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ISO_in.c

/*ISO_in.c
Isolated Digital input application for the 37e12
 */



#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <sys/types.h>
#include <asm/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <signal.h>
#include <sched.h>
#include <sys/resource.h>
#include <sys/io.h>
#include <E12user.h>




#define ARGCHECK(num){if(argc!=num){printf("invalid number of arguements\n");help();return -1;}}

#define OPENDEV(filed,dev){if((filed = open(dev, O_RDWR))<=0){printf("couldn't open %s\n",dev);return -1;}}

static int help(void)
{
const char *help_table = "**********************************************
*ISO_in                                      *
*Nathan Z. Gustavson                         *
*Emac.inc                                    * 
*"__DATE__"                                 *   
*usage:                                      *   
*ISO_in device                               *
*ex:                                         *
*ISO_in /dev/37e12                           *
*reads the hex value of the ISO_in port      *
*of /dev/37e12                               *
**********************************************\n";
printf("%s",help_table);
return 0;
}

int main(int argc, char **argv)
{

int fd;
isodata data;

ARGCHECK(2);
OPENDEV(fd,argv[1]);

ioctl(fd,ISO_DIG_IN,&data); 

printf("%x\n",data);

close(fd);
return 0;
}

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