Hardware requirements

  • Type-C USB cable

  • FRDM-MCXN947 board

  • Personal Computer

Board settings

PLU input pins connection:

  • J8-23 (GPIO4_18) to J1-4 (PLU_IN2).

  • J8-24 (GPIO4_19) to J1-2 (PLU_IN3).

  • J8-25 (GPIO4_20) to J8-6 (PLU_IN5).

PLU output pins connection:

  • J8-17 (PLU_OUT0) to J2-4 (LED_RED).

  • J8-18 (PLU_OUT1) to J2-6 (LED_GREEN).

  • J8-19 (PLU_OUT2) to J1-14 (LED_BLUE).

Prepare the Demo

Note: MCUXpresso IDE project default debug console is semihost

  1. Connect a type-c USB cable between the PC host and the MCU-Link port(J17 on the board).

  2. Open a serial terminal with the following settings (See Appendix A in Getting started guide for description how to determine serial port number):

    • 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 demo.

Expected Result

Input source and LED status table:

PLU_IN5

PLU_IN3

PLU_IN2

LED_BLUE

LED_GREEN

LED_RED

0

0

0

off

off

off

0

0

1

off

off

on

0

1

0

off

on

off

0

1

1

on

off

off

1

0

0

off

on

on

1

0

1

on

off

on

1

1

0

on

on

off

1

1

1

on

on

on

The log below shows the output of the plu combination example in the terminal window:

PLU combination driver example.

Select the input source.
1. Input source 0
2. Input source 1
3. Input source 2
4. Set all three input sources.
0
Select the input value.
0. Low level.
1. High level.
1
Select the input source.
0. Input source 0
1. Input source 1
2. Input source 2
3. Set all three input sources.
3
Input the three values like 000.
0. Low level.
1. High level.
011

The LED will change as the description in the table