osd-contiki/examples/avr-rss2/ipv6/dc-rpl-coap/resources/res-dc-status-obs.c

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/*
* Copyright (c) 2015, ICT/COS/NSLab, KTH Royal Institute of Technology
* 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
* dcdc/status read-only parameters for power monitoring
* \author
* Voravit Tanyingyong <voravit@kth.se>
*/
#include <stdio.h>
#include <string.h>
#include "rest-engine.h"
#include "er-coap.h"
#include "er-coap-observe.h"
#include "../er-dc-test.h"
#if PLATFORM_HAS_LEDS
#include "dev/leds.h"
#endif
#include "dev/dc-status-sensor.h"
static void res_dc_status_obs_get_handler(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset);
static void res_dc_status_obs_periodic_handler(void);
PERIODIC_RESOURCE(res_dc_status_obs, "title=\"status parameters\"", res_dc_status_obs_get_handler, NULL, NULL, NULL, 10 * CLOCK_SECOND, res_dc_status_obs_periodic_handler);
static uint32_t observe = 0;
static count = 0;
/*---------------------------------------------------------------------------*/
static void
res_dc_status_obs_get_handler(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset)
{
int vout_value = dc_status_sensor.value(0);
int vin_value = dc_status_sensor.value(1);
int iout_value = dc_status_sensor.value(2);
int iin_value = dc_status_sensor.value(3);
/* a request comes from a remote host */
if(request != NULL) {
#if PLATFORM_HAS_LEDS
/* set red led when receiving a packet */
leds_on(LEDS_RED);
#endif
coap_packet_t *const coap_req = (coap_packet_t *)request;
PRINTF("dcdc/status GET (%s %u)\n", coap_req->type == COAP_TYPE_CON ? "CON" : "NON", coap_req->mid);
/* if comes with observe then register it */
if(coap_get_header_observe(request, &observe)) {
/* PRINTF("OBSERVE set\n"); */
/* respond with empty ack */
REST.set_header_content_type(response, observe);
REST.set_response_payload(response, 0, 0);
} else { /* if no observe option, then answer to GET request as normal */
/* PRINTF("OBSERVE NOT set\n"); */
REST.set_header_content_type(response, REST.type.TEXT_PLAIN);
REST.set_response_payload(
response,
buffer,
snprintf((char *)buffer, MAX_COAP_PAYLOAD, "ST\tON\nVO\t%d.000\nIO\t%d.000\nVI\t%d.000\nII\t%d.000\n", vout_value, iout_value, vin_value, iin_value));
}
} else { /* this is a notification: need to set payload */
/* PRINTF("NULL REQUEST = PERIODIC\n"); */
REST.set_response_payload(
response,
buffer,
snprintf((char *)buffer, MAX_COAP_PAYLOAD, "ST\tON\nVO\t%d.000\nIO\t%d.000\nVI\t%d.000\nII\t%d.000\n", vout_value, iout_value, vin_value, iin_value));
}
count++;
printf("PERIODIC %d: ST:ON VO:%d IO:%d VI:%d II:%d\n", count, vout_value, iout_value, vin_value, iin_value);
#if PLATFORM_HAS_LEDS
/* set yellow led when sending packet */
leds_on(LEDS_YELLOW);
#endif
}
/*---------------------------------------------------------------------------*/
static void
res_dc_status_obs_periodic_handler()
{
/* send periodic notification to the observers */
REST.notify_subscribers(&res_dc_status_obs);
}