On UHCI and OHCI host controllers, if USBD_SHORT_TRANSFER_OK is not set for a bulk or interrupt transfer, a short packet transfer halts the endpoint and an error code is returned for the transfer. The client driver must resume the endpoint by submitting a URB_FUNCTION_SYNC_RESET_PIP...
ファンクション コード URB_FUNCTION_CONTROL_TRANSFER、URB_FUNCTION_BULK_OR_INTERRUPT_TRANSFER、URB_FUNCTION_ISOCH_TRANSFER はそれぞれ、制御転送、一括/割り込み転送、およびアイソクロナス転送を示します。 USB ドライバー スタックは、Statusメンバーを使用して、USB 固有の状態コードを返します...
Status: USBD_STATUS_PENDING (0x40000000) UsbdFlags: (0x0) dt _URB_BULK_OR_INTERRUPT_TRANSFER 0xfffffa8005a2cbe8 PipeHandle: 0xfffffa800596f720 TransferFlags: (0x1) USBD_TRANSFER_DIRECTION_IN TransferBufferLength: 0x0 TransferBuffer: 0xfffffa8005a2cc88 TransferBufferMDL: 0xfffffa8005848930...
void usb_fill_bulk_urb(struct urb *urb, struct usb_device *dev, unsigned int pipe, void *transfer_buffer, int buffer_length, usb_complete_t complete, void *context); void usb_fill_bulk_urb(struct urb *urb, struct usb_device *dev, unsigned int pipe, unsigned char* setup_packet,void *...
我正在linux内核空间中开发一个USB驱动程序,我的usb接口作为两个批量端点(IN和OUT).I使用一个URB来发送和接收数据。我可以使用相同的usb_alloc_urb()来发送和接收数据吗?我正在使用以下步骤通过urb发送和接收数据使用usb_sndbulkpipe的usb_fill_bulk_urb()->使用usb_rcvbulkpipe的 ...
void usb_fill_bulk_urb(struct urb *urb, struct usb_device *dev, unsigned int pipe, void *transfer_buffer, int buffer_length, usb_complete_t complete, void *context); void usb_fill_bulk_urb(struct urb *urb, struct usb_device *dev, unsigned int pipe, ...
void *transfer_buffer, int buffer_length, usb_complete_t complete_fn, void *context, int interval) 分别用来填充CONTORL,BULK,INT类型的URB. 观察他们的函数原型,发现有很多相的的参数.先对这些参数做一下解释: Urb:是要初始化的urb Dev:表示消息要被发送到的USB设备 ...
urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; */usb_fill_control_urb(urb, dev->udev, usb_sndctrlpipe(dev->udev,0), (unsignedchar*)cr, (void*)buf, LCD_COMMAND_SIZE, ikalcd_write_control_callback, dev); usb_anchor_urb(urb, &dev->submitted);/* send the data out the bulk po...
bulk_in_found =true;break; }if(!bulk_in_found) { dev_err(&priv->udev->dev,"Error - the proper endpoints were not found!\n");gotoerror; } usb_set_serial_data(serial, priv);return0; error: usb_free_urb(priv->bulk_read_urb); ...
The _URB_BULK_OR_INTERRUPT_TRANSFER structure is used by USB client drivers to send or receive data on a bulk pipe or on an interrupt pipe.SyntaxC++ Copy struct _URB_BULK_OR_INTERRUPT_TRANSFER { struct _URB_HEADER Hdr; USBD_PIPE_HANDLE PipeHandle; ULONG TransferFlags; ULONG Transfer...