Example

Add this to the main loop or a setup function:

    /* Configure push button 0 to trigger an interrupt on falling edge */
    ioport_set_pin_dir(EXAMPLE_BUTTON_INT, IOPORT_DIR_INPUT);
    ioport_set_pin_mode(EXAMPLE_BUTTON_INT, IOPORT_MODE_PULLUP |
            IOPORT_MODE_GLITCH_FILTER);
    ioport_set_pin_sense_mode(EXAMPLE_BUTTON_INT, IOPORT_SENSE_FALLING);
    if (!gpio_set_pin_callback(EXAMPLE_BUTTON_INT, pb0_callback, 1)) {
        printf("Set pin callback failure!\r\n");
        while (1) {
        }
    }
    gpio_enable_pin_interrupt(EXAMPLE_BUTTON_INT);

1. Initialize a pin to trigger an interrupt. Here, we initialize PC03 as an input pin with pull up and glitch filter and to generate an interrupt on a falling edge.

       ioport_set_pin_dir(EXAMPLE_BUTTON_INT, IOPORT_DIR_INPUT);
       ioport_set_pin_mode(EXAMPLE_BUTTON_INT, IOPORT_MODE_PULLUP |
               IOPORT_MODE_GLITCH_FILTER);
       ioport_set_pin_sense_mode(EXAMPLE_BUTTON_INT, IOPORT_SENSE_FALLING);

2. Set a callback for the pin interrupt.

       if (!gpio_set_pin_callback(EXAMPLE_BUTTON_INT, pb0_callback, 1)) {
           printf("Set pin callback failure!\r\n");
           while (1) {
           }
       }

3. Enable pin interrupt.

       gpio_enable_pin_interrupt(EXAMPLE_BUTTON_INT);

Interrupt Usage

When an interrupt happens on a pin, it will execute your callback function.

static void pb0_callback(void)
{
    /* Handle pin interrupt here e.g. toggle an LED */
    LED_Toggle(LED0);
}