How to use TDM Microphone Array Demo Board

[abcteo]

Hi all,

I encounter the TDM microphone array ( 16 mics),which is very interesting for me
The details can be found here https://www.invensense.com/download-...o-board-guide/

I would like to read the audio signal of the array using either Rasperry Pi ( or even computer)
However, as i has no knowledge in electronic, i could not make use of the board.

As i try to read from the board guide
and the PI GPIO layout https://webofthings.org/wp-content/u...10/pi-gpio.png

I think,
to power the board, i can connect the PI GPIO 3.3V+ground to the J9 jumper.
to read signal, i need to connect Pin5 of J1 to any GPIO of PI. Let assume GPIO4

However, I dont know what should be the correct way to read the stream data form the TDM board
whether the data is interleaving or non-interleaving, block size, bit format.....

As i could not find any document. Please help me on this. Thank you very much

[Theremingenieur]

Although this is not forcibly a Teensy question, I only can give you a few hints: TDM is a serial audio format, similar to I2S but allowing more audio channels (for example 4) in a frame than the latter which is limited to 2.
GPIO is definitively not the way to go for that - too bulky and too slow. You'll need a MCU with internal dedicated I2S/TDM hardware. The Teensy 3.x processors have that, and the Teensy audio library has a TDM input object to handle 16 channels. So, this could be a way to go: https://www.pjrc.com/teensy/gui/inde...=AudioInputTDM