Adds AP4 Lite support, AmbiqSuite 4.4.1. Fixes ringbuffer audio bug

AmbiqAI / neuralSPOT

NeuralSPOT is Ambiq's AI SDK and Toolkit

https://ambiq.com

BSD 3-Clause "New" or "Revised" License

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Closed carloshmorales closed 1 year ago

carloshmorales commented 1 year ago

This PR:

Adds AmbiqSuite R4.4.1, leaves default as R4.3.0
Adds support for Apollo4 Lite (make BOARD=apollo4l AS_VERSION=R4.4.1 to compile for this target)
AP4 Lite i2c and PDM audio functionality tested
Ringbuffer Audio bug fixed (was causing distortion for PDM mode in basic_tf_stub)
Reenables O3 optimization in makefile