pulse.cpp

16 relay output channels and 16 isolated digital input channels LED indicators to show activated

/*
 ****************************************************************************************
 * Program        : PULSE.CPP                                                           *
 * Description    : Demo program for pulse output function                              *
 * Boards Supp.   :                                                                     *
 * APIs used      : DRV_DeviceOpen,DRV_DeviceClose, DRV_GetErrorMessage,                *
 *                  DRV_CounterReset, DRV_CounterPulseStart                             *
 * Revision       : 1.00                                                                *
 * Date           : 7/8/1999                   Advantech Co., Ltd.                      *
 ****************************************************************************************
 */
#include <windows.h>
#include <windef.h>
#include <stdio.h>
#include <conio.h>

#define WIN_CONSOLE
#include "..\..\..\include\driver.h"

/******************************
 * Local function declaration *
 ******************************/
void ErrorHandler(DWORD dwErrCde);
void ErrorStop(long*, DWORD);

void main()
{
    DWORD  dwErrCde;
    ULONG  lDevNum;
    long   lDriverHandle;
    USHORT usChan;
	float  period;
	float  freq;
	PT_CounterPulseStart ptCounterPulseStart;

    //Step 1: Display hardware and software settings for running this example
    printf("Before running this example, please\n");
    printf("use the device installation utility to add the device.\n");

    //Step 2: Input parameters
    printf("\nPlease input parameters:");
    printf("\nDevice Number (check the device installation utility): ");
    scanf("%d", &lDevNum);
    printf("\nOutput Channel: ");
    scanf("\n%d", &usChan);
	printf("\nFrequency:");
	scanf("%f", &freq);

    period = 1/freq;
    //Step 3: Open device
    dwErrCde = DRV_DeviceOpen(lDevNum, &lDriverHandle);   
    if (dwErrCde != SUCCESS)
    {
        ErrorHandler(dwErrCde);
        printf("Program terminated!\n");

        printf("Press any key to exit....");
        getch();
        exit(1);
    }

    // Step 4: Reset counter by DRV_CounterReset
	//dwErrCde = DRV_CounterReset(lDriverHandle, usChan);
		
    // Step 5: Start counter operation by DRV_CounterPulseStart
    ptCounterPulseStart.counter  = usChan;        // pulse output channel
    ptCounterPulseStart.period   = period; // period in second
    ptCounterPulseStart.UpCycle  = (float)period/2;// up cycle time in second
    ptCounterPulseStart.GateMode = 0;             // not used

    dwErrCde = DRV_CounterPulseStart(lDriverHandle, &ptCounterPulseStart);
    if (dwErrCde != SUCCESS)
    {
       ErrorStop(&lDriverHandle, dwErrCde);
       return;
    }

    // Step 6: exit while pressing any key
    printf("\nPress any key to exit....");
    getch();

    // Step 7: Stop pulse output by DRV_CounterReset
	dwErrCde = DRV_CounterReset(lDriverHandle, usChan);

    // Step 8: Close device
    dwErrCde = DRV_DeviceClose(&lDriverHandle);
}//main

/**********************************************************************
 * Function: ErrorHandler
 *           Show the error message for the corresponding error code
 * input:    dwErrCde, IN, Error code
 * return:   none
 **********************************************************************/
void ErrorHandler(DWORD dwErrCde)
{
    char szErrMsg[180];

    DRV_GetErrorMessage(dwErrCde, szErrMsg);
    printf("\nError(%d): %s\n", dwErrCde & 0xffff, szErrMsg);
}//ErrorHandler

/**********************************************************************
 * Function:   ErrorStop
 *             Release all resource and terminate program if error occurs 
 * Paramaters: pDrvHandle, IN/OUT, pointer to Driver handle
 *             dwErrCde, IN, Error code.
 * return:     none             
 **********************************************************************/
void ErrorStop(long *pDrvHandle, DWORD dwErrCde)
{
    //Error message 
    ErrorHandler(dwErrCde);
    printf("Program terminated!\n");
    
    //Close device
    DRV_DeviceClose(pDrvHandle);

    printf("Press any key to exit....");
    getch();
    exit(1);
}//ErrorStop