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

This example project does not call for any special hardware configurations. Although not required, the recommendation is to leave the development board’s jumper settings and configurations in default state when running this example.

Prepare the Demo

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

  2. Open a serial terminal with these settings:

    • 115200 baud rate

    • 8 data bits

    • No parity

    • One stop bit

    • No flow control

  3. Download the program to the target board.

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

Running the demo

These instructions are displayed/shown on the terminal window:

Low Power Timer Example
LPTMR interrupt No.1
LPTMR interrupt No.2
LPTMR interrupt No.3
....................
....................
~~~~~~~~~~~~~~~~~~~~~~~
And you will find the LED RED is taking turns to shine.