osd-contiki/platform/osd-er-lp24/dev/button-sensor.c

/*
* Copyright (c) 2005, Swedish Institute of Computer Science
* 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 Institute 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 INSTITUTE 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 INSTITUTE 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.
*
* This file is part of the Contiki operating system.
*
* @(#)$Id: button-sensor.c,v 1.4 2010/01/14 20:01:19 nifi Exp $
*/
#include "contiki.h"
#include "lib/sensors.h"
#include "dev/button-sensor.h"
//#include "dev/leds.h"

#include <avr/interrupt.h>

//#include "dev/hwconf.h"
//#include "isr_compat.h"

const struct sensors_sensor button_sensor;

static struct timer debouncetimer;
static int status(int type);

static int enabled = 0;

//HWCONF_PIN(BUTTON, 2, 7);
//HWCONF_IRQ(BUTTON, 2, 7);

#define BUTTON_BIT INTF5
#define BUTTON_CHECK_IRQ() (EIFR & BUTTON_BIT) ? 0 : 1

#define PRINTF(...) printf(__VA_ARGS__)
/*---------------------------------------------------------------------------*/
ISR(INT6_vect)
{

//  leds_toggle(LEDS_YELLOW);
  
  if(BUTTON_CHECK_IRQ()) {
    if(timer_expired(&debouncetimer)) {
      timer_set(&debouncetimer, CLOCK_SECOND / 4);
      sensors_changed(&button_sensor);

    }
  }

}
/*---------------------------------------------------------------------------*/
static int value(int type)
{
  return (PORTE & _BV(PE5) ? 0 : 1) || !timer_expired(&debouncetimer);
}
/*---------------------------------------------------------------------------*/
static int configure(int type, int c)
{
 PRINTF("Sensor Button Configure called: %d, %d\n",type,c);

  switch (type) {
  case SENSORS_ACTIVE:
    if (c) {
      if(!status(SENSORS_ACTIVE)) {
timer_set(&debouncetimer, 0);

PRINTF("Setup sensor started\n");

DDRE |= (0<<DDE6); // Set pin as input
PORTE |= (1<<PORTE6); // Set port PORTE bint 5 with pullup resistor
EICRB |= (2<<ISC60); // For falling edge

//BUTTON_SELECT();

//leds_on(LEDS_RED);
EIMSK |= (1<<INT6); // Set int
enabled = 1;
sei();
      }
PRINTF("Sensor EIMSK set\n");
} else {
enabled = 0;
EIMSK &= ~(1<<INT6); // clear int
//leds_off(LEDS_RED);
PRINTF("Setup sensor failed\n");
}
return 1;
  }
  return 0;
}
/*---------------------------------------------------------------------------*/
static int
status(int type)
{
  switch (type) {
  case SENSORS_ACTIVE:
  case SENSORS_READY:
    return enabled;//(EIMSK & (1<<INT5) ? 0 : 1);//BUTTON_IRQ_ENABLED();
  }
  return 0;
}
/*---------------------------------------------------------------------------*/
SENSORS_SENSOR(button_sensor, BUTTON_SENSOR, value, configure, status);