11 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);