nes-proj/os/services/ipso-objects/ipso-sensor-template.c
2018-01-12 01:18:41 +01:00

240 lines
7.8 KiB
C

/*
* Copyright (c) 2016, SICS Swedish ICT AB
* 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 copyright holder 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 COPYRIGHT HOLDER 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
* COPYRIGHT HOLDER 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.
*/
/**
* \addtogroup ipso-objects
* @{
*
*/
/**
* \file
* Implementation of OMA LWM2M / IPSO sensor template.
* \author
* Joakim Eriksson <joakime@sics.se>
* Niclas Finne <nfi@sics.se>
*/
#include "ipso-sensor-template.h"
#include "lwm2m-engine.h"
#include <string.h>
#include <stdio.h>
#define IPSO_SENSOR_VALUE 5700
#define IPSO_SENSOR_UNIT 5701
#define IPSO_SENSOR_MIN_VALUE 5601
#define IPSO_SENSOR_MAX_VALUE 5602
#define IPSO_SENSOR_MIN_RANGE 5603
#define IPSO_SENSOR_MAX_RANGE 5604
#define IPSO_SENSOR_RESET_MINMAX 5605
static const lwm2m_resource_id_t resources[] =
{
RO(IPSO_SENSOR_VALUE), RO(IPSO_SENSOR_UNIT),
RO(IPSO_SENSOR_MIN_VALUE), RO(IPSO_SENSOR_MAX_VALUE),
RO(IPSO_SENSOR_MIN_RANGE), RO(IPSO_SENSOR_MAX_RANGE),
EX(IPSO_SENSOR_RESET_MINMAX)
};
/*---------------------------------------------------------------------------*/
static void update_last_value(ipso_sensor_value_t *sval, int32_t value,
uint8_t notify);
/*---------------------------------------------------------------------------*/
static int init = 0;
static coap_timer_t nt;
/* Currently support max 4 periodic sensors */
#define MAX_PERIODIC 4
struct periodic_sensor {
ipso_sensor_value_t *value;
uint16_t ticks_left;
} periodics[MAX_PERIODIC];
static void
timer_callback(coap_timer_t *timer)
{
int i;
coap_timer_reset(timer, 1000);
for(i = 0; i < MAX_PERIODIC; i++) {
if(periodics[i].value != NULL) {
if(periodics[i].ticks_left > 0) {
periodics[i].ticks_left--;
} else {
int32_t value;
periodics[i].ticks_left = periodics[i].value->sensor->update_interval;
if(periodics[i].value->sensor->get_value_in_millis(periodics[i].value->sensor, &value) == LWM2M_STATUS_OK) {
update_last_value(periodics[i].value, value, 1);
}
}
}
}
}
static void
add_periodic(const ipso_sensor_t *sensor)
{
int i;
for(i = 0; i < MAX_PERIODIC; i++) {
if(periodics[i].value == NULL) {
periodics[i].value = sensor->sensor_value;
periodics[i].ticks_left = sensor->update_interval;
return;
}
}
}
/*---------------------------------------------------------------------------*/
static void
update_last_value(ipso_sensor_value_t *sval, int32_t value, uint8_t notify)
{
/* No notification if this a regular read that cause the update */
if(sval->last_value != value && notify) {
lwm2m_notify_object_observers(&sval->reg_object, IPSO_SENSOR_VALUE);
}
sval->last_value = value;
if(sval->min_value > value) {
sval->min_value = value;
lwm2m_notify_object_observers(&sval->reg_object, IPSO_SENSOR_MIN_VALUE);
}
if(sval->max_value < value) {
sval->max_value = value;
lwm2m_notify_object_observers(&sval->reg_object, IPSO_SENSOR_MAX_VALUE);
}
}
/*---------------------------------------------------------------------------*/
static inline size_t
write_float32fix(lwm2m_context_t *ctx, int32_t value)
{
int64_t tmp = value;
tmp = (tmp * 1024) / 1000;
return lwm2m_object_write_float32fix(ctx, (int32_t)tmp, 10);
}
/*---------------------------------------------------------------------------*/
static lwm2m_status_t
lwm2m_callback(lwm2m_object_instance_t *object,
lwm2m_context_t *ctx)
{
/* Here we cast to our sensor-template struct */
const ipso_sensor_t *sensor;
ipso_sensor_value_t *value;
value = (ipso_sensor_value_t *) object;
sensor = value->sensor;
/* Do the stuff */
if(ctx->level == 1) {
/* Should not happen 3303 */
return LWM2M_STATUS_ERROR;
}
if(ctx->level == 2) {
/* This is a get whole object - or write whole object 3303/0 */
return LWM2M_STATUS_ERROR;
}
if(ctx->level == 3) {
/* This is a get request on 3303/0/3700 */
/* NOW we assume a get.... which might be wrong... */
if(ctx->operation == LWM2M_OP_READ) {
switch(ctx->resource_id) {
case IPSO_SENSOR_UNIT:
if(sensor->unit != NULL) {
lwm2m_object_write_string(ctx, sensor->unit, strlen(sensor->unit));
}
break;
case IPSO_SENSOR_MAX_RANGE:
write_float32fix(ctx, sensor->max_range);
break;
case IPSO_SENSOR_MIN_RANGE:
write_float32fix(ctx, sensor->min_range);
break;
case IPSO_SENSOR_MAX_VALUE:
write_float32fix(ctx, value->max_value);
break;
case IPSO_SENSOR_MIN_VALUE:
write_float32fix(ctx, value->min_value);
break;
case IPSO_SENSOR_VALUE:
if(sensor->get_value_in_millis != NULL) {
int32_t v;
if(sensor->get_value_in_millis(sensor, &v) == LWM2M_STATUS_OK) {
update_last_value(value, v, 0);
write_float32fix(ctx, value->last_value);
}
}
break;
default:
return LWM2M_STATUS_ERROR;
}
} else if(ctx->operation == LWM2M_OP_EXECUTE) {
if(ctx->resource_id == IPSO_SENSOR_RESET_MINMAX) {
value->min_value = value->last_value;
value->max_value = value->last_value;
}
}
}
return LWM2M_STATUS_OK;
}
/*---------------------------------------------------------------------------*/
int
ipso_sensor_add(const ipso_sensor_t *sensor)
{
if(sensor->update_interval > 0) {
if(init == 0) {
coap_timer_set_callback(&nt, timer_callback);
coap_timer_set(&nt, 1000);
init = 1;
}
add_periodic(sensor);
}
if(sensor->sensor_value == NULL) {
return 0;
}
sensor->sensor_value->reg_object.object_id = sensor->object_id;
sensor->sensor_value->sensor = sensor;
if(sensor->instance_id == 0) {
sensor->sensor_value->reg_object.instance_id = LWM2M_OBJECT_INSTANCE_NONE;
} else {
sensor->sensor_value->reg_object.instance_id = sensor->instance_id;
}
sensor->sensor_value->reg_object.callback = lwm2m_callback;
sensor->sensor_value->reg_object.resource_ids = resources;
sensor->sensor_value->reg_object.resource_count =
sizeof(resources) / sizeof(lwm2m_resource_id_t);
return lwm2m_engine_add_object(&sensor->sensor_value->reg_object);
}
/*---------------------------------------------------------------------------*/
int
ipso_sensor_remove(const ipso_sensor_t *sensor)
{
lwm2m_engine_remove_object(&sensor->sensor_value->reg_object);
return 1;
}
/*---------------------------------------------------------------------------*/
/** @} */