button-sensor.c

/*
 * Copyright (c) 2014, Analog Devices, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */
/**
 * \author Ian Martin <martini@redwirellc.com>
 */

#include "lib/sensors.h"
#include "dev/button-sensor.h"

#include <signal.h>

#define JOYSTICK_PUSH  (!(P5 & BIT(5)))
#define JOYSTICK_RIGHT (!(P5 & BIT(4)))
#define JOYSTICK_DOWN  (!(P5 & BIT(3)))
#define JOYSTICK_LEFT  (!(P5 & BIT(2)))
#define JOYSTICK_UP    (!(P5 & BIT(1)))

const struct sensors_sensor button_sensor;

static int
value(int type)
{
  return JOYSTICK_PUSH;
}
static int
configure(int type, int c)
{
  switch(type) {
  case SENSORS_ACTIVE:
    /* TODO */
    return 1;
  }
  return 0;
}
static int
status(int type)
{
  switch(type) {
  case SENSORS_ACTIVE:
  case SENSORS_READY:
    return 0; /* TODO */
  }
  return 0;
}
SENSORS_SENSOR(button_sensor, BUTTON_SENSOR,
               value, configure, status);