osd-contiki/platform/cc2530dk/dev/button-sensor.c

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/*
* 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.
*/
/*
* This file contains ISRs: Keep it in the HOME bank.
*/
#include "dev/port.h"
#include "dev/button-sensor.h"
/*---------------------------------------------------------------------------*/
#if BUTTON_SENSOR_ON
static __data struct timer debouncetimer;
/*---------------------------------------------------------------------------*/
static
int value(int type)
{
return BUTTON_READ() || !timer_expired(&debouncetimer);
}
/*---------------------------------------------------------------------------*/
static
int status(int type)
{
switch (type) {
case SENSORS_ACTIVE:
case SENSORS_READY:
return BUTTON_IRQ_ENABLED();
}
return 0;
}
/*---------------------------------------------------------------------------*/
static
int configure(int type, int value)
{
switch(type) {
case SENSORS_HW_INIT:
P0INP |= 2; /* Tri-state */
BUTTON_IRQ_ON_PRESS();
BUTTON_FUNC_GPIO();
BUTTON_DIR_INPUT();
return 1;
case SENSORS_ACTIVE:
if(value) {
if(!BUTTON_IRQ_ENABLED()) {
timer_set(&debouncetimer, 0);
BUTTON_IRQ_FLAG_OFF();
BUTTON_IRQ_ENABLE();
}
} else {
BUTTON_IRQ_DISABLE();
}
return 1;
}
return 0;
}
/*---------------------------------------------------------------------------*/
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#if MODEL_CC2531
void
port_1_isr(void) __interrupt(P1INT_VECTOR)
#else
void
port_0_isr(void) __interrupt(P0INT_VECTOR)
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#endif
{
EA = 0;
ENERGEST_ON(ENERGEST_TYPE_IRQ);
/* This ISR is for the entire port. Check if the interrupt was caused by our
* button's pin. */
if(BUTTON_IRQ_CHECK()) {
if(timer_expired(&debouncetimer)) {
timer_set(&debouncetimer, CLOCK_SECOND / 8);
sensors_changed(&button_sensor);
}
}
BUTTON_IRQ_FLAG_OFF();
ENERGEST_OFF(ENERGEST_TYPE_IRQ);
EA = 1;
}
/*---------------------------------------------------------------------------*/
SENSORS_SENSOR(button_sensor, BUTTON_SENSOR, value, configure, status);
#endif /* BUTTON_SENSOR_ON */