160 lines
5.3 KiB
C
160 lines
5.3 KiB
C
/*
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* Copyright (c) 2015, Yanzi Networks AB.
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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 copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* 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,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* \addtogroup ipso-objects
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* @{
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*/
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/**
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* \file
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* Implementation of OMA LWM2M / IPSO Temperature
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* \author
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* Joakim Eriksson <joakime@sics.se>
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* Niclas Finne <nfi@sics.se>
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*/
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#include <stdint.h>
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#include "ipso-objects.h"
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#include "lwm2m-object.h"
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#include "lwm2m-engine.h"
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#include "er-coap-engine.h"
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#ifdef IPSO_TEMPERATURE
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extern const struct ipso_objects_sensor IPSO_TEMPERATURE;
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#endif /* IPSO_TEMPERATURE */
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#ifndef IPSO_TEMPERATURE_MIN
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#define IPSO_TEMPERATURE_MIN (-50 * LWM2M_FLOAT32_FRAC)
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#endif
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#ifndef IPSO_TEMPERATURE_MAX
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#define IPSO_TEMPERATURE_MAX (80 * LWM2M_FLOAT32_FRAC)
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#endif
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static struct ctimer periodic_timer;
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static int32_t min_temp;
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static int32_t max_temp;
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static int read_temp(int32_t *value);
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/*---------------------------------------------------------------------------*/
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static int
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temp(lwm2m_context_t *ctx, uint8_t *outbuf, size_t outsize)
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{
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int32_t value;
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if(read_temp(&value)) {
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return ctx->writer->write_float32fix(ctx, outbuf, outsize,
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value, LWM2M_FLOAT32_BITS);
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}
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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LWM2M_RESOURCES(temperature_resources,
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/* Temperature (Current) */
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LWM2M_RESOURCE_CALLBACK(5700, { temp, NULL, NULL }),
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/* Units */
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LWM2M_RESOURCE_STRING(5701, "Celcius"),
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/* Min Range Value */
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LWM2M_RESOURCE_FLOATFIX(5603, IPSO_TEMPERATURE_MIN),
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/* Max Range Value */
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LWM2M_RESOURCE_FLOATFIX(5604, IPSO_TEMPERATURE_MAX),
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/* Min Measured Value */
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LWM2M_RESOURCE_FLOATFIX_VAR(5601, &min_temp),
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/* Max Measured Value */
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LWM2M_RESOURCE_FLOATFIX_VAR(5602, &max_temp),
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);
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LWM2M_INSTANCES(temperature_instances,
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LWM2M_INSTANCE(0, temperature_resources));
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LWM2M_OBJECT(temperature, 3303, temperature_instances);
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/*---------------------------------------------------------------------------*/
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static int
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read_temp(int32_t *value)
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{
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#ifdef IPSO_TEMPERATURE
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int32_t temp;
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if(IPSO_TEMPERATURE.read_value == NULL ||
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IPSO_TEMPERATURE.read_value(&temp) != 0) {
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return 0;
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}
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/* Convert milliCelsius to fix float */
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*value = (temp * LWM2M_FLOAT32_FRAC) / 1000;
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if(*value < min_temp) {
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min_temp = *value;
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lwm2m_object_notify_observers(&temperature, "/0/5601");
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}
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if(*value > max_temp) {
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max_temp = *value;
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lwm2m_object_notify_observers(&temperature, "/0/5602");
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}
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return 1;
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#else /* IPSO_TEMPERATURE */
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return 0;
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#endif /* IPSO_TEMPERATURE */
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}
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/*---------------------------------------------------------------------------*/
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static void
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handle_periodic_timer(void *ptr)
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{
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static int32_t last_value = IPSO_TEMPERATURE_MIN;
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int32_t v;
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/* Only notify when the value has changed since last */
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if(read_temp(&v) && v != last_value) {
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last_value = v;
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lwm2m_object_notify_observers(&temperature, "/0/5700");
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}
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ctimer_reset(&periodic_timer);
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}
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/*---------------------------------------------------------------------------*/
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void
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ipso_temperature_init(void)
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{
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int32_t v;
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min_temp = IPSO_TEMPERATURE_MAX;
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max_temp = IPSO_TEMPERATURE_MIN;
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#ifdef IPSO_TEMPERATURE
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if(IPSO_TEMPERATURE.init) {
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IPSO_TEMPERATURE.init();
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}
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#endif /* IPSO_TEMPERATURE */
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/* register this device and its handlers - the handlers automatically
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sends in the object to handle */
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lwm2m_engine_register_object(&temperature);
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/* update temp and min/max + notify any listeners */
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read_temp(&v);
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ctimer_set(&periodic_timer, CLOCK_SECOND * 10, handle_periodic_timer, NULL);
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}
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/*---------------------------------------------------------------------------*/
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/** @} */
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