#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <linux/fs.h>
#include <termios.h>
#include <sys/types.h>
#include <fcntl.h>
#include "../h/icp_mio_hw.h"

void *ctr_val;
int mystdin, fd_ai_ch;
ssize_t bytes_read;	
char ch;
size_t nbytes = 4, cnst = 4;
off_t offset = 0;

void ainp_test(int ctr_num)
{
 fd_ai_ch = open("/dev/mio0.ai0",0,0);
 printf("The file descroptor for the ai is: %d\n", fd_ai_ch);

ioctl(fd_ai_ch,MIO_IOCTL_AI_CH_ADC_BIP_INP_RANGE, 0);
ioctl(fd_ai_ch,MIO_IOCTL_AI_CH_ADC_INP_RANGE, 1);
ioctl(fd_ai_ch,MIO_IOCTL_AI_CH_ADC_UNITS, ADC_mV_UNIT);

 /*
 ** permanent read
 */
 /* set stdin to non-blocking */
  mystdin = open("/dev/stdin", 0, 0);
  printf("The file descroptor for the stdin is: %d\n", mystdin);

 if(mystdin < 0)
 {
   printf("stdin open error\n");
   return;
 }
 
 printf("Usage: to switch to the next input value just press ENTER\n");
 printf("       to switch to the next test step just press SPACE and then ENTER\n");
 printf("       to break down the test just press Z and then ENTER\n");
 
  do
 {
   printf("Entering loop\n");//<- IT PRINTS THIS AND GETS BLOCKED!
   bytes_read = read(fd_ai_ch, &ctr_val, nbytes);
   printf("Bytes read\n");
   if ( bytes_read !=  cnst)
   {
     printf ("read error on ai_ch_0\n");
     close(mystdin);
     return;
   }else
   {
     printf ("ai_ch input value %i\n", ctr_val);
   }
   /* block */
   read(mystdin /*stdin */, &ch, 1);
   usleep( 100000 );
 }while ((ch != ' ') && (ch != 'Z'));
 close(mystdin);
 
  if ( ch == 'Z' )
 {
 
   printf ("User break\n");
   return;
 }
 close(fd_ai_ch);
 return;
}