button.h

/*
 * Authors: Brendan Le Foll <brendan.le.foll@intel.com>
 *          Mihai Tudor Panu <mihai.tudor.panu@intel.com>
 *          Sarah Knepper <sarah.knepper@intel.com>
 *          Abhishek Malik <abhishek.malik@intel.com>
 * Copyright (c) 2014 - 2016 Intel Corporation.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#pragma once

#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <stdio.h>

#include "upm.h"
#include "mraa/gpio.h"

typedef struct _button_context {
    mraa_gpio_context    gpio;
    uint8_t              gpio_pin;
    bool                 isr_installed;
} *button_context;

button_context button_init(int pin);

void button_close(button_context dev);
upm_result_t button_get_value(button_context dev, bool* val);
upm_result_t button_install_isr(button_context dev, mraa_gpio_edge_t edge_level, void (*isr)(void *), void *arg);
upm_result_t button_uninstall_isr(button_context);