daqndemo.c

CVI教程,用于信号采集系统的多任务开发软件.学习简单,功能实用.

/*  The example program demonstrates the use of a DAQ Numeric control.
    A DAQ Numeric is a control which can be configured to automatically
    read its value in from or write its value out to an analog I/O channel.
    
    This program uses the daq_num.fp instrument driver to create the
    DAQ Numeric controls.
*/  

#include <cvirte.h>    /* Needed if linking in external compiler; harmless otherwise */
#include <userint.h>
#include "daq_num.h"
#include "daqndemo.h"

int thePanel;


int main (int argc, char *argv[])
{
    if (InitCVIRTE (0, argv, 0) == 0)    /* Needed if linking in external compiler; harmless otherwise */
        return -1;    /* out of memory */
    
    thePanel = LoadPanel (0, "daqndemo.uir", PANEL);
    DAQ_Numeric_ConvertFromNumeric (thePanel, PANEL_NUMERICMETER, "Meter Configuration");
    DAQ_Numeric_ConvertFromNumeric (thePanel, PANEL_NUMERICDIAL, "Dial Configuration");

    DisplayPanel (thePanel);
    RunUserInterface ();

    DiscardPanel (thePanel);
    return 0;
}


    /*  This function does nothing in this demo.  It is here to illustrate where you can
        place code to perform an action each time a DAQ Numeric updates its value when in input mode.
    */  
int CVICALLBACK MeterCallback (int panel, int control, int event,
        void *callbackData, int eventData1, int eventData2)
{
    switch (event)
        {
        case EVENT_DAQ_NUMERIC_DATA_READY:
            /*  this is where to place code that should take an action each time the meter reads a
                new value.  The value read is in *(double *)eventData1, and the easy I/O result code 
                is in eventData2.  The result code will be negative if a DAQ error occurred.
            */
            break;
        }
    return 0;
}


int CVICALLBACK QuitCallback (int panel, int control, int event,
        void *callbackData, int eventData1, int eventData2)
{
    switch (event)
        {
        case EVENT_COMMIT:
            QuitUserInterface (0);      /* the quit button was pressed, exit RunUserInterface() */
            break;
        }
    return 0;
}


    /* This function displays information about the program when the help button is pressed */
int CVICALLBACK HelpCallback (int panel, int control, int event, void *callbackData, int eventData1, int eventData2) 
{
    int helpPanel;
    
    switch (event) 
        {
        case EVENT_COMMIT:
            helpPanel = LoadPanel(0, "daqndemo.uir", HELP_PANEL);
            InstallPopup(helpPanel);
            GetUserEvent(1, 0,0);   /* wait for OK button (it is the only control on the panel) */
            DiscardPanel(helpPanel);
            break;
        }
    return 0;
}