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#include <sys/types.h> | |
#include <sys/stat.h> | |
#include <stdio.h> | |
#include <fcntl.h> | |
#include <termios.h> | |
#include <pthread.h> | |
#include <unistd.h> | |
#include <time.h> | |
#include <poll.h> | |
#include <string.h> | |
#include <errno.h> | |
#include <err.h> | |
#define TTY "/dev/ttyUSB0" | |
int main(void) | |
{ | |
struct termios tio; | |
int fd; | |
char buf[] = "TESTING123\n"; | |
fd = open(TTY, O_RDWR); | |
if (fd < 0) { | |
err(errno, "failed to open %s", TTY); | |
} | |
if (!isatty(fd)) { | |
err(errno, "not a tty!"); | |
} | |
cfmakeraw(&tio); | |
tio.c_cc[VMIN] = 0; | |
tio.c_cc[VTIME] = 1; | |
cfsetispeed(&tio, B19200); | |
cfsetospeed(&tio, B19200); | |
if (tcsetattr(fd, TCSANOW, &tio)) { | |
err(errno, "can't configure tty"); | |
} | |
while (1) { | |
printf("send\n"); | |
write(fd, buf, strlen(buf)); | |
printf("send done\n"); | |
} | |
close(fd); | |
return 0; | |
} |
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