利用windriver 开发了个usb的驱动,写个开发心得

OsEventSignal(pDrvCtx->hDeviceUnusedEvent); BZERO(eventTable);

eventTable.pfDeviceAttach = DeviceAttach; eventTable.pfDeviceDetach = DeviceDetach; eventTable.pUserData = pDrvCtx;

dwError = WDU_Init(&hDriver, pMatchTables, dwNumMatchTables, &eventTable, sLicense, WD_ACKNOWLEDGE); if (dwError) {

ERR(\failed to initialize USB driver: error 0x%lx \ \dwError, Stat2Str(dwError)); return dwError; }

return WD_STATUS_SUCCESS; }

VOID DriverUninit(DRIVER_CONTEXT *pDrvCtx) {

DEVICE_CONTEXT *pCur, *pTmpDev;

if (pDrvCtx->hEvent)

OsEventClose(pDrvCtx->hEvent); if (pDrvCtx->hMutex)

OsMutexClose(pDrvCtx->hMutex); if (pDrvCtx->hDeviceUnusedEvent)

OsEventClose(pDrvCtx->hDeviceUnusedEvent);

if (hDriver)

WDU_Uninit(hDriver);

/* Release any remaining devices */ pCur = pDrvCtx->deviceContextList; while (pCur) {

pTmpDev = pCur; pCur = pCur->pNext; free(pTmpDev); } }

DWORD OpenUsbDevice( void) {

DWORD dwError; WORD wVendorId = 0; WORD wProductId = 0;

WDU_MATCH_TABLE matchTable;

BZERO(DrvCtx);

wVendorId = USE_DEFAULT; wProductId = USE_DEFAULT;

/* use defaults */

if (wVendorId == USE_DEFAULT) wVendorId = DEFAULT_VENDOR_ID;

if (wProductId == USE_DEFAULT) wProductId = DEFAULT_PRODUCT_ID; BZERO(matchTable);

matchTable.wVendorId = wVendorId; matchTable.wProductId = wProductId;

dwError = DriverInit(&matchTable, 1, DEFAULT_DRIVER_NAME, DEFAULT_LICENSE_STRING, &DrvCtx); if (dwError) {

goto Exit; }

/* Wait for the device to be attached */

dwError = OsEventWait(DrvCtx.hEvent, ATTACH_EVENT_TIMEOUT); if (dwError) {

if (dwError==WD_TIME_OUT_EXPIRED) {

ERR(\expired for connection with the device.\\n\ \that the device is connected and try again.\\n\ } else {

ERR(\OsEventWait() failed on event 0x%p: error 0x%lx \ \DrvCtx.hEvent, dwError, Stat2Str(dwError)); }

goto Exit; }

OsMutexLock(DrvCtx.hMutex); if (!DrvCtx.dwDeviceCount) {

OsMutexUnlock(DrvCtx.hMutex); return 1; }

OsMutexUnlock(DrvCtx.hMutex);

if (!DrvCtx.pActiveDev)

DrvCtx.pActiveDev = DrvCtx.deviceContextList;

OsEventReset(DrvCtx.hDeviceUnusedEvent);

return 0 ; Exit:

DriverUninit(&DrvCtx); return dwError; }

void CloseUsbDevice( void) {

DriverUninit(&DrvCtx); }

DWORD UsbRead(char *pBuffer , DWORD dwBufferSize , PDWORD pdwBytesTransferred) {

DWORD dwError ;

WDU_DEVICE_HANDLE hDevice;

OsMutexLock(DrvCtx.hMutex);

hDevice = DrvCtx.pActiveDev->hDevice; OsMutexUnlock(DrvCtx.hMutex);

dwError = WDU_TransferBulk(hDevice, 0x81,TRUE, 0, pBuffer, dwBufferSize, pdwBytesTransferred, TRANSFER_TIMEOUT);

return dwError ; }

3.驱动程序的发布：

这个也比较简单，请参考自带文档usb manual 的11章节，其实就是用到了他的一个wdreg工具，我写了个批处理文件，想安装的直接点批处理即可！

windriver开发驱动是比较方便，至于稳定性，现在正在测试，看来比较稳定！速度方面500kB是没问题！

不过速度方面pc驱动固然有影响，device的firmware影响也是很大的，特别是双缓冲的ep，处理不当速度很难上去！