/* bulk 传输关流:需要修改udc控制器,将usb 控制器clear_halt 注册到uvc function 驱动里面*/ if(usb_endpoint_xfer_bulk(&uvc->desc.vs_ep)){ memset(&v4l2_event,0,sizeof(v4l2_event)); v4l2_event.type=UVC_EVENT_STREANOFF; memcpy(&uvc_event->req,ctrl,sizeof(uvc_event->req)); v4l2_event...
kernel-5.10/drivers/usb/gadget/function/uvc_v4l2.c staticintuvc_v4l2_streamon(structfile *file,void*fh,enumv4l2_buf_type type){structvideo_device*vdev =video_devdata(file);structuvc_device*uvc =video_get_drvdata(vdev);structuvc_video*video = &uvc->video;intret;//通过打印知道在此处判断不...
USB_EPStartXfer设置了发送数据大小,并使能IN端点; 要发送的数据时怎么让USB外设知道的: CDC_Transmit_HS调用usbd_cdc.c中的USBD_CDC_SetTxBuffer USBD_CDC_SetTxBuffer中设置hcdc->TxBuffer,hcdc->TxLength HAL_PCD_EP_Transmit中设置ep->xfer_buff,ep->xfer_len stm32f4_ii_usb.c中的USB_EPStartXfer...
即如果主机上有很多其他优先级更高的周期类型的传输（同步 ISO 传输和中断 INT 传输），则在 BULK传输...
.bmAttributes = USB_ENDPOINT_XFER_BULK, // 设置为Bulk传输 .wMaxPacketSize = 512, // 最大数据包大小(可根据需要调整) .bInterval = 0, // Bulk传输不需要设置间隔 }; // 主机端驱动代码示例(简化版) int uvc_video_enable(struct uvc_streaming *stream, int enable) { int ret; if (!enable)...
(intk=0;k<devices;k++){if(WaitForSingleObject(inOvLapList[k][nextBuffer].hEvent,2000)!=WAIT_OBJECT_0){printf("WaitForXfer failed!\n");fail=true;gotoEnd;}rLen=bufferSize;if(USBDevices[k]->BulkInEndPt->FinishDataXfer(bufferList[k][nextBuffer],rLen,&(inOvLapList[k][nextBuffe...
qn15367143062020-05-16 14:23:26
(OTG1_EPLISTADDR,direct_IN,EP_0,USB_ENDPOINT_XFER_CONTROL,0x40,usb_ep_qh_init(OTG1_EPLISTADDR,direct_OUT,EP_0,USB_ENDPOINT_XFER_CONTROL,0x40,/*设置qH首地址*/USB_OTG1_LISTADDROTG1_EPLISTADDR;/*设置USBCMD寄存器中的RUN位*/USB_OTG1_USBCMDUSB_USBCMD_RS;1.2总线复位后的初始化上电...
usb_ep_qh_init(OTG1_EPLISTADDR,direct_OUT,EP_0,USB_ENDPOINT_XFER_CONTROL,0x40,0,0); /*设置qH首地址*/ USB_OTG1_LISTADDR=OTG1_EPLISTADDR; /*设置USBCMD寄存器中的RUN位*/ USB_OTG1_USBCMD|=USB_USBCMD_RS; 1.2总线复位后的初始化 ...
publicintgetMaxLun(){//接收响应数据byte[]buffer=newbyte[1];usbDeviceConnection.controlTransfer(0xA1,0xFE,0,usbInterface.getId(),buffer,1,5000);//转成intreturn(buffer[0]&0xFF)+1;} GET MAX LUN请求格式如上图,bmRequestType的二进制值为10100001b转为十六进制值为0xA1,相应的bRequest值为0xFE,...