Hardware requirements

  • Micro USB cable

  • MIMXRT685-AUD-EVK board

  • Personal Computer

  • headphones with 3.5 mm stereo jack

  • source of sound (line output to 3.5 mm stereo jack)

  • Line in line

Board settings

To make example work, please make sure board settings are applied: JP43 1-2, R488 1-2 R479 1-2, R429 1-2 R480 1-2, R481 1-2 R510 1-2, R474 1-2 R482 1-2, R478 1-2 JP8 1-2, R491 1-2 R394 1-2, R395 1-2

Prepare the Demo

  1. Connect headphones to J4 or J50 or J51 or J52.

  2. Connect source of sound(from PC or Smart phone) to Audio Line-In connector (J56 or J55, J57).

  3. Connect a micro USB cable between the PC host and the CMSIS DAP USB port (J5) on the board

  4. Open a serial terminal with the following settings:

    • 115200 baud rate

    • 8 data bits

    • No parity

    • One stop bit

    • No flow control

  5. Download the program to the target board.

  6. Launch the debugger in your IDE to begin running the demo. Running the demo ================ When the demo runs successfully, you can hear,

Line in J55 -> Line out J4

Line in J56 -> Line out J50

Line in J57 -> Line out J51

The log below shows example output of the I2S driver demo in the terminal window:

I2S TDM record playback example started!


Codec Init Done.

Starting TDM record playback