- const uint8_t Speaker_DeviceDescriptor[] =
- {
- SPEAKER_SIZ_DEVICE_DESC, /* bLength */
- USB_DEVICE_DESCRIPTOR_TYPE, /* bDescriptorType */
- 0x00, /* 2.00 */ /* bcdUSB */
- 0x02,
- 0x00, /* bDeviceClass */
- 0x00, /* bDeviceSubClass */
- 0x00, /* bDeviceProtocol */
- 0x40, /* bMaxPacketSize 40 */
- 0x83, /* idVendor */
- 0x04,
- 0x30, /* idProduct = 0x5730*/
- 0x5a,
- 0x00, /* 2.00 */ /* bcdDevice */
- 0x02,
- 1, /* iManufacturer */
- 2, /* iProduct */
- 3, /* iSerialNumber */
- 0x01 /* bNumConfigurations */
- };
- const uint8_t Speaker_ConfigDescriptor[] =
- {
- /* Configuration 1 */
- 0x09, /* bLength */
- USB_CONFIGURATION_DESCRIPTOR_TYPE, /* bDescriptorType */
- 0x6D, /* wTotalLength 110 bytes*/
- 0x00,
- 0x02, /* bNumInterfaces */
- 0x01, /* bConfigurationValue */
- 0x00, /* iConfiguration */
- 0xC0, /* bmAttributes Self Powered*/
- 0x32, /* bMaxPower = 100 mA*/
- /* 09 byte*/
- /* USB Speaker Standard interface descriptor */
- SPEAKER_SIZ_INTERFACE_DESC_SIZE, /* bLength */
- USB_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */
- 0x00, /* bInterfaceNumber */
- 0x00, /* bAlternateSetting */
- 0x00, /* bNumEndpoints */
- USB_DEVICE_CLASS_AUDIO, /* bInterfaceClass */
- AUDIO_SUBCLASS_AUDIOCONTROL, /* bInterfaceSubClass */
- AUDIO_PROTOCOL_UNDEFINED, /* bInterfaceProtocol */
- 0x00, /* iInterface */
- /* 09 byte*/
- /* USB Speaker Class-specific AC Interface Descriptor */
- SPEAKER_SIZ_INTERFACE_DESC_SIZE, /* bLength */
- AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */
- AUDIO_CONTROL_HEADER, /* bDescriptorSubtype */
- 0x00, /* 1.00 */ /* bcdADC */
- 0x01,
- 0x27, /* wTotalLength = 39*/
- 0x00,
- 0x01, /* bInCollection */
- 0x01, /* baInterfaceNr */
- /* 09 byte*/
- /* USB Speaker Input Terminal Descriptor */
- AUDIO_INPUT_TERMINAL_DESC_SIZE, /* bLength */
- AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */
- AUDIO_CONTROL_INPUT_TERMINAL, /* bDescriptorSubtype */
- 0x01, /* bTerminalID */
- 0x01, /* wTerminalType AUDIO_TERMINAL_USB_STREAMING 0x0101 */
- 0x02,
- 0x00, /* bAssocTerminal */
- 0x01, /* bNrChannels */
- 0x00, /* wChannelConfig 0x0000 Mono */
- 0x00,
- 0x00, /* iChannelNames */
- 0x00, /* iTerminal */
- /* 12 byte*/
- /* USB Speaker Audio Feature Unit Descriptor */
- 0x09, /* bLength */
- AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */
- AUDIO_CONTROL_FEATURE_UNIT, /* bDescriptorSubtype */
- 0x03, /* bUnitID */
- 0x01, /* bSourceID */
- 0x01, /* bControlSize */
- AUDIO_CONTROL_MUTE, /* bmaControls(0) */
- 0x00, /* bmaControls(1) */
- 0x00, /* iTerminal */
- /* 09 byte*/
- /*USB Speaker Output Terminal Descriptor */
- 0x09, /* bLength */
- AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */
- AUDIO_CONTROL_OUTPUT_TERMINAL, /* bDescriptorSubtype */
- 0x02, /* bTerminalID */
- 0x01, /* wTerminalType 0x0101*/
- 0x01,
- 0x00, /* bAssocTerminal */
- 0x01, /* bSourceID */
- 0x00, /* iTerminal */
- /* 09 byte*/
- /* USB Speaker Standard AS Interface Descriptor - Audio Streaming Zero Bandwidth */
- /* Interface 1, Alternate Setting 0 */
- SPEAKER_SIZ_INTERFACE_DESC_SIZE, /* bLength */
- USB_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */
- 0x01, /* bInterfaceNumber */
- 0x00, /* bAlternateSetting */
- 0x00, /* bNumEndpoints */
- USB_DEVICE_CLASS_AUDIO, /* bInterfaceClass */
- AUDIO_SUBCLASS_AUDIOSTREAMING, /* bInterfaceSubClass */
- AUDIO_PROTOCOL_UNDEFINED, /* bInterfaceProtocol */
- 0x00, /* iInterface */
- /* 09 byte*/
- /* USB Speaker Standard AS Interface Descriptor - Audio Streaming Operational */
- /* Interface 1, Alternate Setting 1 */
- SPEAKER_SIZ_INTERFACE_DESC_SIZE, /* bLength */
- USB_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */
- 0x01, /* bInterfaceNumber */
- 0x01, /* bAlternateSetting */
- 0x01, /* bNumEndpoints */
- USB_DEVICE_CLASS_AUDIO, /* bInterfaceClass */
- AUDIO_SUBCLASS_AUDIOSTREAMING, /* bInterfaceSubClass */
- AUDIO_PROTOCOL_UNDEFINED, /* bInterfaceProtocol */
- 0x00, /* iInterface */
- /* 09 byte*/
- /* USB Speaker Audio Streaming Interface Descriptor */
- AUDIO_STREAMING_INTERFACE_DESC_SIZE, /* bLength */
- AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */
- AUDIO_STREAMING_GENERAL, /* bDescriptorSubtype */
- 0x02, /* bTerminalLink */
- 0x01, /* bDelay */
- 0x02, /* wFormatTag AUDIO_FORMAT_PCM 0x0001*/
- 0x00,
- /* 07 byte*/
- /* USB Speaker Audio Type I Format Interface Descriptor */
- 0x0B, /* bLength */
- AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */
- AUDIO_STREAMING_FORMAT_TYPE, /* bDescriptorSubtype */
- AUDIO_FORMAT_TYPE_I, /* bFormatType */
- 0x01, /* bNrChannels */
- 0x02, /* bSubFrameSize */
- 16, /* bBitResolution */
- 0x01, /* bSamFreqType */
- 0xF0, /* tSamFreq 22000 = 0x55F0 */
- 0x55,
- 0x00,
- /* 11 byte*/
- /* Endpoint 1 - Standard Descriptor */
- AUDIO_STANDARD_ENDPOINT_DESC_SIZE, /* bLength */
- USB_ENDPOINT_DESCRIPTOR_TYPE, /* bDescriptorType */
- 0x81, /* bEndpointAddress 1 in endpoint*/
- USB_ENDPOINT_TYPE_ISOCHRONOUS, /* bmAttributes */
- 44, /* wMaxPacketSize 16 bytes*/
- 0x00,
- 0x01, /* bInterval */
- 0x00, /* bRefresh */
- 0x00, /* bSynchAddress */
- /* 09 byte*/
- /* Endpoint - Audio Streaming Descriptor*/
- AUDIO_STREAMING_ENDPOINT_DESC_SIZE, /* bLength */
- AUDIO_ENDPOINT_DESCRIPTOR_TYPE, /* bDescriptorType */
- AUDIO_ENDPOINT_GENERAL, /* bDescriptor */
- 0x00, /* bmAttributes */
- 0x00, /* bLockDelayUnits */
- 0x00, /* wLockDelay */
- 0x00,
- /* 07 byte*/
- };
注：这里对于特殊功能描述符可以参考USB官网的audio 10文档，下载路径为https://usb.org/document-library/audio-device-document-10，改文档包含了描述符和请求的格式，以及描述符的举例，很有参考价值；
因为本人是用ST的Speaker改写的，所以，如果把ST的Speaker的描述符替换之后，就能够在PC端的设备管理器看到USB的麦克风了；
这里只上传了usb_desc文件，本期学习笔记暂时就到这里，后面空下来会出后续的实现代码以及源码的上传；
楼主
