usb_core.c

STM32不完全手册 例程源码 29个

    is Disabled*/
    Status = _GetEPTxStatus(Related_Endpoint);
  }
  else
  {
    Status = _GetEPRxStatus(Related_Endpoint);
  }

  if (Related_Endpoint >= Device_Table.Total_Endpoint
      || pInformation->USBwValue != 0 || Status == 0
      || pInformation->Current_Configuration == 0)
  {
    return USB_UNSUPPORT;
  }
  else
  {
    if (wIndex0 & 0x80)
    {
      /* IN endpoint */
      _SetEPTxStatus(Related_Endpoint, EP_TX_STALL);
    }

    else
    {
      /* OUT endpoint */
      _SetEPRxStatus(Related_Endpoint, EP_RX_STALL);
    }
  }
  pUser_Standard_Requests->User_SetEndPointFeature();
  return USB_SUCCESS;
}

/*******************************************************************************
* Function Name  : Standard_SetDeviceFeature.
* Description    : Set or enable a specific feature of Device.
* Input          : None.
* Output         : None.
* Return         : - Return USB_SUCCESS, if the request is performed.
*                  - Return USB_UNSUPPORT, if the request is invalid.
*******************************************************************************/
RESULT Standard_SetDeviceFeature(void)
{
  SetBit(pInformation->Current_Feature, 5);
  pUser_Standard_Requests->User_SetDeviceFeature();
  return USB_SUCCESS;
}

/*******************************************************************************
* Function Name  : Standard_GetDescriptorData.
* Description    : Standard_GetDescriptorData is used for descriptors transfer.
*                : This routine is used for the descriptors resident in Flash
*                  or RAM
*                  pDesc can be in either Flash or RAM
*                  The purpose of this routine is to have a versatile way to
*                  response descriptors request. It allows user to generate
*                  certain descriptors with software or read descriptors from
*                  external storage part by part.
* Input          : - Length - Length of the data in this transfer.
*                  - pDesc - A pointer points to descriptor struct.
*                  The structure gives the initial address of the descriptor and
*                  its original size.
* Output         : None.
* Return         : Address of a part of the descriptor pointed by the Usb_
*                  wOffset The buffer pointed by this address contains at least
*                  Length bytes.
*******************************************************************************/
u8 *Standard_GetDescriptorData(u16 Length, ONE_DESCRIPTOR *pDesc)
{
  u32  wOffset;

  wOffset = pInformation->Ctrl_Info.Usb_wOffset;
  if (Length == 0)
  {
    pInformation->Ctrl_Info.Usb_wLength = pDesc->Descriptor_Size - wOffset;
    return 0;
  }

  return pDesc->Descriptor + wOffset;
}

/*******************************************************************************
* Function Name  : DataStageOut.
* Description    : Data stage of a Control Write Transfer.
* Input          : None.
* Output         : None.
* Return         : None.
*******************************************************************************/
void DataStageOut(void)
{
  ENDPOINT_INFO *pEPinfo = &pInformation->Ctrl_Info;
  u32 save_rLength;

  save_rLength = pEPinfo->Usb_rLength;

  if (pEPinfo->CopyData && save_rLength)
  {
    u8 *Buffer;
    u32 Length;

    Length = pEPinfo->PacketSize;
    if (Length > save_rLength)
    {
      Length = save_rLength;
    }

    Buffer = (*pEPinfo->CopyData)(Length);
    pEPinfo->Usb_rLength -= Length;
    pEPinfo->Usb_rOffset += Length;

    PMAToUserBufferCopy(Buffer, GetEPRxAddr(ENDP0), Length);
  }

  if (pEPinfo->Usb_rLength != 0)
  {
    vSetEPRxStatus(EP_RX_VALID);/* re-enable for next data reception */
    SetEPTxCount(ENDP0, 0);
    vSetEPTxStatus(EP_TX_VALID);/* Expect the host to abort the data OUT stage */
  }
  /* Set the next State*/
  if (pEPinfo->Usb_rLength >= pEPinfo->PacketSize)
  {
    pInformation->ControlState = OUT_DATA;
  }
  else
  {
    if (pEPinfo->Usb_rLength > 0)
    {
      pInformation->ControlState = LAST_OUT_DATA;
    }
    else if (pEPinfo->Usb_rLength == 0)
    {
      pInformation->ControlState = WAIT_STATUS_IN;
      USB_StatusIn();
    }
  }
}

/*******************************************************************************
* Function Name  : DataStageIn.
* Description    : Data stage of a Control Read Transfer.
* Input          : None.
* Output         : None.
* Return         : None.
*******************************************************************************/
void DataStageIn(void)
{
  ENDPOINT_INFO *pEPinfo = &pInformation->Ctrl_Info;
  u32 save_wLength = pEPinfo->Usb_wLength;
  u32 ControlState = pInformation->ControlState;

  u8 *DataBuffer;
  u32 Length;

  if ((save_wLength == 0) && (ControlState == LAST_IN_DATA))
  {
    if(Data_Mul_MaxPacketSize == TRUE)
    {
      /* No more data to send and empty packet */
      Send0LengthData();
      ControlState = LAST_IN_DATA;
      Data_Mul_MaxPacketSize = FALSE;
    }
    else 
    {
      /* No more data to send so STALL the TX Status*/
      ControlState = WAIT_STATUS_OUT;
      vSetEPTxStatus(EP_TX_STALL);
    }
    
    goto Expect_Status_Out;
  }

  Length = pEPinfo->PacketSize;
  ControlState = (save_wLength <= Length) ? LAST_IN_DATA : IN_DATA;

  if (Length > save_wLength)
  {
    Length = save_wLength;
  }

  DataBuffer = (*pEPinfo->CopyData)(Length);

  UserToPMABufferCopy(DataBuffer, GetEPTxAddr(ENDP0), Length);

  SetEPTxCount(ENDP0, Length);

  pEPinfo->Usb_wLength -= Length;
  pEPinfo->Usb_wOffset += Length;
  vSetEPTxStatus(EP_TX_VALID);

  USB_StatusOut();/* Expect the host to abort the data IN stage */

Expect_Status_Out:
  pInformation->ControlState = ControlState;
}

/*******************************************************************************
* Function Name  : NoData_Setup0.
* Description    : Proceed the processing of setup request without data stage.
* Input          : None.
* Output         : None.
* Return         : None.
*******************************************************************************/
void NoData_Setup0(void)
{
  RESULT Result = USB_UNSUPPORT;
  u32 RequestNo = pInformation->USBbRequest;
  u32 ControlState;

  if (Type_Recipient == (STANDARD_REQUEST | DEVICE_RECIPIENT))
  {
    /* Device Request*/
    /* SET_CONFIGURATION*/
    if (RequestNo == SET_CONFIGURATION)
    {
      Result = Standard_SetConfiguration();
    }

    /*SET ADDRESS*/
    else if (RequestNo == SET_ADDRESS)
    {
      if ((pInformation->USBwValue0 > 127) || (pInformation->USBwValue1 != 0)
          || (pInformation->USBwIndex != 0)
          || (pInformation->Current_Configuration != 0))
        /* Device Address should be 127 or less*/
      {
        ControlState = STALLED;
        goto exit_NoData_Setup0;
      }
      else
      {
        Result = USB_SUCCESS;
      }
    }
    /*SET FEATURE for Device*/
    else if (RequestNo == SET_FEATURE)
    {
      if ((pInformation->USBwValue0 == DEVICE_REMOTE_WAKEUP)
          && (pInformation->USBwIndex == 0)
          && (ValBit(pInformation->Current_Feature, 5)))
      {
        Result = Standard_SetDeviceFeature();
      }
      else
      {
        Result = USB_UNSUPPORT;
      }
    }
    /*Clear FEATURE for Device */
    else if (RequestNo == CLEAR_FEATURE)
    {
      if (pInformation->USBwValue0 == DEVICE_REMOTE_WAKEUP
          && pInformation->USBwIndex == 0
          && ValBit(pInformation->Current_Feature, 5))
      {
        Result = Standard_ClearFeature();
      }
      else
      {
        Result = USB_UNSUPPORT;
      }
    }

  }

  /* Interface Request*/
  else if (Type_Recipient == (STANDARD_REQUEST | INTERFACE_RECIPIENT))
  {
    /*SET INTERFACE*/
    if (RequestNo == SET_INTERFACE)
    {
      Result = Standard_SetInterface();
    }
  }

  /* EndPoint Request*/
  else if (Type_Recipient == (STANDARD_REQUEST | ENDPOINT_RECIPIENT))
  {
    /*CLEAR FEATURE for EndPoint*/
    if (RequestNo == CLEAR_FEATURE)
    {
      Result = Standard_ClearFeature();
    }
    /* SET FEATURE for EndPoint*/
    else if (RequestNo == SET_FEATURE)
    {
      Result = Standard_SetEndPointFeature();
    }
  }
  else
  {
    Result = USB_UNSUPPORT;
  }


  if (Result != USB_SUCCESS)
  {
    Result = (*pProperty->Class_NoData_Setup)(RequestNo);
    if (Result == USB_NOT_READY)
    {
      ControlState = PAUSE;
      goto exit_NoData_Setup0;
    }
  }

  if (Result != USB_SUCCESS)
  {
    ControlState = STALLED;
    goto exit_NoData_Setup0;
  }

  ControlState = WAIT_STATUS_IN;/* After no data stage SETUP */

  USB_StatusIn();

exit_NoData_Setup0:
  pInformation->ControlState = ControlState;
  return;
}

/*******************************************************************************
* Function Name  : Data_Setup0.
* Description    : Proceed the processing of setup request with data stage.
* Input          : None.
* Output         : None.
* Return         : None.
*******************************************************************************/
void Data_Setup0(void)
{
  u8 *(*CopyRoutine)(u16);
  RESULT Result;
  u32 Request_No = pInformation->USBbRequest;

  u32 Related_Endpoint, Reserved;
  u32 wOffset, Status;