switchsignal.cpp

PCI开发宝典随书配套光盘

// SwitchSignal.cpp: implementation of the CSwitchSignal class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "SwitchSignal.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
#include"OpenByInterface.h"
#include <winioctl.h>
#include "PCI9052Demoioctl.h"
#include "PCI9052DemoDeviceinterface.h"


#define	IOCTL_INBUF_SIZE	512
#define	IOCTL_OUTBUF_SIZE	512

GUID ClassGuid=PCI9052Demo_CLASS_GUID;

CSwitchSignal::CSwitchSignal()
{
	CString s;
	DWORD	Error;
	hDevice=INVALID_HANDLE_VALUE;
	hDevice = OpenByInterface( &ClassGuid, 0, &Error);
	if (hDevice == INVALID_HANDLE_VALUE)
	{
		
		s.Format("ERROR opening device: (%0x) returned from CreateFile\n", GetLastError());
		AfxMessageBox(s);;
		Exit();
	}

}

CSwitchSignal::~CSwitchSignal()
{
	CloseIfOpen();

}

BOOL CSwitchSignal::CloseIfOpen()
{
    if (hDevice != INVALID_HANDLE_VALUE)
	{
		// Close the handle to the driver
		if (!CloseHandle(hDevice))
		{
			CString s;
			s.Format("ERROR: CloseHandle returns %0x.\n", GetLastError());
			AfxMessageBox(s);
			return FALSE;
		}
		hDevice = INVALID_HANDLE_VALUE;
	}
	return TRUE;
}

BOOL CSwitchSignal::Exit()
{
    CString s;
	s.Format("Exiting...\n\n");
	AfxMessageBox(s);
	if(!CloseIfOpen())
	   return FALSE;
	return TRUE;
}

BOOL CSwitchSignal::CauseUser01ToLow()
{
	CHAR	bufInput[IOCTL_INBUF_SIZE];		// Input to device
	CHAR	bufOutput[IOCTL_OUTBUF_SIZE];	// Output from device
	ULONG	nOutput;						// Count written to bufOutput
	
	
	if (!DeviceIoControl(hDevice,
		PCI9052Demo_IOCTL_800,
		bufInput,
		IOCTL_INBUF_SIZE,
		bufOutput,
		IOCTL_OUTBUF_SIZE,
		&nOutput,
		NULL)
		)
	{
		CString s;
		s.Format("ERROR: DeviceIoControl returns %0x.", GetLastError());
		AfxMessageBox(s);
		
		Exit();
		return FALSE;
	}
	return TRUE;
}

BOOL CSwitchSignal::CauseUser01ToHigh()
{
	CHAR	bufInput[IOCTL_INBUF_SIZE];		// Input to device
	CHAR	bufOutput[IOCTL_OUTBUF_SIZE];	// Output from device
	ULONG	nOutput;						// Count written to bufOutput
	

	
	if (!DeviceIoControl(hDevice,
		PCI9052Demo_IOCTL_801,
		bufInput,
		IOCTL_INBUF_SIZE,
		bufOutput,
		IOCTL_OUTBUF_SIZE,
		&nOutput,
		NULL)
		)
	{
		CString s;
		s.Format("ERROR: DeviceIoControl returns %0x.", GetLastError());
		AfxMessageBox(s);
		Exit();
		return FALSE;
	}
	return TRUE;

}