MCUXpresso_LPC55S69/boards/lpcxpresso55s69/driver_examples/gpio/led_output/cm33_core0

Overview

The GPIO Example project is a demonstration program that uses the KSDK software to manipulate the general-purpose outputs. The example use LEDs and buttons to demonstrates GPIO API for port and pin manipulation (init, set, clear, and toggle).

SDK version

• Version: 2.15.000

Toolchain supported

• IAR embedded Workbench 9.40.1
• Keil MDK 5.38.1
• GCC ARM Embedded 12.2
• MCUXpresso 11.8.0

Hardware requirements

• Mini/micro USB cable
• LPCXpresso55s69 board
• Personal Computer

Board settings

This example project does not call for any special hardware configurations.

Prepare the Demo

Note: MCUXpresso IDE project default debug console is semihost

1. Connect a micro USB cable between the PC host and the CMSIS DAP USB port (P6) 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.

Running the demo

After the board is flashed the Tera Term will print message on terminal.

Example output:

 GPIO Driver example

 The LED is taking turns to shine.

 Standard port read: 402c0

 Masked port read: 40000

 Port state: 64001804

 Port state: 64001804

 Port state: 64001804

 Port state: 64001804
 ...

• When press s1 the LED GREEN will turn to shine