contiki/platform/redbee-dev/button-sensor.c

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/*
* Copyright (c) 2010, Mariano Alvira <mar@devl.org> and other contributors
* to the MC1322x project (http://mc1322x.devl.org) and Contiki.
*
* 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 OS.
*
* $Id: button-sensor.c,v 1.1 2010/11/07 13:56:17 maralvira Exp $
*/
#include "lib/sensors.h"
#include "dev/button-sensor.h"
#include "mc1322x.h"
#include <signal.h>
const struct sensors_sensor button_sensor;
static struct timer debouncetimer;
static int status(int type);
void kbi4_isr(void) {
if(timer_expired(&debouncetimer)) {
timer_set(&debouncetimer, CLOCK_SECOND / 4);
sensors_changed(&button_sensor);
}
clear_kbi_evnt(4);
}
static int
value(int type)
{
return bit_is_set(gpio_data_get((0x1ULL << 26)), 26) || !timer_expired(&debouncetimer);
}
static int
configure(int type, int c)
{
switch (type) {
case SENSORS_ACTIVE:
if (c) {
if(!status(SENSORS_ACTIVE)) {
timer_set(&debouncetimer, 0);
enable_irq_kbi(4);
}
} else {
disable_irq_kbi(4);
}
return 1;
}
return 0;
}
static int
status(int type)
{
switch (type) {
case SENSORS_ACTIVE:
case SENSORS_READY:
return bit_is_set(*CRM_WU_CNTL, 20); /* check if kbi4 irq is enabled */
}
return 0;
}
SENSORS_SENSOR(button_sensor, BUTTON_SENSOR,
value, configure, status);