Yuan Cao
USB CDC library for MBED on STM32
Diff: usbd_cdc.c
- Revision:
- 0:7cf972f622d3
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/usbd_cdc.c Sun Sep 09 19:03:18 2018 +0000
@@ -0,0 +1,701 @@
+/**
+ ******************************************************************************
+ * @file usbd_cdc.c
+ * @author MCD Application Team
+ * @version V2.4.2
+ * @date 11-December-2015
+ * @brief This file provides the high layer firmware functions to manage the
+ * following functionalities of the USB CDC Class:
+ * - Initialization and Configuration of high and low layer
+ * - Enumeration as CDC Device (and enumeration for each implemented memory interface)
+ * - OUT/IN data transfer
+ * - Command IN transfer (class requests management)
+ * - Error management
+ *
+ * @verbatim
+ *
+ * ===================================================================
+ * CDC Class Driver Description
+ * ===================================================================
+ * This driver manages the "Universal Serial Bus Class Definitions for Communications Devices
+ * Revision 1.2 November 16, 2007" and the sub-protocol specification of "Universal Serial Bus
+ * Communications Class Subclass Specification for PSTN Devices Revision 1.2 February 9, 2007"
+ * This driver implements the following aspects of the specification:
+ * - Device descriptor management
+ * - Configuration descriptor management
+ * - Enumeration as CDC device with 2 data endpoints (IN and OUT) and 1 command endpoint (IN)
+ * - Requests management (as described in section 6.2 in specification)
+ * - Abstract Control Model compliant
+ * - Union Functional collection (using 1 IN endpoint for control)
+ * - Data interface class
+ *
+ * These aspects may be enriched or modified for a specific user application.
+ *
+ * This driver doesn't implement the following aspects of the specification
+ * (but it is possible to manage these features with some modifications on this driver):
+ * - Any class-specific aspect relative to communication classes should be managed by user application.
+ * - All communication classes other than PSTN are not managed
+ *
+ * @endverbatim
+ *
+ ******************************************************************************
+ * @attention
+ *
+ * <h2><center>© COPYRIGHT 2015 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 "usbd_cdc.h"
+#include "usbd_ctlreq.h"
+
+/** @addtogroup STM32_USB_DEVICE_LIBRARY
+ * @{
+ */
+
+/** @defgroup USBD_CDC
+ * @brief usbd core module
+ * @{
+ */
+
+/** @defgroup USBD_CDC_Private_TypesDefinitions
+ * @{
+ */
+/**
+ * @}
+ */
+
+/** @defgroup USBD_CDC_Private_Defines
+ * @{
+ */
+/**
+ * @}
+ */
+
+/** @defgroup USBD_CDC_Private_Macros
+ * @{
+ */
+
+/**
+ * @}
+ */
+
+/** @defgroup USBD_CDC_Private_FunctionPrototypes
+ * @{
+ */
+
+static uint8_t USBD_CDC_Init(USBD_HandleTypeDef *pdev, uint8_t cfgidx);
+
+static uint8_t USBD_CDC_DeInit(USBD_HandleTypeDef *pdev, uint8_t cfgidx);
+
+static uint8_t USBD_CDC_Setup(USBD_HandleTypeDef *pdev,
+ USBD_SetupReqTypedef *req);
+
+static uint8_t USBD_CDC_DataIn(USBD_HandleTypeDef *pdev, uint8_t epnum);
+
+static uint8_t USBD_CDC_DataOut(USBD_HandleTypeDef *pdev, uint8_t epnum);
+
+static uint8_t USBD_CDC_EP0_RxReady(USBD_HandleTypeDef *pdev);
+
+static uint8_t *USBD_CDC_GetFSCfgDesc(uint16_t *length);
+
+static uint8_t *USBD_CDC_GetHSCfgDesc(uint16_t *length);
+
+static uint8_t *USBD_CDC_GetOtherSpeedCfgDesc(uint16_t *length);
+
+static uint8_t *USBD_CDC_GetOtherSpeedCfgDesc(uint16_t *length);
+
+uint8_t *USBD_CDC_GetDeviceQualifierDescriptor(uint16_t *length);
+
+/* USB Standard Device Descriptor */
+__ALIGN_BEGIN static uint8_t USBD_CDC_DeviceQualifierDesc[USB_LEN_DEV_QUALIFIER_DESC] __ALIGN_END
+ =
+ {
+ USB_LEN_DEV_QUALIFIER_DESC,
+ USB_DESC_TYPE_DEVICE_QUALIFIER, 0x00, 0x02, 0x00, 0x00, 0x00, 0x40,
+ 0x01, 0x00, };
+
+/**
+ * @}
+ */
+
+/** @defgroup USBD_CDC_Private_Variables
+ * @{
+ */
+
+/* CDC interface class callbacks structure */
+USBD_ClassTypeDef USBD_CDC =
+{ USBD_CDC_Init, USBD_CDC_DeInit, USBD_CDC_Setup,
+NULL, /* EP0_TxSent, */
+USBD_CDC_EP0_RxReady, USBD_CDC_DataIn, USBD_CDC_DataOut,
+NULL,
+NULL,
+NULL, USBD_CDC_GetHSCfgDesc, USBD_CDC_GetFSCfgDesc,
+ USBD_CDC_GetOtherSpeedCfgDesc, USBD_CDC_GetDeviceQualifierDescriptor, };
+
+/* USB CDC device Configuration Descriptor */
+__ALIGN_BEGIN uint8_t USBD_CDC_CfgDesc[USB_CDC_CONFIG_DESC_SIZ] __ALIGN_END =
+{
+
+//
+ /*Configuration Descriptor*/
+ 0x09, /* bLength: Configuration Descriptor size */
+ USB_DESC_TYPE_CONFIGURATION, /* bDescriptorType: Configuration */
+ USB_CDC_CONFIG_DESC_SIZ, /* wTotalLength:no of returned bytes */
+ 0x00, 0x02, /* bNumInterfaces: 2 interface */
+ 0x01, /* bConfigurationValue: Configuration value */
+ 0x00, /* iConfiguration: Index of string descriptor describing the configuration */
+ 0xC0, /* bmAttributes: self powered */
+ 0x32, /* MaxPower 0 mA */
+
+ /*---------------------------------------------------------------------------*/
+ // IAD to associate the two CDC interfaces
+ 0x08,// bLength
+ 0x0b, // bDescriptorType
+ 0x00, // bFirstInterface
+ 0x02, // bInterfaceCount
+ 0x02, // bFunctionClass
+ 0x02, // bFunctionSubClass
+ 0, // bFunctionProtocol
+ 0, // iFunction
+
+ /*Interface Descriptor */
+ 0x09, /* bLength: Interface Descriptor size */
+ USB_DESC_TYPE_INTERFACE, /* bDescriptorType: Interface */
+ /* Interface descriptor type */
+ 0x00, /* bInterfaceNumber: Number of Interface */
+ 0x00, /* bAlternateSetting: Alternate setting */
+ 0x01, /* bNumEndpoints: One endpoints used */
+ 0x02, /* bInterfaceClass: Communication Interface Class */
+ 0x02, /* bInterfaceSubClass: Abstract Control Model */
+ 0x01, /* bInterfaceProtocol: Common AT commands */
+ 0x00, /* iInterface: */
+
+ /*Header Functional Descriptor*/
+ 0x05, /* bLength: Endpoint Descriptor size */
+ 0x24, /* bDescriptorType: CS_INTERFACE */
+ 0x00, /* bDescriptorSubtype: Header Func Desc */
+ 0x10, /* bcdCDC: spec release number */
+ 0x01,
+
+ /*Call Management Functional Descriptor*/
+ 0x05, /* bFunctionLength */
+ 0x24, /* bDescriptorType: CS_INTERFACE */
+ 0x01, /* bDescriptorSubtype: Call Management Func Desc */
+ 0x03, /* bmCapabilities: D0+D1 */
+ 0x01, /* bDataInterface: 1 */
+
+ /*ACM Functional Descriptor*/
+ 0x04, /* bFunctionLength */
+ 0x24, /* bDescriptorType: CS_INTERFACE */
+ 0x02, /* bDescriptorSubtype: Abstract Control Management desc */
+ 0x02, /* bmCapabilities */
+
+ /*Union Functional Descriptor*/
+ 0x05, /* bFunctionLength */
+ 0x24, /* bDescriptorType: CS_INTERFACE */
+ 0x06, /* bDescriptorSubtype: Union func desc */
+ 0x00, /* bMasterInterface: Communication class interface */
+ 0x01, /* bSlaveInterface0: Data Class Interface */
+
+ /*Endpoint 2 Descriptor*/
+ 0x07, /* bLength: Endpoint Descriptor size */
+ USB_DESC_TYPE_ENDPOINT, /* bDescriptorType: Endpoint */
+ CDC_CMD_EP, /* bEndpointAddress */
+ 0x03, /* bmAttributes: Interrupt */
+ LOBYTE(CDC_CMD_PACKET_SIZE), /* wMaxPacketSize: */
+ HIBYTE(CDC_CMD_PACKET_SIZE), 0x10, /* bInterval: */
+ /*---------------------------------------------------------------------------*/
+
+ /*Data class interface descriptor*/
+ 0x09, /* bLength: Endpoint Descriptor size */
+ USB_DESC_TYPE_INTERFACE, /* bDescriptorType: */
+ 0x01, /* bInterfaceNumber: Number of Interface */
+ 0x00, /* bAlternateSetting: Alternate setting */
+ 0x02, /* bNumEndpoints: Two endpoints used */
+ 0x0A, /* bInterfaceClass: CDC */
+ 0x00, /* bInterfaceSubClass: */
+ 0x00, /* bInterfaceProtocol: */
+ 0x00, /* iInterface: */
+
+ /*Endpoint OUT Descriptor*/
+ 0x07, /* bLength: Endpoint Descriptor size */
+ USB_DESC_TYPE_ENDPOINT, /* bDescriptorType: Endpoint */
+ CDC_OUT_EP, /* bEndpointAddress */
+ 0x02, /* bmAttributes: Bulk */
+ LOBYTE(CDC_DATA_FS_MAX_PACKET_SIZE), /* wMaxPacketSize: */
+ HIBYTE(CDC_DATA_FS_MAX_PACKET_SIZE), 0x00, /* bInterval: ignore for Bulk transfer */
+
+ /*Endpoint IN Descriptor*/
+ 0x07, /* bLength: Endpoint Descriptor size */
+ USB_DESC_TYPE_ENDPOINT, /* bDescriptorType: Endpoint */
+ CDC_IN_EP, /* bEndpointAddress */
+ 0x02, /* bmAttributes: Bulk */
+ LOBYTE(CDC_DATA_FS_MAX_PACKET_SIZE), /* wMaxPacketSize: */
+ HIBYTE(CDC_DATA_FS_MAX_PACKET_SIZE), 0x00 /* bInterval: ignore for Bulk transfer */
+};
+
+/**
+ * @}
+ */
+
+/** @defgroup USBD_CDC_Private_Functions
+ * @{
+ */
+
+static USBD_CDC_HandleTypeDef usbd_cdc;
+
+/**
+ * @brief USBD_CDC_Init
+ * Initialize the CDC interface
+ * @param pdev: device instance
+ * @param cfgidx: Configuration index
+ * @retval status
+ */
+static uint8_t USBD_CDC_Init(USBD_HandleTypeDef *pdev, uint8_t cfgidx)
+{
+ uint8_t ret = 0;
+ USBD_CDC_HandleTypeDef *hcdc;
+
+ if (pdev->dev_speed == USBD_SPEED_HIGH)
+ {
+ /* Open EP IN */
+ USBD_LL_OpenEP(pdev,
+ CDC_IN_EP,
+ USBD_EP_TYPE_BULK,
+ CDC_DATA_HS_IN_PACKET_SIZE);
+
+ /* Open EP OUT */
+ USBD_LL_OpenEP(pdev,
+ CDC_OUT_EP,
+ USBD_EP_TYPE_BULK,
+ CDC_DATA_HS_OUT_PACKET_SIZE);
+
+ }
+ else
+ {
+ /* Open EP IN */
+ USBD_LL_OpenEP(pdev,
+ CDC_IN_EP,
+ USBD_EP_TYPE_BULK,
+ CDC_DATA_FS_IN_PACKET_SIZE);
+
+ /* Open EP OUT */
+ USBD_LL_OpenEP(pdev,
+ CDC_OUT_EP,
+ USBD_EP_TYPE_BULK,
+ CDC_DATA_FS_OUT_PACKET_SIZE);
+ }
+ /* Open Command IN EP */
+ USBD_LL_OpenEP(pdev,
+ CDC_CMD_EP,
+ USBD_EP_TYPE_INTR,
+ CDC_CMD_PACKET_SIZE);
+
+// pdev->pClassData = USBD_malloc(sizeof (USBD_CDC_HandleTypeDef));
+ pdev->pClassData = &usbd_cdc;
+
+ if (pdev->pClassData == NULL)
+ {
+ ret = 1;
+ }
+ else
+ {
+ hcdc = (USBD_CDC_HandleTypeDef*) pdev->pClassData;
+
+ /* Init physical Interface components */
+ ((USBD_CDC_ItfTypeDef *) pdev->pUserData)->Init();
+
+ /* Init Xfer states */
+ hcdc->TxState = 0;
+ hcdc->RxState = 0;
+
+ if (pdev->dev_speed == USBD_SPEED_HIGH)
+ {
+ /* Prepare Out endpoint to receive next packet */
+ USBD_LL_PrepareReceive(pdev,
+ CDC_OUT_EP, hcdc->RxBuffer,
+ CDC_DATA_HS_OUT_PACKET_SIZE);
+ }
+ else
+ {
+ /* Prepare Out endpoint to receive next packet */
+ USBD_LL_PrepareReceive(pdev,
+ CDC_OUT_EP, hcdc->RxBuffer,
+ CDC_DATA_FS_OUT_PACKET_SIZE);
+ }
+
+ }
+ return ret;
+}
+
+/**
+ * @brief USBD_CDC_Init
+ * DeInitialize the CDC layer
+ * @param pdev: device instance
+ * @param cfgidx: Configuration index
+ * @retval status
+ */
+static uint8_t USBD_CDC_DeInit(USBD_HandleTypeDef *pdev, uint8_t cfgidx)
+{
+ uint8_t ret = 0;
+
+ /* Open EP IN */
+ USBD_LL_CloseEP(pdev,
+ CDC_IN_EP);
+
+ /* Open EP OUT */
+ USBD_LL_CloseEP(pdev,
+ CDC_OUT_EP);
+
+ /* Open Command IN EP */
+ USBD_LL_CloseEP(pdev,
+ CDC_CMD_EP);
+
+ /* DeInit physical Interface components */
+ if (pdev->pClassData != NULL)
+ {
+ ((USBD_CDC_ItfTypeDef *) pdev->pUserData)->DeInit();
+ //USBD_free(pdev->pClassData);
+ pdev->pClassData = NULL;
+ }
+
+ return ret;
+}
+
+/**
+ * @brief USBD_CDC_Setup
+ * Handle the CDC specific requests
+ * @param pdev: instance
+ * @param req: usb requests
+ * @retval status
+ */
+static uint8_t USBD_CDC_Setup(USBD_HandleTypeDef *pdev,
+ USBD_SetupReqTypedef *req)
+{
+ USBD_CDC_HandleTypeDef *hcdc = (USBD_CDC_HandleTypeDef*) pdev->pClassData;
+ static uint8_t ifalt = 0;
+
+ switch (req->bmRequest & USB_REQ_TYPE_MASK)
+ {
+ case USB_REQ_TYPE_CLASS:
+ if (req->wLength)
+ {
+ if (req->bmRequest & 0x80)
+ {
+ ((USBD_CDC_ItfTypeDef *) pdev->pUserData)->Control(
+ req->bRequest, (uint8_t *) hcdc->data, req->wLength);
+ USBD_CtlSendData(pdev, (uint8_t *) hcdc->data, req->wLength);
+ }
+ else
+ {
+ hcdc->CmdOpCode = req->bRequest;
+ hcdc->CmdLength = req->wLength;
+
+ USBD_CtlPrepareRx(pdev, (uint8_t *) hcdc->data, req->wLength);
+ }
+
+ }
+ else
+ {
+ ((USBD_CDC_ItfTypeDef *) pdev->pUserData)->Control(req->bRequest,
+ (uint8_t*) req, 0);
+ }
+ break;
+
+ case USB_REQ_TYPE_STANDARD:
+ switch (req->bRequest)
+ {
+ case USB_REQ_GET_INTERFACE:
+ USBD_CtlSendData(pdev, &ifalt, 1);
+ break;
+
+ case USB_REQ_SET_INTERFACE:
+ break;
+ }
+ break;
+
+ default:
+ break;
+ }
+ return USBD_OK;
+}
+
+/**
+ * @brief USBD_CDC_DataIn
+ * Data sent on non-control IN endpoint
+ * @param pdev: device instance
+ * @param epnum: endpoint number
+ * @retval status
+ */
+static uint8_t USBD_CDC_DataIn(USBD_HandleTypeDef *pdev, uint8_t epnum)
+{
+ USBD_CDC_HandleTypeDef *hcdc = (USBD_CDC_HandleTypeDef*) pdev->pClassData;
+
+ if (pdev->pClassData != NULL)
+ {
+
+ hcdc->TxState = 0;
+
+ ((USBD_CDC_ItfTypeDef *) pdev->pUserData)->Transmitted(hcdc->TxBuffer,
+ hcdc->TxLength);
+
+ return USBD_OK;
+ }
+ else
+ {
+ return USBD_FAIL;
+ }
+}
+
+/**
+ * @brief USBD_CDC_DataOut
+ * Data received on non-control Out endpoint
+ * @param pdev: device instance
+ * @param epnum: endpoint number
+ * @retval status
+ */
+static uint8_t USBD_CDC_DataOut(USBD_HandleTypeDef *pdev, uint8_t epnum)
+{
+ USBD_CDC_HandleTypeDef *hcdc = (USBD_CDC_HandleTypeDef*) pdev->pClassData;
+
+ /* Get the received data length */
+ hcdc->RxLength = USBD_LL_GetRxDataSize(pdev, epnum);
+ hcdc->RxState = 0;
+
+ /* USB data will be immediately processed, this allow next USB traffic being
+ NAKed till the end of the application Xfer */
+ if (pdev->pClassData != NULL)
+ {
+ ((USBD_CDC_ItfTypeDef *) pdev->pUserData)->Received(hcdc->RxBuffer,
+ &hcdc->RxLength);
+
+ return USBD_OK;
+ }
+ else
+ {
+ return USBD_FAIL;
+ }
+}
+
+/**
+ * @brief USBD_CDC_DataOut
+ * Data received on non-control Out endpoint
+ * @param pdev: device instance
+ * @param epnum: endpoint number
+ * @retval status
+ */
+static uint8_t USBD_CDC_EP0_RxReady(USBD_HandleTypeDef *pdev)
+{
+ USBD_CDC_HandleTypeDef *hcdc = (USBD_CDC_HandleTypeDef*) pdev->pClassData;
+
+ if ((pdev->pUserData != NULL) && (hcdc->CmdOpCode != 0xFF))
+ {
+ ((USBD_CDC_ItfTypeDef *) pdev->pUserData)->Control(hcdc->CmdOpCode,
+ (uint8_t *) hcdc->data, hcdc->CmdLength);
+ hcdc->CmdOpCode = 0xFF;
+
+ }
+ return USBD_OK;
+}
+
+/**
+ * @brief USBD_CDC_GetFSCfgDesc
+ * Return configuration descriptor
+ * @param speed : current device speed
+ * @param length : pointer data length
+ * @retval pointer to descriptor buffer
+ */
+static uint8_t *USBD_CDC_GetFSCfgDesc(uint16_t *length)
+{
+ *length = USB_CDC_CONFIG_DESC_SIZ;
+ return USBD_CDC_CfgDesc;
+}
+
+/**
+ * @brief USBD_CDC_GetHSCfgDesc
+ * Return configuration descriptor
+ * @param speed : current device speed
+ * @param length : pointer data length
+ * @retval pointer to descriptor buffer
+ */
+static uint8_t *USBD_CDC_GetHSCfgDesc(uint16_t *length)
+{
+ *length = USB_CDC_CONFIG_DESC_SIZ;
+ return USBD_CDC_CfgDesc;
+}
+
+/**
+ * @brief USBD_CDC_GetCfgDesc
+ * Return configuration descriptor
+ * @param speed : current device speed
+ * @param length : pointer data length
+ * @retval pointer to descriptor buffer
+ */
+static uint8_t *USBD_CDC_GetOtherSpeedCfgDesc(uint16_t *length)
+{
+ *length = USB_CDC_CONFIG_DESC_SIZ;
+ return USBD_CDC_CfgDesc;
+}
+
+/**
+ * @brief DeviceQualifierDescriptor
+ * return Device Qualifier descriptor
+ * @param length : pointer data length
+ * @retval pointer to descriptor buffer
+ */
+uint8_t *USBD_CDC_GetDeviceQualifierDescriptor(uint16_t *length)
+{
+ *length = sizeof(USBD_CDC_DeviceQualifierDesc);
+ return USBD_CDC_DeviceQualifierDesc;
+}
+
+/**
+ * @brief USBD_CDC_RegisterInterface
+ * @param pdev: device instance
+ * @param fops: CD Interface callback
+ * @retval status
+ */
+uint8_t USBD_CDC_RegisterInterface(USBD_HandleTypeDef *pdev,
+ USBD_CDC_ItfTypeDef *fops)
+{
+ uint8_t ret = USBD_FAIL;
+
+ if (fops != NULL)
+ {
+ pdev->pUserData = fops;
+ ret = USBD_OK;
+ }
+
+ return ret;
+}
+
+/**
+ * @brief USBD_CDC_SetTxBuffer
+ * @param pdev: device instance
+ * @param pbuff: Tx Buffer
+ * @retval status
+ */
+uint8_t USBD_CDC_SetTxBuffer(USBD_HandleTypeDef *pdev, uint8_t *pbuff,
+ uint16_t length)
+{
+ USBD_CDC_HandleTypeDef *hcdc = (USBD_CDC_HandleTypeDef*) pdev->pClassData;
+
+ hcdc->TxBuffer = pbuff;
+ hcdc->TxLength = length;
+
+ return USBD_OK;
+}
+
+/**
+ * @brief USBD_CDC_SetRxBuffer
+ * @param pdev: device instance
+ * @param pbuff: Rx Buffer
+ * @retval status
+ */
+uint8_t USBD_CDC_SetRxBuffer(USBD_HandleTypeDef *pdev, uint8_t *pbuff)
+{
+ USBD_CDC_HandleTypeDef *hcdc = (USBD_CDC_HandleTypeDef*) pdev->pClassData;
+
+ hcdc->RxBuffer = pbuff;
+
+ return USBD_OK;
+}
+
+/**
+ * @brief USBD_CDC_DataOut
+ * Data received on non-control Out endpoint
+ * @param pdev: device instance
+ * @param epnum: endpoint number
+ * @retval status
+ */
+uint8_t USBD_CDC_TransmitPacket(USBD_HandleTypeDef *pdev)
+{
+ USBD_CDC_HandleTypeDef *hcdc = (USBD_CDC_HandleTypeDef*) pdev->pClassData;
+
+ if (pdev->pClassData != NULL)
+ {
+ if (hcdc->TxState == 0)
+ {
+ /* Tx Transfer in progress */
+ hcdc->TxState = 1;
+
+ /* Transmit next packet */
+ USBD_LL_Transmit(pdev,
+ CDC_IN_EP, hcdc->TxBuffer, hcdc->TxLength);
+
+ return USBD_OK;
+ }
+ else
+ {
+ return USBD_BUSY;
+ }
+ }
+ else
+ {
+ return USBD_FAIL;
+ }
+}
+
+/**
+ * @brief USBD_CDC_ReceivePacket
+ * prepare OUT Endpoint for reception
+ * @param pdev: device instance
+ * @retval status
+ */
+uint8_t USBD_CDC_ReceivePacket(USBD_HandleTypeDef *pdev)
+{
+ USBD_CDC_HandleTypeDef *hcdc = (USBD_CDC_HandleTypeDef*) pdev->pClassData;
+
+ /* Suspend or Resume USB Out process */
+ if (pdev->pClassData != NULL)
+ {
+ hcdc->RxState = 1;
+ if (pdev->dev_speed == USBD_SPEED_HIGH)
+ {
+ /* Prepare Out endpoint to receive next packet */
+ USBD_LL_PrepareReceive(pdev,
+ CDC_OUT_EP, hcdc->RxBuffer,
+ CDC_DATA_HS_OUT_PACKET_SIZE);
+ }
+ else
+ {
+ /* Prepare Out endpoint to receive next packet */
+ USBD_LL_PrepareReceive(pdev,
+ CDC_OUT_EP, hcdc->RxBuffer,
+ CDC_DATA_FS_OUT_PACKET_SIZE);
+ }
+ return USBD_OK;
+ }
+ else
+ {
+ return USBD_FAIL;
+ }
+}
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
+