利用windriver 开发了个usb的驱动，写个开发心得
项目组需要利用2440采集数字电视的采样数据，所以让我开发一个usb的数据采集系统，就两个要求 1 速度要达到500kbyte/s以上 2 稳定
由于之前没有做过windows驱动的经验，所以花了3，4天时间读了读ddk的文档，期间还上chinapub找个本书，读了免费的第1章，按照他配置了vc的 编译环境，呵呵。
然后就吧ddk下面的bulkusb源代码进行了修改，写好usb device的驱动，有些了个应用程序，测试一下，采集数据是ok了，但是发现有时候蓝屏，特别是采集100m左右，就会出现蓝品！这下没办法了，由于我本身就对windows内核编程不熟悉，有调试了大概3，4天确认问题可能处在电源管理方面，联系到自己对这方面不是很熟悉，而且时间紧迫，没办法转向windriver开发 ！我安装的是9.21版本（请到迅雷下载）。
1. 驱动的开发：
a 这步开发比较简单，首先确认你的device固件正确能枚举成功，然后将device连接到pc usb host 端。
b 按照向导指引刷出你的设备进行配置，然后点击编译按钮生成代码。这部分内容请参考安装文档的快速开发向导！ 2.应用程序开发：
最主要的几个函数是，opendevice 和readwrite 函数：其实大家只要摘录向导生成代码的内容即可，这里贴一个我的
static WDU_DRIVER_HANDLE hDriver = 0;
static DRIVER_CONTEXT DrvCtx ;
static BOOL DLLCALLCONV DeviceAttach(WDU_DEVICE_HANDLE hDevice,
WDU_DEVICE *pDeviceInfo, PVOID pUserData) {
DRIVER_CONTEXT *pDrvCtx = (DRIVER_CONTEXT *)pUserData; DEVICE_CONTEXT *pDevCtx, **ppDevCtx;
DWORD dwInterfaceNum = pDeviceInfo->pActiveInterface[0]->pActiveAltSetting->Descriptor.bInterfaceNumber;
DWORD dwAlternateSetting = pDeviceInfo->pActiveInterface[0]->pActiveAltSetting->Descriptor.bAlternateSetting;
TRACE(\received and accepted attach for vendor id 0x%x, \ \id 0x%x, interface %ld, device handle 0x%p\\n\
pDeviceInfo->Descriptor.idVendor, pDeviceInfo->Descriptor.idProduct, dwInterfaceNum, hDevice);
/* Add our device to the device list */
pDevCtx = (DEVICE_CONTEXT *)malloc(sizeof(DEVICE_CONTEXT)); if (!pDevCtx) {
ERR(\failed allocating memory\\n\ return FALSE; }
BZERO(*pDevCtx);
pDevCtx->hDevice = hDevice;
pDevCtx->dwInterfaceNum = dwInterfaceNum;
pDevCtx->dwVendorId = pDeviceInfo->Descriptor.idVendor; pDevCtx->dwProductId = pDeviceInfo->Descriptor.idProduct; pDevCtx->dwAlternateSetting = dwAlternateSetting;
OsMutexLock(pDrvCtx->hMutex);
for (ppDevCtx = &pDrvCtx->deviceContextList; *ppDevCtx; ppDevCtx = &((*ppDevCtx)->pNext)); *ppDevCtx = pDevCtx; pDrvCtx->dwDeviceCount++; OsMutexUnlock(pDrvCtx->hMutex);
OsEventSignal(pDrvCtx->hEvent); /* Accept control over this device */ return TRUE; }
static VOID DLLCALLCONV DeviceDetach(WDU_DEVICE_HANDLE hDevice, PVOID pUserData) {
DRIVER_CONTEXT *pDrvCtx = (DRIVER_CONTEXT *)pUserData; DEVICE_CONTEXT **pCur; DEVICE_CONTEXT *pTmpDev; BOOL bDetachActiveDev = FALSE;
TRACE(\received detach for device handle 0x%p\\n\hDevice);
OsMutexLock(pDrvCtx->hMutex);
for (pCur = &pDrvCtx->deviceContextList; *pCur && (*pCur)->hDevice != hDevice; pCur = &((*pCur)->pNext));
if (*pCur == pDrvCtx->pActiveDev) {
bDetachActiveDev = TRUE;
pDrvCtx->pActiveDev = NULL; }
pTmpDev = *pCur; *pCur = pTmpDev->pNext; free(pTmpDev);
pDrvCtx->dwDeviceCount--; OsMutexUnlock(pDrvCtx->hMutex);
if (bDetachActiveDev) {
/* When hDeviceUnusedEvent is not signaled, hDevice is possibly in use, * and therefore the detach callback needs to wait on it until it is * certain that it cannot be used.
* When it is signaled - hDevice is no longer used. */ OsEventWait(pDrvCtx->hDeviceUnusedEvent, INFINITE); } }
DWORD DriverInit(WDU_MATCH_TABLE *pMatchTables, DWORD dwNumMatchTables, const PCHAR sDriverName, const PCHAR sLicense, DRIVER_CONTEXT *pDrvCtx) {
DWORD dwError;
WDU_EVENT_TABLE eventTable;
/* Set Driver Name */
if (!WD_DriverName(sDriverName)) {
ERR(\Could not set driver name to %s, exiting\\n\ sDriverName);
return WD_SYSTEM_INTERNAL_ERROR; }
dwError = OsEventCreate(&pDrvCtx->hEvent); if (dwError) {
ERR(\OsEventCreate() failed on event 0x%p: error 0x%lx \ \pDrvCtx->hEvent, dwError, Stat2Str(dwError)); return dwError; }
dwError = OsMutexCreate(&pDrvCtx->hMutex); if (dwError) {
ERR(\OsMutexCreate() failed on mutex 0x%p: error 0x%lx \ \pDrvCtx->hMutex, dwError, Stat2Str(dwError)); return dwError; }
dwError = OsEventCreate(&pDrvCtx->hDeviceUnusedEvent); if (dwError) {
ERR(\OsEventCreate() failed on event 0x%p: error 0x%lx \ \pDrvCtx->hDeviceUnusedEvent, dwError, Stat2Str(dwError)); return dwError; }
利用windriver 开发了个usb的驱动,写个开发心得
