Example

/* 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. 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. 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. 3.
   Enable pin interrupt.

   gpio_enable_pin_interrupt(EXAMPLE_BUTTON_INT);