Qt读写Usb设备的数据

#ifndef QUSBENDPOINT_H #define QUSBENDPOINT_H #include "qusbdevice.h" #include "qusb.h" #include <QIODevice> #include <QObject> class QUsbEndpointPrivate; class Q_USB_EXPORT QUsbEndpoint : public QIODevice { Q_OBJECT Q_DECLARE_PRIVATE(QUsbEndpoint) public: enum Type : quint8 { controlEndpoint = 0, isochronousEndpoint, bulkEndpoint, interruptEndpoint, streamEndpoint }; Q_ENUM(Type) enum Status : quint8 { transferCompleted, transferError, transferTimeout, transferCanceled, transferStall, transferNoDevice, transferOverflow, }; Q_ENUM(Status) enum bmRequestType : quint8 { requestStandard = (0x00 << 5), requestClass = (0x01 << 5), requestVendor = (0x02 << 5), requestReserved = (0x03 << 5), recipientDevice = 0x00, recipientInterface = 0x01, recipientEndpoint = 0x02, recipientOther = 0x03 }; Q_ENUM(bmRequestType) enum bRequest : quint8 { requestGetStatus = 0x00, requestClearFeature = 0x01, requestSetFeature = 0x03, requestSetAddress = 0x05, requestGetDescriptor = 0x06, requestSetDescriptor = 0x07, requestGetConfiguration = 0x08, requestSetConfiguration = 0x09, requestGetInterface = 0x0A, requestSetInterface = 0x0B, requestSynchFrame = 0x0C, requestSetSel = 0x30, requestIsochDelay = 0x31 }; Q_ENUM(bRequest) Q_PROPERTY(Type type READ type) Q_PROPERTY(quint8 endpoint READ endpoint) Q_PROPERTY(bool polling READ polling WRITE setPolling) explicit QUsbEndpoint(QUsbDevice *dev, Type type, quint8 ep); ~QUsbEndpoint(); bool open(QIODevice::OpenMode mode); void close(); Type type() const; quint8 endpoint() const; Status status() const; bool isSequential() const; qint64 bytesAvailable() const; qint64 bytesToWrite() const; bool waitForBytesWritten(int msecs); bool waitForReadyRead(int msecs); void makeControlPacket(char *buffer, QUsbEndpoint::bmRequestType bmRequestType, QUsbEndpoint::bRequest bRequest, quint16 wValue, quint16 wIndex, quint16 wLength) const; void setPolling(bool enable); bool polling(); bool poll(); public slots: void cancelTransfer(); Q_SIGNALS: void error(QUsbEndpoint::Status error); protected: qint64 readData(char *data, qint64 maxSize); qint64 writeData(const char *data, qint64 maxSize); private: QUsbEndpointPrivate *const d_dummy; Q_DISABLE_COPY(QUsbEndpoint) Status m_status; const QUsbDevice *m_dev; const Type m_type; const quint8 m_ep; }; #endif // QUSBENDPOINT_H