setup.c

使用NI公司的LabwindowsCVI平台开发虚拟仪器频谱分析仪的源代码

	
	switch (event)
		{
		case EVENT_TIMER_TICK:
			if (bStart)
			{
					SetBreakOnLibraryErrors (0);
				    while((status = DAQ_Monitor (iDevice, iChan2Graph, 1, TransformSize,(short *) plot, &index,
									 &daqStop))==-10802);
	    			NIDAQErrorHandler(status,"DAQ_Monitor", 0);
   					SetBreakOnLibraryErrors (1); 
				
					DeleteGraphPlot (panelHandle, PANEL_FREQGRAPH, -1, VAL_DELAYED_DRAW);
					
					/* DAQ_VScale places the data for your chosen channel into vplot; it first
					   scales the data to the proper voltage levels. */
					DAQ_VScale (iDevice, iChan2Graph, gainVect[iChan2Graph], 1.0, 0.0,
								TransformSize, (short *)(plot), vplot);
					PlotStripChart (panelHandle, PANEL_TIMECHART, vplot, TransformSize, 0,
									0, VAL_DOUBLE);

					/* If the user chose a window, then perform scaling */
					if (iWindow != 9)
					{		
						ScaledWindow (vplot, TransformSize, iWindow, &WinCons);
					}
					
					/* Change to frequency domain, graph, and set the delta X */
					AutoPowerSpectrum (vplot, TransformSize, 1/dDesiredRate, power, &deltaF);
					PlotY (panelHandle, PANEL_FREQGRAPH, power, Resolution, VAL_DOUBLE,
						   VAL_THIN_LINE, VAL_NO_POINT, VAL_SOLID, 1, VAL_GREEN);
				}
				break;
			}
	return 0;
}

//******************************************
// ChangeView - When you change the slider,
// the graph corresponding to the chosen
// channel will appear
//******************************************
int CVICALLBACK ChangeView (int panel, int control, int event,
		void *callbackData, int eventData1, int eventData2)
{
	int x;			// Counting variable
	int b = 0;		// Boolean variable that indicates whether user has chosen valid channel to view
	int old;		// Channel user is currently watching but wants to switch from
	f64 max;
	
	switch (event)
		{
		case EVENT_COMMIT:
			if (bStart)
			{
				old = iChan2Graph;
				GetCtrlVal (panelHandle, PANEL_CHAN2GRAPH, &iChan2Graph);
				
				/* Go through the channels user has chosen to graph */
				for (x=0;x<numChans;x++)
				{
					if (chanVect[x]==iChan2Graph) 	// If user chooses to view a graph being acquired
					{
						b=1;						// Then user has chosen valid channel; exit for loop
						break;
					}
				}
				
				if (b == 0)							// If user chose an invalid channel
				{
					iChan2Graph = old;				//Go back to channel they were viewing
					SetCtrlVal (panelHandle, PANEL_CHAN2GRAPH, chanVect[old]);
				}
				else
				{
					iChan2Graph = x;				// Otherwise change the channel because everything's okay
					
					switch (gainVect[x])			// Also change the y axis of the strip chart
					{
						case -20:
							max = 42.4;
							break;
						case -10:
							max = 31.6;
							break;
						case 0:
							max = 10;
							break;
						case 10:
							max = 3.16;
							break;
						case 20:
							max = 1;
							break;
						case 30:
							max = .316;
							break;
						case 40:
							max = .1;
							break;
						case 50:
							max = .0316;
							break;
						case 60:
							max = .01;
							break;
					}
					SetAxisScalingMode (panelHandle, PANEL_TIMECHART, VAL_LEFT_YAXIS,
										VAL_MANUAL, -max, max);
				}
			}
			break;
		}
	return 0;
}

//******************************************
// ChangeWindow - When user changes the
// window applied to incoming signal, the
// associated variable should change, too.
//******************************************
int CVICALLBACK ChangeWindow (int panel, int control, int event,
		void *callbackData, int eventData1, int eventData2)
{
	switch (event)
		{
		case EVENT_COMMIT:
				GetCtrlVal (panelHandle, PANEL_WINDOW, &iWindow);
			break;
		}
	return 0;
}

//******************************************
// StopAcquire - When you push Stop, the
// program should stop acquisition and reset
// the user interface to either quit or
// start again.
//******************************************
int CVICALLBACK StopAcquire (int panel, int control, int event,
		void *callbackData, int eventData1, int eventData2)
{
	switch (event)
		{
		case EVENT_COMMIT:
			bStart = 0;
			
			/* Stop acquisition */
			DAQ_Clear (iDevice);
			
			/* When stop acquisition, user can change values and start again */
			SetCtrlAttribute (panelHandle, PANEL_START, ATTR_VISIBLE, 1);
			SetCtrlAttribute (panelHandle, PANEL_STOP, ATTR_VISIBLE, 0);
			SetCtrlAttribute (panelHandle, PANEL_QUIT, ATTR_VISIBLE, 1);
			
			/* Undim controls so that user can change them */
			SetCtrlAttribute (panelHandle, PANEL_DEVICE, ATTR_DIMMED, 0);
			SetCtrlAttribute (panelHandle, PANEL_BOARD, ATTR_DIMMED, 0);
			SetCtrlAttribute (panelHandle, PANEL_TRIGGER, ATTR_DIMMED, 0);
			SetCtrlAttribute (panelHandle, PANEL_CHLABEL, ATTR_DIMMED, 0);
			SetCtrlAttribute (panelHandle, PANEL_CH0, ATTR_DIMMED, 0);
			SetCtrlAttribute (panelHandle, PANEL_CH1, ATTR_DIMMED, 0);
			SetCtrlAttribute (panelHandle, PANEL_CH2, ATTR_DIMMED, 0);
			SetCtrlAttribute (panelHandle, PANEL_CH3, ATTR_DIMMED, 0);
			SetCtrlAttribute (panelHandle, PANEL_RANGEDESC, ATTR_DIMMED, 0);
			SetCtrlAttribute (panelHandle, PANEL_RANGE, ATTR_DIMMED, 0); 
			SetCtrlAttribute (panelHandle, PANEL_GAINTITLE, ATTR_DIMMED, 0);
			SetCtrlAttribute (panelHandle, PANEL_GAIN0, ATTR_DIMMED, 0);
			SetCtrlAttribute (panelHandle, PANEL_GAIN1, ATTR_DIMMED, 0);
			SetCtrlAttribute (panelHandle, PANEL_GAIN2, ATTR_DIMMED, 0);
			SetCtrlAttribute (panelHandle, PANEL_GAIN3, ATTR_DIMMED, 0);
			SetCtrlAttribute (panelHandle, PANEL_COUPTITLE, ATTR_DIMMED, 0);
			SetCtrlAttribute (panelHandle, PANEL_COUPLING0, ATTR_DIMMED, 0);
			SetCtrlAttribute (panelHandle, PANEL_COUPLING1, ATTR_DIMMED, 0);
			SetCtrlAttribute (panelHandle, PANEL_COUPLING2, ATTR_DIMMED, 0);
			SetCtrlAttribute (panelHandle, PANEL_COUPLING3, ATTR_DIMMED, 0);
			SetCtrlAttribute (panelHandle, PANEL_RESOLUTION, ATTR_DIMMED, 0);
			break;
		}
	return 0;
}

//******************************************
// QuitProgram - If you choose Quit, then
// shutdown the program.
//******************************************
int CVICALLBACK QuitProgram (int panel, int control, int event,
		void *callbackData, int eventData1, int eventData2)
{
	switch (event)
		{
		case EVENT_COMMIT:
			QuitUserInterface (0);
			break;
		}
	return 0;
}


int CVICALLBACK Adjust4Board (int panel, int control, int event,
		void *callbackData, int eventData1, int eventData2)
{

	switch (event)
		{
		case EVENT_COMMIT:
				board();
		}
	return 0;
}


//*********************************************************
// board - Finds the Board type based on the device number
//*********************************************************
void board(void)
{
	unsigned long type;
	unsigned short choice;		// User's board device number
	
			GetCtrlVal (panelHandle, PANEL_DEVICE, &choice);
			Get_DAQ_Device_Info (choice, ND_DEVICE_TYPE_CODE, &type);
			
			
			/* If user is using a 2 channel input board, then remove the options for
			   the third and fourth channel. */
			   
			   
			   switch (type)			// find the model
					{
					    case 233:
							SetCtrlVal (panelHandle, PANEL_BOARD, "PCI-4451");       
							break;
						case 234:
							SetCtrlVal (panelHandle, PANEL_BOARD, "PCI-4452");       
							break;						
						case 235:
							SetCtrlVal (panelHandle, PANEL_BOARD, "NI-4551");       
							break;
						case 236:
							SetCtrlVal (panelHandle, PANEL_BOARD, "NI-4552");       
							break;
						default:
						 	SetCtrlVal (panelHandle, PANEL_BOARD, "Not DSA Device");            						
					}
					

			switch (type) 
			{
			case 233:
			case 235:
				SetCtrlVal (panelHandle, PANEL_CH2, 0);
				SetCtrlVal (panelHandle, PANEL_CH3, 0);
				
				SetCtrlAttribute (panelHandle, PANEL_CH2, ATTR_VISIBLE, 0);
				SetCtrlAttribute (panelHandle, PANEL_CH3, ATTR_VISIBLE, 0);
				SetCtrlAttribute (panelHandle, PANEL_GAIN2, ATTR_VISIBLE, 0);
				SetCtrlAttribute (panelHandle, PANEL_GAIN3, ATTR_VISIBLE, 0);
				SetCtrlAttribute (panelHandle, PANEL_COUPLING2, ATTR_VISIBLE, 0);
				SetCtrlAttribute (panelHandle, PANEL_COUPLING3, ATTR_VISIBLE, 0);
				break;
			case 234:
			case 236:
				SetCtrlAttribute (panelHandle, PANEL_CH2, ATTR_VISIBLE, 1);
				SetCtrlAttribute (panelHandle, PANEL_CH3, ATTR_VISIBLE, 1);
				SetCtrlAttribute (panelHandle, PANEL_GAIN2, ATTR_VISIBLE, 1);
				SetCtrlAttribute (panelHandle, PANEL_GAIN3, ATTR_VISIBLE, 1);
				SetCtrlAttribute (panelHandle, PANEL_COUPLING2, ATTR_VISIBLE, 1);
				SetCtrlAttribute (panelHandle, PANEL_COUPLING3, ATTR_VISIBLE, 1);
				break;
			default:
				SetCtrlVal (panelHandle, PANEL_CH0, 0); 
				SetCtrlVal (panelHandle, PANEL_CH1, 0); 
				SetCtrlVal (panelHandle, PANEL_CH2, 0);
				SetCtrlVal (panelHandle, PANEL_CH3, 0);
				
				SetCtrlAttribute (panelHandle, PANEL_CH0, ATTR_VISIBLE, 0);
				SetCtrlAttribute (panelHandle, PANEL_CH1, ATTR_VISIBLE, 0);
				SetCtrlAttribute (panelHandle, PANEL_GAIN0, ATTR_VISIBLE, 0);
				SetCtrlAttribute (panelHandle, PANEL_GAIN1, ATTR_VISIBLE, 0);
				SetCtrlAttribute (panelHandle, PANEL_COUPLING0, ATTR_VISIBLE, 0);
				SetCtrlAttribute (panelHandle, PANEL_COUPLING1, ATTR_VISIBLE, 0);
				SetCtrlAttribute (panelHandle, PANEL_CH2, ATTR_VISIBLE, 0);
				SetCtrlAttribute (panelHandle, PANEL_CH3, ATTR_VISIBLE, 0);
				SetCtrlAttribute (panelHandle, PANEL_GAIN2, ATTR_VISIBLE, 0);
				SetCtrlAttribute (panelHandle, PANEL_GAIN3, ATTR_VISIBLE, 0);
				SetCtrlAttribute (panelHandle, PANEL_COUPLING2, ATTR_VISIBLE, 0);
				SetCtrlAttribute (panelHandle, PANEL_COUPLING3, ATTR_VISIBLE, 0);
			}
			
}