ESP32 I2S sound generator example

This demonstrates how to use the esp-idf-hal I2S driver under development over at this esp-idf-hal issue.

To use it, you will need the ESP-IDF 5.0 SDK checked out and your $IDF_PATH environment variable pointing to it, e.g.:

cd ~/esp
git clone -b v5.0.1 https://github.com/espressif/esp-idf.git 
./install.sh
export IDF_PATH=$HOME/esp/esp-idf

You will also need to source your export-esp.sh script to configure the Rust ESP environment as usual.

Status

Currently, I am testing this on a SparkFun Thing Plus (ESP32-S2 WROOM) connected to a MAX98357A audio breakout board writed to a TRRS audio jack. Data signals are being written properly to the MAX98357A, but audio is not being generated as I suspect I may have blown up my breakout board.