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Implementation of OMA LWM2M Engine / IPSO Objects

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Niclas Finne 2015-12-01 04:14:46 +01:00
parent 35fb0614de
commit 3dd11603a7
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apps/ipso-objects/ipso-button.c Normal file
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/*
* Copyright (c) 2015, Yanzi Networks 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 button as a digital input
* \author
* Joakim Eriksson <joakime@sics.se>
* Niclas Finne <nfi@sics.se>
*/
#include "contiki.h"
#include "lwm2m-object.h"
#include "lwm2m-engine.h"
#include "er-coap-engine.h"
#define DEBUG 0
#if DEBUG
#include <stdio.h>
#define PRINTF(...) printf(__VA_ARGS__)
#else
#define PRINTF(...)
#endif
#if PLATFORM_HAS_BUTTON
#include "dev/button-sensor.h"
PROCESS(ipso_button_process, "ipso-button");
#endif /* PLATFORM_HAS_BUTTON */
static int input_state = 0;
static int polarity = 0;
static int32_t counter = 0;
static int32_t edge_selection = 3;
static int32_t debounce_time = 10;
/*---------------------------------------------------------------------------*/
static int
read_state(lwm2m_context_t *ctx, uint8_t *outbuf, size_t outsize)
{
int value;
if(polarity == 0) {
value = input_state ? 1 : 0;
} else {
value = input_state ? 0 : 1;
}
PRINTF("Read button state (polarity=%d, state=%d): %d\n",
polarity, input_state, value);
return ctx->writer->write_boolean(ctx, outbuf, outsize, value);
}
/*---------------------------------------------------------------------------*/
static int
reset_counter(lwm2m_context_t *ctx, const uint8_t *arg, size_t len,
uint8_t *outbuf, size_t outlen)
{
counter = 0;
return 0;
}
/*---------------------------------------------------------------------------*/
LWM2M_RESOURCES(button_resources,
LWM2M_RESOURCE_CALLBACK(5500, { read_state, NULL, NULL }),
LWM2M_RESOURCE_INTEGER_VAR(5501, &counter),
LWM2M_RESOURCE_BOOLEAN_VAR(5502, &polarity),
LWM2M_RESOURCE_INTEGER_VAR(5503, &debounce_time),
LWM2M_RESOURCE_INTEGER_VAR(5504, &edge_selection),
LWM2M_RESOURCE_CALLBACK(5505, { NULL, NULL, reset_counter }),
LWM2M_RESOURCE_STRING(5751, "Button")
);
LWM2M_INSTANCES(button_instances,
LWM2M_INSTANCE(0, button_resources));
LWM2M_OBJECT(button, 3200, button_instances);
/*---------------------------------------------------------------------------*/
void
ipso_button_init(void)
{
/* register this device and its handlers - the handlers automatically
sends in the object to handle */
lwm2m_engine_register_object(&button);
#if PLATFORM_HAS_BUTTON
process_start(&ipso_button_process, NULL);
#endif /* PLATFORM_HAS_BUTTON */
}
/*---------------------------------------------------------------------------*/
#if PLATFORM_HAS_BUTTON
PROCESS_THREAD(ipso_button_process, ev, data)
{
static struct etimer timer;
int32_t time;
PROCESS_BEGIN();
SENSORS_ACTIVATE(button_sensor);
while(1) {
PROCESS_WAIT_EVENT();
if(ev == sensors_event && data == &button_sensor) {
if(!input_state) {
input_state = 1;
counter++;
if((edge_selection & 2) != 0) {
lwm2m_object_notify_observers(&button, "/0/5500");
}
lwm2m_object_notify_observers(&button, "/0/5501");
time = (debounce_time * CLOCK_SECOND / 1000);
if(time < 1) {
time = 1;
}
etimer_set(&timer, (clock_time_t)time);
}
} else if(ev == PROCESS_EVENT_TIMER && data == &timer) {
if(!input_state) {
/* Button is not in pressed state */
} else if(button_sensor.value(0) != 0) {
/* Button is still pressed */
etimer_reset(&timer);
} else {
input_state = 0;
if((edge_selection & 1) != 0) {
lwm2m_object_notify_observers(&button, "/0/5500");
}
}
}
}
PROCESS_END();
}
#endif /* PLATFORM_HAS_BUTTON */
/*---------------------------------------------------------------------------*/
/** @} */