/*
* 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 Light Control for LEDs
* \author
* Joakim Eriksson <joakime@sics.se>
* Niclas Finne <nfi@sics.se>
*/
#include "lwm2m-object.h"
#include "lwm2m-engine.h"
#include "er-coap-engine.h"
#include "dev/leds.h"
#include <stdint.h>
#define DEBUG 0
#if DEBUG
#include <stdio.h>
#define PRINTF(...) printf(__VA_ARGS__)
#else
#define PRINTF(...)
#endif
#if LEDS_ALL & LEDS_BLUE || LEDS_ALL & LEDS_RED || LEDS_ALL & LEDS_BLUE
#define LEDS_CONTROL_NUMBER (((LEDS_ALL & LEDS_BLUE) ? 1 : 0) + ((LEDS_ALL & LEDS_RED) ? 1 : 0) + ((LEDS_ALL & LEDS_GREEN) ? 1 : 0))
#else
#define LEDS_CONTROL_NUMBER 1
#endif
struct led_state {
unsigned long last_on_time;
uint32_t total_on_time;
uint8_t is_on;
uint8_t led_value;
};
static struct led_state states[LEDS_CONTROL_NUMBER];
static lwm2m_instance_t leds_control_instances[LEDS_CONTROL_NUMBER];
/*---------------------------------------------------------------------------*/
static int
read_state(lwm2m_context_t *ctx, uint8_t *outbuf, size_t outsize)
{
uint8_t idx = ctx->object_instance_index;
if(idx >= LEDS_CONTROL_NUMBER) {
return 0;
}
return ctx->writer->write_boolean(ctx, outbuf, outsize,
states[idx].is_on ? 1 : 0);
}
/*---------------------------------------------------------------------------*/
static int
write_state(lwm2m_context_t *ctx, const uint8_t *inbuf, size_t insize,
uint8_t *outbuf, size_t outsize)
{
int value;
size_t len;
uint8_t idx = ctx->object_instance_index;
if(idx >= LEDS_CONTROL_NUMBER) {
return 0;
}
len = ctx->reader->read_boolean(ctx, inbuf, insize, &value);
if(len > 0) {
if(value) {
if(!states[idx].is_on) {
states[idx].is_on = 1;
states[idx].last_on_time = clock_seconds();
#if PLATFORM_HAS_LEDS
leds_on(states[idx].led_value);
#endif /* PLATFORM_HAS_LEDS */
}
} else if(states[idx].is_on) {
states[idx].total_on_time += clock_seconds() - states[idx].last_on_time;
states[idx].is_on = 0;
#if PLATFORM_HAS_LEDS
leds_off(states[idx].led_value);
#endif /* PLATFORM_HAS_LEDS */
}
} else {
PRINTF("IPSO leds control - ignored illegal write to on/off\n");
}
return len;
}
/*---------------------------------------------------------------------------*/
static char *
get_color(int value) {
switch(value) {
case LEDS_GREEN:
return "Green";
case LEDS_RED:
return "Red";
case LEDS_BLUE:
return "Blue";
}
return "None";
}
static int
read_color(lwm2m_context_t *ctx, uint8_t *outbuf, size_t outsize)
{
char *value;
uint8_t idx = ctx->object_instance_index;
if(idx >= LEDS_CONTROL_NUMBER) {
return 0;
}
value = get_color(states[idx].led_value);
return ctx->writer->write_string(ctx, outbuf, outsize,
value, strlen(value));
}
/*---------------------------------------------------------------------------*/
static int
read_on_time(lwm2m_context_t *ctx, uint8_t *outbuf, size_t outsize)
{
unsigned long now;
uint8_t idx = ctx->object_instance_index;
if(idx >= LEDS_CONTROL_NUMBER) {
return 0;
}
if(states[idx].is_on) {
/* Update the on time */
now = clock_seconds();
states[idx].total_on_time += now - states[idx].last_on_time;
states[idx].last_on_time = now;
}
return ctx->writer->write_int(ctx, outbuf, outsize,
(int32_t)states[idx].total_on_time);
}
/*---------------------------------------------------------------------------*/
static int
write_on_time(lwm2m_context_t *ctx,
const uint8_t *inbuf, size_t insize,
uint8_t *outbuf, size_t outsize)
{
int32_t value;
size_t len;
uint8_t idx = ctx->object_instance_index;
if(idx >= LEDS_CONTROL_NUMBER) {
return 0;
}
len = ctx->reader->read_int(ctx, inbuf, insize, &value);
if(len > 0 && value == 0) {
PRINTF("IPSO leds control - reset On Time\n");
states[idx].total_on_time = 0;
if(states[idx].is_on) {
states[idx].last_on_time = clock_seconds();
}
} else {
PRINTF("IPSO leds control - ignored illegal write to On Time\n");
}
return len;
}
/*---------------------------------------------------------------------------*/
LWM2M_RESOURCES(leds_control_resources,
LWM2M_RESOURCE_CALLBACK(5850, { read_state, write_state, NULL }),
LWM2M_RESOURCE_CALLBACK(5706, { read_color, NULL, NULL }),
LWM2M_RESOURCE_CALLBACK(5852, { read_on_time, write_on_time, NULL })
);
LWM2M_OBJECT(leds_control, 3311, leds_control_instances);
/*---------------------------------------------------------------------------*/
static int
bit_no(int bit)
{
int i;
for(i = 0; i < 8; i++) {
if(LEDS_ALL & (1 << i)) {
if(bit == 0) {
/* matching bit */
return 1 << i;
} else {
/* matching but used */
bit--;
}
}
}
return 0;
}
void
ipso_leds_control_init(void)
{
lwm2m_instance_t template = LWM2M_INSTANCE(0, leds_control_resources);
int i;
/* Initialize the instances */
for(i = 0; i < LEDS_CONTROL_NUMBER; i++) {
leds_control_instances[i] = template;
leds_control_instances[i].id = i;
states[i].led_value = bit_no(i);
}
/* register this device and its handlers - the handlers automatically
sends in the object to handle */
lwm2m_engine_register_object(&leds_control);
PRINTF("IPSO leds control initialized with %u instances\n",
LEDS_CONTROL_NUMBER);
}
/*---------------------------------------------------------------------------*/
/** @} */