关于USB通信的问题，求高手帮忙

huzy204 2010-08-04 07:37:05

最近在研究USB通信的问题，
编程实现了通过GUID得到USB File Transfer的GUID，CreateFile也返回有效的句柄，但接下来WriteFile总是返回FALSE，GetLastError（）为6。
参考的是这个例子
http://topic.csdn.net/u/20090521/18/3f1b3848-0839-4bab-ab5b-01a8cb383cea.html
改例子中有一段：
HANDLE hPipe = OpenMyDevPipe("MyPipe1"); //驱动程序里面的 Pipe 名, 对应访问某个端点的 I/O, 这里我乱写的, 需要与驱动一致
if(hPipe != INVALID_HANDLE_VALUE) //打开 Pipe 成功
{
ReadFile(hPipe, Buffer, BufSize, &nBytesRead, NULL); //从 hPipe 里读取数据到 Buffer 里
//WriteFile(hPipe, Buffer, BytesToWrite, &nBytesWritten, NULL); //把 Buffer 里面的 BytesToWrite 字节写入 hPipe
CloseHandle(hPipe);
}

提到Pipe名要与驱动一致。我现在安装了这个USB通信线的驱动，我如何得到这个Pipe名呢？

接下来一段也提到用DeviceIoControl 必须看驱动说明，目前我已经向厂商问清楚，这个USB线的芯片是：GL620USB-A，我也从网上下载了GL620USB-A的说明文件，但是还是无法从里面提炼出 Pipe名和DeviceIoControl的参数。

有经验的高手是否能给小弟一点提示。万分感谢！

附程序源码和芯片说明文档下载地址：



#include <ObjBase.h>

#include <initguid.h>

DEFINE_GUID(HidGuid, 0xf18a0e88,0xc30c,0x11d0,0x88,0x15,0x00,0xa0,0xc9,0x06,0xbe,0xd8);



void main(int argc, char* argv[])

{

	printf("Hello World!\n");

	char	MyDevPathName[1024]={0};

	HDEVINFO hDevInfoSet;

	DWORD MemberIndex = 0;

	BOOL Result;

	SP_DEVICE_INTERFACE_DATA DevInterfaceData;

	DWORD RequiredSize;

	PSP_DEVICE_INTERFACE_DETAIL_DATA pDevDetailData;

	

	HANDLE hDevHandle;

	HANDLE	hReadHandle = INVALID_HANDLE_VALUE;

	HANDLE	hWriteHandle = INVALID_HANDLE_VALUE;

	HIDD_ATTRIBUTES DevAttributes;

	

	DevInterfaceData.cbSize = sizeof(DevInterfaceData);

	DevAttributes.Size = sizeof(DevAttributes);

	hDevInfoSet = SetupDiGetClassDevs(&HidGuid, NULL, NULL, DIGCF_DEVICEINTERFACE | DIGCF_PRESENT);

	while (1)

	{

		Result = SetupDiEnumDeviceInterfaces(hDevInfoSet, NULL, &HidGuid, MemberIndex, &DevInterfaceData);

		if (!Result)

			break;

		MemberIndex++;

		

		Result = SetupDiGetDeviceInterfaceDetail(hDevInfoSet, &DevInterfaceData, NULL, NULL, &RequiredSize, NULL);

		pDevDetailData = (PSP_DEVICE_INTERFACE_DETAIL_DATA)malloc(RequiredSize);

		if (pDevDetailData == NULL)

		{

			SetupDiDestroyDeviceInfoList(hDevInfoSet);

			return;

		}

		pDevDetailData->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA);

		SP_DEVINFO_DATA did = {sizeof(SP_DEVINFO_DATA)};

		Result = SetupDiGetDeviceInterfaceDetail(hDevInfoSet, &DevInterfaceData, pDevDetailData, RequiredSize, NULL, &did);

		strcpy(MyDevPathName,pDevDetailData->DevicePath);



		if (!strstr(MyDevPathName,"3ab45e4d"))

		{

			continue;

		}

		

		TCHAR fname[256];

		if(!SetupDiGetDeviceRegistryProperty(hDevInfoSet,&did,SPDRP_FRIENDLYNAME,NULL,(PBYTE) fname,sizeof(fname),NULL)

			&& !SetupDiGetDeviceRegistryProperty(hDevInfoSet,&did,SPDRP_DEVICEDESC,NULL,(PBYTE) fname,sizeof(fname),NULL))

			strcpy(fname,pDevDetailData->DevicePath);

 		if(!SetupDiGetDeviceRegistryProperty(hDevInfoSet,&did,SPDRP_PHYSICAL_DEVICE_OBJECT_NAME,NULL,(PBYTE) fname,sizeof(fname),NULL)

 			&& !SetupDiGetDeviceRegistryProperty(hDevInfoSet,&did,SPDRP_DEVICEDESC,NULL,(PBYTE) fname,sizeof(fname),NULL))

 			strcpy(fname,pDevDetailData->DevicePath);

		free(pDevDetailData);

		if (Result == FALSE)

			continue;

		

		hDevHandle = CreateFile(MyDevPathName, NULL, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);

		if (hDevHandle != INVALID_HANDLE_VALUE)

		{

				strcat(MyDevPathName,"\\PIPE02");

				hWriteHandle = CreateFile(MyDevPathName, GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING,

					FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED, NULL);

				if (hWriteHandle != INVALID_HANDLE_VALUE)

				{

					BOOL	PortReadyWrite = true;

					unsigned char check_link[] = "HELLOWORLD";

					BOOL result;

					OVERLAPPED overlapped;

					DWORD number;

					overlapped.Offset = 0;

					overlapped.OffsetHigh = 0;

					result = WriteFile(hWriteHandle, check_link, sizeof(check_link), &number, &overlapped);

					DWORD	dwError = GetLastError();

				}

		}

	}

	SetupDiDestroyDeviceInfoList(hDevInfoSet); 

	

	return;

}