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stk500.c
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stk500.c
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/*
* avrdude - A Downloader/Uploader for AVR device programmers
* Copyright (C) 2002-2004 Brian S. Dean <bsd@bsdhome.com>
* Copyright (C) 2008 Joerg Wunsch
*
* 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, see <http://www.gnu.org/licenses/>.
*/
/* $Id$ */
/*
* 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 <unistd.h>
#include "avrdude.h"
#include "avr.h"
#include "pgm.h"
#include "stk500.h"
#include "stk500_private.h"
#include "serial.h"
#define STK500_XTAL 7372800U
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, const char * p);
static int stk500_send(PROGRAMMER * pgm, unsigned char * buf, size_t len)
{
return serial_send(&pgm->fd, buf, len);
}
static int stk500_recv(PROGRAMMER * pgm, unsigned char * buf, size_t len)
{
int rv;
rv = serial_recv(&pgm->fd, buf, len);
if (rv < 0) {
fprintf(stderr,
"%s: stk500_recv(): programmer is not responding\n",
progname);
return -1;
}
return 0;
}
int stk500_drain(PROGRAMMER * pgm, int display)
{
return serial_drain(&pgm->fd, display);
}
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;
/*
* First send and drain a few times to get rid of line noise
*/
stk500_send(pgm, buf, 2);
stk500_drain(pgm, 0);
stk500_send(pgm, buf, 2);
stk500_drain(pgm, 0);
stk500_send(pgm, buf, 2);
if (stk500_recv(pgm, resp, 1) < 0)
return -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);
return -1;
}
if (stk500_recv(pgm, resp, 1) < 0)
return -1;
if (resp[0] != Resp_STK_OK) {
fprintf(stderr,
"%s: stk500_getsync(): can't communicate with device: "
"resp=0x%02x\n",
progname, resp[0]);
return -1;
}
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, const unsigned char *cmd,
unsigned char *res)
{
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);
if (stk500_recv(pgm, buf, 1) < 0)
exit(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];
if (stk500_recv(pgm, &res[3], 1) < 0)
exit(1);
if (stk500_recv(pgm, buf, 1) < 0)
exit(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];
if (pgm->cmd == NULL) {
fprintf(stderr,
"%s: Error: %s programmer uses stk500_chip_erase() but does not\n"
"provide a cmd() method.\n",
progname, pgm->type);
return -1;
}
if (p->op[AVR_OP_CHIP_ERASE] == NULL) {
fprintf(stderr, "chip erase instruction not defined for part \"%s\"\n",
p->desc);
return -1;
}
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);
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);
if (stk500_recv(pgm, buf, 1) < 0)
exit(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;
}
if (stk500_getsync(pgm) < 0)
return -1;
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;
}
if (stk500_recv(pgm, buf, 1) < 0)
exit(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;
}
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);
if (stk500_recv(pgm, buf, 1) < 0)
exit(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;
}
if (stk500_getsync(pgm) < 0)
return -1;
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;
}
if (stk500_recv(pgm, buf, 1) < 0)
exit(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;
}
/*
* Crossbow MIB510 initialization and shutdown. Use cmd = 1 to
* initialize, cmd = 0 to close.
*/
static int mib510_isp(PROGRAMMER * pgm, unsigned char cmd)
{
unsigned char buf[9];
int tries = 0;
buf[0] = 0xaa;
buf[1] = 0x55;
buf[2] = 0x55;
buf[3] = 0xaa;
buf[4] = 0x17;
buf[5] = 0x51;
buf[6] = 0x31;
buf[7] = 0x13;
buf[8] = cmd;
retry:
tries++;
stk500_send(pgm, buf, 9);
if (stk500_recv(pgm, buf, 1) < 0)
exit(1);
if (buf[0] == Resp_STK_NOSYNC) {
if (tries > 33) {
fprintf(stderr, "%s: mib510_isp(): can't get into sync\n",
progname);
return -1;
}
if (stk500_getsync(pgm) < 0)
return -1;
goto retry;
}
else if (buf[0] != Resp_STK_INSYNC) {
fprintf(stderr,
"%s: mib510_isp(): protocol error, "
"expect=0x%02x, resp=0x%02x\n",
progname, Resp_STK_INSYNC, buf[0]);
return -1;
}
if (stk500_recv(pgm, buf, 1) < 0)
exit(1);
if (buf[0] == Resp_STK_OK) {
return 0;
}
else if (buf[0] == Resp_STK_NODEVICE) {
fprintf(stderr, "%s: mib510_isp(): no device\n",
progname);
return -1;
}
if (buf[0] == Resp_STK_FAILED)
{
fprintf(stderr,
"%s: mib510_isp(): command %d failed\n",
progname, cmd);
return -1;
}
fprintf(stderr, "%s: mib510_isp(): 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;
stk500_getparm(pgm, Parm_STK_SW_MAJOR, &maj);
stk500_getparm(pgm, Parm_STK_SW_MINOR, &min);
// MIB510 does not need extparams
if (strcmp(ldata(lfirst(pgm->id)), "mib510") == 0)
n_extparms = 0;
else if ((maj > 1) || ((maj == 1) && (min > 10)))
n_extparms = 4;
else
n_extparms = 3;
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);
if (stk500_recv(pgm, buf, 1) < 0)
exit(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;
if (stk500_getsync(pgm) < 0)
return -1;
goto retry;
}
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;
}
if (stk500_recv(pgm, buf, 1) < 0)
exit(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)) {
if (verbose > 1)
fprintf(stderr,
"%s: PAGEL and BS2 signals not defined in the configuration "
"file for part %s, using dummy values\n",
progname, p->desc);
buf[2] = 0xD7; /* they look somehow possible, */
buf[3] = 0xA0; /* don't they? ;) */
}
else {
buf[2] = p->pagel;
buf[3] = p->bs2;
}
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;
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);
}
}
return pgm->program_enable(pgm, p);
}
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);
if (stk500_recv(pgm, buf, 1) < 0)
exit(1);
if (buf[0] == Resp_STK_NOSYNC) {
if (tries > 33) {
fprintf(stderr, "%s: stk500_disable(): can't get into sync\n",
progname);
return;
}
if (stk500_getsync(pgm) < 0)
return;
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;
}
if (stk500_recv(pgm, buf, 1) < 0)
exit(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 int stk500_open(PROGRAMMER * pgm, char * port)
{
strcpy(pgm->port, port);
if (serial_open(port, pgm->baudrate? pgm->baudrate: 115200, &pgm->fd)==-1) {
return -1;
}
/*
* drain any extraneous input
*/
stk500_drain(pgm, 0);
// MIB510 init
if (strcmp(ldata(lfirst(pgm->id)), "mib510") == 0 &&
mib510_isp(pgm, 1) != 0)
return -1;
if (stk500_getsync(pgm) < 0)
return -1;
return 0;
}
static void stk500_close(PROGRAMMER * pgm)
{
// MIB510 close
if (strcmp(ldata(lfirst(pgm->id)), "mib510") == 0)
(void)mib510_isp(pgm, 0);
serial_close(&pgm->fd);
pgm->fd.ifd = -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);
if (stk500_recv(pgm, buf, 1) < 0)
exit(1);
if (buf[0] == Resp_STK_NOSYNC) {
if (tries > 33) {
fprintf(stderr, "%s: stk500_loadaddr(): can't get into sync\n",
progname);
return -1;
}
if (stk500_getsync(pgm) < 0)
return -1;
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;
}
if (stk500_recv(pgm, buf, 1) < 0)
exit(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,
unsigned int page_size,
unsigned int addr, unsigned int n_bytes)
{
unsigned char buf[page_size + 16];
int memtype;
int a_div;
int block_size;
int tries;
unsigned int n;
unsigned int i;
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;
n = addr + 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 < n; addr += block_size) {
// MIB510 uses fixed blocks size of 256 bytes
if (strcmp(ldata(lfirst(pgm->id)), "mib510") == 0) {
block_size = 256;
} else {
if (n - addr < page_size)
block_size = n - addr;
else
block_size = page_size;
}
tries = 0;
retry:
tries++;
stk500_loadaddr(pgm, addr/a_div);
/* build command block and avoid multiple send commands as it leads to a crash
of the silabs usb serial driver on mac os x */
i = 0;
buf[i++] = Cmnd_STK_PROG_PAGE;
buf[i++] = (block_size >> 8) & 0xff;
buf[i++] = block_size & 0xff;
buf[i++] = memtype;
memcpy(&buf[i], &m->buf[addr], block_size);
i += block_size;
buf[i++] = Sync_CRC_EOP;
stk500_send( pgm, buf, i);
if (stk500_recv(pgm, buf, 1) < 0)
exit(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;
}
if (stk500_getsync(pgm) < 0)
return -1;
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;
}
if (stk500_recv(pgm, buf, 1) < 0)
exit(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;
}
}
return n_bytes;
}
static int stk500_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
unsigned int page_size,
unsigned int addr, unsigned int n_bytes)
{
unsigned char buf[16];
int memtype;
int a_div;
int tries;
unsigned int n;
int block_size;
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;
n = addr + n_bytes;
for (; addr < n; addr += block_size) {
// MIB510 uses fixed blocks size of 256 bytes
if (strcmp(ldata(lfirst(pgm->id)), "mib510") == 0) {
block_size = 256;
} else {
if (n - addr < page_size)
block_size = n - addr;
else
block_size = page_size;
}
tries = 0;
retry:
tries++;
stk500_loadaddr(pgm, addr/a_div);
buf[0] = Cmnd_STK_READ_PAGE;
buf[1] = (block_size >> 8) & 0xff;
buf[2] = block_size & 0xff;
buf[3] = memtype;
buf[4] = Sync_CRC_EOP;
stk500_send(pgm, buf, 5);
if (stk500_recv(pgm, buf, 1) < 0)
exit(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;
}
if (stk500_getsync(pgm) < 0)
return -1;
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;
}
if (stk500_recv(pgm, &m->buf[addr], block_size) < 0)
exit(1);
if (stk500_recv(pgm, buf, 1) < 0)
exit(1);
if(strcmp(ldata(lfirst(pgm->id)), "mib510") == 0) {
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 -5;
}
}
else {
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_OK, buf[0]);
return -5;
}
}
}
return n_bytes;
}
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, unsigned int chan /* unused */,
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)
{
unsigned prescale, cmatch, fosc;
static unsigned ps[] = {
1, 8, 32, 64, 128, 256, 1024
};
int idx, rc;
prescale = cmatch = 0;
if (v > 0.0) {
if (v > STK500_XTAL / 2) {