c/serial-pulse-dtr.c

   1 #include <stdio.h>
   2 #include <fcntl.h>
   3 #include <asm-generic/ioctls.h>
   4 #include <unistd.h>
   5
   6 /* Pulse DTR (Harvie 2o1o)
   7  * This can be used eg.: for reseting Arduino
   8  *
   9  * make serial-pulse-dtr
  10  * ./serial-pulse-dtr /dev/ttyUSB0
  11  *
  12  * (-; peace ;-)
  13  */
  14
  15 int main(int argc, char *argv[]) {
  16         if(argc < 2) printf("Usage: %s [/dev/tty*]\n", argv[0]);
  17
  18         int fd = open(argv[1], O_WRONLY);
  19         perror(argv[0]);
  20
  21         //DTR HIGH
  22         //ioctl(fd, TIOCSDTR);
  23         ioctl(fd, TIOCMBIS);
  24
  25         //Wait
  26         //system("sleep 0.1");
  27         usleep(100000);
  28
  29         //DTR LOW
  30         //ioctl(fd, TIOCCDTR);
  31         ioctl(fd, TIOCMBIC);
  32
  33         close(fd);
  34         return 0;
  35 }