/* This program calculates calibration constants for the Dataq DI194RS serial */
/* data acquisition device.                                                   */

#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <iostream>
#include <iomanip>
using namespace std;

#include "dataqsdk.h"

#define	TRUE		1
#define FALSE		0
#define PRODUCTNAME	"DI-194RS"
#define MAXCHANNELS	4
#define DATAMASK	0x0000FFC0

#ifndef CALFILENAME
#define CALFILENAME	"/etc/di194rs.cal"
#endif

#ifndef SERIALPORT
#ifdef __OpenBSD__
#define SERIALPORT	"/dev/cua00"
#endif
#ifdef __linux__
#define SERIALPORT 	"/dev/ttyS0"
#endif
#endif

static void SDKerror(dataqsdk *dev, char *caller, int abortflag)
{
  long int error_code = 0;

  if (dev->ControlError(error_code))
  {
    fprintf(stderr, "ERROR: %s() failed, %s\n", caller, strerror(error_code));
    if (abortflag) exit(1);
  }
}

static void GetCalibration(short int *offsets, float *scalefactors)
{
  FILE *calfile;
  int i;

  calfile = fopen(CALFILENAME, "r");
  if (calfile == NULL)
  {
    fprintf(stderr, "ERROR: fopen() for %s failed, %s\n",
            CALFILENAME, strerror(errno));
    exit(1);
  }

  for (i = 0; i < MAXCHANNELS; i++)
    fscanf(calfile, "%hd %e\n", &offsets[i], &scalefactors[i]);

  fclose(calfile);
}

static void SaveCalibration(short int *offsets, float *scalefactors)
{
  FILE *calfile;
  int i;

  calfile = fopen(CALFILENAME, "w");
  if (calfile == NULL)
  {
    fprintf(stderr, "ERROR: fopen() for %s failed, %s\n",
            CALFILENAME, strerror(errno));
    exit(1);
  }

  for (i = 0; i < MAXCHANNELS; i++)
    fprintf(calfile, "%d %e\n", offsets[i], scalefactors[i]);

  fclose(calfile);
}