chartdem.c

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/*  The example program demonstrates the use of a DAQ Chart control.
    A DAQ Chart control is a strip chart which can be configured to 
    automatically acquire and display data, log the data in a history 
    buffer, and signal alarm conditions.  
    
    This program uses the daqchart.fp instrument driver to create the
    DAQ Chart control.
*/    

#include <cvirte.h>    /* Needed if linking in external compiler; harmless otherwise */
#include <utility.h>
#include <ansi_c.h>
#include <userint.h>
#include "daqchart.h"
#include "daq_num.h"
#include "chartdem.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, "chartdem.uir", PANEL);
    
        /* Create the DAQ Chart */
    DAQ_Chart_ConvertFromStripChart (thePanel, PANEL_CHART, "Demo Configuration");
    
        /* Create the DAQ numeric knob */
    DAQ_Numeric_ConvertFromNumeric (thePanel, PANEL_NUMERICDIAL, "Demo Configuration");
    DisplayPanel (thePanel);

    RunUserInterface ();

    DiscardPanel (thePanel);
    return 0;
}


int CVICALLBACK QuitCallback (int panel, int control, int event, void *callbackData, int eventData1, int eventData2)
{
    switch (event) {
        case EVENT_COMMIT:
            QuitUserInterface (0);
            break;
    }
    return 0;
}


    /*  This is the callback for the DAQ Chart control.  This callback is sent events when 
        alarm conditions are detected.
    */      
int CVICALLBACK DAQChartCallback (int panel, int control, int event, void *callbackData, int eventData1, int eventData2)
{
    char    alarmMsg[256];
    int     logAlarms;

    switch (event)
        {
        case EVENT_DAQ_CHART_DATA_READY:
            /*  This event is sent each time a scan is processed by the chart.  (float *)eventData1 is a pointer to the acquired scan. */
            /*  This demo program does not use this event... */
            break;
        case EVENT_DAQ_CHART_ALARM_ON:
        case EVENT_DAQ_CHART_ALARM_OFF:
            GetCtrlVal(panel, PANEL_LOG_ALARMS, &logAlarms);
            if (logAlarms)
                {
                sprintf(alarmMsg,"ALARM '%s' %s. Value = %.2f, Time = %.2f\n",
                    (char *)eventData1, event == EVENT_DAQ_CHART_ALARM_ON ? "ON" : "OFF",
                    *(double *)eventData2, Timer());
                SetCtrlVal(panel, PANEL_ALARMLOG, alarmMsg);
                }
            break;
        }

Error:
    return 0;
}


    /*  This function is called periodically by a timer control to update the history buffer display */
int CVICALLBACK GraphUpdateCallback (int panel, int control, int event, void *callbackData, int eventData1, int eventData2)
{
    int     plotHistory;
    int     plotVsTime;
    int     numScansToPlot;

    switch (event)
        {
        case EVENT_TIMER_TICK:
            GetCtrlVal(panel, PANEL_PLOT, &plotHistory);
            
            if (plotHistory)
                {
                GetCtrlVal(thePanel, PANEL_PLOT_VS_TIME, &plotVsTime);
                GetCtrlVal(thePanel, PANEL_NUMSCANSTOPLOT, &numScansToPlot);
                DAQ_Chart_PlotHistory(thePanel, PANEL_CHART, panel, PANEL_GRAPH, plotVsTime, 
                                        numScansToPlot, 1, 1, 0, 1);
                }
            break;
        }
    return 0;
}

    
    /*  This function responds to the user's choice of a new history graph update rate 
        from the GRAPH_RATE ring control */
int CVICALLBACK GraphRateCallback (int panel, int control, int event, void *callbackData, int eventData1, int eventData2)
{
    double  rate;
    
    switch (event)
        {
        case EVENT_COMMIT:
            GetCtrlVal(panel, control, &rate);
            SetCtrlAttribute(thePanel, PANEL_GRAPH_TIMER, ATTR_INTERVAL, 1/rate);
            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, "chartdem.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;
}

    /* This function set the graph's X-Axis label to match the setting on the binary switch */
int CVICALLBACK PlotTypeCallback (int panel, int control, int event,
        void *callbackData, int eventData1, int eventData2)
{
    int plotVsTime;
    
    switch (event)
        {
        case EVENT_COMMIT:
            GetCtrlVal(panel, PANEL_PLOT_VS_TIME, &plotVsTime);
            if (plotVsTime)
                SetCtrlAttribute(thePanel, PANEL_GRAPH, ATTR_XNAME, "Time (Seconds)");
            else                
                SetCtrlAttribute(thePanel, PANEL_GRAPH, ATTR_XNAME, "Scan");
            break;
        }
    return 0;
}