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 USB cable

  • TWR-KM34Z50MV3 board

  • Personal Computer

Board settings

Turn on the third switch of S1(connect S1-3 to S1-18).

Prepare the Demo

  1. Connect a USB cable between the host PC and the OpenSDA USB port on the target 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 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. Reset the SoC and run the project.

Running the demo

When the demo runs successfully, the following message is displayed in the terminal:

CMP polling Example

Then change CMP analog input, and watch the change of LED.

  • CMP0_IN1(J11_16) connected to VCC=3.3V: LED ORANGE ON

  • CMP0_IN1(J11_16) connected to GND: LED ORANGE OFF