Hardware requirements

  • Mini/micro USB cable

  • MIMXRT1170-EVKB board

  • Personal Computer

  • Headphone(OMTP standard)

Board settings

To make the examples works, please remove below resistors if on board wifi chip is not DNP: R228,R229,R232,R234 Ensure the resistors mounted below: R2001,R2002,R2003,R2004,R2005,R2006 and R2007.

Prepare the Demo

  1. Connect a USB cable between the host PC and the OpenSDA USB port on the target board.

  2. Open a serial terminal with the following settings:

    • 115200 baud rate

    • 8 data bits

    • No parity

    • One stop bit

    • No flow control

  3. Download the program to the target board.

  4. Insert the headphones into the headphone jack on MIMXRT1170-EVKB board (J101).

  5. Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.

Running the demo

Note: This demo uses both headphone mic and board main mic(P1) as input source. The headphone mic provides left channel data, and main mic (P1) provides right channel data. If users found there is noise while do record operation, most probably it is the headphone standard issue (OMTP and CTIA standard difference). You should use the OMTP standard headphone. You can disable the left channel by using an headphone without microphone feature. This demo uses codec master mode(external mclk mode).

When the demo runs successfully, you can hear the tone and the log would be seen on the OpenSDA terminal like:

SAI EDMA standalone transfer example started!