香版主 STM32 USB HID 问题

只看该作者 · 2012-2-6 23:48

香版主，你好，请帮忙看一下，问题是在pc机在发送完成SET_REPORT后无法进入CustomHID_Status_In这个函数，后查看pInformation->ControlStat值为STALLED，不清楚是怎么会产生STALLED的值。程序代码如下:

RESULT CustomHID_Data_Setup(uint8_t RequestNo)
{
  uint8_t *(*CopyRoutine)(uint16_t);
  CopyRoutine = NULL;
  if ((RequestNo == GET_DESCRIPTOR)
   && (Type_Recipient == (STANDARD_REQUEST | INTERFACE_RECIPIENT))
   && (pInformation->USBwIndex0 == 0))
  {
if (pInformation->USBwValue1 == REPORT_DESCRIPTOR)
{
   CopyRoutine = CustomHID_GetReportDescriptor;
}
else if (pInformation->USBwValue1 == HID_DESCRIPTOR_TYPE)
{
   CopyRoutine = CustomHID_GetHIDDescriptor;
}
  } /* End of GET_DESCRIPTOR */
  if (pInformation->USBbmRequestType == CLASS_REQUEST|INTERFACE_RECIPIENT//处理SET_REPORT请求
         && RequestNo == SET_REPORT)
  {
      CopyRoutine = CustomHID_SetReport;
  }
else if((Type_Recipient == (CLASS_REQUEST | INTERFACE_RECIPIENT))//处理GET_REPORT请求
      && RequestNo == GET_REPORT)
  {
CopyRoutine = CustomHID_GetReport;
  }
  if (CopyRoutine == NULL)
  {
return USB_UNSUPPORT;
  }
  pInformation->Ctrl_Info.CopyData = CopyRoutine;
  pInformation->Ctrl_Info.Usb_wOffset = 0;
  (*CopyRoutine)(0);
  return USB_SUCCESS;
}

回调函数代码如下:

uint8_t *CustomHID_SetReport(uint16_t length)
{
if (length == 0)
{
pInformation->Ctrl_Info.Usb_wLength = 1024-pInformation->Ctrl_Info.Usb_wOffset;
return NULL;
}

return &My_Buffer[pInformation->Ctrl_Info.Usb_wOffset];
}

uint8_t *CustomHID_GetReport(uint16_t Length)
{
  if (Length == 0)
  {
pInformation->Ctrl_Info.Usb_wLength = 1024-pInformation->Ctrl_Info.Usb_wOffset
  return NULL;
  }
  return &My_Buffer[pInformation->Ctrl_Info.Usb_wOffset
}

包的大小为16个字节。
如果按照你的说法，在CustomHID_Data_Setup函数RETURN之前将(*CopyRoutine)(0)改成pInformation->Usb_wLength = (*CopyRoutine)(0);
但是编译后，报错该成员不存在，不知是笔误，还是另有其它的结构体。
谢谢，请帮忙解决一下

只看该作者 · 2012-2-6 23:55

这是CustomHID_Status_In的源码
void CustomHID_Status_In(void)
{
if (Type_Recipient == (CLASS_REQUEST|INTERFACE_RECIPIENT)          && (pInformation->USBbRequest) == SET_REPORT)
{
if (pInformation->ControlState == WAIT_STATUS_IN)
//
  {
               data_process_flag= 1;
  }
}

}