USB Composite 组合设备之多路CDC实现
USB Composite 组合设备之多路CDC实现
- USB复合设备与组合设备区别
- 效果展示
- 修改相关配置
-
- 修改配置项
- 修改设备描述符
- 修改配置、接口、端点描述符
- 接口修改
- FIFO配置
- 知识点
-
- FIFO分配
- 注意事项
USB复合设备与组合设备区别
其实多个接口组合在一起有2种情况
第一种叫做USB复合设备（Compound Device）：
就是此类设备内部会集成一个HUD，然后多个USB连接到此HUD上，然后每个USB都会有自己独立的PID、VID
第二种叫做USB组合设备（Composite Device）：
此类设备则内部只有一个PID、VID，通过定义多个接口描述符来实现多个功能的组合
参考原文链接
效果展示
修改相关配置
修改配置项
usbd_conf.h
#define USBD_MAX_NUM_INTERFACES 6U
修改设备描述符
usbd_desc.c
__ALIGN_BEGIN uint8_t USBD_FS_DeviceDesc[USB_LEN_DEV_DESC] __ALIGN_END =
{
0x12, /*bLength */
USB_DESC_TYPE_DEVICE, /*bDescriptorType*/
0x00, /*bcdUSB */
0x02,
0xEF, /*bDeviceClass*/
0x02, /*bDeviceSubClass*/
0x01, /*bDeviceProtocol*/
// 0x02, /*bDeviceClass*/
// 0x02, /*bDeviceSubClass*/
// 0x00, /*bDeviceProtocol*/
USB_MAX_EP0_SIZE, /*bMaxPacketSize*/
LOBYTE(USBD_VID), /*idVendor*/
HIBYTE(USBD_VID), /*idVendor*/
LOBYTE(USBD_PID_FS), /*idProduct*/
HIBYTE(USBD_PID_FS), /*idProduct*/
0x00, /*bcdDevice rel. 2.00*/
0x02,
USBD_IDX_MFC_STR, /*Index of manufacturer string*/
USBD_IDX_PRODUCT_STR, /*Index of product string*/
USBD_IDX_SERIAL_STR, /*Index of serial number string*/
USBD_MAX_NUM_CONFIGURATION /*bNumConfigurations*/
};
修改配置、接口、端点描述符
usbd_cdc.h
头文件增加了：多路串口的宏定义
修改了：发送接收接口函数声明
/**
******************************************************************************
* @file usbd_cdc.h
* @author MCD Application Team
* @brief header file for the usbd_cdc.c file.
******************************************************************************
* @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.
*
******************************************************************************
*/
/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __USB_CDC_H
#define __USB_CDC_H
#ifdef __cplusplus
extern "C" {
#endif
/* Includes ------------------------------------------------------------------*/
#include "usbd_ioreq.h"
/** @addtogroup STM32_USB_DEVICE_LIBRARY
* @{
*/
/** @defgroup usbd_cdc
* @brief This file is the Header file for usbd_cdc.c
* @{
*/
/** @defgroup usbd_cdc_Exported_Defines
* @{
*/
#ifndef CDC_IN_EP
#define CDC_IN_EP 0x81U /* EP1 for data IN */
#endif /* CDC_IN_EP */
#ifndef CDC_OUT_EP
#define CDC_OUT_EP 0x01U /* EP1 for data OUT */
#endif /* CDC_OUT_EP */
#ifndef CDC_CMD_EP
#define CDC_CMD_EP 0x84U /* EP4 for CDC commands */
#endif /* CDC_CMD_EP */
/* 2 路 USB CDC */
#define USE_CDC_IAD 1 /**< 使用多路CDC使能 */
#define USE_CDC_NUM 3 /**< 使用2路 or 3路 */
#ifndef CDC_IN_EP2
#define CDC_IN_EP2 0x82U /* EP2 for data IN */
#endif /* CDC_IN_EP */
#ifndef CDC_OUT_EP2
#define CDC_OUT_EP2 0x02U /* EP2 for data OUT */
#endif /* CDC_OUT_EP */
#ifndef CDC_CMD_EP5
#define CDC_CMD_EP5 0x85U /* EP5 for CDC commands */
#endif /* CDC_CMD_EP */
#ifndef CDC_IN_EP3
#define CDC_IN_EP3 0x83U /* EP3 for data IN */
#endif /* CDC_IN_EP */
#ifndef CDC_OUT_EP3
#define CDC_OUT_EP3 0x03U /* EP3 for data OUT */
#endif /* CDC_OUT_EP */
#ifndef CDC_CMD_EP6
#define CDC_CMD_EP6 0x86U /* EP6 for CDC commands */
#endif /* CDC_CMD_EP */
#ifndef CDC_HS_BINTERVAL
#define CDC_HS_BINTERVAL 0x10U
#endif /* CDC_HS_BINTERVAL */
#ifndef CDC_FS_BINTERVAL
#define CDC_FS_BINTERVAL 0x10U
#endif /* CDC_FS_BINTERVAL */
/* CDC Endpoints parameters: you can fine tune these values depending on the needed baudrates and performance. */
#define CDC_DATA_HS_MAX_PACKET_SIZE 512U /* Endpoint IN & OUT Packet size */
#define CDC_DATA_FS_MAX_PACKET_SIZE 64U /* Endpoint IN & OUT Packet size */
#define CDC_CMD_PACKET_SIZE 8U /* Control Endpoint Packet size */
#if USE_CDC_IAD && USE_CDC_NUM == 2
#define USB_CDC_CONFIG_DESC_SIZ ((67U - 9U + 8U) * 2U + 9U)
#elif USE_CDC_IAD && USE_CDC_NUM == 3
#define USB_CDC_CONFIG_DESC_SIZ ((67U - 9U + 8U) * 3U + 9U)
#else
#define USB_CDC_CONFIG_DESC_SIZ 67U
#endif
#define CDC_DATA_HS_IN_PACKET_SIZE CDC_DATA_HS_MAX_PACKET_SIZE
#define CDC_DATA_HS_OUT_PACKET_SIZE CDC_DATA_HS_MAX_PACKET_SIZE
#define CDC_DATA_FS_IN_PACKET_SIZE CDC_DATA_FS_MAX_PACKET_SIZE
#define CDC_DATA_FS_OUT_PACKET_SIZE CDC_DATA_FS_MAX_PACKET_SIZE
#define CDC_REQ_MAX_DATA_SIZE 0x7U
/*---------------------------------------------------------------------*/
/* CDC definitions */
/*---------------------------------------------------------------------*/
#define CDC_SEND_ENCAPSULATED_COMMAND 0x00U
#define CDC_GET_ENCAPSULATED_RESPONSE 0x01U
#define CDC_SET_COMM_FEATURE 0x02U
#define CDC_GET_COMM_FEATURE 0x03U
#define CDC_CLEAR_COMM_FEATURE 0x04U
#define CDC_SET_LINE_CODING 0x20U
#define CDC_GET_LINE_CODING 0x21U
#define CDC_SET_CONTROL_LINE_STATE 0x22U
#define CDC_SEND_BREAK 0x23U
/**
* @}
*/
/** @defgroup USBD_CORE_Exported_TypesDefinitions
* @{
*/
/**
* @}
*/
typedef struct
{
uint32_t bitrate;
uint8_t format;
uint8_t paritytype;
uint8_t datatype;
} USBD_CDC_LineCodingTypeDef;
typedef struct _USBD_CDC_Itf
{
int8_t (* Init)(void);
int8_t (* DeInit)(void);
int8_t (* Control)(uint8_t cmd, uint8_t *pbuf, uint16_t length);
int8_t (* Receive)(uint8_t *Buf, uint32_t *Len, uint8_t epnum);
int8_t (* TransmitCplt)(uint8_t *Buf, uint32_t *Len, uint8_t epnum);
} USBD_CDC_ItfTypeDef;
typedef struct
{
uint32_t data[CDC_DATA_HS_MAX_PACKET_SIZE / 4U]; /* Force 32-bit alignment */
uint8_t CmdOpCode;
uint8_t CmdLength;
uint8_t *RxBuffer;
uint8_t *TxBuffer;
uint32_t RxLength;
uint32_t TxLength;
__IO uint32_t TxState;
__IO uint32_t RxState;
} USBD_CDC_HandleTypeDef;
/** @defgroup USBD_CORE_Exported_Macros
* @{
*/
/**
* @}
*/
/** @defgroup USBD_CORE_Exported_Variables
* @{
*/
extern USBD_ClassTypeDef USBD_CDC;
#define USBD_CDC_CLASS &USBD_CDC
/**
* @}
*/
/** @defgroup USB_CORE_Exported_Functions
* @{
*/
uint8_t USBD_CDC_RegisterInterface(USBD_HandleTypeDef *pdev,
USBD_CDC_ItfTypeDef *fops);
uint8_t USBD_CDC_SetTxBuffer(USBD_HandleTypeDef *pdev, uint8_t *pbuff,
uint32_t length);
uint8_t USBD_CDC_SetRxBuffer(USBD_HandleTypeDef *pdev, uint8_t *pbuff);
uint8_t USBD_CDC_ReceivePacket(USBD_HandleTypeDef *pdev, uint8_t epnum);
uint8_t USBD_CDC_TransmitPacket(USBD_HandleTypeDef *pdev, uint8_t epnum);
/**
* @}
*/
#ifdef __cplusplus
}
#endif
#endif /* __USB_CDC_H */
/**
* @}
*/
/**
* @}
*/
usbd_cdc.c
1、修改了描述符，8个字节IAD描述符 * 3、2路接口配置
2、修改了初始化函数，反初始化函数接口
3、修改了数据流转接口增加了端点地址参数
/**
******************************************************************************
* @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,
#if USE_CDC_IAD && USE_CDC_NUM == 2
0x02 * 2, /* bNumInterfaces: 2 interfaces */
#elif USE_CDC_IAD && USE_CDC_NUM == 3
0x02 * 3, /* bNumInterfaces: 2 interfaces */
#else
0x02, /* bNumInterfaces: 2 interfaces */
#endif
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) */
/*---------------------------------------------------------------------------*/
#if USE_CDC_IAD && USE_CDC_NUM >= 2
/* Interface Association Descriptor IAD描述符 -- 控制接口 0 */
0x08, /* bLength IAD描述符大小 */
0x0B, /* bDescriptorType IAD描述符类型 */
0x00, /* bFirstInterface 该IAD所聚合的多个接口中，首个索引编号 */
0x02, /* bInferfaceCount 该功能包含接口的数目 */
0x02, /* bFunctionClass 建议使用该IAD所聚合的多个interface中的第一个interface的对应参数，设备符中的bDeviceClass */
0x02, /* bFunctionSubClass 建议使用该IAD所聚合的多个interface中的第一个interface的对应参数，设备符中的bDeviceSubClass */
0x01, /* bFunctionProtocol 建议使用该IAD所聚合的多个interface中的第一个interface的对应参数，设备符中的bDeviceProtocol */
0x00, /* iFunction 描述该功能的字符串编号 */
/* 08 byte*/
#endif
/* 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 */
#if USE_CDC_IAD && USE_CDC_NUM >= 2
/* Interface Association Descriptor IAD描述符 -- 控制接口 0 */
0x08, /* bLength IAD描述符大小 */
0x0B, /* bDescriptorType IAD描述符类型 */
0x02, /* bFirstInterface 该IAD所聚合的多个接口中，首个索引编号 */
0x02, /* bInferfaceCount 该功能包含接口的数目 */
0x02, /* bFunctionClass 建议使用该IAD所聚合的多个interface中的第一个interface的对应参数，设备符中的bDeviceClass */
0x02, /* bFunctionSubClass 建议使用该IAD所聚合的多个interface中的第一个interface的对应参数，设备符中的bDeviceSubClass */
0x01, /* bFunctionProtocol 建议使用该IAD所聚合的多个interface中的第一个interface的对应参数，设备符中的bDeviceProtocol */
0x00, /* iFunction 描述该功能的字符串编号 */
/* 08 byte*/
/* Interface Descriptor */
0x09, /* bLength: Interface Descriptor size */
USB_DESC_TYPE_INTERFACE, /* bDescriptorType: Interface */
/* Interface descriptor type */
0x02, /* 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 */
0x02, /* bMasterInterface: Communication class interface */
0x03, /* bSlaveInterface0: Data Class Interface */
/* Endpoint 2 Descriptor */
0x07, /* bLength: Endpoint Descriptor size */
USB_DESC_TYPE_ENDPOINT, /* bDescriptorType: Endpoint */
CDC_CMD_EP5, /* 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: */
0x03, /* 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_EP2, /* 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_EP2, /* bEndpointAddress */
0x02, /* bmAttributes: Bulk */
LOBYTE(CDC_DATA_FS_MAX_PACKET_SIZE), /* wMaxPacketSize */
HIBYTE(CDC_DATA_FS_MAX_PACKET_SIZE),
0x00, /* bInterval */
#endif
#if USE_CDC_IAD && USE_CDC_NUM >= 3
/* Interface Association Descriptor IAD描述符 -- 控制接口 0 */
0x08, /* bLength IAD描述符大小 */
0x0B, /* bDescriptorType IAD描述符类型 */
0x04, /* bFirstInterface 该IAD所聚合的多个接口中，首个索引编号 */
0x02, /* bInferfaceCount 该功能包含接口的数目 */
0x02, /* bFunctionClass 建议使用该IAD所聚合的多个interface中的第一个interface的对应参数，设备符中的bDeviceClass */
0x02, /* bFunctionSubClass 建议使用该IAD所聚合的多个interface中的第一个interface的对应参数，设备符中的bDeviceSubClass */
0x01, /* bFunctionProtocol 建议使用该IAD所聚合的多个interface中的第一个interface的对应参数，设备符中的bDeviceProtocol */
0x00, /* iFunction 描述该功能的字符串编号 */
/* 08 byte*/
/* Interface Descriptor */
0x09, /* bLength: Interface Descriptor size */
USB_DESC_TYPE_INTERFACE, /* bDescriptorType: Interface */
/* Interface descriptor type */
0x04, /* 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 */
0x04, /* bMasterInterface: Communication class interface */
0x05, /* bSlaveInterface0: Data Class Interface */
/* Endpoint 2 Descriptor */
0x07, /* bLength: Endpoint Descriptor size */
USB_DESC_TYPE_ENDPOINT, /* bDescriptorType: Endpoint */
CDC_CMD_EP6, /* 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: */
0x05, /* 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_EP3, /* 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_EP3, /* bEndpointAddress */
0x02, /* bmAttributes: Bulk */
LOBYTE(CDC_DATA_FS_MAX_PACKET_SIZE), /* wMaxPacketSize */
HIBYTE(CDC_DATA_FS_MAX_PACKET_SIZE),
0x00, /* bInterval */
#endif
};
#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;
static uint32_t mem[(sizeof(USBD_CDC_HandleTypeDef)/4)+1];/* On 32-bit boundary */
hcdc = (USBD_CDC_HandleTypeDef *)mem;//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)
{
/* CDC1 */
/* 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;
#if USE_CDC_IAD && USE_CDC_NUM >= 2
/* CDC2 */
/* Open EP IN */
(void)USBD_LL_OpenEP(pdev, CDC_IN_EP2, USBD_EP_TYPE_BULK,
CDC_DATA_HS_IN_PACKET_SIZE);
pdev->ep_in[CDC_IN_EP2 & 0xFU].is_used = 1U;
/* Open EP OUT */
(void)USBD_LL_OpenEP(pdev, CDC_OUT_EP2, USBD_EP_TYPE_BULK,
CDC_DATA_HS_OUT_PACKET_SIZE);
pdev->ep_out[CDC_OUT_EP2 & 0xFU].is_used = 1U;
/* Set bInterval for CDC CMD Endpoint */
pdev->ep_in[CDC_CMD_EP5 & 0xFU].bInterval = CDC_HS_BINTERVAL;
#endif
#if USE_CDC_IAD && USE_CDC_NUM >= 3
/* CDC3 */
/* Open EP IN */
(void)USBD_LL_OpenEP(pdev, CDC_IN_EP3, USBD_EP_TYPE_BULK,
CDC_DATA_HS_IN_PACKET_SIZE);
pdev->ep_in[CDC_IN_EP3 & 0xFU].is_used = 1U;
/* Open EP OUT */
(void)USBD_LL_OpenEP(pdev, CDC_OUT_EP3, USBD_EP_TYPE_BULK,
CDC_DATA_HS_OUT_PACKET_SIZE);
pdev->ep_out[CDC_OUT_EP3 & 0xFU].is_used = 1U;
/* Set bInterval for CDC CMD Endpoint */
pdev->ep_in[CDC_CMD_EP6 & 0xFU].bInterval = CDC_HS_BINTERVAL;
#endif
}
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;
#if USE_CDC_IAD && USE_CDC_NUM >= 2
/* CDC2 */
/* Open EP IN */
(void)USBD_LL_OpenEP(pdev, CDC_IN_EP2, USBD_EP_TYPE_BULK,
CDC_DATA_FS_IN_PACKET_SIZE);
pdev->ep_in[CDC_IN_EP2 & 0xFU].is_used = 1U;
/* Open EP OUT */
(void)USBD_LL_OpenEP(pdev, CDC_OUT_EP2, USBD_EP_TYPE_BULK,
CDC_DATA_FS_OUT_PACKET_SIZE);
pdev->ep_out[CDC_OUT_EP2 & 0xFU].is_used = 1U;
/* Set bInterval for CDC CMD Endpoint */
pdev->ep_in[CDC_CMD_EP5 & 0xFU].bInterval = CDC_FS_BINTERVAL;
#endif
#if USE_CDC_IAD && USE_CDC_NUM >= 3
/* CDC3 */
/* Open EP IN */
(void)USBD_LL_OpenEP(pdev, CDC_IN_EP3, USBD_EP_TYPE_BULK,
CDC_DATA_FS_IN_PACKET_SIZE);
pdev->ep_in[CDC_IN_EP3 & 0xFU].is_used = 1U;
/* Open EP OUT */
(void)USBD_LL_OpenEP(pdev, CDC_OUT_EP3, USBD_EP_TYPE_BULK,
CDC_DATA_FS_OUT_PACKET_SIZE);
pdev->ep_out[CDC_OUT_EP3 & 0xFU].is_used = 1U;
/* Set bInterval for CDC CMD Endpoint */
pdev->ep_in[CDC_CMD_EP6 & 0xFU].bInterval = CDC_FS_BINTERVAL;
#endif
}
/* 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;
#if USE_CDC_IAD && USE_CDC_NUM >= 2
(void)USBD_LL_OpenEP(pdev, CDC_CMD_EP5, USBD_EP_TYPE_INTR, CDC_CMD_PACKET_SIZE);
pdev->ep_in[CDC_CMD_EP5 & 0xFU].is_used = 1U;
#endif
#if USE_CDC_IAD && USE_CDC_NUM >= 3
(void)USBD_LL_OpenEP(pdev, CDC_CMD_EP6, USBD_EP_TYPE_INTR, CDC_CMD_PACKET_SIZE);
pdev->ep_in[CDC_CMD_EP6 & 0xFU].is_used = 1U;
#endif
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);
#if USE_CDC_IAD && USE_CDC_NUM >= 2
(void)USBD_LL_PrepareReceive(pdev, CDC_OUT_EP2, hcdc->RxBuffer,
CDC_DATA_HS_OUT_PACKET_SIZE);
#endif
#if USE_CDC_IAD && USE_CDC_NUM >= 3
(void)USBD_LL_PrepareReceive(pdev, CDC_OUT_EP3, hcdc->RxBuffer,
CDC_DATA_HS_OUT_PACKET_SIZE);
#endif
}
else
{
/* Prepare Out endpoint to receive next packet */
(void)USBD_LL_PrepareReceive(pdev, CDCOutEpAdd, hcdc->RxBuffer,
CDC_DATA_FS_OUT_PACKET_SIZE);
#if USE_CDC_IAD && USE_CDC_NUM >= 2
(void)USBD_LL_PrepareReceive(pdev, CDC_OUT_EP2, hcdc->RxBuffer,
CDC_DATA_FS_OUT_PACKET_SIZE);
#endif
#if USE_CDC_IAD && USE_CDC_NUM >= 3
(void)USBD_LL_PrepareReceive(pdev, CDC_OUT_EP3, hcdc->RxBuffer,
CDC_DATA_FS_OUT_PACKET_SIZE);
#endif
}
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, CDC_IN_EP, USBD_EP_TYPE_BULK);
CDCOutEpAdd = USBD_CoreGetEPAdd(pdev, CDC_OUT_EP, USBD_EP_TYPE_BULK);
CDCCmdEpAdd = USBD_CoreGetEPAdd(pdev, CDC_CMD_EP, 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;
#if USE_CDC_IAD && USE_CDC_NUM >= 2
/* Close EP2 IN */
(void)USBD_LL_CloseEP(pdev, CDC_IN_EP2);
pdev->ep_in[CDC_IN_EP2 & 0xFU].is_used = 0U;
/* Close EP2 OUT */
(void)USBD_LL_CloseEP(pdev, CDC_OUT_EP2);
pdev->ep_out[CDC_OUT_EP2 & 0xFU].is_used = 0U;
/* Close Command IN EP5 */
(void)USBD_LL_CloseEP(pdev, CDC_CMD_EP5);
pdev->ep_in[CDC_CMD_EP5 & 0xFU].is_used = 0U;
pdev->ep_in[CDC_CMD_EP5 & 0xFU].bInterval = 0U;
#endif
#if USE_CDC_IAD && USE_CDC_NUM >= 3
/* Close EP3 IN */
(void)USBD_LL_CloseEP(pdev, CDC_IN_EP3);
pdev->ep_in[CDC_IN_EP3 & 0xFU].is_used = 0U;
/* Close EP3 OUT */
(void)USBD_LL_CloseEP(pdev, CDC_OUT_EP3);
pdev->ep_out[CDC_OUT_EP3 & 0xFU].is_used = 0U;
/* Close Command IN EP6 */
(void)USBD_LL_CloseEP(pdev, CDC_CMD_EP6);
pdev->ep_in[CDC_CMD_EP6 & 0xFU].is_used = 0U;
pdev->ep_in[CDC_CMD_EP6 & 0xFU].bInterval = 0U;
#endif
/* 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, epnum);
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
* @param epnum: 输入端点地址
* @retval status
*/
uint8_t USBD_CDC_TransmitPacket(USBD_HandleTypeDef *pdev, uint8_t epnum)
{
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[epnum & 0xFU].total_length = hcdc->TxLength;
/* Transmit next packet */
(void)USBD_LL_Transmit(pdev, epnum, hcdc->TxBuffer, hcdc->TxLength);
ret = USBD_OK;
}
return (uint8_t)ret;
}
/**
* @brief USBD_CDC_ReceivePacket
* prepare OUT Endpoint for reception
* @param pdev: device instance
* @param epnum: 输出端点地址
* @retval status
*/
uint8_t USBD_CDC_ReceivePacket(USBD_HandleTypeDef *pdev, uint8_t epnum)
{
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, epnum, hcdc->RxBuffer,
CDC_DATA_HS_OUT_PACKET_SIZE);
}
else
{
/* Prepare Out endpoint to receive next packet */
(void)USBD_LL_PrepareReceive(pdev, epnum, hcdc->RxBuffer,
CDC_DATA_FS_OUT_PACKET_SIZE);
}
return (uint8_t)USBD_OK;
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
接口修改
usbd_cdc_if.c
/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file : usbd_cdc_if.c
* @version : v1.0_Cube
* @brief : Usb device for Virtual Com Port.
******************************************************************************
* @attention
*
* Copyright (c) 2022 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.
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "usbd_cdc_if.h"
/* USER CODE BEGIN INCLUDE */
/* USER CODE END INCLUDE */
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PV */
/* Private variables ---------------------------------------------------------*/
/* USER CODE END PV */
/** @addtogroup STM32_USB_OTG_DEVICE_LIBRARY
* @brief Usb device library.
* @{
*/
/** @addtogroup USBD_CDC_IF
* @{
*/
/** @defgroup USBD_CDC_IF_Private_TypesDefinitions USBD_CDC_IF_Private_TypesDefinitions
* @brief Private types.
* @{
*/
/* USER CODE BEGIN PRIVATE_TYPES */
/* USER CODE END PRIVATE_TYPES */
/**
* @}
*/
/** @defgroup USBD_CDC_IF_Private_Defines USBD_CDC_IF_Private_Defines
* @brief Private defines.
* @{
*/
/* USER CODE BEGIN PRIVATE_DEFINES */
/* USER CODE END PRIVATE_DEFINES */
/**
* @}
*/
/** @defgroup USBD_CDC_IF_Private_Macros USBD_CDC_IF_Private_Macros
* @brief Private macros.
* @{
*/
/* USER CODE BEGIN PRIVATE_MACRO */
/* USER CODE END PRIVATE_MACRO */
/**
* @}
*/
/** @defgroup USBD_CDC_IF_Private_Variables USBD_CDC_IF_Private_Variables
* @brief Private variables.
* @{
*/
/* Create buffer for reception and transmission */
/* It's up to user to redefine and/or remove those define */
/** Received data over USB are stored in this buffer */
uint8_t UserRxBufferFS[APP_RX_DATA_SIZE];
/** Data to send over USB CDC are stored in this buffer */
uint8_t UserTxBufferFS[APP_TX_DATA_SIZE];
/* USER CODE BEGIN PRIVATE_VARIABLES */
/* USER CODE END PRIVATE_VARIABLES */
/**
* @}
*/
/** @defgroup USBD_CDC_IF_Exported_Variables USBD_CDC_IF_Exported_Variables
* @brief Public variables.
* @{
*/
extern USBD_HandleTypeDef hUsbDeviceFS;
/* USER CODE BEGIN EXPORTED_VARIABLES */
/* USER CODE END EXPORTED_VARIABLES */
/**
* @}
*/
/** @defgroup USBD_CDC_IF_Private_FunctionPrototypes USBD_CDC_IF_Private_FunctionPrototypes
* @brief Private functions declaration.
* @{
*/
static int8_t CDC_Init_FS(void);
static int8_t CDC_DeInit_FS(void);
static int8_t CDC_Control_FS(uint8_t cmd, uint8_t* pbuf, uint16_t length);
static int8_t CDC_Receive_FS(uint8_t* pbuf, uint32_t *Len, uint8_t epnum);
static int8_t CDC_TransmitCplt_FS(uint8_t *pbuf, uint32_t *Len, uint8_t epnum);
/* USER CODE BEGIN PRIVATE_FUNCTIONS_DECLARATION */
/* USER CODE END PRIVATE_FUNCTIONS_DECLARATION */
/**
* @}
*/
USBD_CDC_ItfTypeDef USBD_Interface_fops_FS =
{
CDC_Init_FS,
CDC_DeInit_FS,
CDC_Control_FS,
CDC_Receive_FS,
CDC_TransmitCplt_FS
};
/* Private functions ---------------------------------------------------------*/
/**
* @brief Initializes the CDC media low layer over the FS USB IP
* @retval USBD_OK if all operations are OK else USBD_FAIL
*/
static int8_t CDC_Init_FS(void)
{
/* USER CODE BEGIN 3 */
/* Set Application Buffers */
USBD_CDC_SetTxBuffer(&hUsbDeviceFS, UserTxBufferFS, 0);
USBD_CDC_SetRxBuffer(&hUsbDeviceFS, UserRxBufferFS);
return (USBD_OK);
/* USER CODE END 3 */
}
/**
* @brief DeInitializes the CDC media low layer
* @retval USBD_OK if all operations are OK else USBD_FAIL
*/
static int8_t CDC_DeInit_FS(void)
{
/* USER CODE BEGIN 4 */
return (USBD_OK);
/* USER CODE END 4 */
}
/**
* @brief Manage the CDC class requests
* @param cmd: Command code
* @param pbuf: Buffer containing command data (request parameters)
* @param length: Number of data to be sent (in bytes)
* @retval Result of the operation: USBD_OK if all operations are OK else USBD_FAIL
*/
static int8_t CDC_Control_FS(uint8_t cmd, uint8_t* pbuf, uint16_t length)
{
/* USER CODE BEGIN 5 */
switch(cmd)
{
case CDC_SEND_ENCAPSULATED_COMMAND:
break;
case CDC_GET_ENCAPSULATED_RESPONSE:
break;
case CDC_SET_COMM_FEATURE:
break;
case CDC_GET_COMM_FEATURE:
break;
case CDC_CLEAR_COMM_FEATURE:
break;
/*******************************************************************************/
/* Line Coding Structure */
/*-----------------------------------------------------------------------------*/
/* Offset | Field | Size | Value | Description */
/* 0 | dwDTERate | 4 | Number |Data terminal rate, in bits per second*/
/* 4 | bCharFormat | 1 | Number | Stop bits */
/* 0 - 1 Stop bit */
/* 1 - 1.5 Stop bits */
/* 2 - 2 Stop bits */
/* 5 | bParityType | 1 | Number | Parity */
/* 0 - None */
/* 1 - Odd */
/* 2 - Even */
/* 3 - Mark */
/* 4 - Space */
/* 6 | bDataBits | 1 | Number Data bits (5, 6, 7, 8 or 16). */
/*******************************************************************************/
case CDC_SET_LINE_CODING:
break;
case CDC_GET_LINE_CODING:
break;
case CDC_SET_CONTROL_LINE_STATE:
break;
case CDC_SEND_BREAK:
break;
default:
break;
}
return (USBD_OK);
/* USER CODE END 5 */
}
/**
* @brief Data received over USB OUT endpoint are sent over CDC interface
* through this function.
*
* @note
* This function will issue a NAK packet on any OUT packet received on
* USB endpoint until exiting this function. If you exit this function
* before transfer is complete on CDC interface (ie. using DMA controller)
* it will result in receiving more data while previous ones are still
* not sent.
*
* @param Buf: Buffer of data to be received
* @param Len: Number of data received (in bytes)
* @param epnum: 输出端点地址
* @retval Result of the operation: USBD_OK if all operations are OK else USBD_FAIL
*/
static int8_t CDC_Receive_FS(uint8_t* Buf, uint32_t *Len, uint8_t epnum)
{
/* USER CODE BEGIN 6 */
USBD_CDC_SetRxBuffer(&hUsbDeviceFS, &Buf[0]);
USBD_CDC_ReceivePacket(&hUsbDeviceFS, epnum);
CDC_Transmit_FS(Buf, *Len, epnum);
return (USBD_OK);
/* USER CODE END 6 */
}
/**
* @brief CDC_Transmit_FS
* Data to send over USB IN endpoint are sent over CDC interface
* through this function.
* @note
*
*
* @param Buf: Buffer of data to be sent
* @param Len: Number of data to be sent (in bytes)
* @param epnum: 输入端点地址
* @retval USBD_OK if all operations are OK else USBD_FAIL or USBD_BUSY
*/
uint8_t CDC_Transmit_FS(uint8_t* Buf, uint16_t Len, uint8_t epnum)
{
uint8_t result = USBD_OK;
/* USER CODE BEGIN 7 */
USBD_CDC_HandleTypeDef *hcdc = (USBD_CDC_HandleTypeDef*)hUsbDeviceFS.pClassData;
if (hcdc->TxState != 0){
return USBD_BUSY;
}
USBD_CDC_SetTxBuffer(&hUsbDeviceFS, Buf, Len);
result = USBD_CDC_TransmitPacket(&hUsbDeviceFS, epnum);
/* USER CODE END 7 */
return result;
}
/**
* @brief CDC_TransmitCplt_FS
* Data transmitted callback
*
* @note
* This function is IN transfer complete callback used to inform user that
* the submitted Data is successfully sent over USB.
*
* @param Buf: Buffer of data to be received
* @param Len: Number of data received (in bytes)
* @retval Result of the operation: USBD_OK if all operations are OK else USBD_FAIL
*/
static int8_t CDC_TransmitCplt_FS(uint8_t *Buf, uint32_t *Len, uint8_t epnum)
{
uint8_t result = USBD_OK;
/* USER CODE BEGIN 13 */
UNUSED(Buf);
UNUSED(Len);
UNUSED(epnum);
/* USER CODE END 13 */
return result;
}
/* USER CODE BEGIN PRIVATE_FUNCTIONS_IMPLEMENTATION */
/* USER CODE END PRIVATE_FUNCTIONS_IMPLEMENTATION */
/**
* @}
*/
/**
* @}
*/
usbd_cdc_if.h
/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file : usbd_cdc_if.h
* @version : v1.0_Cube
* @brief : Header for usbd_cdc_if.c file.
******************************************************************************
* @attention
*
* Copyright (c) 2022 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.
*
******************************************************************************
*/
/* USER CODE END Header */
/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __USBD_CDC_IF_H__
#define __USBD_CDC_IF_H__
#ifdef __cplusplus
extern "C" {
#endif
/* Includes ------------------------------------------------------------------*/
#include "usbd_cdc.h"
/* USER CODE BEGIN INCLUDE */
/* USER CODE END INCLUDE */
/** @addtogroup STM32_USB_OTG_DEVICE_LIBRARY
* @brief For Usb device.
* @{
*/
/** @defgroup USBD_CDC_IF USBD_CDC_IF
* @brief Usb VCP device module
* @{
*/
/** @defgroup USBD_CDC_IF_Exported_Defines USBD_CDC_IF_Exported_Defines
* @brief Defines.
* @{
*/
/* Define size for the receive and transmit buffer over CDC */
#define APP_RX_DATA_SIZE 512
#define APP_TX_DATA_SIZE 512
/* USER CODE BEGIN EXPORTED_DEFINES */
/* USER CODE END EXPORTED_DEFINES */
/**
* @}
*/
/** @defgroup USBD_CDC_IF_Exported_Types USBD_CDC_IF_Exported_Types
* @brief Types.
* @{
*/
/* USER CODE BEGIN EXPORTED_TYPES */
/* USER CODE END EXPORTED_TYPES */
/**
* @}
*/
/** @defgroup USBD_CDC_IF_Exported_Macros USBD_CDC_IF_Exported_Macros
* @brief Aliases.
* @{
*/
/* USER CODE BEGIN EXPORTED_MACRO */
/* USER CODE END EXPORTED_MACRO */
/**
* @}
*/
/** @defgroup USBD_CDC_IF_Exported_Variables USBD_CDC_IF_Exported_Variables
* @brief Public variables.
* @{
*/
/** CDC Interface callback. */
extern USBD_CDC_ItfTypeDef USBD_Interface_fops_FS;
/* USER CODE BEGIN EXPORTED_VARIABLES */
/* USER CODE END EXPORTED_VARIABLES */
/**
* @}
*/
/** @defgroup USBD_CDC_IF_Exported_FunctionsPrototype USBD_CDC_IF_Exported_FunctionsPrototype
* @brief Public functions declaration.
* @{
*/
uint8_t CDC_Transmit_FS(uint8_t* Buf, uint16_t Len, uint8_t epnum);
/* USER CODE BEGIN EXPORTED_FUNCTIONS */
/* USER CODE END EXPORTED_FUNCTIONS */
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
#ifdef __cplusplus
}
#endif
#endif /* __USBD_CDC_IF_H__ */
FIFO配置
usbd_conf.c
/* EP_OUT: 0x00(64) 0x01(64) 0x02(64) 0x03(64) 0x04(NULL fill 64) 0x05(NULL fill 64) 0x06(NULL fill 64) 最小64Bytes，HAL_PCDEx_SetRxFiFo每个数值代表4Bytes */
HAL_PCDEx_SetRxFiFo(&hpcd_USB_OTG_FS, 16 + 16 * 6);
/* EP_IN: 0x80(64) 0x81(64) 0x82(64) 0x83(64) 0x84(8) 0x85(8) 0x86(8) */
HAL_PCDEx_SetTxFiFo(&hpcd_USB_OTG_FS, 0, 16);
HAL_PCDEx_SetTxFiFo(&hpcd_USB_OTG_FS, 1, 16);
HAL_PCDEx_SetTxFiFo(&hpcd_USB_OTG_FS, 2, 16);
HAL_PCDEx_SetTxFiFo(&hpcd_USB_OTG_FS, 3, 16);
HAL_PCDEx_SetTxFiFo(&hpcd_USB_OTG_FS, 4, 16);
HAL_PCDEx_SetTxFiFo(&hpcd_USB_OTG_FS, 5, 16);
HAL_PCDEx_SetTxFiFo(&hpcd_USB_OTG_FS, 6, 16);
知识点
FIFO分配
TXn最小大小= 16个字。
TXn min size = 16 words.
(n:发送FIFO索引)
(n : Transmit FIFO index)
当不使用TxFIFO时，配置如下:
When a TxFIFO is not used, the Configuration should be as follows:
情况1:n > m and Txn未被使用(n,m: Transmit FIFO indexes)
case 1 : n > m and Txn is not used (n,m : Transmit FIFO indexes)
——> Txm可以使用分配给Txn的空间。
--> Txm can use the space allocated for Txn.
case2: n < m, Txn未被使用(n,m:发送FIFO索引)
case2 : n < m and Txn is not used (n,m : Transmit FIFO indexes)
——> Txn应配置为16个word的最小空间，即64Bytes
--> Txn should be configured with the minimum space of 16 words
当使用txfifo在顶部分配时，FIFO被最优地使用
The FIFO is used optimally when used TxFIFOs are allocated in the top
FIFO。
of the FIFO.
例如:使用“EP1”和“EP2”作为IN，不使用“EP1”和“EP3”作为IN。
Ex: use EP1 and EP2 as IN instead of EP1 and EP3 as IN ones.
当使用DMA时，3n * FIFO位置应该为内部DMA寄存器保留
When DMA is used 3n * FIFO locations should be reserved for internal DMA registers
上面的意思是：在我们使用的端点地址中，存在某些未被使用的端点地址，分为两种情况：
比如多路CDC中，我们使用了 （有数字的代表该端点地址数据包大小，NULL代表未使用，NULL fill代表未使用但需要填充）：
EP_OUT: 0x00(64) 0x01(64) 0x02(64) 0x03(64) 0x04(NULL) 0x05(NULL) 0x06(NULL)
EP_IN: 0x80(64) 0x81(64) 0x82(64) 0x83(64) 0x84(8) 0x85(8) 0x86(8)
4、5、6三个EP_IN未使用，它属于：
情况1:n > m and Txn未被使用(n,m: Transmit FIFO indexes)
—> Txm可以使用分配给Txn的空间
如果我们不用1、2、3，而使用4、5、6，则我们需要预留最小的空间给1 、2 、3
不同芯片，对应USB FIFO空间大小不同需要对照手册
HAL_PCDEx_SetRxFiFo需要先设置，接收缓冲区共用一块大小，函数接口大小设置单位是：word，即设置1代表4个字节大小
注意事项
CDC配置的包大小，需要根据实际数据通讯场景，如果设的每包大小，小于实际每次传输的包那就会丢包，如果设大，不能超过FIFO的总大小！
参考引用：http://t.csdn.cn/Gvr4P