164 lines
5.3 KiB
C
164 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 button as a digital input
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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 "contiki.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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#define DEBUG 0
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#if DEBUG
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#include <stdio.h>
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#define PRINTF(...) printf(__VA_ARGS__)
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#else
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#define PRINTF(...)
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#endif
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#if PLATFORM_HAS_BUTTON
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#include "dev/button-sensor.h"
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PROCESS(ipso_button_process, "ipso-button");
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#endif /* PLATFORM_HAS_BUTTON */
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static int input_state = 0;
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static int polarity = 0;
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static int32_t counter = 0;
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static int32_t edge_selection = 3;
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static int32_t debounce_time = 10;
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/*---------------------------------------------------------------------------*/
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static int
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read_state(lwm2m_context_t *ctx, uint8_t *outbuf, size_t outsize)
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{
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int value;
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if(polarity == 0) {
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value = input_state ? 1 : 0;
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} else {
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value = input_state ? 0 : 1;
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}
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PRINTF("Read button state (polarity=%d, state=%d): %d\n",
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polarity, input_state, value);
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return ctx->writer->write_boolean(ctx, outbuf, outsize, value);
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}
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/*---------------------------------------------------------------------------*/
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static int
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reset_counter(lwm2m_context_t *ctx, const uint8_t *arg, size_t len,
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uint8_t *outbuf, size_t outlen)
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{
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counter = 0;
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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LWM2M_RESOURCES(button_resources,
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LWM2M_RESOURCE_CALLBACK(5500, { read_state, NULL, NULL }),
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LWM2M_RESOURCE_INTEGER_VAR(5501, &counter),
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LWM2M_RESOURCE_BOOLEAN_VAR(5502, &polarity),
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LWM2M_RESOURCE_INTEGER_VAR(5503, &debounce_time),
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LWM2M_RESOURCE_INTEGER_VAR(5504, &edge_selection),
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LWM2M_RESOURCE_CALLBACK(5505, { NULL, NULL, reset_counter }),
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LWM2M_RESOURCE_STRING(5751, "Button")
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);
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LWM2M_INSTANCES(button_instances,
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LWM2M_INSTANCE(0, button_resources));
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LWM2M_OBJECT(button, 3200, button_instances);
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/*---------------------------------------------------------------------------*/
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void
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ipso_button_init(void)
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{
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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(&button);
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#if PLATFORM_HAS_BUTTON
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process_start(&ipso_button_process, NULL);
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#endif /* PLATFORM_HAS_BUTTON */
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}
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/*---------------------------------------------------------------------------*/
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#if PLATFORM_HAS_BUTTON
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PROCESS_THREAD(ipso_button_process, ev, data)
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{
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static struct etimer timer;
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int32_t time;
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PROCESS_BEGIN();
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SENSORS_ACTIVATE(button_sensor);
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while(1) {
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PROCESS_WAIT_EVENT();
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if(ev == sensors_event && data == &button_sensor) {
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if(!input_state) {
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input_state = 1;
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counter++;
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if((edge_selection & 2) != 0) {
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lwm2m_object_notify_observers(&button, "/0/5500");
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}
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lwm2m_object_notify_observers(&button, "/0/5501");
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time = (debounce_time * CLOCK_SECOND / 1000);
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if(time < 1) {
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time = 1;
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}
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etimer_set(&timer, (clock_time_t)time);
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}
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} else if(ev == PROCESS_EVENT_TIMER && data == &timer) {
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if(!input_state) {
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/* Button is not in pressed state */
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} else if(button_sensor.value(0) != 0) {
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/* Button is still pressed */
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etimer_reset(&timer);
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} else {
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input_state = 0;
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if((edge_selection & 1) != 0) {
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lwm2m_object_notify_observers(&button, "/0/5500");
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}
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}
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}
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}
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PROCESS_END();
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}
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#endif /* PLATFORM_HAS_BUTTON */
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/*---------------------------------------------------------------------------*/
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/** @} */
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