USBD_REQ_Exported_FunctionsPrototype

Collaboration diagram for USBD_REQ_Exported_FunctionsPrototype:

Functions
USBD_StatusTypeDef	USBD_StdDevReq (USBD_HandleTypeDef *pdev, USBD_SetupReqTypedef *req)
	USBD_StdDevReq Handle standard usb device requests. More...
USBD_StatusTypeDef	USBD_StdItfReq (USBD_HandleTypeDef *pdev, USBD_SetupReqTypedef *req)
	USBD_StdItfReq Handle standard usb interface requests. More...
USBD_StatusTypeDef	USBD_StdEPReq (USBD_HandleTypeDef *pdev, USBD_SetupReqTypedef *req)
	USBD_StdEPReq Handle standard usb endpoint requests. More...
void	USBD_CtlError (USBD_HandleTypeDef *pdev, USBD_SetupReqTypedef *req)
	USBD_CtlError Handle USB low level Error. More...
void	USBD_ParseSetupRequest (USBD_SetupReqTypedef *req, uint8_t *pdata)
	USBD_ParseSetupRequest Copy buffer into setup structure. More...
void	USBD_GetString (uint8_t *desc, uint8_t *unicode, uint16_t *len)
	USBD_GetString Convert Ascii string into unicode one. More...

Detailed Description

Function Documentation

USBD_StdDevReq()

USBD_StatusTypeDef USBD_StdDevReq	(	USBD_HandleTypeDef *	pdev,
		USBD_SetupReqTypedef *	req
	)

USBD_StdDevReq Handle standard usb device requests.

Parameters

pdev	device instance
req	usb request

Return values

status

{
  USBD_StatusTypeDef ret = USBD_OK;
 
  switch (req->bRequest)
  {
  case USB_REQ_GET_DESCRIPTOR:
 
    USBD_GetDescriptor (pdev, req) ;
    break;
 
  case USB_REQ_SET_ADDRESS:
    USBD_SetAddress(pdev, req);
    break;
 
  case USB_REQ_SET_CONFIGURATION:
    USBD_SetConfig (pdev , req);
    break;
 
  case USB_REQ_GET_CONFIGURATION:
    USBD_GetConfig (pdev , req);
    break;
 
  case USB_REQ_GET_STATUS:
    USBD_GetStatus (pdev , req);
    break;
 
 
  case USB_REQ_SET_FEATURE:
    USBD_SetFeature (pdev , req);
    break;
 
  case USB_REQ_CLEAR_FEATURE:
    USBD_ClrFeature (pdev , req);
    break;
 
  default:
    USBD_CtlError(pdev , req);
    break;
  }
 
  return ret;
}

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USBD_StdItfReq()

USBD_StatusTypeDef USBD_StdItfReq	(	USBD_HandleTypeDef *	pdev,
		USBD_SetupReqTypedef *	req
	)

USBD_StdItfReq Handle standard usb interface requests.

Parameters

pdev	device instance
req	usb request

Return values

status

{
  USBD_StatusTypeDef ret = USBD_OK;
 
  switch (pdev->dev_state)
  {
  case USBD_STATE_CONFIGURED:
 
    if (LOBYTE(req->wIndex) <= USBD_MAX_NUM_INTERFACES)
    {
      pdev->pClass->Setup (pdev, req);
 
      if((req->wLength == 0)&& (ret == USBD_OK))
      {
         USBD_CtlSendStatus(pdev);
      }
    }
    else
    {
       USBD_CtlError(pdev , req);
    }
    break;
 
  default:
     USBD_CtlError(pdev , req);
    break;
  }
  return USBD_OK;
}

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USBD_StdEPReq()

USBD_StatusTypeDef USBD_StdEPReq	(	USBD_HandleTypeDef *	pdev,
		USBD_SetupReqTypedef *	req
	)

USBD_StdEPReq Handle standard usb endpoint requests.

Parameters

pdev	device instance
req	usb request

Return values

status

{
 
  uint8_t   ep_addr;
  USBD_StatusTypeDef ret = USBD_OK;
  USBD_EndpointTypeDef   *pep;
  ep_addr  = LOBYTE(req->wIndex);
 
  /* Check if it is a class request */
  if ((req->bmRequest & 0x60) == 0x20)
  {
    pdev->pClass->Setup (pdev, req);
 
    return USBD_OK;
  }
 
  switch (req->bRequest)
  {
 
  case USB_REQ_SET_FEATURE :
 
    switch (pdev->dev_state)
    {
    case USBD_STATE_ADDRESSED:
      if ((ep_addr != 0x00) && (ep_addr != 0x80))
      {
        USBD_LL_StallEP(pdev , ep_addr);
      }
      break;
 
    case USBD_STATE_CONFIGURED:
      if (req->wValue == USB_FEATURE_EP_HALT)
      {
        if ((ep_addr != 0x00) && (ep_addr != 0x80))
        {
          USBD_LL_StallEP(pdev , ep_addr);
 
        }
      }
      pdev->pClass->Setup (pdev, req);
      USBD_CtlSendStatus(pdev);
 
      break;
 
    default:
      USBD_CtlError(pdev , req);
      break;
    }
    break;
 
  case USB_REQ_CLEAR_FEATURE :
 
    switch (pdev->dev_state)
    {
    case USBD_STATE_ADDRESSED:
      if ((ep_addr != 0x00) && (ep_addr != 0x80))
      {
        USBD_LL_StallEP(pdev , ep_addr);
      }
      break;
 
    case USBD_STATE_CONFIGURED:
      if (req->wValue == USB_FEATURE_EP_HALT)
      {
        if ((ep_addr & 0x7F) != 0x00)
        {
          USBD_LL_ClearStallEP(pdev , ep_addr);
          pdev->pClass->Setup (pdev, req);
        }
        USBD_CtlSendStatus(pdev);
      }
      break;
 
    default:
      USBD_CtlError(pdev , req);
      break;
    }
    break;
 
  case USB_REQ_GET_STATUS:
    switch (pdev->dev_state)
    {
    case USBD_STATE_ADDRESSED:
      if ((ep_addr & 0x7F) != 0x00)
      {
        USBD_LL_StallEP(pdev , ep_addr);
      }
      break;
 
    case USBD_STATE_CONFIGURED:
      pep = ((ep_addr & 0x80) == 0x80) ? &pdev->ep_in[ep_addr & 0x7F]:\
                                         &pdev->ep_out[ep_addr & 0x7F];
      if(USBD_LL_IsStallEP(pdev, ep_addr))
      {
        pep->status = 0x0001;
      }
      else
      {
        pep->status = 0x0000;
      }
 
      USBD_CtlSendData (pdev,
                        (uint8_t *)&pep->status,
                        2);
      break;
 
    default:
      USBD_CtlError(pdev , req);
      break;
    }
    break;
 
  default:
    break;
  }
  return ret;
}

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USBD_CtlError()

void USBD_CtlError	(	USBD_HandleTypeDef *	pdev,
		USBD_SetupReqTypedef *	req
	)

USBD_CtlError Handle USB low level Error.

Parameters

pdev	device instance
req	usb request

Return values

None

{
  USBD_LL_StallEP(pdev , 0x80);
  USBD_LL_StallEP(pdev , 0);
}

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USBD_ParseSetupRequest()

void USBD_ParseSetupRequest	(	USBD_SetupReqTypedef *	req,
		uint8_t *	pdata
	)

USBD_ParseSetupRequest Copy buffer into setup structure.

Parameters

pdev	device instance
req	usb request

Return values

None

{
  req->bmRequest     = *(uint8_t *)  (pdata);
  req->bRequest      = *(uint8_t *)  (pdata +  1);
  req->wValue        = SWAPBYTE      (pdata +  2);
  req->wIndex        = SWAPBYTE      (pdata +  4);
  req->wLength       = SWAPBYTE      (pdata +  6);
 
}

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USBD_GetString()

void USBD_GetString	(	uint8_t *	desc,
		uint8_t *	unicode,
		uint16_t *	len
	)

USBD_GetString Convert Ascii string into unicode one.

Parameters

desc	: descriptor buffer
unicode	: Formatted string buffer (unicode)
len	: descriptor length

Return values

None

{
  uint8_t idx = 0;
 
  if (desc != NULL)
  {
    *len =  USBD_GetLen(desc) * 2 + 2;
    unicode[idx++] = *len;
    unicode[idx++] =  USB_DESC_TYPE_STRING;
 
    while (*desc != '\0')
    {
      unicode[idx++] = *desc++;
      unicode[idx++] =  0x00;
    }
  }
}

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