STM32F439 USB UVC（YUY2）

335920284 · 发表于 2017-6-13 17:22:19

刚入手STM32F429IGT开发板，各种例程都全的，但可惜没有USB UVC部分，网上找了些例子，不过都是传输MJPEG数据的，移植到板子上没啥问题，但是想实现传输YUY2数据，参照USBUVC协议搞了两周了快，一直搞不定，要么就是提示配置描述符无效（即使描述符是我从一个网购的USB UVC摄像头用BUSHOUND软件采集的配置描述符），要么就是不能出图，提示没有介质筛选器，请问有做过的朋友吗？麻烦发我一份例程吧，非常感谢！！！附件是USB UVC1.5协议，方便大家下载。
我的邮箱:33590284@qq.com

335920284 · 发表于 2017-6-13 17:22:20

已解决，数据不匹配问题怀疑是bushound软件问题，出图没问题。

335920284 · 发表于 2017-6-13 17:23:58

支持自己下，希望能找到答案~~

正点原子 · 发表于 2017-6-14 21:09:47

帮顶

335920284 · 发表于 2017-6-15 10:13:33

今天试着先搞MJPEG，发现新问题，没有摄像头数据时，程序本来只发送2个字节的header数据，但是在bushound里面发现传输的是64个字节。
然后捕获按键操作来模拟一帧摄像头数据，结果发现传输的大小还是不一样，差的太多了，本来模拟的是102400字节，结果只发送了很少，搞不懂啊，求指教啊。以下是发送时的代码以及bushound数据。
static uint8_t  usbd_video_DataIn (void *pdev, uint8_t epnum)
{
static uint16_t packets_cnt = 0xffff;
static uint8_t header[2] = {2,0};//length + data
static uint32_t picture_pos;
static uint16_t packets_in_frame = 1;
static uint16_t last_packet_size = 0;
static uint8_t tx_enable_flag = 0;//
static uint8_t packet[VIDEO_PACKET_SIZE];
uint16_t i;

if (epnum != (UVC_DATA_EP & 0x7F))
{
return USBD_OK;
  }

DCD_EP_Flush(pdev,USB_ENDPOINT_IN(UVC_DATA_EP));//very important

  if (tx_enable_flag) packets_cnt++;

  if (tx_enable_flag == 0)//if previous transmission ended
  {
if (jpeg_encode_done)//if frame endoding ended
{
   tx_enable_flag = 1;

   //start of new UVC frame
   packets_cnt = 0;
   header[1] ^= 0x01;//toggle bit0 every new frame
   header[1] &= ~(0x02); //EOF
   picture_pos = 0;

   packets_in_frame = (last_jpeg_frame_size/ (VIDEO_PACKET_SIZE -2))+1;//
   last_packet_size = (last_jpeg_frame_size - ((packets_in_frame-1) * (VIDEO_PACKET_SIZE-2)) + 2);//
   //printf("framesize=%d,framecnt=%d.\r\n", last_jpeg_frame_size, ov_frame);
}
  }

  packet[0] = header[0];
  packet[1] = header[1];

  //fill payload buffer
  for (i=2;i<VIDEO_PACKET_SIZE;i++)
  {
packet[i] = dcmi_data_bufR[picture_pos];
//packet[i] = packets_cnt;
picture_pos++;
  }

  if (play_status == 2)
  {
if (packets_cnt < (packets_in_frame - 1))
{
   DCD_EP_Tx (pdev,USB_ENDPOINT_IN(UVC_DATA_EP), (uint8_t*)packet, (uint32_t)VIDEO_PACKET_SIZE);
}
else if (tx_enable_flag == 1)//only if transmisson enabled
{
   //last packet in UVC frame
   packet[1] |= 0x02; //EOF
   DCD_EP_Tx (pdev,USB_ENDPOINT_IN(UVC_DATA_EP), (uint8_t*)packet, (uint32_t)last_packet_size);
   tx_enable_flag = 0;//stop TX data
   jpeg_encode_done = 0;
}
else
{
header[0]=2;header[1]=0;
   DCD_EP_Tx (pdev,USB_ENDPOINT_IN(UVC_DATA_EP), (uint8_t*)header, 2);//header only
   picture_pos = 0;
}
  }
  else
  {
packets_cnt = 0xffff;
picture_pos = 0;
  }

  return USBD_OK;
}

335920284 · 发表于 2017-6-15 10:14:49

这咋发图片啊？以下是bushound数据。
Bus Hound 6.01 capture on Windows Vista (x64). Complements of www.perisoft.net

  Device - Device ID (followed by the endpoint for USB devices)
         (22) USB Composite Device
         (25) USB Composite Device
         (26) USB Camera
         (27) USB Composite Device
         (28) STM32 CUSTOM HID in FS Mode
  Address - FireWire async address or channel number
  Length - Total transfer length
  Phase  - Phase Type
         ISOC  Isochronous transfer
  Data - Hex dump of the data transferred
  Descr  - Description of the phase
  Delta  - Elapsed time from the previous phase to the current phase
  Cmd... - Position in the captured data
  Driver - Driver that submitted the command
         usbvideo    : USB Video Class Driver 10.0.14393.82 (rs1_release.160805-1735)

Device  Address             Length Phase  Data                                                                                                 Description                      Delta  Cmd.Phase.Ofs(rep)  Driver
------  -------------------  --------  -----  ------------------------------------------------------------------------------------------------------  --------------------------------  -----  ------------------  ------------
  28.1                            64  ISOC 02 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  ................................ 14ms       1.1.0(5141)  usbvideo
                                          00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  ................................             1.1.32

335920284 · 发表于 2017-6-15 10:21:00

之前只做过Hid 中断传输和control传输，不知道是ISO传输相关库的bug还是我用的有问题，做过的朋友麻烦指教下。

335920284 · 发表于 2017-6-15 10:21:49

正点原子发表于 2017-6-14 21:09
帮顶

谢谢

335920284 · 发表于 2017-6-15 15:15:22

奇怪了只要在usbd_video_DataIn函数中调用DCD_EP_Tx函数就会导致数据不正常，明明发两个字节，bushound中显示发送了64个字节。
Bus Hound 6.01 capture on Windows Vista (x64). Complements of www.perisoft.net

Device  Address             Length Phase  Data                                                                                                 Description                      Delta  Cmd.Phase.Ofs(rep)  Driver
------  -------------------  --------  -----  ------------------------------------------------------------------------------------------------------  --------------------------------  -----  ------------------  ------------
  28.1                            64  ISOC 02 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  ................................ 32ms    18548.1.0       usbvideo
                                          00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  ................................          18548.1.32
  28.1                            64  ISOC 02 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  ................................ 31ms    18549.1.0       usbvideo
                                          00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  ................................          18549.1.32