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Contents Programming For USB Device Overview Programmers Guide Scenario Data transfer Synchronous Transfer Asynchronous Transfer Reading Descriptors USB Support Routines And Structures Common Procedures UsbEnumerateDevices OpenRapidUsb IsRapidUsbOpened CloseRapidUsb Descriptors UsbGetDescriptor UsbGetDeviceDescriptor UsbGetStringDescriptor UsbGetConfigDescriptor UsbFreeConfigDescriptor UsbGetInterfaceDescriptor UsbFreeInterfaceDescriptor UsbGetEndpointDescriptor Configure Device UsbGetDeviceInfo UsbUnconfigureDevice UsbSelectConfig UsbGetConfig UsbSelectInterface UsbGetInterface UsbResetDevice UsbGetBandwidthInfo UsbCyclePort Features and Status UsbSetFeature UsbClearFeature UsbGetStatus Vendor/Class Requests UsbVendorRequestIn UsbVendorRequestOut UsbClassRequestIn UsbClassRequestOut Pipes IsRapidUsbPipeOpened UsbPipeOpen UsbPipeClose UsbGetPipeCount UsbPipeGetInfo UsbPipeDirectionIn UsbPipeGetType UsbTransfer UsbTransferAsync TRANSFER_COMPLETION_ROUTINE UsbCancelTransfer UsbPipeReset UsbPipeAbort Other UsbGetPortStatus UsbGetCurrentFrameNumber USB Structures and Types RDUSB_DEVICE_INFORMATION RDUSB_PIPE_INFORMATION RDUSB_PIPE_TYPE RDUSB_BANDWIDTH_INFORMATION		Synchronous Transfer Go to RapidDriver Main Page Synchronous Transfer Transfer data in synchronous mode using function UsbTransfer is rather simple but it blocks calling thread execution until transfer completes. The following is an example of blocking transfer assuming that all handles are opened. Error checks are omitted. For extended information about synchronous transfer refer to 'Pipes' example.            USB_DEVICE_HANDLE hUsb;    USB_PIPE_HANDLE hPipe;    PVOID pBuffer;    ULONG BufferLength, BytesReturned;    // Open first RapidUSB device    hUsb = OpenRapidUsb(0);        // Open first RapidUSB device pipe    hPipe = UsbPipeOpen(hUsb, 0);    // Allocate transfer buffer    pBuffer = malloc(BufferLength);        // Start transfer...    BOOL success = UsbTransfer(hPipe, pBuffer, BufferLength, &BytesReturned);    // thread waits transfer operation to finish        if ( success)    {       // Transfer successful...    }    else    {       // Transfer failed....    }    free(pBuffer);    UsbPipeClose(hPipe);    CloseRapidUsb(hUsb);