VC++6.0 中使用libUsb库进行Hid USB设备通讯.doc

VC+6.0 中使用libUsb库进行Hid USB设备通讯1、首先在/wiki/libusb-win32#下载得到libusb-win32库和一些例子，插上需通讯的HID USB设备，打开下载的库，里面有个可执行文件，运行它，根据提示（注意PID和VID选好你所插的设备）生成inf文件并安装它。2、完成上一步就可以打开vc+6.0 开发应用程序和HID USB设备通讯了，注意要把与刚才生成的inf文件同文件夹下的lib文件、dll文件和usb.h文件添加到工程文件夹下，并在Project-Settings-Link下的Object/library modules中添加libusb.lib库文件，还有添加usb.h头文件。3、程序中用到的全局变量：#define MY_VID 0x8888#define MY_PID 0x0006usb_dev_handle *handle;HANDLE m_hDevice=INVALID_HANDLE_VALUE;CWinThread *m_pReadReportThread=NULL;OVERLAPPED ReadOverlapped;char ReadReportBuffer16=0;BYTE KeyStatus=0;volatile BOOL m_bReadReportRunFlag=FALSE;4、然后在OnInitDialog()下添加如下代码： struct usb_bus *busses, *bus; / usb_dev_handle *handle = NULL; /这个需定义为全局变量，在读线程中也许使用 usb_init(); usb_find_busses(); usb_find_devices(); busses = usb_get_busses(); for(bus = busses; bus; bus = bus-next) struct usb_device *dev; for(dev = bus-devices; dev; dev = dev-next) struct usb_device_descriptor *desc = &(dev-descriptor); if(desc-idVendor = 0x8888) & (desc-idProduct = 0x0006) handle = usb_open(dev); if (!handle ) MessageBox(error opening device: n%sn, usb_strerror(); return false; usb_set_configuration(handle,1); usb_claim_interface(handle,0);这是libusb的初始化代码，接下来就可以读写USB数据了。5、写数据：自己添加个按钮并生成按钮事件函数，在其中添加写USB过程WriteReportBuffer0=0x01; usb_bulk_write(handle,0x01,WriteReportBuffer,1,10);6、读数据：读USB设备需在创建一个不断读取USB数据的线程。在OnInitDialog()中添加创建线程代码：m_pReadReportThread=AfxBeginThread(ReadReportThread, this, THREAD_PRIORITY_NORMAL, 0, CREATE_SUSPENDED, /0, NULL); if (m_pReadReportThread=NULL) CString strLog; strLog=读报告线程创建不成功!; :AfxMessageBox(strLog); CloseHandle(m_hDevice); m_hDevice=INVALID_HANDLE_VALUE; exit(0); m_pReadReportThread-m_bAutoDelete=FALSE; m_pReadReportThread-ResumeThread(); /唤醒线程7、读线程函数也是全局函数,代码如下：UINT ReadReportThread(LPVOID lpParam) CLibUsbHidTestDlg *pDlg=(CLibUsbHidTestDlg *)lpParam; ReadOverlapped.Offset=0; ReadOverlapped.OffsetHigh=0; ReadOverlapped.hEvent=CreateEvent(NULL,TRUE,FALSE,NULL); m_bReadReportRunFlag=TRUE; while (TRUE) if (!m_bReadReportRunFlag) /Exit Thread Code if (ReadOverlapped.hEvent!=NULL) CloseHandle(ReadOverlapped.hEvent); ReadOverlapped.hEvent=NULL; return 0; ResetEvent(ReadOverlapped.hEvent); usb_bulk_read(handle, 0x81, ReadReportBuffer, sizeof(ReadReportBuffer), 100); KeyStatus=ReadReportB