Feature request: Support Teensy boards

[madskjeldgaard]

Problem Description

It would be amazing if the Teensy boards were supported, at least the Teensy 4.x series which is the newer models, so teensy 4.1 and teensy 4.0.

https://www.pjrc.com/teensy/pinout.html

Device Description

Teensy 4.0

Sketch

#include <AudioTools.h>
#include <Arduino.h>

AudioInfo info(44100, 2, 16);
SineWaveGenerator<int16_t> sineWave(32000);                // subclass of SoundGenerator with max amplitude of 32000
GeneratedSoundStream<int16_t> sound(sineWave);             // Stream generated from sine wave
I2SStream out;
StreamCopy copier(out, sound);                             // copies sound into i2s

// Arduino Setup
void setup(void) {
  // Open Serial
  Serial.begin(115200);
  while(!Serial);
  AudioLogger::instance().begin(Serial, AudioLogger::Info);

  // start I2S
  Serial.println("starting I2S...");
  auto config = out.defaultConfig(TX_MODE);
  config.copyFrom(info);
  out.begin(config);

  // Setup sine wave
  sineWave.begin(info, N_B4);
  Serial.println("started...");
}

// Arduino loop - copy sound to out
void loop() {
  copier.copy();
}

Other Steps to Reproduce

Try to compile it.

What is your development environment

platformio

I have checked existing issues, discussions and online documentation

• I confirm I have checked existing issues, discussions and online documentation

[madskjeldgaard]

The output i2s class for Teensy is here:

https://github.com/PaulStoffregen/Audio/blob/master/output_i2s.h

And the pins used for i2s output:

T3.x	T4.x	Signal	Direction
9	21	BCLK	Output
11	23	MCLK	Output
22	7	TX	Output
23	20	LRCLK	Output