Audio Codec – Output Sine Wave
AmebaD [AMB21 / AMB22 / AMB23] x 1
3.5mm TRS/TRRS breakout x 1 (e.g., Adafruit 2791 / Sparkfun 11570)
AMB21 / AMB22 Wiring Diagram:
Connect the 3.5mm connector to the RTL8722 board following the diagram.
AMB23 Wiring Diagram:
As AMB23 have a built in microphone on the board, there is no need for any external microphone.
Open the example,
"Files" → "Examples" → “AmebaAudioCodec” →
Upload the code and press the reset button on Ameba once the upload is finished.
Connect a pair of wired headphones to the 3.5mm audio jack and you should hear the generate single sinusoidal tone.