• Arduino board: Arduino MKR Zero

• Arduino IDE version (found in Arduino -> About Arduino menu): 1.8.9

I briefly tested the library on my board and used the tone_generator example as a base. It worked great however it seems that I2S is always initialized in master mode. For my use case, I would like to use an external ADC that is run in master mode and use the Arduino in slave mode. It would be great if you could implement that in the library.

• Arduino board: Sparkfun ATSAMD21G R3 Breakout Board

• Arduino IDE version (found in Arduino -> About Arduino menu): 1.18.19

• List the steps to reproduce the problem below (if possible attach a sketch or
  copy the sketch code in too): LIST REPRO STEPS BELOW

Hi!

I2S audio amplifier connected to the standard pins (D0 frame clock, D1 bit clock, D9 data). Works well and is stable with all the Adafruit Github demos included in the library, thanks so much for sharing this code.

My specific issue is in the DMA demo from here:

https://github.com/adafruit/Adafruit_ZeroI2S/blob/master/examples/dma/dma.ino

This demo code works perfectly and I've verified the frame sync frequency on my 'scope is correct:

  /* begin I2S on the default pins. 24 bit depth at
   * 44100 samples per second
   */
  i2s.begin(I2S_32_BIT, 44100);
  i2s.enableTx();

  stat = myDMA.startJob();

However, changing the sample rate to this instead

  /* begin I2S on the default pins. 24 bit depth at
   * 44100 samples per second
   */
  i2s.begin(I2S_32_BIT, 48000);
  i2s.enableTx();

  stat = myDMA.startJob();

... results in clock frequency of 50.00 Khz

Being curious, I set the frequency to 8000 and measured 8.07 Khz, which tracks since I'm using the internal oscillator, not a crystal.

Other testing:

8000 Hz request --> 8.07 kHz output
46kHz request --> 46.89 kHz output
48kHz request --> 50.00 kHz output

Maybe I've made a silly error somewhere? I'm running the demo code otherwise unmodified.

I think there might be a typo here. It should be clockpin == 11.

Hello,
I am using Adafruit_M0 board which sends a sinewave from the DMA buffer to external amplifier via I2S. I have 2 chips on the board which get triggered simultaneously. I was trying to use i2s_1.disableTx() and i2s_2.disableTx() alternately to get the sinewave on both the chips alternately, but instead I see sinewave on both chips output simultaneously. I suspect the disabling is not getting implemented.
Anyone had issues with getting the disable() function to work correctly?

Hi, thanks for this great library.
Do you plan by any chance to support the Feather nRF52840 board ? As far as I know, the nRF52840 does have I2S capabilities.

Hi, is there any example to play audio files using feather with this library and SD card?

At least this was the way to get it running on my MKR1000 :-)

Thanks for the great work, can't wait the MCLK for all my failed I2S-Chips.

I am using an Adafruit I2S Mic with M0 Feather Board. Which parameters/flags do I need to change to read MONO channel data? Currently it is reading stereo data.

Hi,

if someone (me) wants to create a wing with I2S interface it's a bit tricky to figure out the right pins.
From "Learn" I found that

• Feather M0 is capable of either I2S Data out OR Data in
  • WS (pin0), CLK(pin1)
  • Data In/out (pin9)
• Feather M4 is cabable of I2S Data out AND Data in (simultaneous)
  • WS (pin0), CLK(pin1)
  • Data in (pin12)
  • Data out (pin11)

From basic example I found pin2 as data in.

Adafruit_ZeroI2S i2s(0, 1, 9, 2);

And last but not least.. if the MCLK output is supported in the future.. which pin would that be?