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Sourcecode: zaptel version File versions

timertest.c

#include <string.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <sys/select.h>
#include <sys/time.h>
#include <errno.h>
#include "zaptel.h"

int main(int argc, char *argv[])
{
      int fd;
      int x = 8000;
      int res;
      fd_set fds;
      struct timeval orig, now;
      fd = open("/dev/zap/timer", O_RDWR);
      if (fd < 0) {
            fprintf(stderr, "Unable to open timer: %s\n", strerror(errno));
            exit(1);
      }
      printf("Opened timer...\n");
      if (ioctl(fd, ZT_TIMERCONFIG, &x)) {
            fprintf(stderr, "Unable to set timer: %s\n", strerror(errno));
            exit(1);
      }
      printf("Set timer duration to %d samples (%d ms)\n", x, x/8);
      printf("Waiting...\n");
      gettimeofday(&orig, NULL);
      for(;;) {
            FD_ZERO(&fds);
            FD_SET(fd, &fds);
            res = select(fd + 1, NULL, NULL, &fds, NULL);
            if (res != 1) {
                  fprintf(stderr, "Unexpected result %d: %s\n", res, strerror(errno));
                  exit(1);
            }
            x = -1;
            if (ioctl(fd, ZT_TIMERACK, &x)) {
                  fprintf(stderr, "Unable to ack timer: %s\n", strerror(errno));
                  exit(1);
            }
            gettimeofday(&now, NULL);
            printf("Timer Expired (%d ms)!\n", (now.tv_sec - orig.tv_sec) * 1000 + (now.tv_usec - orig.tv_usec) / 1000);
      }
      exit(0);
}

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