mydriver.cpp

一个基于wince潜入式平台的设备下的usb的驱动程序

// MyDriver.cpp : Defines the entry point for the DLL application.
//

#include "stdafx.h"

DWORD DEM_Init(LPCTSTR pContext, LPCVOID lpvBusContext);
BOOL DEM_Deinit( DWORD hDeviceContext );
DWORD DEM_Open( DWORD hDeviceContext, DWORD AccessCode, DWORD ShareMode );
BOOL DEM_Close( DWORD hOpenContext );
BOOL DEM_IOControl( DWORD hOpenContext, DWORD dwCode, PBYTE pBufIn, DWORD dwLenIn, PBYTE pBufOut, DWORD dwLenOut, PDWORD pdwActualOut );
void DEM_PowerUp( DWORD hDeviceContext );
void DEM_PowerDown( DWORD hDeviceContext );
DWORD DEM_Read( DWORD hOpenContext, LPVOID pBuffer, DWORD Count );
DWORD DEM_Write( DWORD hOpenContext, LPCVOID pBuffer, DWORD Count );
DWORD DEM_Seek( DWORD hOpenContext, long Amount, WORD Type );

#define IOCTL_DRIVER_DEMO   42

// Not exposed by the Device Driver 
void DBGOut(DWORD dwValue);

HANDLE hMem=NULL;
DWORD dwCount;

BOOL APIENTRY DllMain( HANDLE hModule, 
					  DWORD  ul_reason_for_call, 
					  LPVOID lpReserved
					  )
{
	switch ( ul_reason_for_call )
	{
	case DLL_PROCESS_ATTACH:
		OutputDebugString(L"MyDriver - DLL_PROCESS_ATTACH\n");
		break;
	case DLL_PROCESS_DETACH:
		OutputDebugString(L"MyDriver - DLL_PROCESS_DETACH\n");
		break;
	case DLL_THREAD_ATTACH:
		OutputDebugString(L"MyDriver - DLL_THREAD_ATTACH\n");
		break;
	case DLL_THREAD_DETACH:
		OutputDebugString(L"MyDriver - DLL_THREAD_DETACH\n");
		break;
	}
	return TRUE;
}

DWORD DEM_Init( LPCTSTR pContext, LPCVOID lpvBusContext)
{
	OutputDebugString(L"MyDriver - DEM_Init - Context: ");
	OutputDebugString(pContext);
	OutputDebugString(L"\n");
	
	OutputDebugString(L"MyDriver - ~ DEM_Init\n");
	return 0x1234;
}

BOOL DEM_Deinit( DWORD hDeviceContext )
{
	OutputDebugString(L"MyDriver - DEM_Deinit\n");
	
	OutputDebugString(L"MyDriver - ~ DEM_Deinit\n");
	return TRUE;
}

DWORD DEM_Open( DWORD hDeviceContext, DWORD AccessCode, DWORD ShareMode )
{
	OutputDebugString(L"MyDriver - DEM_Open\n");
	OutputDebugString(L"hDeviceContext - ");
	DBGOut(hDeviceContext);
	OutputDebugString(L"\n");
	
	OutputDebugString(L"MyDriver - ~ DEM_Open\n");
	return 0x5678;
}

BOOL DEM_Close( DWORD hOpenContext )
{
	OutputDebugString(L"MyDriver - DEM_Close\n");
	OutputDebugString(L"hOpenContext - ");
	DBGOut(hOpenContext);
	OutputDebugString(L"\n");
	
	OutputDebugString(L"MyDriver - ~ DEM_Close\n");
	
	return TRUE;
}

BOOL DEM_IOControl( DWORD hOpenContext, DWORD dwCode, PBYTE pBufIn, DWORD dwLenIn, PBYTE pBufOut, DWORD dwLenOut, PDWORD pdwActualOut )
{
	OutputDebugString(L"MyDriver - DEM_IOControl\n");
	OutputDebugString(L"hOpenContext - ");
	DBGOut(hOpenContext);
	OutputDebugString(L"\n");
	
	switch (dwCode) {
	case IOCTL_DRIVER_DEMO:
		{
			OutputDebugString(L"DRIVER DEMO IOCTL...\n");
			// reverse the string...
			HANDLE hTemp=LocalAlloc(LPTR,dwLenIn+1);
			memset(hTemp,0x00,dwLenIn+1);
			TCHAR *tcOut=(TCHAR*)hTemp;
			TCHAR *tcIn=(TCHAR*)pBufIn;
			DWORD dwChars=dwLenIn/2;
			for (DWORD x=0;x < dwChars;x++) {
				tcOut[x]=tcIn[dwChars-x-1];
			}
			memcpy(pBufOut,hTemp,dwLenIn);
			LocalFree(hTemp);
			*pdwActualOut=dwLenIn;
		}
		break;
	default:
		OutputDebugString(L"Unknown IOCTL\n");
		break;
	}
	
	OutputDebugString(L"MyDriver - ~ DEM_IOControl\n");
	return TRUE;
}

void DEM_PowerUp( DWORD hDeviceContext )
{
	OutputDebugString(L"MyDriver - DEM_PowerUp\n");
	OutputDebugString(L"hDeviceContext - ");
	DBGOut(hDeviceContext);
	OutputDebugString(L"\n");
	
	OutputDebugString(L"MyDriver - ~ DEM_PowerUp\n");
}

void DEM_PowerDown( DWORD hDeviceContext )
{
	OutputDebugString(L"MyDriver - DEM_PowerDown\n");
	OutputDebugString(L"hDeviceContext - ");
	DBGOut(hDeviceContext);
	OutputDebugString(L"\n");
	
	OutputDebugString(L"MyDriver - ~ DEM_PowerDown\n");
}

DWORD DEM_Read( DWORD hOpenContext, LPVOID pBuffer, DWORD Count )
{
	DWORD dwRetCount=0xffff;      // default to error
	OutputDebugString(L"MyDriver - DEM_Read\n");
	OutputDebugString(L"hOpenContext - ");
	DBGOut(hOpenContext);
	OutputDebugString(L"\n");
	if (NULL != hMem) {
		dwRetCount=dwCount;
		memcpy(pBuffer,hMem,dwCount);
	}
	OutputDebugString(L"MyDriver - ~ DEM_Read\n");
	
	return dwRetCount;
}

DWORD DEM_Write( DWORD hOpenContext, LPCVOID pBuffer, DWORD Count )
{
	OutputDebugString(L"MyDriver - DEM_Write\n");
	OutputDebugString(L"hOpenContext - ");
	DBGOut(hOpenContext);
	OutputDebugString(L"\n");
	
	if (NULL != hMem) {
		LocalFree(hMem);
	}
	
	hMem=LocalAlloc(LPTR,Count);
	memcpy(hMem,pBuffer,Count);
	dwCount=Count;
	
	OutputDebugString(L"MyDriver - ~ DEM_Write\n");
	
	return Count;
}

DWORD DEM_Seek( DWORD hOpenContext, long Amount, WORD Type )
{
	OutputDebugString(L"MyDriver - DEM_Seek\n");
	OutputDebugString(L"hOpenContext - ");
	DBGOut(hOpenContext);
	OutputDebugString(L"\n");
	
	OutputDebugString(L"MyDriver - ~ DEM_Seek\n");
	
	return 0;
}


void DBGOut(DWORD dwValue)
{
	TCHAR tcTemp[10];
	wsprintf(tcTemp,L"%ld",dwValue);
	OutputDebugString(tcTemp);
}