MCUXpresso SDK Documentation
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Hardware requirements

Hardware requirements#

  • Micro USB cable

  • MIMX8ULP-EVK/EVK9 board

  • J-Link Debug Probe

  • 5V power supply

  • Personal Computer

  • Microphone

Board settings#

populate J20, J21 Connect microphone module to EVK board: 3V->J20-8 GND->J20-7 CLK->J21-4 DATA->J21-3

Please note this application can’t support running with Linux BSP!

Prepare the Demo#

  1. Connect 5V power supply and JLink Plus to the board, switch SW10 to power on the board

  2. Connect a micro USB cable between the host PC and the J17 USB port on the target board.

  3. Open a serial terminal with the following settings:

    • 115200 baud rate

    • 8 data bits

    • No parity

    • One stop bit

    • No flow control

  4. Download the program to the target board.

  5. Launch the debugger in your IDE to begin running the demo.

Running the demo#

When the demo runs successfully, please speak or play a song nearby microphone, then you will see log on the terminal like:

PDM hwvad example started!

Voice detected

Voice detected

...

PDM hwvad example finished!

Note: There is a variable in this example which initial as 50, once voice detected, it will decrease by one until 0, then example finish.

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