在STM32 USB HID工程上修改为USB MIDI方法

在原是STM32F103 USB HID的工程基础上改为USB MIDI设备

主要内容修改配置描述符 USBD_CUSTOM_HID_CfgDesc，

注意MIDI属于音频类，需要配置为Audio类，并且需要添加控制端点。

__ALIGN_BEGIN static uint8_t USBD_CUSTOM_HID_CfgDesc[USB_CUSTOM_HID_CONFIG_DESC_SIZ] __ALIGN_END =

{

0x09, /* bLength: Configuration Descriptor size */

USB_DESC_TYPE_CONFIGURATION, /* bDescriptorType: Configuration */

USB_CUSTOM_HID_CONFIG_DESC_SIZ,

/* wTotalLength: Bytes returned */

0x00,

0x02,//1 /*bNumInterfaces: 2 interface*/

0x01, /*bConfigurationValue: Configuration value*/

0x00, /*iConfiguration: Index of string descriptor describing

the configuration*/

0xC0, /*bmAttributes: bus powered */

0x32, /*MaxPower 100 mA: this current is used for detecting Vbus*/

/******************* Standard AC Interface Descriptor *********************/

/* 09 */

0x09, /*bLength: Interface Descriptor size*/

USB_DESC_TYPE_INTERFACE, /*bDescriptorType: Interface descriptor type*/

0x00, /*bInterfaceNumber: Number of Interface*/

0x00, /*bAlternateSetting: Alternate setting*/

0x00, /*bNumEndpoints*/

0x01, /*bInterfaceClass: Audio*/

0x01, /*bInterfaceSubClass : Audio Control*/

0, /*nInterfaceProtocol*/

0, /*iInterface: Index of string descriptor*/

/**************** Class-specific AC Interface Descriptor ******************/

/* 18 */

0x09, /*bLength: Interface Descriptor size*/

0x24, /*bDescriptorType: Class-specific interface descriptor type*/

0x01, /*bDescriptorSubType: Header*/

0x00, /*bcdADC: Revision of class specification - 1.0*/

0x01,

0x09, /*wTotalLength: Total size of class specific discriptor*/

0x00,

0x01, /*bInCollection: Number of streaming interfaces*/

0x01, /*baInterfaceNr : MIDIStreaming interface 1 belongs to

this AudioControl interface*/

/******************* Standard MS Interface Descriptor *********************/

/* 27 */

0x09, /*bLength: Interface Descriptor size*/

USB_DESC_TYPE_INTERFACE, /*bDescriptorType: Interface descriptor type*/

0x01, /*bInterfaceNumber: Number of Interface*/

0x00, /*bAlternateSetting: Alternate setting*/

0x02, /*bNumEndpoints*/

0x01, /*bInterfaceClass: Audio*/

0x03, /*bInterfaceSubClass : MIDI Streaming*/

0, /*nInterfaceProtocol*/

0, /*iInterface: Index of string descriptor*/

/**************** Class-specific MS Interface Descriptor ******************/

/* 36 */

0x07, /*bLength: Interface Descriptor size*/

0x24, /*bDescriptorType: Class-specific interface descriptor type*/

0x01, /*bDescriptorSubType: MS Header*/

0x00, /*bcdADC: Revision of class specification*/

0x01,

0x41, /*wTotalLength: Total size of class specific discriptor*/

0x00,

/******************* MIDI IN Jack Descriptor (Embedded) *******************/

/* 43 */

0x06, /*bLength: Size of this descriptor*/

0x24, /*bDescriptorType: Class-specific interface descriptor type*/

0x02, /*bDescriptorSubType: MIDI IN Jack*/

0x01, /*bJackType: Embedded*/

0x01, /*bJackID: ID of this Jack*/

0x00, /*iJack*/

/******************* MIDI IN Jack Descriptor (External) *******************/

/* 49 */

0x06, /*bLength: Size of this descriptor*/

0x24, /*bDescriptorType: Class-specific interface descriptor type*/

0x02, /*bDescriptorSubType: MIDI IN Jack*/

0x02, /*bJackType: External*/

0x02, /*bJackID: ID of this Jack*/

0x00, /*iJack*/

/******************* MIDI OUT Jack Descriptor (Embedded) ******************/

/* 55 */

0x09, /*bLength: Size of this descriptor*/

0x24, /*bDescriptorType: Class-specific interface descriptor type*/

0x03, /*bDescriptorSubType: MIDI OUT Jack*/

0x01, /*bJackType: Embedded*/

0x03, /*bJackID: ID of this Jack*/

0x01, /*bNrInputPins: Number of Input Pins of this Jack*/

0x02, /*BaSourceID: ID of the Entry to which this Pin is connected*/

0x01, /*BaSourceID: Output Pin number of the Entry to

which this Input Pin is connected*/

0x00, /*iJack*/

/******************* MIDI OUT Jack Descriptor (External) ******************/

/* 64 */

0x09, /*bLength: Size of this descriptor*/

0x24, /*bDescriptorType: Class-specific interface descriptor type*/

0x03, /*bDescriptorSubType: MIDI OUT Jack*/

0x02, /*bJackType: External*/

0x04, /*bJackID: ID of this Jack*/

0x01, /*bNrInputPins: Number of Input Pins of this Jack*/

0x01, /*BaSourceID: ID of the Entry to which this Pin is connected*/

0x01, /*BaSourceID: Output Pin number of the Entry to

which this Input Pin is connected*/

0x00, /*iJack*/

/****************** Standard Bulk OUT Endpoint Descriptor *****************/

/* 73 */

0x09, /*bLength: Size of this descriptor*/

USB_DESC_TYPE_ENDPOINT, /*bDescriptorType: Endpoint descriptor type*/

0x01, /*bEndpointAddress: OUT Endpoint 1*/

0x02, /*bmAttributes: Bulk, not shared.*/

0x40, /*wMaxPacketSize 64*/

0x00,

0x00, /*bInterval*/

0x00, /*bRefresh*/

0x00, /*bSynchAddress*/

/************* Class-specific MS Bulk OUT Endpoint Descriptor *************/

/* 82 */

0x05, /*bLength: Size of this descriptor*/

0x25, /*bDescriptorType: Class-specific endpoint descriptor type*/

0x01, /*bDescriptorSubType: MS General*/

0x01, /*bNumEmbMIDIJack: Number of embedded MIDI IN Jack*/

0x01, /*BaAssocJackID: ID of the Embedded MIDI IN Jack*/

/****************** Standard Bulk IN Endpoint Descriptor *****************/

/* 87 */

0x09, /*bLength: Size of this descriptor*/

USB_DESC_TYPE_ENDPOINT, /*bDescriptorType: Endpoint descriptor type*/

0x81, /*bEndpointAddress: IN Endpoint 1*/

0x02, /*bmAttributes: Bulk, not shared.*/

0x40, /*wMaxPacketSize 64*/

0x00,

0x00, /*bInterval*/

0x00, /*bRefresh*/

0x00, /*bSynchAddress*/

/************* Class-specific MS Bulk OUT Endpoint Descriptor *************/

/* 96 */

0x05, /*bLength: Size of this descriptor*/

0x25, /*bDescriptorType: Class-specific endpoint descriptor type*/

0x01, /*bDescriptorSubType: MS General*/

0x01, /*bNumEmbMIDIJack: Number of embedded MIDI OUT Jack*/

0x03, /*BaAssocJackID: ID of the Embedded MIDI OUT Jack*/

/* 101 */

} ;

修改配置描述符长度