avrdude/avrdude/ser_posix.c

387 lines
7.6 KiB
C

/*
* avrdude - A Downloader/Uploader for AVR device programmers
* Copyright (C) 2003-2004 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
*/
/* $Id$ */
/*
* Posix serial interface for avrdude.
*/
#if !defined(WIN32NATIVE)
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/time.h>
#include <fcntl.h>
#include <termios.h>
#include <unistd.h>
#include "serial.h"
extern char *progname;
extern int verbose;
long serial_recv_timeout = 5000; /* ms */
struct baud_mapping {
long baud;
speed_t speed;
};
/* There are a lot more baud rates we could handle, but what's the point? */
static struct baud_mapping baud_lookup_table [] = {
{ 1200, B1200 },
{ 2400, B2400 },
{ 4800, B4800 },
{ 9600, B9600 },
{ 19200, B19200 },
{ 38400, B38400 },
{ 57600, B57600 },
{ 115200, B115200 },
{ 230400, B230400 },
{ 0, 0 } /* Terminator. */
};
static speed_t serial_baud_lookup(long baud)
{
struct baud_mapping *map = baud_lookup_table;
while (map->baud) {
if (map->baud == baud)
return map->speed;
map++;
}
fprintf(stderr, "%s: serial_baud_lookup(): unknown baud rate: %ld",
progname, baud);
exit(1);
}
static int ser_setspeed(int fd, long baud)
{
int rc;
struct termios termios;
speed_t speed = serial_baud_lookup (baud);
if (!isatty(fd))
return -1;
/*
* initialize terminal modes
*/
rc = tcgetattr(fd, &termios);
if (rc < 0) {
fprintf(stderr, "%s: ser_setspeed(): tcgetattr() failed, %s",
progname, strerror(errno));
return -errno;
}
termios.c_iflag = 0;
termios.c_oflag = 0;
termios.c_cflag = 0;
termios.c_cflag |= (CS8 | CREAD | CLOCAL);
termios.c_lflag = 0;
termios.c_cc[VMIN] = 1;
termios.c_cc[VTIME] = 0;
cfsetospeed(&termios, speed);
cfsetispeed(&termios, speed);
rc = tcsetattr(fd, TCSANOW, &termios);
if (rc < 0) {
fprintf(stderr, "%s: ser_setspeed(): tcsetattr() failed, %s",
progname, strerror(errno));
return -errno;
}
#if 0
/*
* set non blocking mode
*/
rc = fcntl(fd, F_GETFL, 0);
fcntl(fd, F_SETFL, rc | O_NONBLOCK);
#endif
return 0;
}
static int ser_open(char * port, long baud)
{
int rc;
int fd;
/*
* open the serial port
*/
fd = open(port, O_RDWR | O_NOCTTY /*| O_NONBLOCK*/);
if (fd < 0) {
fprintf(stderr, "%s: ser_open(): can't open device \"%s\": %s\n",
progname, port, strerror(errno));
exit(1);
}
/*
* set serial line attributes
*/
rc = ser_setspeed(fd, baud);
if (rc) {
fprintf(stderr,
"%s: ser_open(): can't set attributes for device \"%s\"\n",
progname, port);
exit(1);
}
return fd;
}
static void ser_close(int fd)
{
/* FIXME: Should really restore the terminal to original state here. */
close(fd);
}
static int ser_send(int fd, unsigned char * buf, size_t buflen)
{
struct timeval timeout, to2;
fd_set wfds;
int nfds;
int rc;
unsigned char * p = buf;
size_t len = buflen;
if (!len)
return 0;
if (verbose > 3)
{
fprintf(stderr, "%s: Send: ", progname);
while (buflen) {
unsigned char c = *buf;
if (isprint(c)) {
fprintf(stderr, "%c ", c);
}
else {
fprintf(stderr, ". ");
}
fprintf(stderr, "[%02x] ", c);
buf++;
buflen--;
}
fprintf(stderr, "\n");
}
timeout.tv_sec = 0;
timeout.tv_usec = 500000;
to2 = timeout;
while (len) {
reselect:
FD_ZERO(&wfds);
FD_SET(fd, &wfds);
nfds = select(fd+1, NULL, &wfds, NULL, &to2);
if (nfds == 0) {
if (verbose >= 1)
fprintf(stderr,
"%s: ser_send(): programmer is not responding\n",
progname);
exit(1);
}
else if (nfds == -1) {
if (errno == EINTR || errno == EAGAIN) {
goto reselect;
}
else {
fprintf(stderr, "%s: ser_send(): select(): %s\n",
progname, strerror(errno));
exit(1);
}
}
rc = write(fd, p, (len > 1024) ? 1024 : len);
if (rc < 0) {
fprintf(stderr, "%s: ser_send(): write error: %s\n",
progname, strerror(errno));
exit(1);
}
p += rc;
len -= rc;
}
return 0;
}
static int ser_recv(int fd, unsigned char * buf, size_t buflen)
{
struct timeval timeout, to2;
fd_set rfds;
int nfds;
int rc;
unsigned char * p = buf;
size_t len = 0;
timeout.tv_sec = serial_recv_timeout / 1000L;
timeout.tv_usec = (serial_recv_timeout % 1000L) * 1000;
to2 = timeout;
while (len < buflen) {
reselect:
FD_ZERO(&rfds);
FD_SET(fd, &rfds);
nfds = select(fd+1, &rfds, NULL, NULL, &to2);
if (nfds == 0) {
if (verbose > 1)
fprintf(stderr,
"%s: ser_recv(): programmer is not responding\n",
progname);
return -1;
}
else if (nfds == -1) {
if (errno == EINTR || errno == EAGAIN) {
fprintf(stderr,
"%s: ser_recv(): programmer is not responding,reselecting\n",
progname);
goto reselect;
}
else {
fprintf(stderr, "%s: ser_recv(): select(): %s\n",
progname, strerror(errno));
exit(1);
}
}
rc = read(fd, p, (buflen - len > 1024) ? 1024 : buflen - len);
if (rc < 0) {
fprintf(stderr, "%s: ser_recv(): read error: %s\n",
progname, strerror(errno));
exit(1);
}
p += rc;
len += rc;
}
p = buf;
if (verbose > 3)
{
fprintf(stderr, "%s: Recv: ", progname);
while (len) {
unsigned char c = *p;
if (isprint(c)) {
fprintf(stderr, "%c ", c);
}
else {
fprintf(stderr, ". ");
}
fprintf(stderr, "[%02x] ", c);
p++;
len--;
}
fprintf(stderr, "\n");
}
return 0;
}
static int ser_drain(int fd, int display)
{
struct timeval timeout;
fd_set rfds;
int nfds;
int rc;
unsigned char buf;
timeout.tv_sec = 0;
timeout.tv_usec = 250000;
if (display) {
fprintf(stderr, "drain>");
}
while (1) {
FD_ZERO(&rfds);
FD_SET(fd, &rfds);
reselect:
nfds = select(fd+1, &rfds, NULL, NULL, &timeout);
if (nfds == 0) {
if (display) {
fprintf(stderr, "<drain\n");
}
break;
}
else if (nfds == -1) {
if (errno == EINTR) {
goto reselect;
}
else {
fprintf(stderr, "%s: ser_drain(): select(): %s\n",
progname, strerror(errno));
exit(1);
}
}
rc = read(fd, &buf, 1);
if (rc < 0) {
fprintf(stderr, "%s: ser_drain(): read error: %s\n",
progname, strerror(errno));
exit(1);
}
if (display) {
fprintf(stderr, "%02x ", buf);
}
}
return 0;
}
struct serial_device serial_serdev =
{
.open = ser_open,
.setspeed = ser_setspeed,
.close = ser_close,
.send = ser_send,
.recv = ser_recv,
.drain = ser_drain,
};
struct serial_device *serdev = &serial_serdev;
#endif /* WIN32NATIVE */