187 lines
7.1 KiB
C
187 lines
7.1 KiB
C
/*
|
|
* Copyright (c) 2015 NXP B.V.
|
|
* 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 NXP B.V. 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 NXP B.V. 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 NXP B.V. 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.
|
|
*
|
|
* Author: Theo van Daele <theo.van.daele@nxp.com>
|
|
*
|
|
*/
|
|
#include "contiki.h"
|
|
#include "sys/etimer.h"
|
|
#include "lib/sensors.h"
|
|
#include "ht-sensor.h"
|
|
#include <stdlib.h>
|
|
#include <HtsDriver.h>
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/* LOCAL DEFINITIONS */
|
|
/*---------------------------------------------------------------------------*/
|
|
/* #define DEBUG */
|
|
#ifdef DEBUG
|
|
#include <stdio.h>
|
|
#define PRINTF(...) printf(__VA_ARGS__)
|
|
#else
|
|
#define PRINTF(...)
|
|
#endif
|
|
|
|
typedef enum {
|
|
HT_SENSOR_STATUS_NOT_INIT = 0,
|
|
HT_SENSOR_STATUS_INIT,
|
|
HT_SENSOR_STATUS_NOT_ACTIVE = HT_SENSOR_STATUS_INIT,
|
|
HT_SENSOR_STATUS_ACTIVE
|
|
} ht_sensor_status_t;
|
|
|
|
/* Absolute delta in light or humidity level needed to generate event */
|
|
#define DELTA_TEMP_SENSOR_VALUE 1
|
|
#define DELTA_HUM_SENSOR_VALUE 1
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/* LOCAL DATA DEFINITIONS */
|
|
/*---------------------------------------------------------------------------*/
|
|
const struct sensors_sensor ht_sensor;
|
|
volatile static ht_sensor_status_t ht_sensor_status = HT_SENSOR_STATUS_NOT_INIT;
|
|
static int prev_temp_event_val = 0;
|
|
static int prev_hum_event_val = 0;
|
|
static int temp_sensor_value = 0;
|
|
static int hum_sensor_value = 0;
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/* LOCAL FUNCTION PROTOTYPES */
|
|
/*---------------------------------------------------------------------------*/
|
|
PROCESS(HTSensorSampling, "Humidity/Temperature sensor");
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/* PUBLIC FUNCTIONS */
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
configure(int type, int value)
|
|
{
|
|
if(type == SENSORS_HW_INIT) {
|
|
PRINTF("SENSORS_HW_INIT\n");
|
|
ht_sensor_status = HT_SENSOR_STATUS_INIT;
|
|
process_start(&HTSensorSampling, NULL);
|
|
return 1;
|
|
} else if(type == SENSORS_ACTIVE) {
|
|
if(ht_sensor_status != HT_SENSOR_STATUS_NOT_INIT) {
|
|
if(value) {
|
|
/* ACTIVATE SENSOR */
|
|
vHTSreset();
|
|
prev_temp_event_val = 0;
|
|
prev_hum_event_val = 0;
|
|
/* Activate ht sensor. Start sampling */
|
|
PRINTF("HT SENSOR ACTIVATED\n");
|
|
ht_sensor_status = HT_SENSOR_STATUS_ACTIVE;
|
|
process_post(&HTSensorSampling, PROCESS_EVENT_MSG, (void *)&ht_sensor_status);
|
|
} else {
|
|
/* DE-ACTIVATE SENSOR */
|
|
PRINTF("HT SENSOR DE-ACTIVATED\n");
|
|
ht_sensor_status = HT_SENSOR_STATUS_NOT_ACTIVE;
|
|
process_post(&HTSensorSampling, PROCESS_EVENT_MSG, (void *)&ht_sensor_status);
|
|
}
|
|
return 1;
|
|
} else {
|
|
/* HT sensor must be intialised before being (de)-activated */
|
|
PRINTF("ERROR: NO HW_INIT HT SENSOR\n");
|
|
return 0;
|
|
}
|
|
} else {
|
|
/* Non valid type */
|
|
return 0;
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
status(int type)
|
|
{
|
|
if(type == SENSORS_ACTIVE) {
|
|
return ht_sensor_status == HT_SENSOR_STATUS_ACTIVE;
|
|
} else if(type == SENSORS_READY) {
|
|
return ht_sensor_status != HT_SENSOR_STATUS_NOT_INIT;
|
|
}
|
|
return 0;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
value(int type)
|
|
{
|
|
/* type: HT_SENSOR_TEMP is to return temperature
|
|
!=HT_SENSOR_TEMP is to return humidity */
|
|
if(type == HT_SENSOR_TEMP) {
|
|
return temp_sensor_value;
|
|
} else {
|
|
return hum_sensor_value;
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
/* LOCAL FUNCTIONS */
|
|
/*---------------------------------------------------------------------------*/
|
|
/* Process to get ht sensor value.
|
|
ht sensor is sampled. Sampling stopped when sensor is de-activated.
|
|
Event is generated if temp and/or hum value changed at least the value DELTA_TEMP_SENSOR_VALUE
|
|
or DELTA_HUM_SENSOR_VALUE since last event. */
|
|
PROCESS_THREAD(HTSensorSampling, ev, data)
|
|
{
|
|
PROCESS_BEGIN();
|
|
static struct etimer et;
|
|
|
|
etimer_set(&et, CLOCK_SECOND);
|
|
while(1) {
|
|
PROCESS_WAIT_EVENT_UNTIL((ev == PROCESS_EVENT_TIMER) || (ev == PROCESS_EVENT_MSG));
|
|
if(ev == PROCESS_EVENT_TIMER) {
|
|
/* Handle sensor reading. */
|
|
vHTSstartReadTemp();
|
|
temp_sensor_value = u16HTSreadTempResult();
|
|
PRINTF("Temperature sample: %d\n", temp_sensor_value);
|
|
vHTSstartReadHumidity();
|
|
hum_sensor_value = u16HTSreadHumidityResult();
|
|
PRINTF("Humidity sample: %d\n", hum_sensor_value);
|
|
if((abs(temp_sensor_value - prev_temp_event_val) > DELTA_TEMP_SENSOR_VALUE) ||
|
|
(abs(hum_sensor_value - prev_hum_event_val) > DELTA_HUM_SENSOR_VALUE)) {
|
|
prev_temp_event_val = temp_sensor_value;
|
|
prev_hum_event_val = hum_sensor_value;
|
|
sensors_changed(&ht_sensor);
|
|
}
|
|
etimer_reset(&et);
|
|
} else {
|
|
/* ev == PROCESS_EVENT_MSG */
|
|
if(*(int *)data == HT_SENSOR_STATUS_NOT_ACTIVE) {
|
|
/* Stop sampling */
|
|
etimer_stop(&et);
|
|
} else if((*(int *)data == HT_SENSOR_STATUS_ACTIVE)) {
|
|
/* restart sampling */
|
|
etimer_restart(&et);
|
|
}
|
|
}
|
|
}
|
|
PROCESS_END();
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/* Sensor defintion for sensor module */
|
|
SENSORS_SENSOR(ht_sensor, HT_SENSOR, value, configure, status);
|
|
/*---------------------------------------------------------------------------*/
|