This is the documentation for the latest (main) development branch of mcuxpresso sdk. If you are looking for the documentation of previous releases, use the drop-down menu on the left and select the desired version.

Hardware requirements

  • Mini/micro USB cable

  • FRDM-K32L2B board

  • Personal Computer

Board settings

No special is needed.

Prepare the Demo

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

  2. Connect the analog signal source’s output to the input of used-defined comparator’s channel (defined as “DEMO_CMP_USER_CHANNEL” in source code.)

  3. Open a serial terminal on PC for OpenSDA serial device with these settings:

    • 115200 baud rate

    • 8 data bits

    • No parity

    • One stop bit

    • No flow control

  4. Download the program to the target board.

  5. Reset the SoC and run the project.

Running the demo

When the demo runs successfully, the log would be seen on the OpenSDA terminal like:

CMP polling Example

Then change CMP analog input, and watch the change of LED. - CMP0_IN0 (Jump J1-9) connected to VCC=3.3V (Jump J3-8): LED RED on - CMP0_IN0 (Jump J1-9) connected to GND (Jump J2-14): LED RED off