大家好，
最近在弄一个HID+MSC的复合设备，基于STM32_USB-Host-Device_Lib_V2.2.0 库进行修改。
芯片使用的是STM32F429IG
下面是我的端点定义
#define MSC_IN_EP                    0x81       //bit7: 0-OUT  1-IN 即0X8x 为输入端点x
#define MSC_OUT_EP                 0x01

#define MSC_MAX_PACKET          64
#define MSC_MEDIA_PACKET       32*1024   

#define HID_IN_EP                    0x82
#define HID_OUT_EP                 0x02

#define HID_IN_PACKET                0x40
#define HID_OUT_PACKET             0x40


端点1用于MSC，端点2用于HID设备。

我遇到的问题是，系统能正常枚举复合设备，且能正常读写MSC设备。
HID端点STM32能正常接收，但是PC却收不到HID发送的数据。
也就是说0x82端点没有起到发送的作用，找了很久没找到原因。

把MSC的端点和HID的端点互换，也就是改成
#define MSC_IN_EP                    0x82       //bit7: 0-OUT  1-IN 即0X8x 为输入端点x
#define MSC_OUT_EP                 0x02


#define HID_IN_EP                    0x81
#define HID_OUT_EP                 0x01

此时HID能正常收发，MSC设备无法识别。

只有端点1能正常工作，似乎是哪里还没有改到，
请帮忙看一下，感谢。

这里是我目前的usbd_customhid_core.c文件中的设备配置描述符和报告描述符


/* USB HID device Configuration Descriptor */
__ALIGN_BEGIN static uint8_t USBD_CUSTOM_HID_CfgDesc[USB_CUSTOM_HID_CONFIG_DESC_SIZ] __ALIGN_END =
{
0x09, /* bLength: Configuration Descriptor size */
  USB_CONFIGURATION_DESCRIPTOR_TYPE, /* bDescriptorType: Configuration */
  USB_CUSTOM_HID_CONFIG_DESC_SIZ,
  /* wTotalLength: Bytes returned */
  0x00,
  0x01,         /*bNumInterfaces: 1 interface*/
  0x01,         /*bConfigurationValue: Configuration value*/
  0x00,         /*iConfiguration: Index of string descriptor describing
  the configuration*/
  0xC0,         /*bmAttributes: bus powered and Support Remote Wake-up */
  0x32,         /*MaxPower 100 mA: this current is used for detecting Vbus*/

  /************** Descriptor of Custom HID interface ****************/
  /* 09 */
  0x09,         /*bLength: Interface Descriptor size*/
  USB_INTERFACE_DESCRIPTOR_TYPE,/*bDescriptorType: Interface descriptor type*/
  0x00,         /*bInterfaceNumber: Number of Interface*/
  0x00,         /*bAlternateSetting: Alternate setting*/
  0x02,         /*bNumEndpoints*/
  0x03,         /*bInterfaceClass: HID*/
  0x00,         /*bInterfaceSubClass : 1=BOOT, 0=no boot*/
  0x00,         /*nInterfaceProtocol : 0=none, 1=keyboard, 2=mouse*/
  0,            /*iInterface: Index of string descriptor*/
  /******************** Descriptor of Custom HID ********************/
  /* 18 */
  0x09,         /*bLength: HID Descriptor size*/
  CUSTOM_HID_DESCRIPTOR_TYPE, /*bDescriptorType: HID*/
  0x11,         /*bcdHID: HID Class Spec release number*/
  0x01,
  0x00,         /*bCountryCode: Hardware target country*/
  0x01,         /*bNumDescriptors: Number of HID class descriptors to follow*/
  0x22,         /*bDescriptorType*/
  USBD_CUSTOM_HID_REPORT_DESC_SIZE,/*wItemLength: Total length of Report descriptor*/
  0x00,
  /******************** Descriptor of Custom HID endpoints ***********/
  /* 27 */
  0x07,          /* bLength: Endpoint Descriptor size */
  USB_ENDPOINT_DESCRIPTOR_TYPE, /* bDescriptorType: */

  HID_IN_EP,     /* bEndpointAddress: Endpoint Address (IN) */
  0x03,          /* bmAttributes: Interrupt endpoint */
  0x40,  //HID_IN_PACKET, /* wMaxPacketSize:  Bytes max */
  0x00,
  0x20,          /* bInterval: Polling Interval (32 ms) */
  /* 34 */

  0x07,                 /* bLength: Endpoint Descriptor size */
  USB_ENDPOINT_DESCRIPTOR_TYPE,        /* bDescriptorType: */
  /*        Endpoint descriptor type */
  HID_OUT_EP,        /* bEndpointAddress: */
  /*        Endpoint Address (OUT) */
  0x03,        /* bmAttributes: Interrupt endpoint */
  0x40, //HID_OUT_PACKET,        /* wMaxPacketSize: 2 Bytes max  */
  0x00,
  0x20,        /* bInterval: Polling Interval (20 ms) */
  /* 41 */
} ;

__ALIGN_BEGIN static uint8_t CustomHID_ReportDesc[USBD_CUSTOM_HID_REPORT_DESC_SIZE] __ALIGN_END =
{
  0x06,0x00,0xff,/* USAGE_PAGE  */
  0x05, 0x8c, /* USAGE_PAGE (ST Page) */
  0x09, 0x01, /* USAGE (Demo Kit) */
  0xa1, 0x01, /* COLLECTION (Application) */

  // The Input report
  0x09,0x03, // USAGE ID - Vendor defined
  0x15,0x00, // LOGICAL_MINIMUM (0)
  0x26,0x00, 0xFF, // LOGICAL_MAXIMUM (255)
  0x75,0x08, // REPORT_SIZE (8bit)
  0x95,0x40, // REPORT_COUNT (64Byte)
  0x81,0x02, // INPUT (Data,Var,Abs)

  // The Output report
  0x09,0x04, // USAGE ID - Vendor defined
  0x15,0x00, // LOGICAL_MINIMUM (0)
  0x26,0x00,0xFF, // LOGICAL_MAXIMUM (255)
  0x75,0x08, // REPORT_SIZE (8bit)
  0x95,0x40, // REPORT_COUNT (64Byte)
  0x91,0x02, // OUTPUT (Data,Var,Abs)
  0xc0                          /*     END_COLLECTION                     */
};

流水源 发表于 2020-5-13 08:40
代码都没有怎么看？

不好意思，我可能说的不够清楚，因为是在STM32_USB-Host-Device_Lib_V2.2.0库的基础上修改的，只修改了usbd_customhid_core.c这个文件的内容。我把完整的内容贴出来。

/**
  ******************************************************************************
  * @file    usbd_customhid_core.c
  * @author  MCD Application Team
  * @version V1.2.0
  * @date    09-November-2015
  * @brief   This file provides the CUSTOM_HID core functions.
  *
  * @verbatim
  *      
  *          ===================================================================      
  *                                CUSTOM_HID Class  Description
  *          ===================================================================
  *           This module manages the HID class V1.11 following the "Device Class Definition
  *           for Human Interface Devices (CUSTOM_HID) Version 1.11 Jun 27, 2001".
  *           This driver implements the following aspects of the specification:
  *             - The Boot Interface Subclass
  *             - The Mouse protocol
  *             - Usage Page : Generic Desktop
  *             - Usage : Vendor
  *             - Collection : Application
  *      
  * @note     In HS mode and when the DMA is used, all variables and data structures
  *           dealing with the DMA during the transaction process should be 32-bit aligned.
  *           
  *      
  *  @endverbatim
  *
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; 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_customhid_core.h"
#include "usbd_desc.h"
#include "usbd_req.h"

extern void addData2RcvBuffer(u8 *pData, u8 Len);


/** @defgroup USBD_CUSTOM_HID_Private_FunctionPrototypes
  * @{
  */


uint8_t  USBD_CUSTOM_HID_Init (void  *pdev,
                               uint8_t cfgidx);

uint8_t  USBD_CUSTOM_HID_DeInit (void  *pdev,
                                 uint8_t cfgidx);

uint8_t  USBD_CUSTOM_HID_Setup (void  *pdev,
                                USB_SETUP_REQ *req);

static uint8_t  *USBD_CUSTOM_HID_GetCfgDesc (uint8_t speed, uint16_t *length);

uint8_t  USBD_CUSTOM_HID_DataIn (void  *pdev, uint8_t epnum);
uint8_t  USBD_CUSTOM_HID_DataOut (void  *pdev, uint8_t epnum);
uint8_t  USBD_CUSTOM_HID_EP0_RxReady (void  *pdev);
/**
  * @}
  */

/** @defgroup USBD_HID_Private_Variables
  * @{
  */

USBD_Class_cb_TypeDef  USBD_CUSTOMHID_cb =
{
  USBD_CUSTOM_HID_Init,
  USBD_CUSTOM_HID_DeInit,
  USBD_CUSTOM_HID_Setup,
  NULL, /*EP0_TxSent*/  
  USBD_CUSTOM_HID_EP0_RxReady, /*EP0_RxReady*/ /* STATUS STAGE IN */
  USBD_CUSTOM_HID_DataIn, /*DataIn*/
  USBD_CUSTOM_HID_DataOut,
  NULL, /*SOF */
  NULL,
  NULL,      
  USBD_CUSTOM_HID_GetCfgDesc,
#ifdef USB_OTG_HS_CORE  
  USBD_CUSTOM_HID_GetCfgDesc, /* use same config as per FS */
#endif  
};

uint8_t USB_HID_RcvBuf[64];
uint8_t USBD_HID_Report_ID=0;
__IO uint32_t IsReportAvailable = 0;
uint8_t usbRcvCnt = 0;
//extern uint8_t PrevXferDone;


#ifdef USB_OTG_HS_INTERNAL_DMA_ENABLED
  #if defined ( __ICCARM__ ) /*!< IAR Compiler */
    #pragma data_alignment=4   
  #endif
#endif /* USB_OTG_HS_INTERNAL_DMA_ENABLED */        
__ALIGN_BEGIN static uint32_t  USBD_HID_AltSet  __ALIGN_END = 0;

#ifdef USB_OTG_HS_INTERNAL_DMA_ENABLED
  #if defined ( __ICCARM__ ) /*!< IAR Compiler */
    #pragma data_alignment=4   
  #endif
#endif /* USB_OTG_HS_INTERNAL_DMA_ENABLED */      
__ALIGN_BEGIN static uint32_t  USBD_HID_Protocol  __ALIGN_END = 0;

#ifdef USB_OTG_HS_INTERNAL_DMA_ENABLED
  #if defined ( __ICCARM__ ) /*!< IAR Compiler */
    #pragma data_alignment=4   
  #endif
#endif /* USB_OTG_HS_INTERNAL_DMA_ENABLED */  
__ALIGN_BEGIN static uint32_t  USBD_HID_IdleState __ALIGN_END = 0;

#ifdef USB_OTG_HS_INTERNAL_DMA_ENABLED
  #if defined ( __ICCARM__ ) /*!< IAR Compiler */
    #pragma data_alignment=4   
  #endif
#endif /* USB_OTG_HS_INTERNAL_DMA_ENABLED */
/* USB HID device Configuration Descriptor */
__ALIGN_BEGIN static uint8_t USBD_CUSTOM_HID_CfgDesc[USB_CUSTOM_HID_CONFIG_DESC_SIZ] __ALIGN_END =
{
0x09, /* bLength: Configuration Descriptor size */
  USB_CONFIGURATION_DESCRIPTOR_TYPE, /* bDescriptorType: Configuration */
  USB_CUSTOM_HID_CONFIG_DESC_SIZ,
  /* wTotalLength: Bytes returned */
  0x00,
  0x01,         /*bNumInterfaces: 1 interface*/
  0x01,         /*bConfigurationValue: Configuration value*/
  0x00,         /*iConfiguration: Index of string descriptor describing
  the configuration*/
  0xC0,         /*bmAttributes: bus powered and Support Remote Wake-up */
  0x32,         /*MaxPower 100 mA: this current is used for detecting Vbus*/

  /************** Descriptor of Custom HID interface ****************/
  /* 09 */
  0x09,         /*bLength: Interface Descriptor size*/
  USB_INTERFACE_DESCRIPTOR_TYPE,/*bDescriptorType: Interface descriptor type*/
  0x00,         /*bInterfaceNumber: Number of Interface*/
  0x00,         /*bAlternateSetting: Alternate setting*/
  0x02,         /*bNumEndpoints*/
  0x03,         /*bInterfaceClass: HID*/
  0x00,         /*bInterfaceSubClass : 1=BOOT, 0=no boot*/
  0x00,         /*nInterfaceProtocol : 0=none, 1=keyboard, 2=mouse*/
  0,            /*iInterface: Index of string descriptor*/
  /******************** Descriptor of Custom HID ********************/
  /* 18 */
  0x09,         /*bLength: HID Descriptor size*/
  CUSTOM_HID_DESCRIPTOR_TYPE, /*bDescriptorType: HID*/
  0x11,         /*bcdHID: HID Class Spec release number*/
  0x01,
  0x00,         /*bCountryCode: Hardware target country*/
  0x01,         /*bNumDescriptors: Number of HID class descriptors to follow*/
  0x22,         /*bDescriptorType*/
  USBD_CUSTOM_HID_REPORT_DESC_SIZE,/*wItemLength: Total length of Report descriptor*/
  0x00,
  /******************** Descriptor of Custom HID endpoints ***********/
  /* 27 */
  0x07,          /* bLength: Endpoint Descriptor size */
  USB_ENDPOINT_DESCRIPTOR_TYPE, /* bDescriptorType: */

  HID_IN_EP,     /* bEndpointAddress: Endpoint Address (IN) */
  0x03,          /* bmAttributes: Interrupt endpoint */
  0x40,  //HID_IN_PACKET, /* wMaxPacketSize:  Bytes max */
  0x00,
  0x20,          /* bInterval: Polling Interval (32 ms) */
  /* 34 */

  0x07,                 /* bLength: Endpoint Descriptor size */
  USB_ENDPOINT_DESCRIPTOR_TYPE,        /* bDescriptorType: */
  /*        Endpoint descriptor type */
  HID_OUT_EP,        /* bEndpointAddress: */
  /*        Endpoint Address (OUT) */
  0x03,        /* bmAttributes: Interrupt endpoint */
  0x40, //HID_OUT_PACKET,        /* wMaxPacketSize: 2 Bytes max  */
  0x00,
  0x20,        /* bInterval: Polling Interval (20 ms) */
  /* 41 */
} ;

#ifdef USB_OTG_HS_INTERNAL_DMA_ENABLED
  #if defined ( __ICCARM__ ) /*!< IAR Compiler */
    #pragma data_alignment=4   
  #endif
#endif

__ALIGN_BEGIN static uint8_t CustomHID_ReportDesc[USBD_CUSTOM_HID_REPORT_DESC_SIZE] __ALIGN_END =
{
  0x06,0x00,0xff,/* USAGE_PAGE  */
  0x05, 0x8c, /* USAGE_PAGE (ST Page) */
  0x09, 0x01, /* USAGE (Demo Kit) */
  0xa1, 0x01, /* COLLECTION (Application) */

  // The Input report
  0x09,0x03, // USAGE ID - Vendor defined
  0x15,0x00, // LOGICAL_MINIMUM (0)
  0x26,0x00, 0xFF, // LOGICAL_MAXIMUM (255)
  0x75,0x08, // REPORT_SIZE (8bit)
  0x95,0x40, // REPORT_COUNT (64Byte)
  0x81,0x02, // INPUT (Data,Var,Abs)

  // The Output report
  0x09,0x04, // USAGE ID - Vendor defined
  0x15,0x00, // LOGICAL_MINIMUM (0)
  0x26,0x00,0xFF, // LOGICAL_MAXIMUM (255)
  0x75,0x08, // REPORT_SIZE (8bit)
  0x95,0x40, // REPORT_COUNT (64Byte)
  0x91,0x02, // OUTPUT (Data,Var,Abs)
  0xc0                          /*     END_COLLECTION                     */

};

/**
  * @}
  */

/** @defgroup USBD_HID_Private_Functions
  * @{
  */

/**
  * @brief  USBD_HID_Init
  *         Initialize the HID interface
  * @param  pdev: device instance
  * @param  cfgidx: Configuration index
  * @retval status
  */
uint8_t  USBD_CUSTOM_HID_Init (void  *pdev,
                               uint8_t cfgidx)
{
  /* Open EP IN */
  DCD_EP_Open(pdev,
              HID_IN_EP,
              HID_IN_PACKET,
              USB_OTG_EP_INT);

  /* Open EP OUT */
  DCD_EP_Open(pdev,
              HID_OUT_EP,
              HID_OUT_PACKET,
              USB_OTG_EP_INT);

  /*Receive Data*/
  DCD_EP_PrepareRx(pdev,HID_OUT_EP, USB_HID_RcvBuf,64);

  return USBD_OK;
}

/**
  * @brief  USBD_HID_Init
  *         DeInitialize the HID layer
  * @param  pdev: device instance
  * @param  cfgidx: Configuration index
  * @retval status
  */
uint8_t  USBD_CUSTOM_HID_DeInit (void  *pdev,
                                 uint8_t cfgidx)
{
  /* Close HID EPs */
  DCD_EP_Close (pdev , HID_IN_EP);
  DCD_EP_Close (pdev , HID_OUT_EP);


  return USBD_OK;
}

/**
  * @brief  USBD_HID_Setup
  *         Handle the HID specific requests
  * @param  pdev: instance
  * @param  req: usb requests
  * @retval status
  */
uint8_t  USBD_CUSTOM_HID_Setup (void  *pdev,
                                USB_SETUP_REQ *req)
{
  uint8_t USBD_HID_Report_LENGTH=0;
  uint16_t len = 0;
  uint8_t  *pbuf = NULL;

  switch (req->bmRequest & USB_REQ_TYPE_MASK)
  {
  case USB_REQ_TYPE_CLASS :  
    switch (req->bRequest)
    {
    case CUSTOM_HID_REQ_SET_PROTOCOL:
      USBD_HID_Protocol = (uint8_t)(req->wValue);
      break;

    case CUSTOM_HID_REQ_GET_PROTOCOL:
      USBD_CtlSendData (pdev,
                        (uint8_t *)&USBD_HID_Protocol,
                        1);   
      break;

    case CUSTOM_HID_REQ_SET_IDLE:
      USBD_HID_IdleState = (uint8_t)(req->wValue >> 8);
      break;

    case CUSTOM_HID_REQ_GET_IDLE:
      USBD_CtlSendData (pdev,
                        (uint8_t *)&USBD_HID_IdleState,
                        1);        
      break;

    case CUSTOM_HID_REQ_SET_REPORT:
      IsReportAvailable = 1;
      USBD_HID_Report_ID = (uint8_t)(req->wValue);
      USBD_HID_Report_LENGTH = (uint8_t)(req->wLength);
      USBD_CtlPrepareRx (pdev, USB_HID_RcvBuf, USBD_HID_Report_LENGTH);

      break;      

    default:
      USBD_CtlError (pdev, req);
      return USBD_FAIL;
    }
    break;

  case USB_REQ_TYPE_STANDARD:
    switch (req->bRequest)
    {
    case USB_REQ_GET_DESCRIPTOR:
      if( req->wValue >> 8 == CUSTOM_HID_REPORT_DESC)
      {
        len = MIN(USBD_CUSTOM_HID_REPORT_DESC_SIZE , req->wLength);
        pbuf = (uint8_t*)CustomHID_ReportDesc;
      }
      else if( req->wValue >> 8 == CUSTOM_HID_DESCRIPTOR_TYPE)
      {
        pbuf = (uint8_t*)USBD_CUSTOM_HID_CfgDesc + 0x12;
        len = MIN(USB_CUSTOM_HID_DESC_SIZ , req->wLength);
      }

      USBD_CtlSendData (pdev,
                        pbuf,
                        len);

      break;

    case USB_REQ_GET_INTERFACE :
      USBD_CtlSendData (pdev,
                        (uint8_t *)&USBD_HID_AltSet,
                        1);
      break;

    case USB_REQ_SET_INTERFACE :
      USBD_HID_AltSet = (uint8_t)(req->wValue);
      break;
    }
  }
  return USBD_OK;
}

/**
  * @brief  USBD_HID_SendReport
  *         Send HID Report
  * @param  pdev: device instance
  * @param  buff: pointer to report
  * @retval status
  */
uint8_t USBD_CUSTOM_HID_SendReport     (USB_OTG_CORE_HANDLE  *pdev,
                                 uint8_t *report,
                                 uint16_t len)
{
  if (pdev->dev.device_status == USB_OTG_CONFIGURED )
  {
    DCD_EP_Tx (pdev, HID_IN_EP, report, len);
  }
  return USBD_OK;
}

/**
  * @brief  USBD_HID_GetCfgDesc
  *         return configuration descriptor
  * @param  speed : current device speed
  * @param  length : pointer data length
  * @retval pointer to descriptor buffer
  */
static uint8_t  *USBD_CUSTOM_HID_GetCfgDesc (uint8_t speed, uint16_t *length)
{
  *length = sizeof (USBD_CUSTOM_HID_CfgDesc);
  return USBD_CUSTOM_HID_CfgDesc;
}

/**
  * @brief  USBD_HID_DataIn
  *         handle data IN Stage
  * @param  pdev: device instance
  * @param  epnum: endpoint index
  * @retval status
  */
uint8_t  USBD_CUSTOM_HID_DataIn (void  *pdev,
                              uint8_t epnum)
{

  /* Ensure that the FIFO is empty before a new transfer, this condition could
  be caused by  a new transfer before the end of the previous transfer */
  DCD_EP_Flush(pdev, HID_IN_EP);

  //if (epnum == 2) PrevXferDone = 1;

  return USBD_OK;
}

/**
  * @brief  USBD_HID_DataOut
  *         handle data IN Stage
  * @param  pdev: device instance
  * @param  epnum: endpoint index
  * @retval status
  */
uint8_t  USBD_CUSTOM_HID_DataOut (void  *pdev,
                                  uint8_t epnum)
{
  /*查看接收数据长度 */
  usbRcvCnt = USBD_GetRxCount(pdev, epnum);

  DCD_EP_PrepareRx(pdev,HID_OUT_EP, USB_HID_RcvBuf, 64);

  addData2RcvBuffer(USB_HID_RcvBuf, usbRcvCnt);

  return USBD_OK;
}

/**
  * @brief  USBD_HID_EP0_RxReady
  *         Handles control request data.
  * @param  pdev: device instance
  * @param  epnum: endpoint index
  * @retval status
  */

uint8_t USBD_CUSTOM_HID_EP0_RxReady(void *pdev)
{
  return USBD_OK;
}