122 lines
4.2 KiB
C
122 lines
4.2 KiB
C
/*
|
|
* Copyright (c) 2015, Zolertia <http://www.zolertia.com>
|
|
* 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.
|
|
*
|
|
*/
|
|
/**
|
|
* \file
|
|
* Reed sensor driver file
|
|
* \author
|
|
* Antonio Lignan <alinan@zolertia.com>
|
|
*/
|
|
|
|
#include "contiki.h"
|
|
#include "lib/sensors.h"
|
|
#include "dev/reed-sensor.h"
|
|
#include "sys/process.h"
|
|
#include "sys/ctimer.h"
|
|
/*---------------------------------------------------------------------------*/
|
|
#ifndef REED_CHECK_PERIOD
|
|
#define REED_CHECK_PERIOD CLOCK_SECOND
|
|
#endif
|
|
/*---------------------------------------------------------------------------*/
|
|
static int current_status = -1;
|
|
static struct ctimer change_timer;
|
|
process_event_t reed_sensor_event_changed;
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
status(int type)
|
|
{
|
|
switch(type) {
|
|
case SENSORS_ACTIVE:
|
|
case SENSORS_READY:
|
|
return ~(REED_PORT_DIR & REED_READ_PIN);
|
|
}
|
|
return REED_SENSOR_ERROR;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
value(int type)
|
|
{
|
|
if((!status(SENSORS_ACTIVE)) || (type != REED_SENSOR_VAL)) {
|
|
return REED_SENSOR_ERROR;
|
|
}
|
|
return (REED_PORT_READ & REED_READ_PIN) ? REED_CLOSED : REED_OPEN;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
check_callback(void *data)
|
|
{
|
|
static int new_status;
|
|
if(current_status == -1) {
|
|
ctimer_stop(&change_timer);
|
|
return;
|
|
}
|
|
|
|
new_status = value(REED_SENSOR_VAL);
|
|
if(new_status != current_status) {
|
|
current_status = new_status;
|
|
process_post(PROCESS_BROADCAST, reed_sensor_event_changed, ¤t_status);
|
|
}
|
|
ctimer_reset(&change_timer);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
configure(int type, int c)
|
|
{
|
|
switch(type) {
|
|
case SENSORS_ACTIVE:
|
|
if(c) {
|
|
if(!status(SENSORS_ACTIVE)) {
|
|
REED_PORT_SEL |= REED_READ_PIN;
|
|
REED_PORT_DIR &= ~REED_READ_PIN;
|
|
REED_PORT_REN |= REED_READ_PIN;
|
|
REED_PORT_PRES |= REED_READ_PIN;
|
|
}
|
|
} else {
|
|
REED_PORT_DIR |= REED_READ_PIN;
|
|
REED_PORT_REN &= ~REED_READ_PIN;
|
|
}
|
|
return REED_SENSOR_SUCCESS;
|
|
case REED_SENSOR_MODE:
|
|
if(c == REED_SENSOR_EVENT_MODE) {
|
|
current_status = value(REED_SENSOR_VAL);
|
|
ctimer_set(&change_timer, REED_CHECK_PERIOD, check_callback, NULL);
|
|
} else if(c == REED_SENSOR_EVENT_POLL) {
|
|
current_status = -1;
|
|
ctimer_stop(&change_timer);
|
|
} else {
|
|
return REED_SENSOR_ERROR;
|
|
}
|
|
return REED_SENSOR_SUCCESS;
|
|
}
|
|
return REED_SENSOR_ERROR;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
SENSORS_SENSOR(reed_sensor, REED_SENSOR, value, configure, status);
|