在cub生成的audio上hid称为混合设备（composite）

库文件的修改：

usbd_audio.h
#define AUDIO_IN_EP      0x82   
#define USB_AUDIO_CONFIG_DESC_SIZ    (0xC0+32)//109
#define AUDIO_OUT_PACKET_NUM          2//80

usbd_audio.c
#include "usbd_hid.h"
uint8_t HID_OEP4_RX[64] = {0};
static uint8_t  USBD_AUDIO_HID_Setup (USBD_HandleTypeDef *pdev, USBD_SetupReqTypedef *req);
USBD_AUDIO_HID_Setup,//USBD_AUDIO_Setup,
0x04,                /* bNumInterfaces */


static uint8_t  USBD_AUDIO_Init (USBD_HandleTypeDef *pdev,
                               uint8_t cfgidx)

   USBD_LL_PrepareReceive(pdev,
                           AUDIO_OUT_EP,
                           haudio->buffer,                        
                           AUDIO_OUT_PACKET);     

        /*Prepare Out endpoint to receive 1st packet*/        
    USBD_LL_PrepareReceive(pdev,
                           CUSTOM_HID_EPOUT_ADDR,
                           HID_OEP4_RX,                        
                           CUSTOM_HID_EPOUT_SIZE);      


static uint8_t  USBD_AUDIO_DeInit (USBD_HandleTypeDef *pdev,
                                 uint8_t cfgidx)

static uint8_t  USBD_AUDIO_HID_Setup (USBD_HandleTypeDef *pdev,
                                USBD_SetupReqTypedef *req)

usbd_hid.c

__ALIGN_BEGIN static uint8_t HID_MOUSE_ReportDesc[HID_MOUSE_REPORT_DESC_SIZE]  __ALIGN_END =


__ALIGN_BEGIN static uint8_t HID_MOUSE_ReportDesc[HID_MOUSE_REPORT_DESC_SIZE]  __ALIGN_END =
{
//  0x05,   0x01,
//  0x09,   0x02,
//  0xA1,   0x01,
//  0x09,   0x01,
//  
//  0xA1,   0x00,
//  0x05,   0x09,
//  0x19,   0x01,
//  0x29,   0x03,
//  
//  0x15,   0x00,
//  0x25,   0x01,
//  0x95,   0x03,
//  0x75,   0x01,
//  
//  0x81,   0x02,
//  0x95,   0x01,
//  0x75,   0x05,
//  0x81,   0x01,
//  
//  0x05,   0x01,
//  0x09,   0x30,
//  0x09,   0x31,
//  0x09,   0x38,
//  
//  0x15,   0x81,
//  0x25,   0x7F,
//  0x75,   0x08,
//  0x95,   0x03,
//  
//  0x81,   0x06,
//  0xC0,   0x09,
//  0x3c,   0x05,
//  0xff,   0x09,
//  
//  0x01,   0x15,
//  0x00,   0x25,
//  0x01,   0x75,
//  0x01,   0x95,
//  
//  0x02,   0xb1,
//  0x22,   0x75,
//  0x06,   0x95,
//  0x01,   0xb1,
//  
//  0x01,   0xc0
  /* USER CODE BEGIN 0 */
        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)
  /* USER CODE END 0 */
  0xC0    /*     END_COLLECTION                 */

};

usbd_conf.h usbd_conf.c
//  HAL_PCDEx_SetRxFiFo(&hpcd_USB_OTG_HS, 0x200);
//  HAL_PCDEx_SetTxFiFo(&hpcd_USB_OTG_HS, 0, 0x80);
//  HAL_PCDEx_SetTxFiFo(&hpcd_USB_OTG_HS, 1, 0x174);
    HAL_PCDEx_SetRxFiFo(&hpcd_USB_OTG_HS, 0x160);            //all out  endpoints
  HAL_PCDEx_SetTxFiFo(&hpcd_USB_OTG_HS, 0, 0x60);        //control  endpoint
  HAL_PCDEx_SetTxFiFo(&hpcd_USB_OTG_HS, 2, 0x160);    //audio in endpoint
  HAL_PCDEx_SetTxFiFo(&hpcd_USB_OTG_HS, 3, 0xA0);     //hid in   endpoint

#define USBD_MAX_NUM_INTERFACES     4

#define USBD_CUSTOMHID_OUTREPORT_BUF_SIZE     2
/*---------- -----------*/
#define USBD_CUSTOM_HID_REPORT_DESC_SIZE     33