Commit bca52d65 authored by wdenk's avatar wdenk
Browse files

Initial revision

parent fbd71bf6
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <sys/time.h>
#include "serial.h"
#if defined(__sun__) || \
defined(__OpenBSD__) || \
defined(__FreeBSD__) || \
defined(__NetBSD__) || \
defined(__APPLE__)
static struct termios tios = { BRKINT, 0, B115200|CS8|CREAD, 0, { 0 } };
#else
static struct termios tios = { BRKINT, 0, B115200|CS8|CREAD, 0, 0 };
#endif
static struct speedmap {
char *str;
speed_t val;
} speedmap[] = {
{ "50", B50 }, { "75", B75 }, { "110", B110 },
{ "134", B134 }, { "150", B150 }, { "200", B200 },
{ "300", B300 }, { "600", B600 }, { "1200", B1200 },
{ "1800", B1800 }, { "2400", B2400 }, { "4800", B4800 },
{ "9600", B9600 }, { "19200", B19200 }, { "38400", B38400 },
{ "57600", B57600 },
#ifdef B76800
{ "76800", B76800 },
#endif
{ "115200", B115200 },
#ifdef B153600
{ "153600", B153600 },
#endif
{ "230400", B230400 },
#ifdef B307200
{ "307200", B307200 },
#endif
#ifdef B460800
{ "460800", B460800 }
#endif
};
static int nspeeds = sizeof speedmap / sizeof speedmap[0];
speed_t
cvtspeed(char *str)
{
struct speedmap *smp = speedmap, *esmp = &speedmap[nspeeds];
while (smp < esmp) {
if (strcmp(str, smp->str) == 0)
return (smp->val);
smp++;
}
return B0;
}
int
serialopen(char *device, speed_t speed)
{
int fd;
if (cfsetospeed(&tios, speed) < 0)
return -1;
if ((fd = open(device, O_RDWR)) < 0)
return -1;
if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {
(void)close(fd);
return -1;
}
return fd;
}
int
serialreadchar(int fd, int timeout)
{
fd_set fds;
struct timeval tv;
int n;
char ch;
tv.tv_sec = timeout;
tv.tv_usec = 0;
FD_ZERO(&fds);
FD_SET(fd, &fds);
/* this is a fucking horrible quick hack - fix this */
if ((n = select(fd + 1, &fds, 0, 0, &tv)) < 0)
return SERIAL_ERROR;
if (n == 0)
return SERIAL_TIMEOUT;
if ((n = read(fd, &ch, 1)) < 0)
return SERIAL_ERROR;
if (n == 0)
return SERIAL_EOF;
return ch;
}
int
serialwrite(int fd, char *buf, int len)
{
int n;
do {
n = write(fd, buf, len);
if (n < 0)
return 1;
len -= n;
buf += n;
} while (len > 0);
return 0;
}
int
serialclose(int fd)
{
return close(fd);
}
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