Dscad.c

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//=============================================================================
// File: DSCADSample.c   v2.0
// Desc: Sample program that demonstrates how to take an AD sample
// Date: 9/7/01  KL
//(c) Copyright 2001 Diamond Systems Corporation. Use of this source code
//is subject to the terms of Diamond Systems' Software License Agreement.
//Diamond Systems provides no warranty of proper performance if this
//source code is modified.
//=============================================================================
#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#include <math.h>
#include "mgui.h"
#include "DAS_Spatram.h"
#include "dscud.h"



// macros defined
#define ERROR_PREFIX "DMM Driver ERROR:"


// var declarations
BYTE result; // returned error code
DSCB dscb; // handle used to refer to the board
DSCCB dsccb; // structure containing board settings
DSCADSETTINGS dscadsettings; // structure containing A/D conversion settings
DSCADSCAN dscadscan; // structure containing A/D scan settings
WORD* samples;  // sample readings
double voltage; // actual voltage
ERRPARAMS errorParams;
extern int Incr_Read_Temp;

DSCAIOINT dscaioint; // structure containing auto-calibration settings
DSCS dscs; // used for interrupts.

omuthr OMUTHR;

void D_readtemp_int(void);


void DSCAD_Error(char *err, int w)
{
    MOBJECT sh, lbl;
    char buf[64];
    sh = MCreateShell("AD Error", 0);
    MObjectSetBackgroundRGB(sh, DPAL.DB_BG[0], DPAL.DB_BG[1], DPAL.DB_BG[2]);
    
    sprintf(buf, "%d ) %s",w, err);
    lbl = MCreateLabel(sh, buf, HELV_SMALL);
    MObjectSetBackgroundRGB(lbl, DPAL.DB_BG_Albl[0], DPAL.DB_BG_Albl[1], DPAL.DB_BG_Albl[2]);
    MObjectSetForegroundRGB(lbl, DPAL.DB_FG_Albl[0], DPAL.DB_FG_Albl[1], DPAL.DB_FG_Albl[2]);
    MObjectSetShadow(lbl, WS_SHADOW_OUT, 1, 0);
    MShellRealize(sh);
}


void D_rt(void)
{

    D_readtemp_int();

}

void D_readtemp_int(void)
{

    int i;
//=========================================================================
// V. SCANNING AND OUTPUT
//
//    Perform the actual sampling and then output the results. To calculate
//    the actual input voltages, we must convert the sample code (which
//    must be cast to a short to get the correct code) and then plug it
//    into one of the formulas located in the manual for your board (under
//    "A/D Conversion Formulas"). 
    //=========================================================================


    if( ( result = dscADScan( dscb, &dscadscan, samples ) ) != DE_NONE )
    {
//          fprintf( stderr, "%s%s\n", ERROR_PREFIX, dscGetErrorString( result ) );
//          free( samples ); // remember to deallocate malloc() memory
//          return;
    }

    for( i = dscadscan.low_channel; i < dscadscan.high_channel + 1; i++)
    {
            if( dscadsettings.range == RANGE_10 && dscadsettings.polarity == BIPOLAR)
            {
                voltage = ((short)dscadscan.sample_values[i] / 2048.0 * 10.0) - 10.0;
            }
            else if( dscadsettings.range == RANGE_5 && dscadsettings.polarity == BIPOLAR )
            {
                voltage = ((short)dscadscan.sample_values[i] / 2048.0 * 5.0 ) - 5.0;
            }
            else if( dscadsettings.range == RANGE_5 && dscadsettings.polarity == UNIPOLAR )
                voltage = ( (short)dscadscan.sample_values[i] / 4096.0) * 5.0;
            else voltage = ( (short)dscadscan.sample_values[i] / 4096.0) * 10.0;

            OMUTHR.ADVolt[i] = (voltage / pow(2, dscadsettings.gain));
    }
}


 int D_InitPC104(void)
{
    //=========================================================================
    // I. DRIVER INITIALIZATION
    //
    //    Initializes the DSCUD library.
    //
    //    Initialize the driver, using the driver version for validation
    //=========================================================================

    if( dscInit( DSC_VERSION ) != DE_NONE )
    {
        dscGetLastError(&errorParams);
        DSCAD_Error(errorParams.errstring, 2);
        return 1;
    }

    //=========================================================================
    // II. BOARD INITIALIZATION
    //
    //     Initialize the DMM board. This function passes the various
    //     hardware parameters to the driver and resets the hardware.
    //
    //=========================================================================

    dsccb.boardtype = DSC_DMM;
    dsccb.base_address = 0x300;
    dsccb.int_level = 3;
    dsccb.dma_level = 3;
    dsccb.clock_freq = 1000000;

    if(dscInitBoard(DSC_DMM, &dsccb, &dscb)!= DE_NONE)
    {
        dscGetLastError(&errorParams);
        DSCAD_Error(errorParams.errstring, 2);
        return 1;
    }

    //=========================================================================
    // III. AD SETTINGS INITIALIZATION
    //
    //      Initialize the structure containing the AD conversion settings and
    //      then pass it to the driver.
    //
    //=========================================================================

    // PRE-FILLED EXAMPLE
    dscadsettings.range = RANGE_5;
    dscadsettings.polarity = UNIPOLAR;
    dscadsettings.gain = GAIN_1;
    dscadsettings.load_cal = (BYTE)TRUE;
    dscadsettings.current_channel = 0;

    if( ( result = dscADSetSettings( dscb, &dscadsettings ) ) != DE_NONE )
    {
        dscGetLastError(&errorParams);
        DSCAD_Error(errorParams.errstring, 2);
        return 2;
    }

    //=========================================================================
    // IV. AD SCAN INITIALIZATION
    //
    //     Initialize the structure containing the AD scan setting and allocate
    //     memory for our buffer containing sample values.
    //
    //=========================================================================

    // PRE-FILLED EXAMPLE
    dscadscan.low_channel = 0;
    dscadscan.high_channel = 15;
    dscadscan.gain = dscadsettings.gain;
    
    samples = (WORD*)malloc( sizeof( WORD ) * ( dscadscan.high_channel - dscadscan.low_channel + 1 ) );
    
    return 0;

}