nes-proj/examples/cc26xx/very-sleepy-demo/very-sleepy-demo.c

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/*
* Copyright (c) 2014, Texas Instruments Incorporated - http://www.ti.com/
* 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 HOLDERS 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.
*/
/*---------------------------------------------------------------------------*/
#include "contiki.h"
#include "sys/etimer.h"
#include "sys/stimer.h"
#include "sys/process.h"
#include "dev/leds.h"
#include "dev/watchdog.h"
#include "button-sensor.h"
#include "batmon-sensor.h"
#include "board-peripherals.h"
#include "net/netstack.h"
#include "net/ipv6/uip-ds6-nbr.h"
#include "net/ipv6/uip-ds6-route.h"
#include "net/rpl/rpl.h"
#include "net/rpl/rpl-private.h"
#include "rest-engine.h"
#include "er-coap.h"
#include "ti-lib.h"
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
/*---------------------------------------------------------------------------*/
/* Normal mode duration params in seconds */
#define NORMAL_OP_DURATION_DEFAULT 10
#define NORMAL_OP_DURATION_MIN 10
#define NORMAL_OP_DURATION_MAX 60
/*---------------------------------------------------------------------------*/
/* Observer notification period params in seconds */
#define PERIODIC_INTERVAL_DEFAULT 30
#define PERIODIC_INTERVAL_MIN 30
#define PERIODIC_INTERVAL_MAX 86400 /* 1 day */
/*---------------------------------------------------------------------------*/
#define VERY_SLEEPY_MODE_OFF 0
#define VERY_SLEEPY_MODE_ON 1
/*---------------------------------------------------------------------------*/
#define MAC_CAN_BE_TURNED_OFF 0
#define MAC_MUST_STAY_ON 1
#define KEEP_MAC_ON_MIN_PERIOD 10 /* secs */
/*---------------------------------------------------------------------------*/
#define PERIODIC_INTERVAL CLOCK_SECOND
/*---------------------------------------------------------------------------*/
#define POST_STATUS_BAD 0x80
#define POST_STATUS_HAS_MODE 0x40
#define POST_STATUS_HAS_DURATION 0x20
#define POST_STATUS_HAS_INTERVAL 0x10
#define POST_STATUS_NONE 0x00
/*---------------------------------------------------------------------------*/
typedef struct sleepy_config_s {
unsigned long interval;
unsigned long duration;
uint8_t mode;
} sleepy_config_t;
sleepy_config_t config;
/*---------------------------------------------------------------------------*/
#define STATE_NORMAL 0
#define STATE_NOTIFY_OBSERVERS 1
#define STATE_VERY_SLEEPY 2
/*---------------------------------------------------------------------------*/
static struct stimer st_duration;
static struct stimer st_interval;
static struct stimer st_min_mac_on_duration;
static struct etimer et_periodic;
static process_event_t event_new_config;
static uint8_t state;
/*---------------------------------------------------------------------------*/
const char *not_supported_msg = "Supported:text/plain,application/json";
/*---------------------------------------------------------------------------*/
PROCESS(very_sleepy_demo_process, "CC13xx/CC26xx very sleepy process");
AUTOSTART_PROCESSES(&very_sleepy_demo_process);
/*---------------------------------------------------------------------------*/
static void
readings_get_handler(void *request, void *response, uint8_t *buffer,
uint16_t preferred_size, int32_t *offset)
{
unsigned int accept = -1;
int temp;
int voltage;
if(request != NULL) {
REST.get_header_accept(request, &accept);
}
temp = batmon_sensor.value(BATMON_SENSOR_TYPE_TEMP);
voltage = batmon_sensor.value(BATMON_SENSOR_TYPE_VOLT);
if(accept == -1 || accept == REST.type.APPLICATION_JSON) {
REST.set_header_content_type(response, REST.type.APPLICATION_JSON);
snprintf((char *)buffer, REST_MAX_CHUNK_SIZE,
"{\"temp\":{\"v\":%d,\"u\":\"C\"},"
"\"voltage\":{\"v\":%d,\"u\":\"mV\"}}",
temp, (voltage * 125) >> 5);
REST.set_response_payload(response, buffer, strlen((char *)buffer));
} else if(accept == REST.type.TEXT_PLAIN) {
REST.set_header_content_type(response, REST.type.TEXT_PLAIN);
snprintf((char *)buffer, REST_MAX_CHUNK_SIZE, "Temp=%dC, Voltage=%dmV",
temp, (voltage * 125) >> 5);
REST.set_response_payload(response, buffer, strlen((char *)buffer));
} else {
REST.set_response_status(response, REST.status.NOT_ACCEPTABLE);
REST.set_response_payload(response, not_supported_msg,
strlen(not_supported_msg));
}
}
/*---------------------------------------------------------------------------*/
RESOURCE(readings_resource, "title=\"Sensor Readings\";obs",
readings_get_handler, NULL, NULL, NULL);
/*---------------------------------------------------------------------------*/
static void
conf_get_handler(void *request, void *response, uint8_t *buffer,
uint16_t preferred_size, int32_t *offset)
{
unsigned int accept = -1;
if(request != NULL) {
REST.get_header_accept(request, &accept);
}
if(accept == -1 || accept == REST.type.APPLICATION_JSON) {
REST.set_header_content_type(response, REST.type.APPLICATION_JSON);
snprintf((char *)buffer, REST_MAX_CHUNK_SIZE,
"{\"config\":{\"mode\":%u,\"duration\":%lu,\"interval\":%lu}}",
config.mode, config.duration, config.interval);
REST.set_response_payload(response, buffer, strlen((char *)buffer));
} else if(accept == REST.type.TEXT_PLAIN) {
REST.set_header_content_type(response, REST.type.TEXT_PLAIN);
snprintf((char *)buffer, REST_MAX_CHUNK_SIZE,
"Mode=%u, Duration=%lusecs, Interval=%lusecs",
config.mode, config.duration, config.interval);
REST.set_response_payload(response, buffer, strlen((char *)buffer));
} else {
REST.set_response_status(response, REST.status.NOT_ACCEPTABLE);
REST.set_response_payload(response, not_supported_msg,
strlen(not_supported_msg));
}
}
/*---------------------------------------------------------------------------*/
static void
conf_post_handler(void *request, void *response, uint8_t *buffer,
uint16_t preferred_size, int32_t *offset)
{
const char *ptr = NULL;
char tmp_buf[16];
unsigned long interval = 0;
unsigned long duration = 0;
uint8_t mode = VERY_SLEEPY_MODE_OFF;
uint8_t post_status = POST_STATUS_NONE;
int rv;
rv = REST.get_post_variable(request, "mode", &ptr);
if(rv && rv < 16) {
memset(tmp_buf, 0, sizeof(tmp_buf));
memcpy(tmp_buf, ptr, rv);
rv = atoi(tmp_buf);
if(rv == 1) {
mode = VERY_SLEEPY_MODE_ON;
post_status |= POST_STATUS_HAS_MODE;
} else if(rv == 0) {
mode = VERY_SLEEPY_MODE_OFF;
post_status |= POST_STATUS_HAS_MODE;
} else {
post_status = POST_STATUS_BAD;
}
}
rv = REST.get_post_variable(request, "duration", &ptr);
if(rv && rv < 16) {
memset(tmp_buf, 0, sizeof(tmp_buf));
memcpy(tmp_buf, ptr, rv);
rv = atoi(tmp_buf);
duration = (unsigned long)rv;
if(duration < NORMAL_OP_DURATION_MIN || duration > NORMAL_OP_DURATION_MAX) {
post_status = POST_STATUS_BAD;
} else {
post_status |= POST_STATUS_HAS_DURATION;
}
}
rv = REST.get_post_variable(request, "interval", &ptr);
if(rv && rv < 16) {
memset(tmp_buf, 0, sizeof(tmp_buf));
memcpy(tmp_buf, ptr, rv);
rv = atoi(tmp_buf);
interval = (unsigned long)rv;
if(interval < PERIODIC_INTERVAL_MIN || interval > PERIODIC_INTERVAL_MAX) {
post_status = POST_STATUS_BAD;
} else {
post_status |= POST_STATUS_HAS_INTERVAL;
}
}
if((post_status & POST_STATUS_BAD) == POST_STATUS_BAD ||
post_status == POST_STATUS_NONE) {
REST.set_response_status(response, REST.status.BAD_REQUEST);
snprintf((char *)buffer, REST_MAX_CHUNK_SIZE,
"mode=0|1&duration=[%u,%u]&interval=[%u,%u]",
NORMAL_OP_DURATION_MIN, NORMAL_OP_DURATION_MAX,
PERIODIC_INTERVAL_MIN, PERIODIC_INTERVAL_MAX);
REST.set_response_payload(response, buffer, strlen((char *)buffer));
return;
}
/* Values are sane. Update the config and notify the process */
if(post_status & POST_STATUS_HAS_MODE) {
config.mode = mode;
}
if(post_status & POST_STATUS_HAS_INTERVAL) {
config.interval = interval;
}
if(post_status & POST_STATUS_HAS_DURATION) {
config.duration = duration;
}
process_post(&very_sleepy_demo_process, event_new_config, NULL);
}
/*---------------------------------------------------------------------------*/
RESOURCE(very_sleepy_conf,
"title=\"Very sleepy conf: "
"GET|POST mode=0|1&interval=<secs>&duration=<secs>\";rt=\"Control\"",
conf_get_handler, conf_post_handler, NULL, NULL);
/*---------------------------------------------------------------------------*/
/*
* If our preferred parent is not NBR_REACHABLE in the ND cache, NUD will send
* a unicast NS and wait for NA. If NA fails then the neighbour will be removed
* from the ND cache and the default route will be deleted. To prevent this,
* keep the MAC on until the parent becomes NBR_REACHABLE. We also keep the MAC
* on if we are about to do RPL probing.
*
* In all cases, the radio will be locked on for KEEP_MAC_ON_MIN_PERIOD secs
*/
static uint8_t
keep_mac_on(void)
{
uip_ds6_nbr_t *nbr;
uint8_t rv = MAC_CAN_BE_TURNED_OFF;
if(!stimer_expired(&st_min_mac_on_duration)) {
return MAC_MUST_STAY_ON;
}
#if RPL_WITH_PROBING
/* Determine if we are about to send a RPL probe */
if(CLOCK_LT(etimer_expiration_time(
&rpl_get_default_instance()->probing_timer.etimer),
(clock_time() + PERIODIC_INTERVAL))) {
rv = MAC_MUST_STAY_ON;
}
#endif
/* It's OK to pass a NULL pointer, the callee checks and returns NULL */
nbr = uip_ds6_nbr_lookup(uip_ds6_defrt_choose());
if(nbr == NULL) {
/* We don't have a default route, or it's not reachable (NUD likely). */
rv = MAC_MUST_STAY_ON;
} else {
if(nbr->state != NBR_REACHABLE) {
rv = MAC_MUST_STAY_ON;
}
}
if(rv == MAC_MUST_STAY_ON && stimer_expired(&st_min_mac_on_duration)) {
stimer_set(&st_min_mac_on_duration, KEEP_MAC_ON_MIN_PERIOD);
}
return rv;
}
/*---------------------------------------------------------------------------*/
static void
switch_to_normal(void)
{
state = STATE_NOTIFY_OBSERVERS;
/*
* Stay in normal mode for 'duration' secs.
* Transition back to normal in 'interval' secs, _including_ 'duration'
*/
stimer_set(&st_duration, config.duration);
stimer_set(&st_interval, config.interval);
}
/*---------------------------------------------------------------------------*/
static void
switch_to_very_sleepy(void)
{
state = STATE_VERY_SLEEPY;
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(very_sleepy_demo_process, ev, data)
{
uint8_t mac_keep_on;
PROCESS_BEGIN();
SENSORS_ACTIVATE(batmon_sensor);
config.mode = VERY_SLEEPY_MODE_OFF;
config.interval = PERIODIC_INTERVAL_DEFAULT;
config.duration = NORMAL_OP_DURATION_DEFAULT;
state = STATE_NORMAL;
event_new_config = process_alloc_event();
rest_init_engine();
readings_resource.flags += IS_OBSERVABLE;
rest_activate_resource(&readings_resource, "sen/readings");
rest_activate_resource(&very_sleepy_conf, "very_sleepy_config");
printf("Very Sleepy Demo Process\n");
switch_to_normal();
etimer_set(&et_periodic, PERIODIC_INTERVAL);
while(1) {
PROCESS_YIELD();
if(ev == sensors_event && data == &button_left_sensor) {
switch_to_normal();
}
if(ev == event_new_config) {
stimer_set(&st_interval, config.interval);
stimer_set(&st_duration, config.duration);
}
if((ev == PROCESS_EVENT_TIMER && data == &et_periodic) ||
(ev == sensors_event && data == &button_left_sensor) ||
(ev == event_new_config)) {
/*
* Determine if the stack is about to do essential network maintenance
* and, if so, keep the MAC layer on
*/
mac_keep_on = keep_mac_on();
if(mac_keep_on == MAC_MUST_STAY_ON || state != STATE_VERY_SLEEPY) {
leds_on(LEDS_GREEN);
NETSTACK_MAC.on();
}
/*
* Next, switch between normal and very sleepy mode depending on config,
* send notifications to observers as required.
*/
if(state == STATE_NOTIFY_OBSERVERS) {
REST.notify_subscribers(&readings_resource);
state = STATE_NORMAL;
}
if(state == STATE_NORMAL) {
if(stimer_expired(&st_duration)) {
stimer_set(&st_duration, config.duration);
if(config.mode == VERY_SLEEPY_MODE_ON) {
switch_to_very_sleepy();
}
}
} else if(state == STATE_VERY_SLEEPY) {
if(stimer_expired(&st_interval)) {
switch_to_normal();
}
}
if(mac_keep_on == MAC_CAN_BE_TURNED_OFF && state == STATE_VERY_SLEEPY) {
leds_off(LEDS_GREEN);
NETSTACK_MAC.off(0);
} else {
leds_on(LEDS_GREEN);
NETSTACK_MAC.on();
}
/* Schedule next pass */
etimer_set(&et_periodic, PERIODIC_INTERVAL);
}
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/