Adding a new driver in WinCE

Here is a short guide on how to create your very own driver in Windows CE:

•  In solution explorer, go to C:\WINCE800\platform\${whatever board}\SRC\DRIVERS
• right click driver and press "Add"->"New subproject..."
• Select WCE Dynamic Link library and empty project.
• Add the following in ${drivername}.bib:

MODULES

IF BSP_DRIVERSHELL
IF _WINCEOSVER=600
    ${drivername}.dll $(_FLATRELEASEDIR)\${drivername}.dll NK K
ELSE
    ${drivername}.dll $(_FLATRELEASEDIR)\${drivername}.dll NK
ENDIF
ENDIF

• Add the following in ${drivername}.reg:

[HKEY_LOCAL_MACHINE\Drivers\BuiltIn\${drivername}]
    "Prefix"="XXX"
    "Dll"="${drivername}.dll"
    "Order"=dword:4

• Add the following in ${drivername}.def:

LIBRARY ${drivername}

EXPORTS
    XXX_Init
    XXX_Deinit
    XXX_Read
    XXX_Open
    XXX_Close
    XXX_IOControl

Note that XXX should be fixed to 3 letters. The functions defined should match the functions in cpp file

• Add the following in ${drivername}.cpp:

#include <stdAfx.h>
#include <windows.h>
#include <devload.h>
#include "bsp.h"

extern "C"
BOOL WINAPI DllMain(HANDLE hInstDll, DWORD dwReason, LPVOID lpvReserved)
{

UNREFERENCED_PARAMETER(lpvReserved);
    switch (dwReason) {
        case DLL_PROCESS_ATTACH:

            DEBUGREGISTER((HMODULE)hInstDll);

            DisableThreadLibraryCalls((HMODULE)hInstDll);

        break;

        case DLL_PROCESS_DETACH:

        break;

  }
    return TRUE;
}

DWORD XXX_Init(LPCTSTR pContext)
{
    return 1;
}

DWORD XXX_Read(DWORD hOpenContext, LPVOID pBuffer, DWORD Count)
{
    return 0;
}

BOOL XXX_Deinit(DWORD hDeviceContext)
{
    return TRUE;
}

DWORD XXX_Open(DWORD hDeviceContext, DWORD AccessCode, DWORD ShareMode)
{
    return 1;
}

BOOL XXX_Close(DWORD hOpenContext)
{
    return TRUE;
}

BOOL XXX_IOControl(DWORD hOpenContext, DWORD dwCode, PBYTE pBufIn, 

    DWORD dwLenIn, PBYTE pBufOut, DWORD dwLenOut, PDWORD pdwActualOut)
{
    return TRUE;
}

• In Drivers\dir, add the DLL project name
• In C:\WINCE800\platform\${whatever board}\FILES\platform.reg, Add the follwong line:
•  #include "$(_winceroot)\platform\${whatever board}SRC\DRIVERS\USBMANAGER\${drivername}.reg"
• In C:\WINCE800\platform\${whatever board}\FILES\platform.bib, Add the following line:
• ${drivername}.dll $(_FLATRELEASEDIR)\${drivername}.dll
• Try building the driver alone first for some minor bugs that might apear.
• Build everything and the driver should work.