/**
* @brief CDC_Handle
* The function is for managing state machine for CDC data transfers
* @param pdev: Selected device
* @param hdev: Selected device property
* @retval USBH_Status
*/
static USBH_Status CDC_Handle(USB_OTG_CORE_HANDLE *pdev ,
void *phost)
{
USBH_Status status = USBH_OK;
USBH_HOST *pphost = phost;
/* Call Application process */
pphost->usr_cb->UserApplication();
/*Handle the transmission */
CDC_ProcessTransmission(pdev, pphost);
/*Always send in packet to device*/
CDC_ProcessReception(pdev, pphost);
return status;
}
/**
* @brief USBH_CDC_Process
* The function is for managing state machine for CDC data transfers
* @param phost: Host handle
* @retval USBH Status
*/
static USBH_StatusTypeDef USBH_CDC_Process (USBH_HandleTypeDef *phost)
{
USBH_StatusTypeDef status = USBH_BUSY;
USBH_StatusTypeDef req_status = USBH_OK;
CDC_HandleTypeDef *CDC_Handle = (CDC_HandleTypeDef*) phost->pActiveClass->pData;
switch(CDC_Handle->state)
{
case CDC_IDLE_STATE:
status = USBH_OK;
break;
case CDC_SET_LINE_CODING_STATE:
req_status = SetLineCoding(phost, CDC_Handle->pUserLineCoding);
if(req_status == USBH_OK)
{
CDC_Handle->state = CDC_GET_LAST_LINE_CODING_STATE;
}
else if(req_status != USBH_BUSY)
{
CDC_Handle->state = CDC_ERROR_STATE;
}
break;
case CDC_GET_LAST_LINE_CODING_STATE:
req_status = GetLineCoding(phost, &(CDC_Handle->LineCoding));
if(req_status == USBH_OK)
{
CDC_Handle->state = CDC_IDLE_STATE;
if((CDC_Handle->LineCoding.b.bCharFormat == CDC_Handle->pUserLineCoding->b.bCharFormat) &&
(CDC_Handle->LineCoding.b.bDataBits == CDC_Handle->pUserLineCoding->b.bDataBits) &&
(CDC_Handle->LineCoding.b.bParityType == CDC_Handle->pUserLineCoding->b.bParityType) &&
(CDC_Handle->LineCoding.b.dwDTERate == CDC_Handle->pUserLineCoding->b.dwDTERate))
{
USBH_CDC_LineCodingChanged(phost);
}
}
else if(req_status != USBH_BUSY)
{
CDC_Handle->state = CDC_ERROR_STATE;
}
break;
case CDC_TRANSFER_DATA:
CDC_ProcessTransmission(phost);
CDC_ProcessReception(phost);
break;
case CDC_ERROR_STATE:
req_status = USBH_ClrFeature(phost, 0x00);
if(req_status == USBH_OK )
{
/*Change the state to waiting*/
CDC_Handle->state = CDC_IDLE_STATE ;
}
break;
default:
break;
}
return status;
}
