Probe/Commit

USBH_Status usbhuvcVSRequest(USB_OTG_CORE_HANDLE *pdev, uint8_t bRequest, uint8_t control, uint16_t wLength, uint8_t * data)
{
  if(bRequest & 0x80)
  {
    // IN
    USB_Host.Control.setup.b.bmRequestType = USB_D2H | USB_REQ_RECIPIENT_INTERFACE | USB_REQ_TYPE_CLASS;
    USB_Host.Control.setup.b.bRequest = bRequest;
    USB_Host.Control.setup.b.wValue.w = (uint16_t)(control << 8);
    USB_Host.Control.setup.b.wLength.w = wLength;
    USB_Host.Control.setup.b.wIndex.w = UVCD.vs_interfaces[0].bInterfaceNumber;
    USB_Host.Control.buff = data;
  }
  else
  {
    // OUT
    USB_Host.Control.setup.b.bmRequestType = USB_H2D + USB_REQ_RECIPIENT_INTERFACE + USB_REQ_TYPE_CLASS;
    USB_Host.Control.setup.b.bRequest = bRequest;
    USB_Host.Control.setup.b.wValue.w = (uint16_t)(control << 8);
    USB_Host.Control.setup.b.wLength.w = wLength;
    USB_Host.Control.setup.b.wIndex.w = UVCD.vs_interfaces[0].bInterfaceNumber;
    USB_Host.Control.buff = data;
  }

  return USBH_CtlReq(pdev, &USB_Host, data, wLength);
}

USBH_Status usbhuvcProbe(USB_OTG_CORE_HANDLE *pdev)
{
  memset(&UVCD.pc_min, 0, sizeof(UVCD.pc_min));
  memset(&UVCD.pc_max, 0, sizeof(UVCD.pc_max));

  volatile USBH_Status ret = USBH_OK;


  do
  {
    USBH_Process(pdev, &USB_Host);
    ret = usbhuvcVSRequest(pdev, UVC_SET_CUR, UVC_CTRL_VS_PROBE_CONTROL, sizeof(UVCD.pc), (uint8_t*)&UVCD.pc);
  } while (ret != USBH_OK);

  do
  {
    USBH_Process(pdev, &USB_Host);
    ret = usbhuvcVSRequest(pdev, UVC_GET_CUR, UVC_CTRL_VS_PROBE_CONTROL, sizeof(UVCD.pc), (uint8_t*)&UVCD.pc);
  } while(ret != USBH_OK);

  do
  {
    USBH_Process(pdev, &USB_Host);
    ret = usbhuvcVSRequest(pdev, UVC_GET_MAX, UVC_CTRL_VS_PROBE_CONTROL, sizeof(UVCD.pc_max), (uint8_t*)&UVCD.pc_max);
  } while(ret != USBH_OK);

  do
  {
    USBH_Process(pdev, &USB_Host);
    ret = usbhuvcVSRequest(pdev, UVC_GET_MIN, UVC_CTRL_VS_PROBE_CONTROL, sizeof(UVCD.pc_min), (uint8_t*)&UVCD.pc_min);
  } while(ret != USBH_OK);

  return ret;
}

USBH_Status usbhuvcCommit(USB_OTG_CORE_HANDLE *pdev)
{
  USBH_Status ret = USBH_OK;

  do
  {
    USBH_Process(pdev, &USB_Host);
    ret = usbhuvcVSRequest(pdev, UVC_SET_CUR, UVC_CTRL_VS_COMMIT_CONTROL, sizeof(UVCD.pc), (uint8_t*)&UVCD.pc);
  } while(ret != USBH_OK);

  return ret;
}