forked from PAWPAW-Mirror/lib_xua
ba666fb314
When testing with the Play/Pause Usage (0xCD) with a Mac as USB Host, adding in this assertion period produced reliable playing and pausing of the iTunes app every 10 seconds. Without an explicit assertion period, i.e. sending only one report with the lsb set to 1b followed by many reports with the lsb set to 0b, the iTunes app behaved as though it did not see many of the Play/Pause signals. The inclusion of an assertion period may or may not help when reporting Voice Command events on Andriod.
lib_xua
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Summary
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USB Audio Shared Components for use in the XMOS USB Audio Refererence Designs.
This library enables the development of USB Audio devices on the XMOS xCORE architecture.
Features
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Key features of the various applications in this repository are as follows
- USB Audio Class 1.0/2.0 Compliant
- Fully Asynchronous operation
- Support for the following sample frequencies: 8, 11.025, 12, 16, 32, 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384kHz
- Input/output channel and individual volume/mute controls supported
- Support for dynamically selectable output audio formats (e.g. resolution)
- Field firmware upgrade compliant to the USB Device Firmware Upgrade (DFU) Class Specification
- S/PDIF output
- S/PDIF input
- ADAT output
- ADAT input
- MIDI input/output (Compliant to USB Class Specification for MIDI devices)
- DSD output (Native and DoP mode) at DSD64 and DSD128 rates
- Mixer with flexible routing
- Simple playback controls via Human Interface Device (HID)
- Support for operation with Apple devices (requires software module sc_mfi for MFI licensees only - please contact XMOS)
Note, not all features may be supported at all sample frequencies, simultaneously or on all devices. Some features also require specific host driver support.
Software version and dependencies
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.. libdeps::
Related Application Notes
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The following application notes use this library:
* AN000246 - Simple USB Audio Device using lib_xua
* AN000247 - Using lib_xua with lib_spdif (transmit)
* AN000248 - Using lib_xua with lib_mic_array