Hardware requirements

  • Micro USB cable

  • LPCXpresso55S16 board

  • Personal Computer

Board settings

The jumper setting: Default jumpers configuration does not work, you will need to add JP20 and JP21 (JP22 optional for ADC use)

Prepare the Demo

  1. Connect a micro USB cable between the PC host and the CMSIS DAP USB port (J1) 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

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

The following lines are printed to the serial terminal when the demo program is executed.

Group GPIO input interrupt example

GINT0 and GINT1 events are configured

Press corresponding switches to generate events

  1. This example configures “Group GPIO interrupt 0”” to be invoked when SW4 switch is pressed by the user. The interrupt callback prints “GINT0 event detected” message on the serial terminal. “”Group GPIO interrupt 1”” is configured to be invoked when both the switches SW1 and SW3 are pressed at the same time. The interrupt callback prints “GINT1 event detected” message on the serial terminal.