https://blog.csdn.net/imxiangzi/article/details/80138986
/* USB Standard Device Descriptor */
__ALIGN_BEGIN uint8_t USBD_HS_DeviceDesc[USB_LEN_DEV_DESC] __ALIGN_END =
{
0x12, /*bLength */
USB_DESC_TYPE_DEVICE, /*bDescriptorType*/
#if (USBD_LPM_ENABLED == 1)
0x01, /*bcdUSB */ /* changed to USB version 2.01
in order to support LPM L1 suspend
resume test of USBCV3.0*/
#else
0x00, /* bcdUSB USB version 2.00*/
#endif
0x02,
0x00, /*bDeviceClass */
0x00, /*bDeviceSubClass*/
0x00, /*bDeviceProtocol*/
USB_MAX_EP0_SIZE, /*bMaxPacketSize 64*/
LOBYTE(USBD_VID), /*idVendor 0x0483*/
HIBYTE(USBD_VID), /*idVendor*/
LOBYTE(USBD_PID_HS), /*idVendor 0x5730*/
HIBYTE(USBD_PID_HS), /*idVendor*/
0x00, /*bcdDevice rel. 2.00*/
0x02,
USBD_IDX_MFC_STR, /*Index of manufacturer string STMicroelectronics*/
USBD_IDX_PRODUCT_STR, /*Index of product string STM32 Audio Class*/
USBD_IDX_SERIAL_STR, /*Index of serial number string 00000000001A*/
USBD_MAX_NUM_CONFIGURATION /*bNumConfigurations*/
} ;
/* USB AUDIO device Configuration Descriptor */
__ALIGN_BEGIN static uint8_t USBD_AUDIO_CfgDesc[USB_AUDIO_CONFIG_DESC_SIZ] __ALIGN_END =
{
//Configuration:wTotalLength = 0x00be,NumInterfaces = 0x03,
0x09, //Length
USB_DESC_TYPE_CONFIGURATION, //DescriptorType : ConfigDescriptor 0x02
LOBYTE(USB_AUDIO_CONFIG_DESC_SIZ), /* wTotalLength 0xE0bytes*/
HIBYTE(USB_AUDIO_CONFIG_DESC_SIZ),
0x04, //NumInterfaces:4
0x01, //ConfigurationValue
0x00, //Configuration String iConfiguration
0xC0, //Attributes:Bus Power 4..0: Reserved ...00000 4..0: Reserved ...00000 6: Self Powered .1...... Yes 6: Self Powered .1...... Yes
0x32, //MaxPower = 0x32*2ma 100mA
/* 9Bytes */
//standard interface AC descriptor(Interface 0, Alternate Setting 0):
//bNumEndpoints = 0x00,bInterFaceClass = 0x01(audio),bInterfaceSubClass = 0x01(audio ctl),
AUDIO_INTERFACE_DESC_SIZE, //Length 09
USB_DESC_TYPE_INTERFACE, //4 DescriptorType:Inerface 04
0x00, //InterfaceNum:0
0x00, //AlternateSetting:0
0x00, //NumEndpoint:0
USB_DEVICE_CLASS_AUDIO, //InterfaceClass:audio 0x01 audio
AUDIO_SUBCLASS_AUDIOCONTROL, //InterfaceSubClass:audio ctl 0x01 audio control
AUDIO_PROTOCOL_UNDEFINED, //InterfaceProtocol 0x00
0x00, //Interface String inlterface
/* 9Bytes */
//class-specific AC interface descriptor,audio interface(0x24),audio control header(0x01),
//Total Length 0x0048,Number of streaming interface 2,interfaceNr 2,1
//Audio Control Interface Header Descriptor
0x0a, //Length
AUDIO_INTERFACE_DESCRIPTOR_TYPE,//DescriptorType:audio interface descriptor 0x24
AUDIO_CONTROL_HEADER, //DescriptorSubType:audio control header 0x01
0x00,0x01, //bcdADC:audio Device Class v1.00
0x46,0x00, //TotalLength:0x0046
0x02, //InCollection:2 AudioStreaming interface
0x02, //InterfaceNr(2) - AS #1 id AudioStreaming interface 2 belongs to this AudioControl interface
0x01, //InterfaceNr(1) - AS #2 id AudioStreaming interface 1 belongs to this AudioControl interface
/* 10Bytes */
//USB Microphone IT:audio interface descriptor,audio control input terminal(0x02),terminal id 0x01,
//Microphone(0x0201),Input Terminal(0x02),2 channel:Left Front,Right Front
// Audio Control Input Terminal Descriptor
AUDIO_INPUT_TERMINAL_DESC_SIZE, //Length 0x0c
AUDIO_INTERFACE_DESCRIPTOR_TYPE, //DescriptorType:audio interface descriptor 0x24
AUDIO_CONTROL_INPUT_TERMINAL, //DescriptorSubType:Input Terminal 0x02
0x01, //TerminalID:0x01
0x01,0x02, //TerminalType:USB Microphone
0x00, //AssocTerminal
0x02,/////////////// //NrChannels:2 channel
0x00,0x00, //ChannelConfig:Left Front,Right Front,
0x00, //ChannelName String
0x00, //Terminal String
/* 12Bytes */
//Audio Feature Unit Descriptor:audio interface descriptor,feature_unit(0x06),terminal id 0x02,
//SourceId 0x01,ControlSize 0x01,Mute,Volume,
//Audio Control Feature Unit Descriptor
0x09, //Length 0x09
AUDIO_INTERFACE_DESCRIPTOR_TYPE, //DescriptorType:audio interface descriptor 0x24
AUDIO_CONTROL_FEATURE_UNIT, //DescriptorSubType:Audio Feature Unit 0x06
AUDIO_OUT_STREAMING_CTRL, //UnitID:0x02
0x01, //SourceID:1 #Microphone IT
0x01, //ControlSize:1 byte
0x01, //Controls:Mute
0x00, //Controls(0):Volume
// 0x02, //Controls(1):Volume
0x00, //Feature String
/* 10Bytes */
//USB Streaming OT:audio interface descriptor,audio control output terminal(0x03),terminal id 0x03,
//USB Streaming(0x0101),Output Terminal(0x03),SourceId 0x02,
//Audio Control Output Terminal Descriptor
0x09, //Length 0x09
AUDIO_INTERFACE_DESCRIPTOR_TYPE, //DescriptorType:audio interface descriptor 0x24
AUDIO_CONTROL_OUTPUT_TERMINAL, //DescriptorSubTYpe:Output Terminal 0x03
0x03, //TerminalID:0x03
0x01,0x01, //TerminalType:USB Streaming
0x00, //AssocTerminal:ID 0
0x02, //SourceID:2 #Feature UNIT
0x00, //Terminal String
/* 9Bytes */
//USB Streaming IT:audio interface descriptor,audio control input terminal(0x02),terminal id 0x04,
//USB Streaming(0x0101),Input Terminal(0x02),2 channel:Left Front,Right Front
//Audio Control Input Terminal Descriptor
0x0c, //Length 0x0c
0x24, //DescriptorType:audio interface descriptor
0x02, //DescriptorSubType:Input Terminal
0x04, //TerminalID:0x04
0x01,0x01, //TerminalType:USB Streaming
0x00, //AssocTerminal
0x02, //NrChannels:2 channel
0x00,0x00, //ChannelConfig:Left Front,Right Front,
0x00, //ChannelName String
0x00, //Terminal String
/*12Bytes */
//Audio Feature Unit Descriptor:audio interface descriptor,feature_unit(0x06),terminal id 0x05,
//SourceId 0x04,ControlSize 0x01,Mute,Volume,
//Audio Control Feature Unit Descriptor
0x09, //Length 0x09
0x24, //DescriptorType:audio interface descriptor
0x06, //DescriptorSubType:Audio Feature Unit
0x05, //UnitID:0x05
0x04, //SourceID:4 #USB Streaming IT
0x01, //ControlSize:1 byte
0x01, //Controls:Mute,
0x00, //Controls(0):Volume
// 0x02, //Controls(1):Volume
0x00, //Feature String
/* 10Bytes */
//USB Speaker OT:audio interface descriptor,audio control output terminal(0x03),terminal id 0x06,
//USB Speaker(0x0301),Output Terminal(0x03),SourceId 0x05,
//Audio Control Output Terminal Descriptor
0x09, //Length 0x09
AUDIO_INTERFACE_DESCRIPTOR_TYPE, //DescriptorType:audio interface descriptor 0x24
AUDIO_CONTROL_OUTPUT_TERMINAL, //DescriptorSubTYpe:Output Terminal 0x03
0x06, //TerminalID:0x06
0x01,0x03, //TerminalType:Speaker
0x00, //AssocTerminal:
0x05, //SourceID:5 #Feature UNIT
0x00, //Terminal String
/* 9Bytes */
//-------------------Microphone interface---------------------//
//standard interface AS descriptor(Interface 1, Alternate Setting 0):
//bNumEndpoints = 0x00,bInterFaceClass = 0x01(audio),bInterfaceSubClass = 0x02(audio stream),
//Interface Descriptor 1/0 Audio, 0 Endpoints
AUDIO_INTERFACE_DESC_SIZE, //Length 0x09
USB_DESC_TYPE_INTERFACE, //DescriptorType:Interface 4
0x01, //InterfaceNum:1
0x00, //AlternateSetting:0
0x00, //NumEndpoint:0
USB_DEVICE_CLASS_AUDIO, //InterfaceClass:audio 0x01
AUDIO_SUBCLASS_AUDIOSTREAMING, //InterfaceSubClass:audio streaming 0x02
AUDIO_PROTOCOL_UNDEFINED, //InterfaceProtocol 0x00
0x00, //Interface String
/* 9Bytes */
//standard interface AS descriptor(Interface 1, Alternate Setting 1):
//bNumEndpoints = 0x01,bInterFaceClass = 0x01(audio),bInterfaceSubClass = 0x02(audio stream),
//Interface Descriptor 1/1 Audio, 1 Endpoint
AUDIO_INTERFACE_DESC_SIZE, //Length 0x09
USB_DESC_TYPE_INTERFACE, //DescriptorType:Interface 4
0x01, //InterfaceNum:1
0x01, //AlternateSetting:1
0x01, //NumEndpoint:1
USB_DEVICE_CLASS_AUDIO, //InterfaceClass:audio 0x01
AUDIO_SUBCLASS_AUDIOSTREAMING, //InterfaceSubClass:audio streaming 0x02
AUDIO_PROTOCOL_UNDEFINED, //InterfaceProtocol 0x00
0x00, //Interface String
/* 9Bytes */
//Audio Streaming Interface Descriptor:AS_GENERAL(0x01),
//TerminalLink 0x03,PCM(0x0001)
//Audio Streaming Interface Descriptor
AUDIO_STREAMING_INTERFACE_DESC_SIZE, //Length 0x07
AUDIO_INTERFACE_DESCRIPTOR_TYPE, //DescriptorType:audio interface descriptor 0x24
AUDIO_STREAMING_GENERAL, //DescriptorSubType:AS_GENERAL 0x01
0x03, //TerminalLink:#3USB USB Streaming OT
0x00, //Delay:0
0x01,0x00, //FormatTag:PCM
/* 7Bytes */
//Type 1 Format type descriptor:FORMAT_TYPE(0x02),FORMAT_TYPE_I(0x01),
//physical channels 0x02,two byte per audio subframe(0x02),16bit,
//Audio Streaming Format Type Descriptor
0x0b, //Length 0x0b
AUDIO_INTERFACE_DESCRIPTOR_TYPE, //DescriptorType:audio interface descriptor 0x24
AUDIO_STREAMING_FORMAT_TYPE, //DescriptorSubType:Format_type 0x02
AUDIO_FORMAT_TYPE_I, //FormatType:Format type1 0x01
0x02, //NumberOfChanne:2
0x02, //SubframeSize:2byte
0x10, //BitsResolution:16bit
0x01, //SampleFreqType:One sampling frequency.
AUDIO_SAMPLE_FREQ(USBD_AUDIO_FREQ), //32K(0x007d00)
/* 11Bytes */
//Endpoint 1 - Standard Descriptor:Input Endpoint1
//Isochronous,Synchronization Type(Asynchronous),MaxPacketSize 0x0084,
//Endpoint Descriptor 82 2 In, Isochronous, 1 ms
0x09, //Length 0x09
USB_DESC_TYPE_ENDPOINT, //DescriptorType:endpoint descriptor 0x05 Endpoint
AUDIO_IN_EP, //EndpointAddress:Input endpoint 2 0x82 2In
0x0D, //Attributes:0x0D, 1..0: Transfer Type ......01 Isochronous 3..2: Sync Type ....11.. Synchronous 5..4: Usage Type ..00.... Data 7..6: Reserved 00......
AUDIO_PACKET_SZE(USBD_AUDIO_FREQ), //0, 192 bytes wMaxPacketSize USBD_AUDIO_FREQ 48000
0x01, //Interval 1 ms
0x00, /* bRefresh */
0x00, /* bSynchAddress */
// /* 09 byte*/
/* 7Bytes */
//Endpoint - Audio Streaming Descriptor:
//Audio Endpoint descriptor,General,
//Audio Streaming Isochronous Audio Data Endpoint Descriptor (There is no parsing)
AUDIO_STREAMING_ENDPOINT_DESC_SIZE, //Length 0x07
AUDIO_ENDPOINT_DESCRIPTOR_TYPE, //DescriptorType:audio endpoint descriptor 0x25
AUDIO_ENDPOINT_GENERAL, //DescriptorSubType:audio endpiont general 0x01
0x00, //Attributes:0x00........
0x00, //LockDelayUnits
0x00,0x00, //LockDelay
/* 7Bytes */
//-------------------Speaker interface---------------------//
//standard interface AS descriptor(Interface 2, Alternate Setting 0):
//bNumEndpoints = 0x00,bInterFaceClass = 0x01(audio),bInterfaceSubClass = 0x02(audio stream),
//Interface Descriptor 2/0 Audio, 0 Endpoints
AUDIO_INTERFACE_DESC_SIZE, //Length 0x09
USB_DESC_TYPE_INTERFACE, //DescriptorType:Interface 0x04
0x02, //InterfaceNum:2
0x00, //AlternateSetting:0
0x00, //NumEndpoint:0
USB_DEVICE_CLASS_AUDIO, //InterfaceClass:audio 0x01
AUDIO_SUBCLASS_AUDIOSTREAMING, //InterfaceSubClass:audio streaming 0x02
AUDIO_PROTOCOL_UNDEFINED, //InterfaceProtocol 0x00
0x00, //Interface String
/* 9Bytes */
//standard interface AS descriptor(Interface 2, Alternate Setting 1):
//bNumEndpoints = 0x01,bInterFaceClass = 0x01(audio),bInterfaceSubClass = 0x02(audio stream),
//Interface Descriptor 2/1 Audio, 1 Endpoint
AUDIO_INTERFACE_DESC_SIZE, //Length 0x09
USB_DESC_TYPE_INTERFACE, //DescriptorType:Interface 4
0x02, //InterfaceNum:2
0x01, //AlternateSetting:1
0x01, //NumEndpoint:1
USB_DEVICE_CLASS_AUDIO, //InterfaceClass:audio 0x01
AUDIO_SUBCLASS_AUDIOSTREAMING, //InterfaceSubClass:audio streaming 0x02
AUDIO_PROTOCOL_UNDEFINED, //InterfaceProtocol 0x00
0x00, //Interface String
/* 9Bytes */
//Audio Streaming Interface Descriptor:AS_GENERAL(0x01),
//TerminalLink 0x04,PCM(0x0001)
//Audio Streaming Interface Descriptor
AUDIO_STREAMING_INTERFACE_DESC_SIZE, //Length 0x07
AUDIO_INTERFACE_DESCRIPTOR_TYPE, //DescriptorType:audio interface descriptor 0x24
AUDIO_STREAMING_GENERAL, //DescriptorSubType:AS_GENERAL 0x01
0x04, //TerminalLink:#4 USB Streaming IT
0x00, //Delay:0
0x01,0x00, //FormatTag:PCM
/* 7Bytes */
//Type 1 Format type descriptor:FORMAT_TYPE(0x02),FORMAT_TYPE_I(0x01),
//physical channels 0x02,two byte per audio subframe(0x02),16bit,
//32K(0x007d00)
//Audio Streaming Format Type Descriptor
0x0b, //Length 0x0b
AUDIO_INTERFACE_DESCRIPTOR_TYPE, //DescriptorType:audio interface descriptor
AUDIO_STREAMING_FORMAT_TYPE, //DescriptorSubType:Format_type
AUDIO_FORMAT_TYPE_I, //FormatType:Format type 1
0x02, //NumberOfChanne:2
0x02, //SubframeSize:2byte
0x10, //BitsResolution:16bit
0x01, //SampleFreqType:One sampling frequency.
AUDIO_SAMPLE_FREQ(USBD_AUDIO_FREQ), //
/* 11Bytes */
//Endpoint 2 - Standard Descriptor:Output Endpoint2
//Isochronous,Synchronization Type(Asynchronous),MaxPacketSize 0x0084,
//Endpoint Descriptor 01 1 Out, Isochronous, 1 ms
0x09, //Length 0x09
USB_DESC_TYPE_ENDPOINT, //DescriptorType:endpoint descriptor 0x05
AUDIO_OUT_EP, //EndpointAddress:Output endpoint 1 0x01
0x0D, //Attributes:0x0d,Isochronous,Synchronization Type(Asynchronous)......... 1..0: Transfer Type ......01 Isochronous 3..2: Sync Type ....11.. Synchronous 5..4: Usage Type ..00.... Data 7..6: Reserved 00......
AUDIO_PACKET_SZE(USBD_AUDIO_FREQ), //MaxPacketSize 192 bytes
0x01, //Interval 1ms
0x00, /* bRefresh */
0x00, /* bSynchAddress */
/* 09 byte*/
/* 7Bytes */
//Endpoint - Audio Streaming Descriptor:
//Audio Endpoint descriptor,General,
//Audio Streaming Isochronous Audio Data Endpoint Descriptor
AUDIO_STREAMING_ENDPOINT_DESC_SIZE, //Length 0x07
AUDIO_ENDPOINT_DESCRIPTOR_TYPE, //DescriptorType:audio endpoint descriptor 0x25
AUDIO_ENDPOINT_GENERAL, //DescriptorSubType:audio endpiont general 0x01
0x00, //Attributes:0x00.............
0x00, //LockDelayUnits
0x00,0x00, //LockDelay
/* 7Bytes */
/************** Descriptor of CUSTOM HID interface ****************/
//Interface Descriptor 3/0 HID, 2 Endpoints
/* 09 */
0x09, /*bLength: Interface Descriptor size 0x09*/
USB_DESC_TYPE_INTERFACE,/*bDescriptorType: Interface descriptor type 0x04*/
0x03, /*bInterfaceNumber: Number of Interface*/
0x00, /*bAlternateSetting: Alternate setting*/
0x02, /*bNumEndpoints*/
0x03, /*bInterfaceClass: CUSTOM_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 */
//HID Descriptor
0x09, /*bLength: CUSTOM_HID Descriptor size 0x09*/
CUSTOM_HID_DESCRIPTOR_TYPE, /*bDescriptorType: CUSTOM_HID 0x21*/
0x11, /*bCUSTOM_HIDUSTOM_HID: CUSTOM_HID Class Spec release number 1.11*/
0x01, //1.11
0x00, /*bCountryCode: Hardware target country*/
0x01, /*bNumDescriptors: Number of CUSTOM_HID class descriptors to follow*/
0x22, /*bDescriptorType Report*/
USBD_CUSTOM_HID_REPORT_DESC_SIZE,/*wItemLength: Total length of Report descriptor 33 bytes*/
0x00,
/******************** Descriptor of Custom HID endpoints ********************/
/* 27 */
//Endpoint Descriptor 83 3 In, Interrupt, 9 ms
0x07, /*bLength: Endpoint Descriptor size 0x07*/
USB_DESC_TYPE_ENDPOINT, /*bDescriptorType: 0x05*/
CUSTOM_HID_EPIN_ADDR, /*bEndpointAddress: Endpoint Address (IN) 0x83*/
0x03, /*bmAttributes: Interrupt endpoint 1..0: Transfer Type ......11 Interrupt 7..2: Reserved 000000.. */
CUSTOM_HID_EPIN_SIZE, /*wMaxPacketSize: Byte max 0x40*/
0x00, //64 bytes
0x09, /*bInterval: Polling Interval (9 ms)*/
/* 34 */
0x07, /* bLength: Endpoint Descriptor size 0x07*/
USB_DESC_TYPE_ENDPOINT, /* bDescriptorType: 0x05*/
CUSTOM_HID_EPOUT_ADDR, /*bEndpointAddress: Endpoint Address (OUT) 0x03*/
0x03, /* bmAttributes: Interrupt endpoint 1..0: Transfer Type ......11 Interrupt 7..2: Reserved 000000.. */
CUSTOM_HID_EPOUT_SIZE, /* wMaxPacketSize: 64 Bytes max 0x40*/
0x00,
0x09, /* bInterval: Polling Interval (9 ms) */
/* 41 */
} ;
from： https://blog.csdn.net/baiyibin0530/article/details/78678944