WSJT-X/ptt_linux.c
Joe Taylor c909fc794e Corrected logic in ptt_linux.c.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/trunk@49 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
2006-01-05 20:38:27 +00:00

45 lines
857 B
C

#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/io.h>
int ptt_(int *nport, int *ntx, int *iptt)
{
static int nopen=0;
int control = TIOCM_RTS | TIOCM_DTR;
int fd;
char s[11];
if(*nport < 0) {
*iptt=*ntx;
return(0);
}
if(*ntx && (!nopen)) {
sprintf(s,"/dev/ttyS%d",*nport);
//open the device
if ((fd = open(s, O_RDWR | O_NDELAY)) < 0) {
fprintf(stderr, "device not found");
return(1);
}
nopen=1;
return(0);
}
if(*ntx && nopen) {
// printf("Set DTR/RTS %d %d\n",TIOCMBIS,control);
ioctl(fd, TIOCMBIS, &control); // Set DTR and RTS
*iptt=1;
}
else {
// printf("Clear DTR/RTS %d %d\n",TIOCMBIC,control);
ioctl(fd, TIOCMBIC, &control);
close(fd);
*iptt=0;
nopen=0;
}
return(0);
}