/**
******************************************************************************
* @file usbd_cdc.c
* @author MCD Application Team
* @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
*
******************************************************************************
* @attention
*
* Copyright (c) 2015 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
* @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
*
******************************************************************************
*/
/* BSPDependencies
- "stm32xxxxx_{eval}{discovery}{nucleo_144}.c"
- "stm32xxxxx_{eval}{discovery}_io.c"
EndBSPDependencies */
/* 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);
#ifndef USE_USBD_COMPOSITE
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);
#endif /* USE_USBD_COMPOSITE */
#ifndef USE_USBD_COMPOSITE
/* 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,
};
#endif /* USE_USBD_COMPOSITE */
/**
* @}
*/
/** @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,
#ifdef USE_USBD_COMPOSITE
NULL,
NULL,
NULL,
NULL,
#else
USBD_CDC_GetHSCfgDesc,
USBD_CDC_GetFSCfgDesc,
USBD_CDC_GetOtherSpeedCfgDesc,
USBD_CDC_GetDeviceQualifierDescriptor,
#endif /* USE_USBD_COMPOSITE */
};
#ifndef USE_USBD_COMPOSITE
/* USB CDC device Configuration Descriptor */
__ALIGN_BEGIN static 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 */
0x00,
0x02, /* bNumInterfaces: 2 interfaces */
0x01, /* bConfigurationValue: Configuration value */
0x00, /* iConfiguration: Index of string descriptor
describing the configuration */
#if (USBD_SELF_POWERED == 1U)
0xC0, /* bmAttributes: Bus Powered according to user configuration */
#else
0x80, /* bmAttributes: Bus Powered according to user configuration */
#endif /* USBD_SELF_POWERED */
USBD_MAX_POWER, /* MaxPower (mA) */
/*---------------------------------------------------------------------------*/
/* 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 endpoint 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 */
0x00, /* bmCapabilities: D0+D1 */
0x01, /* bDataInterface */
/* 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),
CDC_FS_BINTERVAL, /* 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 */
/* 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 */
};
#endif /* USE_USBD_COMPOSITE */
static uint8_t CDCInEpAdd = CDC_IN_EP;
static uint8_t CDCOutEpAdd = CDC_OUT_EP;
static uint8_t CDCCmdEpAdd = CDC_CMD_EP;
/**
* @}
*/
/** @defgroup USBD_CDC_Private_Functions
* @{
*/
/**
* @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)
{
UNUSED(cfgidx);
USBD_CDC_HandleTypeDef *hcdc;
hcdc = (USBD_CDC_HandleTypeDef *)USBD_malloc(sizeof(USBD_CDC_HandleTypeDef));
if (hcdc == NULL)
{
pdev->pClassDataCmsit[pdev->classId] = NULL;
return (uint8_t)USBD_EMEM;
}
(void)USBD_memset(hcdc, 0, sizeof(USBD_CDC_HandleTypeDef));
pdev->pClassDataCmsit[pdev->classId] = (void *)hcdc;
pdev->pClassData = pdev->pClassDataCmsit[pdev->classId];
#ifdef USE_USBD_COMPOSITE
/* Get the Endpoints addresses allocated for this class instance */
CDCInEpAdd = USBD_CoreGetEPAdd(pdev, USBD_EP_IN, USBD_EP_TYPE_BULK);
CDCOutEpAdd = USBD_CoreGetEPAdd(pdev, USBD_EP_OUT, USBD_EP_TYPE_BULK);
CDCCmdEpAdd = USBD_CoreGetEPAdd(pdev, USBD_EP_IN, USBD_EP_TYPE_INTR);
#endif /* USE_USBD_COMPOSITE */
if (pdev->dev_speed == USBD_SPEED_HIGH)
{
/* Open EP IN */
(void)USBD_LL_OpenEP(pdev, CDCInEpAdd, USBD_EP_TYPE_BULK,
CDC_DATA_HS_IN_PACKET_SIZE);
pdev->ep_in[CDCInEpAdd & 0xFU].is_used = 1U;
/* Open EP OUT */
(void)USBD_LL_OpenEP(pdev, CDCOutEpAdd, USBD_EP_TYPE_BULK,
CDC_DATA_HS_OUT_PACKET_SIZE);
pdev->ep_out[CDCOutEpAdd & 0xFU].is_used = 1U;
/* Set bInterval for CDC CMD Endpoint */
pdev->ep_in[CDCCmdEpAdd & 0xFU].bInterval = CDC_HS_BINTERVAL;
}
else
{
/* Open EP IN */
(void)USBD_LL_OpenEP(pdev, CDCInEpAdd, USBD_EP_TYPE_BULK,
CDC_DATA_FS_IN_PACKET_SIZE);
pdev->ep_in[CDCInEpAdd & 0xFU].is_used = 1U;
/* Open EP OUT */
(void)USBD_LL_OpenEP(pdev, CDCOutEpAdd, USBD_EP_TYPE_BULK,
CDC_DATA_FS_OUT_PACKET_SIZE);
pdev->ep_out[CDCOutEpAdd & 0xFU].is_used = 1U;
/* Set bInterval for CMD Endpoint */
pdev->ep_in[CDCCmdEpAdd & 0xFU].bInterval = CDC_FS_BINTERVAL;
}
/* Open Command IN EP */
(void)USBD_LL_OpenEP(pdev, CDCCmdEpAdd, USBD_EP_TYPE_INTR, CDC_CMD_PACKET_SIZE);
pdev->ep_in[CDCCmdEpAdd & 0xFU].is_used = 1U;
hcdc->RxBuffer = NULL;
/* Init physical Interface components */
((USBD_CDC_ItfTypeDef *)pdev->pUserData[pdev->classId])->Init();
/* Init Xfer states */
hcdc->TxState = 0U;
hcdc->RxState = 0U;
if (hcdc->RxBuffer == NULL)
{
return (uint8_t)USBD_EMEM;
}
if (pdev->dev_speed == USBD_SPEED_HIGH)
{
/* Prepare Out endpoint to receive next packet */
(void)USBD_LL_PrepareReceive(pdev, CDCOutEpAdd, hcdc->RxBuffer,
CDC_DATA_HS_OUT_PACKET_SIZE);
}
else
{
/* Prepare Out endpoint to receive next packet */
(void)USBD_LL_PrepareReceive(pdev, CDCOutEpAdd, hcdc->RxBuffer,
CDC_DATA_FS_OUT_PACKET_SIZE);
}
return (uint8_t)USBD_OK;
}
/**
* @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)
{
UNUSED(cfgidx);
#ifdef USE_USBD_COMPOSITE
/* Get the Endpoints addresses allocated for this CDC class instance */
CDCInEpAdd = USBD_CoreGetEPAdd(pdev, USBD_EP_IN, USBD_EP_TYPE_BULK);
CDCOutEpAdd = USBD_CoreGetEPAdd(pdev, USBD_EP_OUT, USBD_EP_TYPE_BULK);
CDCCmdEpAdd = USBD_CoreGetEPAdd(pdev, USBD_EP_IN, USBD_EP_TYPE_INTR);
#endif /* USE_USBD_COMPOSITE */
/* Close EP IN */
(void)USBD_LL_CloseEP(pdev, CDCInEpAdd);
pdev->ep_in[CDCInEpAdd & 0xFU].is_used = 0U;
/* Close EP OUT */
(void)USBD_LL_CloseEP(pdev, CDCOutEpAdd);
pdev->ep_out[CDCOutEpAdd & 0xFU].is_used = 0U;
/* Close Command IN EP */
(void)USBD_LL_CloseEP(pdev, CDCCmdEpAdd);
pdev->ep_in[CDCCmdEpAdd & 0xFU].is_used = 0U;
pdev->ep_in[CDCCmdEpAdd & 0xFU].bInterval = 0U;
/* DeInit physical Interface components */
if (pdev->pClassDataCmsit[pdev->classId] != NULL)
{
((USBD_CDC_ItfTypeDef *)pdev->pUserData[pdev->classId])->DeInit();
(void)USBD_free(pdev->pClassDataCmsit[pdev->classId]);
pdev->pClassDataCmsit[pdev->classId] = NULL;
pdev->pClassData = NULL;
}
return (uint8_t)USBD_OK;
}
/**
* @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->pClassDataCmsit[pdev->classId];
uint16_t len;
uint8_t ifalt = 0U;
uint16_t status_info = 0U;
USBD_StatusTypeDef ret = USBD_OK;
if (hcdc == NULL)
{
return (uint8_t)USBD_FAIL;
}
switch (req->bmRequest & USB_REQ_TYPE_MASK)
{
case USB_REQ_TYPE_CLASS:
if (req->wLength != 0U)
{
if ((req->bmRequest & 0x80U) != 0U)
{
((USBD_CDC_ItfTypeDef *)pdev->pUserData[pdev->classId])->Control(req->bRequest,
(uint8_t *)hcdc->data,
req->wLength);
len = MIN(CDC_REQ_MAX_DATA_SIZE, req->wLength);
(void)USBD_CtlSendData(pdev, (uint8_t *)hcdc->data, len);
}
else
{
hcdc->CmdOpCode = req->bRequest;
hcdc->CmdLength = (uint8_t)MIN(req->wLength, USB_MAX_EP0_SIZE);
(void)USBD_CtlPrepareRx(pdev, (uint8_t *)hcdc->data, hcdc->CmdLength);
}
}
else
{
((USBD_CDC_ItfTypeDef *)pdev->pUserData[pdev->classId])->Control(req->bRequest,
(uint8_t *)req, 0U);
}
break;
case USB_REQ_TYPE_STANDARD:
switch (req->bRequest)
{
case USB_REQ_GET_STATUS:
if (pdev->dev_state == USBD_STATE_CONFIGURED)
{
(void)USBD_CtlSendData(pdev, (uint8_t *)&status_info, 2U);
}
else
{
USBD_CtlError(pdev, req);
ret = USBD_FAIL;
}
break;
case USB_REQ_GET_INTERFACE:
if (pdev->dev_state == USBD_STATE_CONFIGURED)
{
(void)USBD_CtlSendData(pdev, &ifalt, 1U);
}
else
{
USBD_CtlError(pdev, req);
ret = USBD_FAIL;
}
break;
case USB_REQ_SET_INTERFACE:
if (pdev->dev_state != USBD_STATE_CONFIGURED)
{
USBD_CtlError(pdev, req);
ret = USBD_FAIL;
}
break;
case USB_REQ_CLEAR_FEATURE:
break;
default:
USBD_CtlError(pdev, req);
ret = USBD_FAIL;
break;
}
break;
default:
USBD_CtlError(pdev, req);
ret = USBD_FAIL;
break;
}
return (uint8_t)ret;
}
/**
* @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;
PCD_HandleTypeDef *hpcd = (PCD_HandleTypeDef *)pdev->pData;
if (pdev->pClassDataCmsit[pdev->classId] == NULL)
{
return (uint8_t)USBD_FAIL;
}
hcdc = (USBD_CDC_HandleTypeDef *)pdev->pClassDataCmsit[pdev->classId];
if ((pdev->ep_in[epnum & 0xFU].total_length > 0U) &&
((pdev->ep_in[epnum & 0xFU].total_length % hpcd->IN_ep[epnum & 0xFU].maxpacket) == 0U))
{
/* Update the packet total length */
pdev->ep_in[epnum & 0xFU].total_length = 0U;
/* Send ZLP */
(void)USBD_LL_Transmit(pdev, epnum, NULL, 0U);
}
else
{
hcdc->TxState = 0U;
if (((USBD_CDC_ItfTypeDef *)pdev->pUserData[pdev->classId])->TransmitCplt != NULL)
{
((USBD_CDC_ItfTypeDef *)pdev->pUserData[pdev->classId])->TransmitCplt(hcdc->TxBuffer, &hcdc->TxLength, epnum);
}
}
return (uint8_t)USBD_OK;
}
/**
* @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->pClassDataCmsit[pdev->classId];
if (pdev->pClassDataCmsit[pdev->classId] == NULL)
{
return (uint8_t)USBD_FAIL;
}
/* Get the received data length */
hcdc->RxLength = USBD_LL_GetRxDataSize(pdev, epnum);
/* USB data will be immediately processed, this allow next USB traffic being
NAKed till the end of the application Xfer */
((USBD_CDC_ItfTypeDef *)pdev->pUserData[pdev->classId])->Receive(hcdc->RxBuffer, &hcdc->RxLength);
return (uint8_t)USBD_OK;
}
/**
* @brief USBD_CDC_EP0_RxReady
* Handle EP0 Rx Ready event
* @param pdev: device instance
* @retval status
*/
static uint8_t USBD_CDC_EP0_RxReady(USBD_HandleTypeDef *pdev)
{
USBD_CDC_HandleTypeDef *hcdc = (USBD_CDC_HandleTypeDef *)pdev->pClassDataCmsit[pdev->classId];
if (hcdc == NULL)
{
return (uint8_t)USBD_FAIL;
}
if ((pdev->pUserData[pdev->classId] != NULL) && (hcdc->CmdOpCode != 0xFFU))
{
((USBD_CDC_ItfTypeDef *)pdev->pUserData[pdev->classId])->Control(hcdc->CmdOpCode,
(uint8_t *)hcdc->data,
(uint16_t)hcdc->CmdLength);
hcdc->CmdOpCode = 0xFFU;
}
return (uint8_t)USBD_OK;
}
#ifndef USE_USBD_COMPOSITE
/**
* @brief USBD_CDC_GetFSCfgDesc
* Return configuration descriptor
* @param length : pointer data length
* @retval pointer to descriptor buffer
*/
static uint8_t *USBD_CDC_GetFSCfgDesc(uint16_t *length)
{
USBD_EpDescTypeDef *pEpCmdDesc = USBD_GetEpDesc(USBD_CDC_CfgDesc, CDC_CMD_EP);
USBD_EpDescTypeDef *pEpOutDesc = USBD_GetEpDesc(USBD_CDC_CfgDesc, CDC_OUT_EP);
USBD_EpDescTypeDef *pEpInDesc = USBD_GetEpDesc(USBD_CDC_CfgDesc, CDC_IN_EP);
if (pEpCmdDesc != NULL)
{
pEpCmdDesc->bInterval = CDC_FS_BINTERVAL;
}
if (pEpOutDesc != NULL)
{
pEpOutDesc->wMaxPacketSize = CDC_DATA_FS_MAX_PACKET_SIZE;
}
if (pEpInDesc != NULL)
{
pEpInDesc->wMaxPacketSize = CDC_DATA_FS_MAX_PACKET_SIZE;
}
*length = (uint16_t)sizeof(USBD_CDC_CfgDesc);
return USBD_CDC_CfgDesc;
}
/**
* @brief USBD_CDC_GetHSCfgDesc
* Return configuration descriptor
* @param length : pointer data length
* @retval pointer to descriptor buffer
*/
static uint8_t *USBD_CDC_GetHSCfgDesc(uint16_t *length)
{
USBD_EpDescTypeDef *pEpCmdDesc = USBD_GetEpDesc(USBD_CDC_CfgDesc, CDC_CMD_EP);
USBD_EpDescTypeDef *pEpOutDesc = USBD_GetEpDesc(USBD_CDC_CfgDesc, CDC_OUT_EP);
USBD_EpDescTypeDef *pEpInDesc = USBD_GetEpDesc(USBD_CDC_CfgDesc, CDC_IN_EP);
if (pEpCmdDesc != NULL)
{
pEpCmdDesc->bInterval = CDC_HS_BINTERVAL;
}
if (pEpOutDesc != NULL)
{
pEpOutDesc->wMaxPacketSize = CDC_DATA_HS_MAX_PACKET_SIZE;
}
if (pEpInDesc != NULL)
{
pEpInDesc->wMaxPacketSize = CDC_DATA_HS_MAX_PACKET_SIZE;
}
*length = (uint16_t)sizeof(USBD_CDC_CfgDesc);
return USBD_CDC_CfgDesc;
}
/**
* @brief USBD_CDC_GetOtherSpeedCfgDesc
* Return configuration descriptor
* @param length : pointer data length
* @retval pointer to descriptor buffer
*/
static uint8_t *USBD_CDC_GetOtherSpeedCfgDesc(uint16_t *length)
{
USBD_EpDescTypeDef *pEpCmdDesc = USBD_GetEpDesc(USBD_CDC_CfgDesc, CDC_CMD_EP);
USBD_EpDescTypeDef *pEpOutDesc = USBD_GetEpDesc(USBD_CDC_CfgDesc, CDC_OUT_EP);
USBD_EpDescTypeDef *pEpInDesc = USBD_GetEpDesc(USBD_CDC_CfgDesc, CDC_IN_EP);
if (pEpCmdDesc != NULL)
{
pEpCmdDesc->bInterval = CDC_FS_BINTERVAL;
}
if (pEpOutDesc != NULL)
{
pEpOutDesc->wMaxPacketSize = CDC_DATA_FS_MAX_PACKET_SIZE;
}
if (pEpInDesc != NULL)
{
pEpInDesc->wMaxPacketSize = CDC_DATA_FS_MAX_PACKET_SIZE;
}
*length = (uint16_t)sizeof(USBD_CDC_CfgDesc);
return USBD_CDC_CfgDesc;
}
/**
* @brief USBD_CDC_GetDeviceQualifierDescriptor
* return Device Qualifier descriptor
* @param length : pointer data length
* @retval pointer to descriptor buffer
*/
uint8_t *USBD_CDC_GetDeviceQualifierDescriptor(uint16_t *length)
{
*length = (uint16_t)sizeof(USBD_CDC_DeviceQualifierDesc);
return USBD_CDC_DeviceQualifierDesc;
}
#endif /* USE_USBD_COMPOSITE */
/**
* @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)
{
if (fops == NULL)
{
return (uint8_t)USBD_FAIL;
}
pdev->pUserData[pdev->classId] = fops;
return (uint8_t)USBD_OK;
}
/**
* @brief USBD_CDC_SetTxBuffer
* @param pdev: device instance
* @param pbuff: Tx Buffer
* @param length: Tx Buffer length
* @retval status
*/
uint8_t USBD_CDC_SetTxBuffer(USBD_HandleTypeDef *pdev,
uint8_t *pbuff, uint32_t length)
{
USBD_CDC_HandleTypeDef *hcdc = (USBD_CDC_HandleTypeDef *)pdev->pClassDataCmsit[pdev->classId];
if (hcdc == NULL)
{
return (uint8_t)USBD_FAIL;
}
hcdc->TxBuffer = pbuff;
hcdc->TxLength = length;
return (uint8_t)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->pClassDataCmsit[pdev->classId];
if (hcdc == NULL)
{
return (uint8_t)USBD_FAIL;
}
hcdc->RxBuffer = pbuff;
return (uint8_t)USBD_OK;
}
/**
* @brief USBD_CDC_TransmitPacket
* Transmit packet on IN endpoint
* @param pdev: device instance
* @retval status
*/
uint8_t USBD_CDC_TransmitPacket(USBD_HandleTypeDef *pdev)
{
USBD_CDC_HandleTypeDef *hcdc = (USBD_CDC_HandleTypeDef *)pdev->pClassDataCmsit[pdev->classId];
USBD_StatusTypeDef ret = USBD_BUSY;
#ifdef USE_USBD_COMPOSITE
/* Get the Endpoints addresses allocated for this class instance */
CDCInEpAdd = USBD_CoreGetEPAdd(pdev, USBD_EP_IN, USBD_EP_TYPE_BULK);
#endif /* USE_USBD_COMPOSITE */
if (pdev->pClassDataCmsit[pdev->classId] == NULL)
{
return (uint8_t)USBD_FAIL;
}
if (hcdc->TxState == 0U)
{
/* Tx Transfer in progress */
hcdc->TxState = 1U;
/* Update the packet total length */
pdev->ep_in[CDCInEpAdd & 0xFU].total_length = hcdc->TxLength;
/* Transmit next packet */
(void)USBD_LL_Transmit(pdev, CDCInEpAdd, hcdc->TxBuffer, hcdc->TxLength);
ret = USBD_OK;
}
return (uint8_t)ret;
}
/**
* @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->pClassDataCmsit[pdev->classId];
#ifdef USE_USBD_COMPOSITE
/* Get the Endpoints addresses allocated for this class instance */
CDCOutEpAdd = USBD_CoreGetEPAdd(pdev, USBD_EP_OUT, USBD_EP_TYPE_BULK);
#endif /* USE_USBD_COMPOSITE */
if (pdev->pClassDataCmsit[pdev->classId] == NULL)
{
return (uint8_t)USBD_FAIL;
}
if (pdev->dev_speed == USBD_SPEED_HIGH)
{
/* Prepare Out endpoint to receive next packet */
(void)USBD_LL_PrepareReceive(pdev, CDCOutEpAdd, hcdc->RxBuffer,
CDC_DATA_HS_OUT_PACKET_SIZE);
}
else
{
/* Prepare Out endpoint to receive next packet */
(void)USBD_LL_PrepareReceive(pdev, CDCOutEpAdd, hcdc->RxBuffer,
CDC_DATA_FS_OUT_PACKET_SIZE);
}
return (uint8_t)USBD_OK;
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/