'STM32 USB audio device - headset - can`t init second interface
Currently I`m trying to create some kind of USB headset on STM32F407 - device, that able to play audio stream from host and send audio samples, received from mic.
USB Audio device topology looks like this(sorry for bad quality): topology
I`m using two endpoints here. As a result I describe two interface in USB descriptor.
Descriptors looks like this:
static uint8_t usbd_audio_CfgDesc[AUDIO_CONFIG_DESC_SIZE] =
{
/* Configuration 1 */
0x09, /* bLength */
USB_CONFIGURATION_DESCRIPTOR_TYPE, /* bDescriptorType */
LOBYTE(AUDIO_CONFIG_DESC_SIZE), /* wTotalLength 183 bytes*/
HIBYTE(AUDIO_CONFIG_DESC_SIZE),
0x03, /* bNumInterfaces */
0x01, /* bConfigurationValue */
0x00, /* iConfiguration */
0xC0, /* bmAttributes BUS Powred*/
0x32, /* bMaxPower = 100 mA*/
/* 09 byte*/
/* USB Headset Standard interface descriptor */
AUDIO_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 Headset Class-specific AC Interface Descriptor */
0x0A, /* bLength */
AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */
AUDIO_CONTROL_HEADER, /* bDescriptorSubtype */
0x00, /* 1.00 */ /* bcdADC */
0x01,
0x3C, /* wTotalLength = 60*/
0x00,
0x02, /* bInCollection */
0x01, /* baInterfaceNr(1) - OUT */
0x02, /* baInterfaceNr(2) - IN */
/* 10 byte*/
/* USB Microphone Input Terminal Descriptor */
AUDIO_INPUT_TERMINAL_DESC_SIZE, /* bLength */
AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */
AUDIO_CONTROL_INPUT_TERMINAL, /* bDescriptorSubtype */
0x01, /* bTerminalID */
0x01, /* wTerminalType MICROPHONE 0x0201 */
0x02,
0x00, /* bAssocTerminal */
0x01, /* bNrChannels */
0x00, /* wChannelConfig 0x0000 Mono */
0x00,
0x00, /* iChannelNames */
0x00, /* iTerminal */
/* 12 byte*/
/*USB Microphone Output Terminal Descriptor */
0x09, /* bLength */
AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */
AUDIO_CONTROL_OUTPUT_TERMINAL, /* bDescriptorSubtype */
0x02, /* bTerminalID */
0x01, /* wTerminalType USB_STREAMING 0x0101*/
0x01,
0x00, /* bAssocTerminal */
0x01, /* bSourceID */
0x00, /* iTerminal */
/* 09 byte*/
/* USB Speaker Input Terminal Descriptor */
AUDIO_INPUT_TERMINAL_DESC_SIZE, /* bLength */
AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */
AUDIO_CONTROL_INPUT_TERMINAL, /* bDescriptorSubtype */
0x05, /* bTerminalID */
0x01, /* wTerminalType AUDIO_TERMINAL_USB_STREAMING 0x0101 */
0x01,
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 */
AUDIO_OUT_FEATURE_UNIT_ID, /* bUnitID */
0x05, /* 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 */
0x03, /* bTerminalID */
0x01, /* wTerminalType 0x0301*/
0x03,
0x00, /* bAssocTerminal */
0x04, /* bSourceID */
0x00, /* iTerminal */
/* 09 byte*/
/* USB Speaker Standard AS Interface Descriptor - Audio Streaming Zero Bandwith */
/* Interface 1, Alternate Setting 0 */
AUDIO_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 */
AUDIO_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 */
0x05, /* bTerminalLink */
0x01, /* bDelay */
0x01, /* wFormatTag AUDIO_FORMAT_PCM 0x0001*/
0x00,
/* 07 byte*/
/* USB Speaker Audio Type III Format Interface Descriptor */
0x0B, /* bLength */
AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */
AUDIO_STREAMING_FORMAT_TYPE, /* bDescriptorSubtype */
AUDIO_FORMAT_TYPE_III, /* bFormatType */
0x02, /* bNrChannels */
0x02, /* bSubFrameSize : 2 Bytes per frame (16bits) */
16, /* bBitResolution (16-bits per sample) */
0x01, /* bSamFreqType only one frequency supported */
SAMPLE_FREQ(USBD_AUDIO_FREQ), /* Audio sampling frequency coded on 3 bytes */
/* 11 byte*/
/* Endpoint 1 - Standard Descriptor */
AUDIO_STANDARD_ENDPOINT_DESC_SIZE, /* bLength */
USB_ENDPOINT_DESCRIPTOR_TYPE, /* bDescriptorType */
AUDIO_OUT_EP, /* bEndpointAddress 1 out endpoint*/
USB_ENDPOINT_TYPE_ISOCHRONOUS, /* bmAttributes */
AUDIO_PACKET_SZE(USBD_AUDIO_FREQ, 2), /* wMaxPacketSize in Bytes (Freq(Samples)*2(Stereo)*2(HalfWord)) */
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*/
/* USB Microphone Standard AS Interface Descriptor - Audio Streaming Zero Bandwith */
/* Interface 2, Alternate Setting 0 */
AUDIO_INTERFACE_DESC_SIZE, /* bLength */
USB_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */
0x02, /* bInterfaceNumber */
0x00, /* bAlternateSetting */
0x00, /* bNumEndpoints */
USB_DEVICE_CLASS_AUDIO, /* bInterfaceClass */
AUDIO_SUBCLASS_AUDIOSTREAMING, /* bInterfaceSubClass */
AUDIO_PROTOCOL_UNDEFINED, /* bInterfaceProtocol */
0x00, /* iInterface */
/* 09 byte*/
/* USB Microphone Standard AS Interface Descriptor - Audio Streaming Operational */
/* Interface 2, Alternate Setting 1 */
AUDIO_INTERFACE_DESC_SIZE, /* bLength */
USB_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */
0x02, /* bInterfaceNumber */
0x01, /* bAlternateSetting */
0x01, /* bNumEndpoints */
USB_DEVICE_CLASS_AUDIO, /* bInterfaceClass */
AUDIO_SUBCLASS_AUDIOSTREAMING, /* bInterfaceSubClass */
AUDIO_PROTOCOL_UNDEFINED, /* bInterfaceProtocol */
0x00, /* iInterface */
/* 09 byte*/
/* USB Microphone Audio Streaming Interface Descriptor */
AUDIO_STREAMING_INTERFACE_DESC_SIZE, /* bLength */
AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */
AUDIO_STREAMING_GENERAL, /* bDescriptorSubtype */
0x02, /* bTerminalLink */
0x01, /* bDelay */
0x01, /* wFormatTag AUDIO_FORMAT_PCM 0x0001*/
0x00,
/* 07 byte*/
/* USB Microphone 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 : 2 Bytes per frame (16bits) */
16, /* bBitResolution (16-bits per sample) */
0x01, /* bSamFreqType only one frequency supported */
SAMPLE_FREQ(USBD_IN_FREQ), /* Audio sampling frequency coded on 3 bytes */
/* 11 byte*/
/* Endpoint 1 - Standard Descriptor */
AUDIO_STANDARD_ENDPOINT_DESC_SIZE, /* bLength */
USB_ENDPOINT_DESCRIPTOR_TYPE, /* bDescriptorType */
AUDIO_IN_EP, /* bEndpointAddress 1 out endpoint*/
USB_ENDPOINT_TYPE_ISOCHRONOUS, /* bmAttributes */
AUDIO_PACKET_SZE(USBD_IN_FREQ, 1), /* wMaxPacketSize in Bytes (Freq(Samples)*2(Stereo)*2(HalfWord)) */
0x01, /* bInterval */
0x00, /* bRefresh */
0x00, /* bSynchAddress */
/* 09 byte*/
/* Endpoint - Audio Microphone 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*/
} ;
When I`m connecting this device to host, it seems that host successfully enumerate it.
Logs of the host (Linux OS):
[12221.001223] usb 3-4: New USB device found, idVendor=0483, idProduct=5730, bcdDevice= 2.00
[12221.001246] usb 3-4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[12221.001248] usb 3-4: Product: STM32 AUDIO Streaming in FS Mode
[12221.001250] usb 3-4: Manufacturer: STMicroelectronics
[12221.001252] usb 3-4: SerialNumber: 347E37553434
[12221.037373] mc: Linux media interface: v0.10
[12221.073785] usbcore: registered new interface driver snd-usb-audio
This newly connected device is able to play audio stream, that it receive from host. But when I`m trying to record something, I saw in logs following message:
[12758.466715] usb 3-4: 2:1: usb_set_interface failed (-32)
[12758.466894] usb 3-4: 2:0: usb_set_interface failed (-32)
[12758.826837] usb 3-4: 2:0: usb_set_interface failed (-32)
[12758.827398] usb 3-4: 2:1: usb_set_interface failed (-32)
Seems, that host is fail to set up second interface - interface for audio stream from device mic to host.
When I`ve tried to sniff USB packet, using Wireshark, I saw following:
- Device successfully send all his descriptors.
- Host tried to set different alt settings for interface 1 - all request finished with success.
- Host tried to do same operation with interface 2 - it failed with error "broken pipe"
Set interface 1. Request:
USB URB
[Source: host]
[Destination: 3.8.0]
URB id: 0xffff8ce44b991e40
URB type: URB_SUBMIT ('S')
URB transfer type: URB_CONTROL (0x02)
Endpoint: 0x00, Direction: OUT
Device: 8
URB bus id: 3
Device setup request: relevant (0)
Data: present (0)
URB sec: 1645475418
URB usec: 822919
URB status: Operation now in progress (-EINPROGRESS) (-115)
URB length [bytes]: 0
Data length [bytes]: 0
[Response in: 32]
Interval: 0
Start frame: 0
Copy of Transfer Flags: 0x00000000
Number of ISO descriptors: 0
Setup Data
bmRequestType: 0x01
bRequest: SET INTERFACE (11)
bAlternateSetting: 0
wInterface: 1
wLength: 0
Set interface 1. Response:
USB URB
[Source: 3.8.0]
[Destination: host]
URB id: 0xffff8ce44b991e40
URB type: URB_COMPLETE ('C')
URB transfer type: URB_CONTROL (0x02)
Endpoint: 0x00, Direction: OUT
Device: 8
URB bus id: 3
Device setup request: not relevant ('-')
Data: not present ('>')
URB sec: 1645475418
URB usec: 822989
URB status: Success (0)
URB length [bytes]: 0
Data length [bytes]: 0
[Request in: 31]
[Time from request: 0.000070000 seconds]
Unused Setup Header
Interval: 0
Start frame: 0
Copy of Transfer Flags: 0x00000000
Number of ISO descriptors: 0
Set interface 2. Request:
USB URB
[Source: host]
[Destination: 3.8.0]
URB id: 0xffff8ce63c2d2840
URB type: URB_SUBMIT ('S')
URB transfer type: URB_CONTROL (0x02)
Endpoint: 0x00, Direction: OUT
Device: 8
URB bus id: 3
Device setup request: relevant (0)
Data: present (0)
URB sec: 1645475418
URB usec: 823040
URB status: Operation now in progress (-EINPROGRESS) (-115)
URB length [bytes]: 0
Data length [bytes]: 0
[Response in: 34]
Interval: 0
Start frame: 0
Copy of Transfer Flags: 0x00000000
Number of ISO descriptors: 0
Setup Data
bmRequestType: 0x01
bRequest: SET INTERFACE (11)
bAlternateSetting: 0
wInterface: 2
wLength: 0
Set interface 2. Response:
USB URB
[Source: 3.8.0]
[Destination: host]
URB id: 0xffff8ce63c2d2840
URB type: URB_COMPLETE ('C')
URB transfer type: URB_CONTROL (0x02)
Endpoint: 0x00, Direction: OUT
Device: 8
URB bus id: 3
Device setup request: not relevant ('-')
Data: not present ('>')
URB sec: 1645475418
URB usec: 823198
URB status: Broken pipe (-EPIPE) (-32)
URB length [bytes]: 0
Data length [bytes]: 0
[Request in: 33]
[Time from request: 0.000158000 seconds]
Unused Setup Header
Interval: 0
Start frame: 0
Copy of Transfer Flags: 0x00000000
Number of ISO descriptors: 0
I put whole wireshark .cap file in my google drive disk:
Code for my overall project you can find in my github (branch - task/usb_headset)
I was tried to set sampling frequency for both audio stream to 48 kHz. According to the descriptors above audio stream from host - 48kHz, stereo; audio stream to host - 16kHz, mono. Same error.
Any help will be appreciated.
Sources
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Source: Stack Overflow
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