stm32F446 USB复合CDC及MSC

竹叶船提问时间：2018-11-28 09:14 /

问答
是否解决:

大家好！
我现在做USB复合设备，参照网上了代码完成了复合设备代码的修改。但是现在遇到一个问题，就是CDC和MSC设备同时只能识别出一个来。我在其它部分代码不变动的情况下如果将PID设置为：
#define USBD_PID_FS    22336
就可以识别出CDC设备；
设置为：
#define USBD_PID_FS    22314
就可以识别出MSC设备；

但是就是不能同时识别出CDC和MSC，麻烦各位指导一下；

下面是参考网上复合设备的描述
/* USB composite device Configuration Descriptor */
/* All Descriptors (Configuration, Interface, Endpoint, Class, Vendor */
__ALIGN_BEGIN uint8_t USBD_Composite_CfgFSDesc[]  __ALIGN_END =
#if 1
{
  0x09, /* bLength: Configuation Descriptor size */
  USB_DESC_TYPE_CONFIGURATION, /* bDescriptorType: Configuration */
  0x67,//WBVAL(USBD_COMPOSITE_DESC_SIZE),
  0x00,
  USBD_MAX_NUM_INTERFACES ,  /* bNumInterfaces: */
  0x01, /* bConfigurationValue: */
  0x04, /* iConfiguration: */
  0xC0, /* bmAttributes: */
  0x32, /* MaxPower 300 mA */

  /****************************CDC************************************/
  /* Interface Association Descriptor */
  USBD_IAD_DESC_SIZE,             // bLength
  USBD_IAD_DESCRIPTOR_TYPE,       // bDescriptorType
  USBD_CDC_FIRST_INTERFACE,       // bFirstInterface
  USBD_CDC_INTERFACE_NUM,          // bInterfaceCount
  0x02,                            // bFunctionClass
  0x02,                            // bFunctionSubClass
  0x01,                            // bInterfaceProtocol
  0x04,                            // iFunction

/*Interface Descriptor */
  0x09, /* bLength: Interface Descriptor size */
  USB_DESC_TYPE_INTERFACE,  /* bDescriptorType: Interface */
  /* Interface descriptor type */
  USBD_CDC_CMD_INTERFACE, /* bInterfaceNumber: Number of Interface */
  0x00, /* bAlternateSetting: Alternate setting */
  0x01, /* bNumEndpoints: One endpoints used */
  0x02, /* bInterfaceClass: Communication Interface Class */
  0x02, /* bInterfaceSubClass: Abstract Control Model */
  0x01, /* bInterfaceProtocol: Common AT commands */
  0x01, /* 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: 1 */

  /*ACM Functional Descriptor*/
  0x04, /* bFunctionLength */
  0x24, /* bDescriptorType: CS_INTERFACE */
  0x02, /* bDescriptorSubtype: Abstract Control Management desc */
  0x02, /* bmCapabilities */

  /*Union Functional Descriptor*/
  0x05, /* bFunctionLength */
  0x24, /* bDescriptorType: CS_INTERFACE */
  0x06, /* bDescriptorSubtype: Union func desc */
  USBD_CDC_CMD_INTERFACE, /* bMasterInterface: Communication class interface */
  USBD_CDC_DATA_INTERFACE, /* bSlaveInterface0: Data Class Interface */

  /*Endpoint 2 Descriptor*/
  0x07,                         /* bLength: Endpoint Descriptor size */
  USB_DESC_TYPE_ENDPOINT, /* bDescriptorType: Endpoint */
  CDC_CMD_EP,                   /* bEndpointAddress */
  0x03,                         /* bmAttributes: Interrupt */
  LOBYTE(CDC_CMD_PACKET_SIZE),    /* wMaxPacketSize: */
  HIBYTE(CDC_CMD_PACKET_SIZE),
  0x10,                         /* bInterval: */
  /*---------------------------------------------------------------------------*/

  /*Data class interface descriptor*/
  0x09, /* bLength: Endpoint Descriptor size */
  USB_DESC_TYPE_INTERFACE,  /* bDescriptorType: */
  USBD_CDC_DATA_INTERFACE, /* bInterfaceNumber: Number of Interface */
  0x00, /* bAlternateSetting: Alternate setting */
  0x02, /* bNumEndpoints: Two endpoints used */
  0x0A, /* bInterfaceClass: CDC */
  0x02, /* bInterfaceSubClass: */
  0x00, /* bInterfaceProtocol: */
  0x01, /* iInterface: */

  /*Endpoint OUT Descriptor*/
  0x07, /* bLength: Endpoint Descriptor size */
  USB_DESC_TYPE_ENDPOINT,    /* bDescriptorType: Endpoint */
  CDC_OUT_EP,                      /* bEndpointAddress */
  0x02,                            /* bmAttributes: Bulk */
  LOBYTE(CDC_DATA_FS_MAX_PACKET_SIZE),  /* wMaxPacketSize: */
  HIBYTE(CDC_DATA_FS_MAX_PACKET_SIZE),
  0x00,                            /* bInterval: ignore for Bulk transfer */

  /*Endpoint IN Descriptor*/
  0x07, /* bLength: Endpoint Descriptor size */
  USB_DESC_TYPE_ENDPOINT,    /* bDescriptorType: Endpoint */
  CDC_IN_EP,                      /* bEndpointAddress */
  0x02,                            /* bmAttributes: Bulk */
  LOBYTE(CDC_DATA_FS_MAX_PACKET_SIZE),  /* wMaxPacketSize: */
  HIBYTE(CDC_DATA_FS_MAX_PACKET_SIZE),
  0x01,                            /* bInterval: ignore for Bulk transfer */

/****************************MSC************************************/
  /* Interface Association Descriptor */
  USBD_IAD_DESC_SIZE,                      // bLength
  USBD_IAD_DESCRIPTOR_TYPE,                // bDescriptorType
  USBD_MSC_FIRST_INTERFACE,                // bFirstInterface
  USBD_MSC_INTERFACE_NUM,                   // bInterfaceCount
  0x08,                                     // bFunctionClass
  0x06,                                     // bFunctionSubClass
  0x50,                                     // bInterfaceProtocol
  0x05,

  /********************  Mass Storage interface ********************/
  0x09, /* bLength: Interface Descriptor size */
  USB_DESC_TYPE_INTERFACE, /* bDescriptorType: */
  USBD_MSC_INTERFACE, /* bInterfaceNumber: Number of Interface */
  0x00, /* bAlternateSetting: Alternate setting */
  0x02, /* bNumEndpoints*/
  0x08, /* bInterfaceClass: MSC Class */
  0x06, /* bInterfaceSubClass : SCSI transparent*/
  0x50, /* nInterfaceProtocol */
  0x05,       /* iInterface: */
  /********************  Mass Storage Endpoints ********************/
  0x07, /*Endpoint descriptor length = 7*/
  0x05, /*Endpoint descriptor type */
  MSC_EPIN_ADDR, /*Endpoint address (IN, address 1) */
  0x02, /*Bulk endpoint type */
  LOBYTE(MSC_MAX_FS_PACKET),
  HIBYTE(MSC_MAX_FS_PACKET),
  0x01, /*Polling interval in milliseconds */

  0x07, /*Endpoint descriptor length = 7 */
  0x05, /*Endpoint descriptor type */
  MSC_EPOUT_ADDR, /*Endpoint address (OUT, address 1) */
  0x02, /*Bulk endpoint type */
  LOBYTE(MSC_MAX_FS_PACKET),
  HIBYTE(MSC_MAX_FS_PACKET),
  0x01,    /*Polling interval in milliseconds*/
};