sample12_2.c

CVI例程

#include <utility.h>
#include <ansi_c.h>
#include <rs232.h>
#include <cvirte.h>		/* Needed if linking in external compiler; harmless otherwise */
#include <userint.h>
#include "sample12_2.h"
#include <visa.h>

static int panelHandle;
ViSession vm,vi;
char buf[256];
void CVICALLBACK RSCallbackF (int portNo,int eventMask,
                   void *callbackData)
{  
	int i=0;
	double temp=31.5,pressure=10515.0;
	if(eventMask== LWRS_RXFLAG)
	{
		ComRdTerm (1, buf, 15, '\010');
		while(buf[i]!='?')  i++;
		buf[i+1]='\0';
		if(strcmp(buf,"*TEMPRETURE?")==0) 
			sprintf(buf,"%10.3f\n",temp);
		if(strcmp(buf,"*PRESSURE?")==0)   
			sprintf(buf,"%10.3f\n",pressure);
		if(strcmp(buf,"*IDN?")==0)		 strcpy(buf,"RS232\n")	;
		
		ComWrt (1, buf, strlen(buf)); 
	}
};

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 */
		
	if ((panelHandle = LoadPanel (0, "sample12_2.uir", PANEL)) < 0)
		return -1;
	DisplayPanel (panelHandle);
	RunUserInterface ();  
	CloseCom (1);  
	return 0;
}

int CVICALLBACK Start (int panel, int control, int event,
		void *callbackData, int eventData1, int eventData2)
{
	int poweron;
	switch (event)
	{
		case EVENT_COMMIT:
			GetCtrlVal (panelHandle, PANEL_TOGGLEBUTTON, &poweron);
			if(poweron)
			{
				OpenComConfig (1, "COM2", 9600, 0, 8, 1, 512, 512);
				SetComTime (1, 1.0);
				InstallComCallback (1, LWRS_RXFLAG, 1, '*',RSCallbackF, 0);
			}				
			else
			{
				InstallComCallback (1, LWRS_RXFLAG, 1, '*', 0, 0); 
				CloseCom (1);  
			}
		break;
	}
	return 0;
}

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