Introduction

This example shows how to configure GPIO module to trigger an interrupt and an event.

The push button 0 is configured to trigger a GPIO interrupt when it is pressed. In the interrupt handler, the LED0 will be toggled every time.

The EXAMPLE_PIN_EVENT is configured to trigger a GPIO event when detecting a falling edge. Each time a new event is coming, it will trigger the PDCA to send a character to the USART without CPU usage.

Main Files

gpio.c: GPIO driver implementation
gpio.h: GPIO driver header file
gpio_example.c: GPIO example application

Compilation Information

This software is written for GNU GCC and IAR Embedded Workbench® for Atmel®. Other compilers may or may not work.

Device Information

SAM4L device can be used.

Configuration Information

This example has been tested with the following configuration:

SAM4L evaluation kit
SAM4L Xplained Pro
SAM4L8 Xplained Pro
PC terminal settings:
- 115200 bps
- 8 data bits
- no parity bit
- 1 stop bit
- no flow control

Contact Information

For further information, visit Microchip.
Support and FAQ: https://www.microchip.com/support/