95 lines
2.7 KiB
C
95 lines
2.7 KiB
C
/*
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* Copyright (c) 2010, Mariano Alvira <mar@devl.org> and other contributors
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* to the MC1322x project (http://mc1322x.devl.org) and Contiki.
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki OS.
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*
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* $Id: button-sensor.c,v 1.1 2010/06/09 14:46:30 maralvira Exp $
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*/
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#include "lib/sensors.h"
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#include "dev/button-sensor.h"
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#include "mc1322x.h"
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#include <signal.h>
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const struct sensors_sensor button_sensor;
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static struct timer debouncetimer;
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static int status(int type);
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void kbi4_isr(void) {
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if(timer_expired(&debouncetimer)) {
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timer_set(&debouncetimer, CLOCK_SECOND / 4);
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sensors_changed(&button_sensor);
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}
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clear_kbi_evnt(4);
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}
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static int
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value(int type)
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{
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return GPIO->DATA.GPIO_26 || !timer_expired(&debouncetimer);
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}
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static int
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configure(int type, int c)
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{
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switch (type) {
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case SENSORS_ACTIVE:
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if (c) {
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if(!status(SENSORS_ACTIVE)) {
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timer_set(&debouncetimer, 0);
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enable_irq_kbi(4);
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kbi_edge(4);
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enable_ext_wu(4);
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}
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} else {
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disable_irq_kbi(4);
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}
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return 1;
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}
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return 0;
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}
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static int
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status(int type)
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{
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switch (type) {
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case SENSORS_ACTIVE:
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case SENSORS_READY:
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return bit_is_set(*CRM_WU_CNTL, 20); /* check if kbi4 irq is enabled */
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}
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return 0;
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}
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SENSORS_SENSOR(button_sensor, BUTTON_SENSOR,
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value, configure, status);
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