signalcheck.c

实现ipvlbi数据记录

/**************************************************************/
/*                                                            */
/*   Program Name :  signalcheck                              */
/*                                                            */
/*      Version:  0.00  2002-10-04                            */
/*                0.10  2002-10-04                            */
/*                                                            */
/*      Copyright (c) 2002 T.Kondo/CRL All Right Reserved     */
/*                                                            */
/**************************************************************/
/*
/*
     Signal check program 
        巊梡朄  signalcheck

               IP-VLBI儃乕僪偵揔愗側儗儀儖偺10MHz,1PPS偑
               愙懕偝傟偰傞偐偳偆偐偺僠僃僢僋傪峴偆

*/
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/tdsio.h>

int main(int argc, char **argv)
{
    char dev[] = "/dev/tds0";  // IP-VLBI BOARD control variable
	int fd_in,rv;
    unsigned int stat;
	
	printf("\n  IP-VLBI board 10MHz and 1PPS signal checking..\n\n");

	fd_in = open(dev, O_RDONLY);  //僨僶僀僗偺僆乕僾儞
	if (fd_in == -1) {
		perror("device open() error ");
		return -1;
	}
	//printf("         Device open successd No.[%d]\n",fd_in);
	
       /* board status check */
 	rv = ioctl(fd_in, TDSIO_GET_STATUS, &stat);
	if (rv == -1) {
		perror("   ioctl() status get failed ");
		goto end;
	}
	else {
              /* satatus get again just in case */
 	       rv = ioctl(fd_in, TDSIO_GET_STATUS, &stat);
	       if (rv == -1) {
		    perror("   ioctl() status get failed ");
		    goto end;
	       }
	       //printf("ioctl() status get succeed\n");
             // printf(" status = %X\n",stat);
              if((stat & 1) != 1){
                  printf("   Warning! 10MHz signal is not supplied. \n");
              } else {
                  printf("   10MHz signal is OK!\n");
              }
              if((stat & 2) != 2){
                  printf("   Warning! 1PPS signal is not supplied. \n");
              } else {
                  printf("   1PPS  signal is OK!\n");
              }
              if((stat & 3) != 3){
                  printf("   Check signal connection and try again!\n");
                  goto end;
              }
	}
end:
	printf("\n");
	close(fd_in);

}