Wince5.0 流驱动创建全程 (经典中的经典)

使用Platform Builder5.0创建Wince5.0的流驱动相当简单，你只需要编写一个修改3个文件，.c,.bib,.reg. 详细步骤如下：

1.用PB5.0创建一个动态链接库（DLL）工程，取名为MyDriver，在第二步选择“A Simple DLL Project".

2.在工程中添加源文件MyDriver.cpp.

 

#include<windows.h>#include<tchar.h>#define BUFSIZE 256WCHAR achBuffer[BUFSIZE];BOOL WINAPI DllEntry(HANDLE hinstDLL,DWORD deReason,LPVOID lpvReserved){    switch(deReason)    {    case DLL_PROCESS_ATTACH:        RETAILMSG(1,(TEXT("STRINGS:DLL_PROCESS_ATTACH\n")));        return TRUE;    case DLL_THREAD_ATTACH:        RETAILMSG(1,(TEXT("STRINGS:DLL_THEARD_ATTACH\n")));        return TRUE;    case DLL_PROCESS_DETACH:        RETAILMSG(1,(TEXT("STRINGS:DLL_PROCESS_DETACH\n")));        return TRUE;    case DLL_THREAD_DETACH:        RETAILMSG(1,(TEXT("STRINGS:DLL_THEARD_DETACH\n")));        return TRUE;#ifdef UNDER_CE    case DLL_PROCESS_EXITING:        RETAILMSG(1,(TEXT("STRINGS:DLL_PROCESS_EXITING\n")));        break;    case DLL_SYSTEM_STARTED:        RETAILMSG(1,(TEXT("STRINGS:DLL_SYSTEM_STARTED\n")));        break;#endif    }    return TRUE;}//-----------------------------------------------DWORD STR_Init(DWORD dwContext){    DWORD dwRet=0;    RETAILMSG(1,(TEXT("MYSTRINGS:STR_Init\n")));    memset(achBuffer,0,BUFSIZE*sizeof(WCHAR));    dwRet=1;    return dwRet;}//--------------------------------------------BOOL STR_Deinit(DWORD hDeviceContext){    BOOL bRet=TRUE;    RETAILMSG(1,(TEXT("MYSTRINGS:STR_Deinit\n")));    return bRet;}//--------------------------------------------DWORD STR_Open(DWORD hDeviceContext,DWORD AccessCode,DWORD SharMode){    //DWORD bwRet=0;    RETAILMSG(1,(TEXT("MYSTRINGS:STR_Open\n")));    return 1;}//--------------------------------------------BOOL STR_Close(DWORD hDeviceContext){    RETAILMSG(1,(TEXT("MYSTRINGS:STR_Close\n")));    return TRUE;}//--------------------------------------------BOOL STR_IOControl(DWORD hOpenContext,                    DWORD dwCode,                    PBYTE pBufIn,                    DWORD dwLenIn,                    PBYTE pBufOut, DWORD dwLenOut, PDWORD pdwActualOut){    RETAILMSG(1,(TEXT("MYSTRINGS:STR_IOControl\n")));    return TRUE;}//--------------------------------------------void STR_PowerDown(DWORD hDeviceContext){    RETAILMSG(1,(TEXT("MYSTRINGS:STR_PowerDown\n")));}//--------------------------------------------void STR_PowerUp(DWORD hDeviceContext){    RETAILMSG(1,(TEXT("MYSTRINGS:STR_PowerUp\n")));}//--------------------------------------------DWORD STR_Read(DWORD hOpenContext, LPVOID pBuffer, DWORD Count){    DWORD dwRet=0;    RETAILMSG(1,(TEXT("MYSTRINGS:STR_Read\n")));    DWORD cbBuffer=wcslen(achBuffer);    dwRet=min(cbBuffer,Count);    wcsncpy((LPWSTR)pBuffer,achBuffer,dwRet);    return dwRet;}//--------------------------------------------DWORD STR_Seek(DWORD hOpenContext, long Amount,DWORD Type){    DWORD dwRet=0;    RETAILMSG(1,(TEXT("MYSTRINGS:STR_Seek\n")));    return dwRet;}//--------------------------------------------DWORD STR_Write(DWORD hOpenContext, LPCVOID pSourceBytes, DWORD NumberOfBytes){    DWORD dwRet=0;    RETAILMSG(1,(TEXT("MYSTRINGS:STR_Write\n")));    //DWORD cbBuffer=wcslen(achBuffer);    dwRet=min(BUFSIZE,NumberOfBytes);    wcsncpy(achBuffer,(LPWSTR)pSourceBytes,dwRet);    return dwRet;}

3.打开PB5.0为你自动创建的MyDriver.reg文件，输入以下内容并保存

[HKEY_LOCAL_MACHINE\Drivers\BuiltIn\STRING]
"Index"=dword:1
"Prefix"="STR"
"Dll"="MyDriver.dll"
"Order"=dword:0

4.修改MyDriver.def文件

LIBRARY MyDriver

EXPORTS
    STR_Init
    STR_Deinit
    STR_Open
    STR_Close
    STR_Read
    STR_Write
    STR_Seek
    STR_IOControl
    STR_PowerDown
    STR_PowerUp

PB5.0在你创建工程的时候已经为你自动编写好了source和Makefile文件，现在需要做的就是点击Sysgen进行编译。然后连接模拟器，系统启动后，会在debug窗口找到以下内容:

 STRINGS:DLL_PROCESS_ATTACH,MYSTRINGS:STR_Init

这说明系统已经加载了MyDriver.dll驱动并调用STR_Init函数初始化设备。

5.编写应用程序测试

在pb下新建一个WCE Application（test_MyDriver)工程，编写简单的测试程序如下：

 

// test_MyDriver.cpp : Defines the entry point for the application.//#include "stdafx.h"int WINAPI WinMain(HINSTANCE hInstance,                     HINSTANCE hPrevInstance,                     LPTSTR     lpCmdLine,                     int       nCmdShow){// Open the STRINGS driver with READ and WRITE access    HANDLE hStr = CreateFile(TEXT("STR1:"), GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, 0);    if (INVALID_HANDLE_VALUE == hStr)    {        MessageBox(NULL, _T("Cannot open STR1:"), _T("StringApp"), MB_OK);        return 0;    }    MessageBox(NULL, TEXT("What"), TEXT("StringApp"), MB_OK);    // Disconnect from driver.    CloseHandle(hStr);    return 0;}

编译后在wince的windows目录下会找到test_MyDriver.exe文件，双击该文件，会在debug窗口发现以下内容：

MYSTRINGS:STR_Open，MYSTRINGS:STR_Close

说明应用程序已经成功调用了MyDriver驱动程序。