#include "libsurf.h"
#include "ljackv112.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#define NSAMP 100
#define STRLEN 100

static void usage () 
{
    fprintf(stderr, "calib: usage: calib -c chn board\n");
}

int main (int argc, char **argv)
{
     int i;
     int chn;
     char c;
     long id = 0;
     long ov;
     char bname[STRLEN] = { 0 };
     float v;

     while ((c = getopt(argc, argv, "c:b:")) 
	    != -1) {
	  switch (c) {
	  case 'c':
	       chn = atoi(optarg);
	       break;
	  case ':':
	       strncpy(bname, optarg, STRLEN - 1);
	       bname[STRLEN - 1] = 0;
	       break;
	  default:
	       strncpy(bname, optarg, STRLEN - 1);
	       bname[STRLEN - 1] = 0;
	       break;
	  case '?':
	       usage();
	  }
     }
     
     fprintf(stderr, "Calibrating board %s, chn %d\n", bname, chn);
     
     for (i = 0; i < 0x100; ++i) {
	  int j;
	  float sum = 0;
	  if (surf_brd_set_anl_dac(bname, chn, i) < 0)
	       return 2;
	  printf("RDAC %d:", i);
	  /* allow some time to settle */
	  sleep(1);
	  for (j = 0; j < NSAMP; ++j) {
	       if (EAnalogIn(&id, 0, 0, 0, &ov, &v))
		    return 3;
	       sum += v;
	  }
	  printf(" %.3f\n", sum / (double)NSAMP);
     }
     
     return 0;
}