resp_STK_OK) {
fprintf(stderr,
"\n%s: stk500_getparm(): (a) protocol error, "
"expect=0x%02x, resp=0x%02x\n",
progname, Resp_STK_INSYNC, buf[0]);
return -3;
}
*value = v;
return 0;
}
static int stk500_setparm(PROGRAMMER * pgm, unsigned parm, unsigned value)
{
unsigned char buf[16];
int tries = 0;
retry:
tries++;
buf[0] = Cmnd_STK_SET_PARAMETER;
buf[1] = parm;
buf[2] = value;
buf[3] = Sync_CRC_EOP;
stk500_send(pgm, buf, 4);
stk500_recv(pgm, buf, 1);
if (buf[0] == Resp_STK_NOSYNC) {
if (tries > 33) {
fprintf(stderr, "\n%s: stk500_setparm(): can't get into sync\n",
progname);
return -1;
}
stk500_getsync(pgm);
goto retry;
}
else if (buf[0] != Resp_STK_INSYNC) {
fprintf(stderr,
"\n%s: stk500_setparm(): (a) protocol error, "
"expect=0x%02x, resp=0x%02x\n",
progname, Resp_STK_INSYNC, buf[0]);
return -2;
}
stk500_recv(pgm, buf, 1);
if (buf[0] == Resp_STK_OK)
return 0;
parm = buf[0]; /* if not STK_OK, we've been echoed parm here */
stk500_recv(pgm, buf, 1);
if (buf[0] == Resp_STK_FAILED) {
fprintf(stderr,
"\n%s: stk500_setparm(): parameter 0x%02x failed\n",
progname, parm);
return -3;
}
else {
fprintf(stderr,
"\n%s: stk500_setparm(): (a) protocol error, "
"expect=0x%02x, resp=0x%02x\n",
progname, Resp_STK_INSYNC, buf[0]);
return -3;
}
}
static void stk500_display(PROGRAMMER * pgm, char * p)
{
unsigned maj, min, hdw, topcard;
stk500_getparm(pgm, Parm_STK_HW_VER, &hdw);
stk500_getparm(pgm, Parm_STK_SW_MAJOR, &maj);
stk500_getparm(pgm, Parm_STK_SW_MINOR, &min);
stk500_getparm(pgm, Param_STK500_TOPCARD_DETECT, &topcard);
fprintf(stderr, "%sHardware Version: %d\n", p, hdw);
fprintf(stderr, "%sFirmware Version: %d.%d\n", p, maj, min);
if (topcard < 3) {
const char *n = "Unknown";
switch (topcard) {
case 1:
n = "STK502";
break;
case 2:
n = "STK501";
break;
}
fprintf(stderr, "%sTopcard : %s\n", p, n);
}
stk500_print_parms1(pgm, p);
return;
}
static void stk500_print_parms1(PROGRAMMER * pgm, char * p)
{
unsigned vtarget, vadjust, osc_pscale, osc_cmatch;
stk500_getparm(pgm, Parm_STK_VTARGET, &vtarget);
stk500_getparm(pgm, Parm_STK_VADJUST, &vadjust);
stk500_getparm(pgm, Parm_STK_OSC_PSCALE, &osc_pscale);
stk500_getparm(pgm, Parm_STK_OSC_CMATCH, &osc_cmatch);
fprintf(stderr, "%sVtarget : %.1f V\n", p, vtarget / 10.0);
fprintf(stderr, "%sVaref : %.1f V\n", p, vadjust / 10.0);
fprintf(stderr, "%sOscillator : ", p);
if (osc_pscale == 0)
fprintf(stderr, "Off\n");
else {
int prescale = 1;
double f = 3.6864e6;
const char *unit;
switch (osc_pscale) {
case 2: prescale = 8; break;
case 3: prescale = 32; break;
case 4: prescale = 64; break;
case 5: prescale = 128; break;
case 6: prescale = 256; break;
case 7: prescale = 1024; break;
}
f /= prescale;
f /= (osc_cmatch + 1);
if (f > 1e6) {
f /= 1e6;
unit = "MHz";
} else if (f > 1e3) {
f /= 1000;
unit = "kHz";
} else
unit = "Hz";
fprintf(stderr, "%.3f %s\n", f, unit);
}
return;
}
static void stk500_print_parms(PROGRAMMER * pgm)
{
stk500_print_parms1(pgm, "");
}
void stk500_initpgm(PROGRAMMER * pgm)
{
strcpy(pgm->type, "STK500");
/*
* mandatory functions
*/
pgm->rdy_led = stk500_rdy_led;
pgm->err_led = stk500_err_led;
pgm->pgm_led = stk500_pgm_led;
pgm->vfy_led = stk500_vfy_led;
pgm->initialize = stk500_initialize;
pgm->display = stk500_display;
pgm->save = stk500_save;
pgm->restore = stk500_restore;
pgm->enable = stk500_enable;
pgm->disable = stk500_disable;
pgm->powerup = stk500_powerup;
pgm->powerdown = stk500_powerdown;
pgm->program_enable = stk500_program_enable;
pgm->chip_erase = stk500_chip_erase;
pgm->cmd = stk500_cmd;
pgm->open = stk500_open;
pgm->close = stk500_close;
/*
* optional functions
*/
pgm->paged_write = stk500_paged_write;
pgm->paged_load = stk500_paged_load;
pgm->print_parms = stk500_print_parms;
pgm->set_vtarget = stk500_set_vtarget;
pgm->set_varef = stk500_set_varef;
pgm->set_fosc = stk500_set_fosc;
pgm->page_size = 256;
}
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