diff options
Diffstat (limited to 'stmhal/usbhost/Class/CDC/Src/usbh_cdc.c')
| -rw-r--r-- | stmhal/usbhost/Class/CDC/Src/usbh_cdc.c | 755 |
1 files changed, 755 insertions, 0 deletions
diff --git a/stmhal/usbhost/Class/CDC/Src/usbh_cdc.c b/stmhal/usbhost/Class/CDC/Src/usbh_cdc.c new file mode 100644 index 000000000..250e1fc7b --- /dev/null +++ b/stmhal/usbhost/Class/CDC/Src/usbh_cdc.c @@ -0,0 +1,755 @@ +/**
+ ******************************************************************************
+ * @file usbh_cdc.c
+ * @author MCD Application Team
+ * @version V3.0.0
+ * @date 18-February-2014
+ * @brief This file is the CDC Layer Handlers for USB Host CDC class.
+ *
+ * @verbatim
+ *
+ * ===================================================================
+ * CDC Class Description
+ * ===================================================================
+ * This module manages the MSC class V1.11 following the "Device Class Definition
+ * for Human Interface Devices (CDC) Version 1.11 Jun 27, 2001".
+ * This driver implements the following aspects of the specification:
+ * - The Boot Interface Subclass
+ * - The Mouse and Keyboard protocols
+ *
+ * @endverbatim
+ *
+ ******************************************************************************
+ * @attention
+ *
+ * <h2><center>© COPYRIGHT 2014 STMicroelectronics</center></h2>
+ *
+ * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
+ * You may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.st.com/software_license_agreement_liberty_v2
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ ******************************************************************************
+ */
+
+/* Includes ------------------------------------------------------------------*/
+#include "usbh_cdc.h"
+
+/** @addtogroup USBH_LIB
+* @{
+*/
+
+/** @addtogroup USBH_CLASS
+* @{
+*/
+
+/** @addtogroup USBH_CDC_CLASS
+* @{
+*/
+
+/** @defgroup USBH_CDC_CORE
+* @brief This file includes CDC Layer Handlers for USB Host CDC class.
+* @{
+*/
+
+/** @defgroup USBH_CDC_CORE_Private_TypesDefinitions
+* @{
+*/
+/**
+* @}
+*/
+
+
+/** @defgroup USBH_CDC_CORE_Private_Defines
+* @{
+*/
+#define USBH_CDC_BUFFER_SIZE 1024
+/**
+* @}
+*/
+
+
+/** @defgroup USBH_CDC_CORE_Private_Macros
+* @{
+*/
+/**
+* @}
+*/
+
+
+/** @defgroup USBH_CDC_CORE_Private_Variables
+* @{
+*/
+/**
+* @}
+*/
+
+
+/** @defgroup USBH_CDC_CORE_Private_FunctionPrototypes
+* @{
+*/
+
+static USBH_StatusTypeDef USBH_CDC_InterfaceInit (USBH_HandleTypeDef *phost);
+
+static USBH_StatusTypeDef USBH_CDC_InterfaceDeInit (USBH_HandleTypeDef *phost);
+
+static USBH_StatusTypeDef USBH_CDC_Process(USBH_HandleTypeDef *phost);
+
+static USBH_StatusTypeDef USBH_CDC_SOFProcess(USBH_HandleTypeDef *phost);
+
+static USBH_StatusTypeDef USBH_CDC_ClassRequest (USBH_HandleTypeDef *phost);
+
+static USBH_StatusTypeDef GetLineCoding(USBH_HandleTypeDef *phost,
+ CDC_LineCodingTypeDef *linecoding);
+
+static USBH_StatusTypeDef SetLineCoding(USBH_HandleTypeDef *phost,
+ CDC_LineCodingTypeDef *linecoding);
+
+static void CDC_ProcessTransmission(USBH_HandleTypeDef *phost);
+
+static void CDC_ProcessReception(USBH_HandleTypeDef *phost);
+
+USBH_ClassTypeDef CDC_Class =
+{
+ "CDC",
+ USB_CDC_CLASS,
+ USBH_CDC_InterfaceInit,
+ USBH_CDC_InterfaceDeInit,
+ USBH_CDC_ClassRequest,
+ USBH_CDC_Process,
+ USBH_CDC_SOFProcess,
+ NULL,
+};
+/**
+* @}
+*/
+
+
+/** @defgroup USBH_CDC_CORE_Private_Functions
+* @{
+*/
+
+/**
+ * @brief USBH_CDC_InterfaceInit
+ * The function init the CDC class.
+ * @param phost: Host handle
+ * @retval USBH Status
+ */
+static USBH_StatusTypeDef USBH_CDC_InterfaceInit (USBH_HandleTypeDef *phost)
+{
+
+ USBH_StatusTypeDef status = USBH_FAIL ;
+ uint8_t interface;
+ CDC_HandleTypeDef *CDC_Handle;
+
+ interface = USBH_FindInterface(phost,
+ COMMUNICATION_INTERFACE_CLASS_CODE,
+ ABSTRACT_CONTROL_MODEL,
+ COMMON_AT_COMMAND);
+
+ if(interface == 0xFF) /* No Valid Interface */
+ {
+ USBH_DbgLog ("Cannot Find the interface for Communication Interface Class.", phost->pActiveClass->Name);
+ }
+ else
+ {
+ USBH_SelectInterface (phost, interface);
+ phost->pActiveClass->pData = (CDC_HandleTypeDef *)USBH_malloc (sizeof(CDC_HandleTypeDef));
+ CDC_Handle = phost->pActiveClass->pData;
+
+ /*Collect the notification endpoint address and length*/
+ if(phost->device.CfgDesc.Itf_Desc[interface].Ep_Desc[0].bEndpointAddress & 0x80)
+ {
+ CDC_Handle->CommItf.NotifEp = phost->device.CfgDesc.Itf_Desc[interface].Ep_Desc[0].bEndpointAddress;
+ CDC_Handle->CommItf.NotifEpSize = phost->device.CfgDesc.Itf_Desc[interface].Ep_Desc[0].wMaxPacketSize;
+ }
+
+ /*Allocate the length for host channel number in*/
+ CDC_Handle->CommItf.NotifPipe = USBH_AllocPipe(phost, CDC_Handle->CommItf.NotifEp);
+
+ /* Open pipe for Notification endpoint */
+ USBH_OpenPipe (phost,
+ CDC_Handle->CommItf.NotifPipe,
+ CDC_Handle->CommItf.NotifEp,
+ phost->device.address,
+ phost->device.speed,
+ USB_EP_TYPE_INTR,
+ CDC_Handle->CommItf.NotifEpSize);
+
+ USBH_LL_SetToggle (phost, CDC_Handle->CommItf.NotifPipe, 0);
+
+ interface = USBH_FindInterface(phost,
+ DATA_INTERFACE_CLASS_CODE,
+ RESERVED,
+ NO_CLASS_SPECIFIC_PROTOCOL_CODE);
+
+ if(interface == 0xFF) /* No Valid Interface */
+ {
+ USBH_DbgLog ("Cannot Find the interface for Data Interface Class.", phost->pActiveClass->Name);
+ }
+ else
+ {
+ /*Collect the class specific endpoint address and length*/
+ if(phost->device.CfgDesc.Itf_Desc[interface].Ep_Desc[0].bEndpointAddress & 0x80)
+ {
+ CDC_Handle->DataItf.InEp = phost->device.CfgDesc.Itf_Desc[interface].Ep_Desc[0].bEndpointAddress;
+ CDC_Handle->DataItf.InEpSize = phost->device.CfgDesc.Itf_Desc[interface].Ep_Desc[0].wMaxPacketSize;
+ }
+ else
+ {
+ CDC_Handle->DataItf.OutEp = phost->device.CfgDesc.Itf_Desc[interface].Ep_Desc[0].bEndpointAddress;
+ CDC_Handle->DataItf.OutEpSize = phost->device.CfgDesc.Itf_Desc[interface].Ep_Desc[0].wMaxPacketSize;
+ }
+
+ if(phost->device.CfgDesc.Itf_Desc[interface].Ep_Desc[1].bEndpointAddress & 0x80)
+ {
+ CDC_Handle->DataItf.InEp = phost->device.CfgDesc.Itf_Desc[interface].Ep_Desc[1].bEndpointAddress;
+ CDC_Handle->DataItf.InEpSize = phost->device.CfgDesc.Itf_Desc[interface].Ep_Desc[1].wMaxPacketSize;
+ }
+ else
+ {
+ CDC_Handle->DataItf.OutEp = phost->device.CfgDesc.Itf_Desc[interface].Ep_Desc[1].bEndpointAddress;
+ CDC_Handle->DataItf.OutEpSize = phost->device.CfgDesc.Itf_Desc[interface].Ep_Desc[1].wMaxPacketSize;
+ }
+
+ /*Allocate the length for host channel number out*/
+ CDC_Handle->DataItf.OutPipe = USBH_AllocPipe(phost, CDC_Handle->DataItf.OutEp);
+
+ /*Allocate the length for host channel number in*/
+ CDC_Handle->DataItf.InPipe = USBH_AllocPipe(phost, CDC_Handle->DataItf.InEp);
+
+ /* Open channel for OUT endpoint */
+ USBH_OpenPipe (phost,
+ CDC_Handle->DataItf.OutPipe,
+ CDC_Handle->DataItf.OutEp,
+ phost->device.address,
+ phost->device.speed,
+ USB_EP_TYPE_BULK,
+ CDC_Handle->DataItf.OutEpSize);
+ /* Open channel for IN endpoint */
+ USBH_OpenPipe (phost,
+ CDC_Handle->DataItf.InPipe,
+ CDC_Handle->DataItf.InEp,
+ phost->device.address,
+ phost->device.speed,
+ USB_EP_TYPE_BULK,
+ CDC_Handle->DataItf.InEpSize);
+
+ CDC_Handle->state = CDC_IDLE_STATE;
+
+ USBH_LL_SetToggle (phost, CDC_Handle->DataItf.OutPipe,0);
+ USBH_LL_SetToggle (phost, CDC_Handle->DataItf.InPipe,0);
+ status = USBH_OK;
+ }
+ }
+ return status;
+}
+
+
+
+/**
+ * @brief USBH_CDC_InterfaceDeInit
+ * The function DeInit the Pipes used for the CDC class.
+ * @param phost: Host handle
+ * @retval USBH Status
+ */
+USBH_StatusTypeDef USBH_CDC_InterfaceDeInit (USBH_HandleTypeDef *phost)
+{
+ CDC_HandleTypeDef *CDC_Handle = phost->pActiveClass->pData;
+
+ if ( CDC_Handle->CommItf.NotifPipe)
+ {
+ USBH_ClosePipe(phost, CDC_Handle->CommItf.NotifPipe);
+ USBH_FreePipe (phost, CDC_Handle->CommItf.NotifPipe);
+ CDC_Handle->CommItf.NotifPipe = 0; /* Reset the Channel as Free */
+ }
+
+ if ( CDC_Handle->DataItf.InPipe)
+ {
+ USBH_ClosePipe(phost, CDC_Handle->DataItf.InPipe);
+ USBH_FreePipe (phost, CDC_Handle->DataItf.InPipe);
+ CDC_Handle->DataItf.InPipe = 0; /* Reset the Channel as Free */
+ }
+
+ if ( CDC_Handle->DataItf.OutPipe)
+ {
+ USBH_ClosePipe(phost, CDC_Handle->DataItf.OutPipe);
+ USBH_FreePipe (phost, CDC_Handle->DataItf.OutPipe);
+ CDC_Handle->DataItf.OutPipe = 0; /* Reset the Channel as Free */
+ }
+
+ if(phost->pActiveClass->pData)
+ {
+ USBH_free (phost->pActiveClass->pData);
+ phost->pActiveClass->pData = 0;
+ }
+
+ return USBH_OK;
+}
+
+/**
+ * @brief USBH_CDC_ClassRequest
+ * The function is responsible for handling Standard requests
+ * for CDC class.
+ * @param phost: Host handle
+ * @retval USBH Status
+ */
+static USBH_StatusTypeDef USBH_CDC_ClassRequest (USBH_HandleTypeDef *phost)
+{
+ USBH_StatusTypeDef status = USBH_FAIL ;
+ CDC_HandleTypeDef *CDC_Handle = phost->pActiveClass->pData;
+
+ /*Issue the get line coding request*/
+ status = GetLineCoding(phost, &CDC_Handle->LineCoding);
+ if(status == USBH_OK)
+ {
+ phost->pUser(phost, HOST_USER_CLASS_ACTIVE);
+ }
+ 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 = 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;
+}
+
+/**
+ * @brief USBH_CDC_SOFProcess
+ * The function is for managing SOF callback
+ * @param phost: Host handle
+ * @retval USBH Status
+ */
+static USBH_StatusTypeDef USBH_CDC_SOFProcess (USBH_HandleTypeDef *phost)
+{
+ return USBH_OK;
+}
+
+
+ /**
+ * @brief USBH_CDC_Stop
+ * Stop current CDC Transmission
+ * @param phost: Host handle
+ * @retval USBH Status
+ */
+USBH_StatusTypeDef USBH_CDC_Stop(USBH_HandleTypeDef *phost)
+{
+ CDC_HandleTypeDef *CDC_Handle = phost->pActiveClass->pData;
+
+ if(phost->gState == HOST_CLASS)
+ {
+ CDC_Handle->state = CDC_IDLE_STATE;
+
+ USBH_ClosePipe(phost, CDC_Handle->CommItf.NotifPipe);
+ USBH_ClosePipe(phost, CDC_Handle->DataItf.InPipe);
+ USBH_ClosePipe(phost, CDC_Handle->DataItf.OutPipe);
+ }
+ return USBH_OK;
+}
+/**
+ * @brief This request allows the host to find out the currently
+ * configured line coding.
+ * @param pdev: Selected device
+ * @retval USBH_StatusTypeDef : USB ctl xfer status
+ */
+static USBH_StatusTypeDef GetLineCoding(USBH_HandleTypeDef *phost, CDC_LineCodingTypeDef *linecoding)
+{
+
+ phost->Control.setup.b.bmRequestType = USB_D2H | USB_REQ_TYPE_CLASS | \
+ USB_REQ_RECIPIENT_INTERFACE;
+
+ phost->Control.setup.b.bRequest = CDC_GET_LINE_CODING;
+ phost->Control.setup.b.wValue.w = 0;
+ phost->Control.setup.b.wIndex.w = 0;
+ phost->Control.setup.b.wLength.w = LINE_CODING_STRUCTURE_SIZE;
+
+ return USBH_CtlReq(phost, linecoding->Array, LINE_CODING_STRUCTURE_SIZE);
+}
+
+
+/**
+ * @brief This request allows the host to specify typical asynchronous
+ * line-character formatting properties
+ * This request applies to asynchronous byte stream data class interfaces
+ * and endpoints
+ * @param pdev: Selected device
+ * @retval USBH_StatusTypeDef : USB ctl xfer status
+ */
+static USBH_StatusTypeDef SetLineCoding(USBH_HandleTypeDef *phost, CDC_LineCodingTypeDef *linecodin)
+{
+ phost->Control.setup.b.bmRequestType = USB_H2D | USB_REQ_TYPE_CLASS | \
+ USB_REQ_RECIPIENT_INTERFACE;
+
+ phost->Control.setup.b.bRequest = CDC_SET_LINE_CODING;
+ phost->Control.setup.b.wValue.w = 0;
+
+ phost->Control.setup.b.wIndex.w = 0;
+
+ phost->Control.setup.b.wLength.w = LINE_CODING_STRUCTURE_SIZE;
+
+ return USBH_CtlReq(phost, linecodin->Array , LINE_CODING_STRUCTURE_SIZE );
+}
+
+/**
+* @brief This function prepares the state before issuing the class specific commands
+* @param None
+* @retval None
+*/
+USBH_StatusTypeDef USBH_CDC_SetLineCoding(USBH_HandleTypeDef *phost, CDC_LineCodingTypeDef *linecodin)
+{
+ CDC_HandleTypeDef *CDC_Handle = phost->pActiveClass->pData;
+ if(phost->gState == HOST_CLASS)
+ {
+ CDC_Handle->state = CDC_SET_LINE_CODING_STATE;
+ CDC_Handle->pUserLineCoding = linecodin;
+
+#if (USBH_USE_OS == 1)
+ osMessagePut ( phost->os_event, USBH_CLASS_EVENT, 0);
+#endif
+ }
+ return USBH_OK;
+}
+
+/**
+* @brief This function prepares the state before issuing the class specific commands
+* @param None
+* @retval None
+*/
+USBH_StatusTypeDef USBH_CDC_GetLineCoding(USBH_HandleTypeDef *phost, CDC_LineCodingTypeDef *linecodin)
+{
+ CDC_HandleTypeDef *CDC_Handle = phost->pActiveClass->pData;
+
+ if((phost->gState == HOST_CLASS) ||(phost->gState == HOST_CLASS_REQUEST))
+ {
+ *linecodin = CDC_Handle->LineCoding;
+ return USBH_OK;
+ }
+ else
+ {
+ return USBH_FAIL;
+ }
+}
+
+/**
+ * @brief This function return last recieved data size
+ * @param None
+ * @retval None
+ */
+uint16_t USBH_CDC_GetLastReceivedDataSize(USBH_HandleTypeDef *phost)
+{
+ CDC_HandleTypeDef *CDC_Handle = phost->pActiveClass->pData;
+
+ if(phost->gState == HOST_CLASS)
+ {
+ return USBH_LL_GetLastXferSize(phost, CDC_Handle->DataItf.InPipe);;
+ }
+ else
+ {
+ return 0;
+ }
+}
+
+/**
+ * @brief This function prepares the state before issuing the class specific commands
+ * @param None
+ * @retval None
+ */
+USBH_StatusTypeDef USBH_CDC_Transmit(USBH_HandleTypeDef *phost, uint8_t *pbuff, uint32_t length)
+{
+ USBH_StatusTypeDef Status = USBH_BUSY;
+ CDC_HandleTypeDef *CDC_Handle = phost->pActiveClass->pData;
+
+ if((CDC_Handle->state == CDC_IDLE_STATE) || (CDC_Handle->state == CDC_TRANSFER_DATA))
+ {
+ CDC_Handle->pTxData = pbuff;
+ CDC_Handle->TxDataLength = length;
+ CDC_Handle->state = CDC_TRANSFER_DATA;
+ CDC_Handle->data_tx_state = CDC_SEND_DATA;
+ Status = USBH_OK;
+ }
+ return Status;
+}
+
+
+/**
+* @brief This function prepares the state before issuing the class specific commands
+* @param None
+* @retval None
+*/
+USBH_StatusTypeDef USBH_CDC_Receive(USBH_HandleTypeDef *phost, uint8_t *pbuff, uint32_t length)
+{
+ USBH_StatusTypeDef Status = USBH_BUSY;
+ CDC_HandleTypeDef *CDC_Handle = phost->pActiveClass->pData;
+
+ if((CDC_Handle->state == CDC_IDLE_STATE) || (CDC_Handle->state == CDC_TRANSFER_DATA))
+ {
+ CDC_Handle->pRxData = pbuff;
+ CDC_Handle->RxDataLength = length;
+ CDC_Handle->state = CDC_TRANSFER_DATA;
+ CDC_Handle->data_rx_state = CDC_RECEIVE_DATA;
+ Status = USBH_OK;
+ }
+ return Status;
+}
+
+/**
+* @brief The function is responsible for sending data to the device
+* @param pdev: Selected device
+* @retval None
+*/
+static void CDC_ProcessTransmission(USBH_HandleTypeDef *phost)
+{
+ CDC_HandleTypeDef *CDC_Handle = phost->pActiveClass->pData;
+ USBH_URBStateTypeDef URB_Status = USBH_URB_IDLE;
+
+ switch(CDC_Handle->data_tx_state)
+ {
+
+ case CDC_SEND_DATA:
+ if(CDC_Handle->TxDataLength > CDC_Handle->DataItf.OutEpSize)
+ {
+ USBH_BulkSendData (phost,
+ CDC_Handle->pTxData,
+ CDC_Handle->DataItf.OutEpSize,
+ CDC_Handle->DataItf.OutPipe,
+ 1);
+ }
+ else
+ {
+ USBH_BulkSendData (phost,
+ CDC_Handle->pTxData,
+ CDC_Handle->TxDataLength,
+ CDC_Handle->DataItf.OutPipe,
+ 1);
+ }
+
+ CDC_Handle->data_tx_state = CDC_SEND_DATA_WAIT;
+
+ break;
+
+ case CDC_SEND_DATA_WAIT:
+
+ URB_Status = USBH_LL_GetURBState(phost, CDC_Handle->DataItf.OutPipe);
+
+ /*Check the status done for transmssion*/
+ if(URB_Status == USBH_URB_DONE )
+ {
+ if(CDC_Handle->TxDataLength > CDC_Handle->DataItf.OutEpSize)
+ {
+ CDC_Handle->TxDataLength -= CDC_Handle->DataItf.OutEpSize ;
+ CDC_Handle->pTxData += CDC_Handle->DataItf.OutEpSize;
+ }
+ else
+ {
+ CDC_Handle->TxDataLength = 0;
+ }
+
+ if( CDC_Handle->TxDataLength > 0)
+ {
+ CDC_Handle->data_tx_state = CDC_SEND_DATA;
+ }
+ else
+ {
+ CDC_Handle->data_tx_state = CDC_IDLE;
+ USBH_CDC_TransmitCallback(phost);
+
+ }
+ }
+ else if( URB_Status == USBH_URB_NOTREADY )
+ {
+ CDC_Handle->data_tx_state = CDC_SEND_DATA;
+ }
+ break;
+ default:
+ break;
+ }
+}
+/**
+* @brief This function responsible for reception of data from the device
+* @param pdev: Selected device
+* @retval None
+*/
+
+static void CDC_ProcessReception(USBH_HandleTypeDef *phost)
+{
+ CDC_HandleTypeDef *CDC_Handle = phost->pActiveClass->pData;
+ USBH_URBStateTypeDef URB_Status = USBH_URB_IDLE;
+ uint16_t length;
+
+ switch(CDC_Handle->data_rx_state)
+ {
+
+ case CDC_RECEIVE_DATA:
+
+ USBH_BulkReceiveData (phost,
+ CDC_Handle->pRxData,
+ CDC_Handle->DataItf.InEpSize,
+ CDC_Handle->DataItf.InPipe);
+
+ CDC_Handle->data_rx_state = CDC_RECEIVE_DATA_WAIT;
+
+ break;
+
+ case CDC_RECEIVE_DATA_WAIT:
+
+ URB_Status = USBH_LL_GetURBState(phost, CDC_Handle->DataItf.InPipe);
+
+ /*Check the status done for reception*/
+ if(URB_Status == USBH_URB_DONE )
+ {
+ length = USBH_LL_GetLastXferSize(phost, CDC_Handle->DataItf.InPipe);
+
+ if(((CDC_Handle->RxDataLength - length) > 0) && (length > CDC_Handle->DataItf.InEpSize))
+ {
+ CDC_Handle->RxDataLength -= length ;
+ CDC_Handle->pRxData += length;
+ CDC_Handle->data_rx_state = CDC_RECEIVE_DATA;
+ }
+ else
+ {
+ CDC_Handle->data_rx_state = CDC_IDLE;
+ USBH_CDC_ReceiveCallback(phost);
+ }
+ }
+ break;
+
+ default:
+ break;
+ }
+}
+
+/**
+* @brief The function informs user that data have been received
+* @param pdev: Selected device
+* @retval None
+*/
+__weak void USBH_CDC_TransmitCallback(USBH_HandleTypeDef *phost)
+{
+
+}
+
+ /**
+* @brief The function informs user that data have been sent
+* @param pdev: Selected device
+* @retval None
+*/
+__weak void USBH_CDC_ReceiveCallback(USBH_HandleTypeDef *phost)
+{
+
+}
+
+ /**
+* @brief The function informs user that Settings have been changed
+* @param pdev: Selected device
+* @retval None
+*/
+__weak void USBH_CDC_LineCodingChanged(USBH_HandleTypeDef *phost)
+{
+
+}
+
+/**
+* @}
+*/
+
+/**
+* @}
+*/
+
+/**
+* @}
+*/
+
+
+/**
+* @}
+*/
+
+
+/**
+* @}
+*/
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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