MCUXpresso SDK Documentation
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Hardware requirements

Hardware requirements#

  • Mini/micro USB cable

  • FRDM-K22F 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 interrupt Example

Then change CMP analog input, and watch the change of LED. - CMP0_IN0 (Jump J1-16) connected to VCC=3.3V(Jump J25-4): LED GREEN on - CMP0_IN0 (Jump J1-16) connected to GND(Jump J2-14): LED GREEN off

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