nes-proj/os/services/ipso-objects/ipso-button.c

216 lines
6.5 KiB
C

/*
* 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
* NOTE: only works with a Contiki Button Sensor (not for Standalone)
* \author
* Joakim Eriksson <joakime@sics.se>
* Niclas Finne <nfi@sics.se>
*/
#include "contiki.h"
#include "lwm2m-object.h"
#include "lwm2m-engine.h"
#define DEBUG 0
#if DEBUG
#include <stdio.h>
#define PRINTF(...) printf(__VA_ARGS__)
#else
#define PRINTF(...)
#endif
#define IPSO_INPUT_STATE 5500
#define IPSO_INPUT_COUNTER 5501
#define IPSO_INPUT_POLARITY 5502
#define IPSO_INPUT_DEBOUNCE 5503
#define IPSO_INPUT_EDGE_SEL 5504
#define IPSO_INPUT_CTR_RESET 5505
#define IPSO_INPUT_SENSOR_TYPE 5751
#if PLATFORM_HAS_BUTTON
#include "dev/button-sensor.h"
#if BOARD_SENSORTAG
#include "sensortag/button-sensor.h"
#define IPSO_BUTTON_SENSOR button_left_sensor
#else
#define IPSO_BUTTON_SENSOR button_sensor
#endif
PROCESS(ipso_button_process, "ipso-button");
#endif /* PLATFORM_HAS_BUTTON */
static lwm2m_status_t lwm2m_callback(lwm2m_object_instance_t *object,
lwm2m_context_t *ctx);
static int input_state = 0;
static int polarity = 0;
static int32_t counter = 0;
static int32_t edge_selection = 3; /* both */
static int32_t debounce_time = 10;
static const lwm2m_resource_id_t resources[] = {
RO(IPSO_INPUT_STATE), RO(IPSO_INPUT_COUNTER), RW(IPSO_INPUT_POLARITY),
RW(IPSO_INPUT_DEBOUNCE), RW(IPSO_INPUT_EDGE_SEL), EX(IPSO_INPUT_CTR_RESET),
RO(IPSO_INPUT_SENSOR_TYPE)
};
/* Only support for one button for now */
static lwm2m_object_instance_t reg_object = {
.object_id = 3200,
.instance_id = 0,
.resource_ids = resources,
.resource_count = sizeof(resources) / sizeof(lwm2m_resource_id_t),
.callback = lwm2m_callback,
};
/*---------------------------------------------------------------------------*/
static int
read_state(void)
{
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 value;
}
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
static lwm2m_status_t
lwm2m_callback(lwm2m_object_instance_t *object,
lwm2m_context_t *ctx)
{
if(ctx->operation == LWM2M_OP_READ) {
switch(ctx->resource_id) {
case IPSO_INPUT_STATE:
lwm2m_object_write_int(ctx, read_state());
break;
case IPSO_INPUT_COUNTER:
lwm2m_object_write_int(ctx, counter);
break;
case IPSO_INPUT_POLARITY:
lwm2m_object_write_int(ctx, polarity);
break;
case IPSO_INPUT_DEBOUNCE:
lwm2m_object_write_int(ctx, debounce_time);
break;
case IPSO_INPUT_EDGE_SEL:
lwm2m_object_write_int(ctx, edge_selection);
break;
case IPSO_INPUT_SENSOR_TYPE:
lwm2m_object_write_string(ctx, "button", strlen("button"));
break;
default:
return LWM2M_STATUS_ERROR;
}
} else if(ctx->operation == LWM2M_OP_EXECUTE) {
if(ctx->resource_id == IPSO_INPUT_CTR_RESET) {
counter = 0;
} else {
return LWM2M_STATUS_ERROR;
}
}
return LWM2M_STATUS_OK;
}
/*---------------------------------------------------------------------------*/
void
ipso_button_init(void)
{
/* register this device and its handlers - the handlers automatically
sends in the object to handle */
lwm2m_engine_add_object(&reg_object);
#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(IPSO_BUTTON_SENSOR);
while(1) {
PROCESS_WAIT_EVENT();
if(ev == sensors_event && data == &IPSO_BUTTON_SENSOR) {
if(!input_state) {
input_state = 1;
counter++;
if((edge_selection & 2) != 0) {
lwm2m_notify_object_observers(&reg_object, IPSO_INPUT_STATE);
}
lwm2m_notify_object_observers(&reg_object, IPSO_INPUT_COUNTER);
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(IPSO_BUTTON_SENSOR.value(0) != 0) {
/* Button is still pressed */
etimer_reset(&timer);
} else {
input_state = 0;
if((edge_selection & 1) != 0) {
lwm2m_notify_object_observers(&reg_object, IPSO_INPUT_STATE);
}
}
}
}
PROCESS_END();
}
#endif /* PLATFORM_HAS_BUTTON */
/*---------------------------------------------------------------------------*/
/** @} */