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Signed-off-by: HiFiPHile <[email protected]>
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Report asynchronous start and stop completion with transfer results. Replace the ambiguous stream error callback and byte count with explicit transfer-failure events, and ignore stale completions after stopping.
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Move capture and playback FIFO servicing into the main-loop task at half-full and half-drained watermarks. Use transfer callbacks only for diagnostics, share one conversion buffer, and demonstrate that application reads and writes need not be synchronized to USB callbacks.
Signed-off-by: HiFiPHile <[email protected]>
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Remove the narrow public Feature Unit request API while retaining managed mute and volume helpers. Expose validated Audio Control descriptors during enumeration and provide raw asynchronous and synchronous entity requests for advanced controls.
Signed-off-by: HiFiPHile <[email protected]>
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Enforce a shared capture/playback sample rate only while the opposite stream is running. This lets both stopped streams be configured in either order while preventing a live shared clock from changing underneath a transfer.
Signed-off-by: HiFiPHile <[email protected]>
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Add protocol-selectable UAC1/UAC2 parsing, UAC2 terminal and Feature Unit topology, Clock Source discovery, sampling-frequency ranges, and protocol-specific stream controls. Cover UAC2 playback, capture, control discovery, and malformed descriptors with unit tests.
Signed-off-by: HiFiPHile <[email protected]>
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Signed-off-by: HiFiPHile <[email protected]>
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Signed-off-by: HiFiPHile <[email protected]>
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Inspect each associated Feature Unit during mount, cache master mute support and the common MIN, MAX, and RES volume range, and ignore units with neither control. Add typed asynchronous and synchronous mute and volume APIs and demonstrate them in the host example.
Signed-off-by: HiFiPHile <[email protected]>
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Keep capture and playback transfers continuously armed from their completion callbacks. Capture overwrites the oldest complete frames when full, while playback sends silence on underrun without consuming partial queued audio.
Signed-off-by: HiFiPHile <[email protected]>
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Look up the playback Feature Unit in the host example and set its master volume after configuration. The output also reports when a stream has no controllable Feature Unit.
Signed-off-by: HiFiPHile <[email protected]>
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Record terminal and Feature Unit links while parsing the AudioControl block, then resolve the stream association after all entities are known. Common capture and playback descriptor orders are both supported.
Signed-off-by: HiFiPHile <[email protected]>
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Collect only format descriptors with discrete sampling frequencies. The configuration API exposes concrete tuples and cannot safely represent a continuous range as one selectable rate.
Signed-off-by: HiFiPHile <[email protected]>
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Convert full-speed bInterval values to the scheduler microframe timebase and size transfers for the complete service interval. Endpoints with bInterval greater than one no longer run at a one-frame cadence.
Signed-off-by: HiFiPHile <[email protected]>
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Associate one directly connected Feature Unit with each capture and playback stream. This lets applications control microphone and speaker paths independently.
Signed-off-by: HiFiPHile <[email protected]>
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Provide a high-level audio streaming API over UAC 1.0 devices while
keeping the USB topology private: applications select supported
{format, sample_rate, channels} configurations per logical stream, and
the driver owns the mapping to AS interface, alternate setting, and
endpoint.
- One logical stream per direction per instance; multiple AS interfaces
and alternate settings in a direction are merged into the stream's
configuration list (discrete tuples; continuous ranges exposed as a
single configuration at the top rate)
- Asynchronous tuh_audio_configure(): SET_INTERFACE to the selected
alternate setting, open/reconfigure the endpoint, set the sampling
frequency when supported, initialize the FIFO and packet scheduler,
then invoke the completion callback
- Frame-based FIFO streaming: tuh_audio_read()/tuh_audio_write() queue
whole frames; the driver owns transfer replenishment and fractional
packet scheduling (44.1 kHz pays back the 0.1 frame/ms remainder via
an accumulator for exact average pacing)
- tuh_audio_start()/tuh_audio_stop() activate/deactivate the stream
interface through SET_INTERFACE (alt n / alt 0)
Driver correctness fixes:
- Parse only the AC header's interface collection; MIDI Streaming and
other subclasses are skipped
- Keep every discrete format as a separate configuration; endpoints are
opened only for the alternate setting selected by tuh_audio_configure()
- Check tuh_interface_set() return values and SET_INTERFACE transfer
results instead of ignoring failures
- Validate instance state, direction, buffers, and frame counts in every
transfer API
- Feature Unit requests use the control's real width (mute/AGC/loudness
1 byte, others 2 bytes) and convert multibyte values to host order
- Failed/stalled/aborted isochronous transfers reach only the error
callback, never the capture/playback callbacks
The audio_host example uses the new API: 48 kHz stereo by default,
automatic stream restart on error callbacks, a sine test tone on the
playback stream, and periodic mic-only / spk-only / echo phase switching.
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- Fix missing tu_htole16() conversions for wValue and wIndex in
tuh_audio_set_sampling_freq, tuh_audio_get_sampling_freq,
tuh_audio_feature_unit_set, and tuh_audio_feature_unit_get
- Fix incorrect wIndex parameter order in feature unit requests
(unit_id and itf_num were swapped)
- Replace static freq_buf with per-endpoint ctrl buffer in
tuh_audio_set_sampling_freq to avoid concurrency issues
- Update audio_host README to match actual example behavior
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Add TinyUSB Host Audio class driver supporting UAC 1.0 devices.
Features:
- Support multiple Audio Streaming (AS) interfaces with independent format storage
- Support both IN (Microphone) and OUT (Speaker) endpoints
- Per-AS interface format info: channels, sample rate, bit resolution
- Support Feature Unit volume control
- Support sampling frequency get/set
- Add host/audio_host example for STM32F407 discovery board
- Support mono-to-stereo conversion for loopback
Changes:
- Add src/class/audio/audio_host.c and audio_host.h
- Register AUDIO driver in usbh.c
- Add CFG_TUH_AUDIO macro in tusb_option.h
- Add host/audio_host example with CMake and Makefile build support
Tested with Jabra USB headset (stereo speaker + mono microphone) on STM32F407 disco.
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