/* atmtest1.c */

/* This program reads one register from the "control region" */
/* (local address base 0x04000000) of the APE 25             */

#include <stdio.h>
#include <fcntl.h>

#include "atmuser.h"

int iobuf[1024];

void main(
int argc,
char **argv)
{
   int fd;
   int regid;

   fd = open("/dev/ape25", O_RDWR);

   if (fd < 0)
   {
      printf("Device /dev/ape25 could not be opened.  \n");
      exit(1);
   }

   if (argc < 2)
   {
      printf("This program reads one control region register \n");
      printf("You must supply its OFFSET in hex as parm 1.   \n");
      exit(1);
   }

   sscanf(argv[1], "%x", iobuf + 0);     /* Id of reg to read */

   ioctl(fd, AIO_RDCREG, iobuf);

   printf("Value of control reg %x is %x \n", iobuf[0], iobuf[1]);
}