/*ISO_out.c
Isolated Digital output application for the 37e12
 */

/*! @defgroup ISO_out ISO_out - ISO_out.c
  This module is used to build the ISO_out application.
  ISO_out is used to write to the external high-drive port of 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_out                                     *
*Nathan Z. Gustavson                         *
*Emac.inc                                    * 
*"__DATE__"                                 *   
*usage:                                      *   
*ISO_out device data                         *
*ex:                                         *
*ISO_out /dev/37e12 0xAA                     *
*Sends 0xAA out the ISO digital port         *
*of /dev/37e12                               *
**********************************************\n";
printf("%s",help_table);
return 0;
}

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

int fd;
isodata data;

ARGCHECK(3);
OPENDEV(fd,argv[1]);


data = strtoul(argv[2],NULL,0);

ioctl(fd,ISO_DIG_OUT,&data); 

close(fd);
return 0;
}