A minimal contiki program to play around with LEDs based on buttons pressed

led-experiment.c

#include "contiki.h"
#include "sys/etimer.h"
#include "dev/leds.h"
#include "dev/watchdog.h"
#include "button-sensor.h"
#include "rf-core/rf-ble.h"

#include <stdio.h>
/*---------------------------------------------------------------------------*/
#define CC26XX_DEMO_LOOP_INTERVAL       (CLOCK_SECOND * 20)
#define CC26XX_DEMO_LEDS_PERIODIC       LEDS_YELLOW
#define CC26XX_DEMO_LEDS_BUTTON         LEDS_RED
#define CC26XX_DEMO_LEDS_REBOOT         LEDS_ALL
/*---------------------------------------------------------------------------*/

#define CC26XX_DEMO_SENSOR_1     &button_left_sensor
#define CC26XX_DEMO_SENSOR_2     &button_right_sensor

/*---------------------------------------------------------------------------*/
static struct etimer et;
/*---------------------------------------------------------------------------*/
PROCESS(sensortag_led_experiment, "sensortag_led_experiment");
AUTOSTART_PROCESSES(&sensortag_led_experiment);
/*---------------------------------------------------------------------------*/

// ev: event type
// data: data passed along with the event
PROCESS_THREAD(sensortag_led_experiment, ev, data)
{
    
    PROCESS_BEGIN();
    
    printf("CC26XX LED Experiment\n");
    
    /* Init the BLE advertisement daemon */
    rf_ble_beacond_config(0, BOARD_STRING);
    rf_ble_beacond_start();
    
    etimer_set(&et, CC26XX_DEMO_LOOP_INTERVAL);
    
    while(1) {
        
        // PROCESS_YIELD: Wait for an event
        // (However, I believe this is non-blocking)
        PROCESS_YIELD();
        
        // PROCESS_EVENT_TIMER: This event is sent to a process when an event timer (etimer) has expired.
        if(ev == PROCESS_EVENT_TIMER) {
            // Toggle LED once timer hits zero, then reset the timer
            if(data == &et) {
                leds_toggle(CC26XX_DEMO_LEDS_PERIODIC);
                
                etimer_set(&et, CC26XX_DEMO_LOOP_INTERVAL);
            }
        } else if(ev == sensors_event) {
            if(data == CC26XX_DEMO_SENSOR_1) {
                // If you hit the left button, toggle the Red LED
                printf("Left: Pin %d, press duration %d clock ticks\n",
                       (CC26XX_DEMO_SENSOR_1)->value(BUTTON_SENSOR_VALUE_STATE),
                       (CC26XX_DEMO_SENSOR_1)->value(BUTTON_SENSOR_VALUE_DURATION));
                
                if((CC26XX_DEMO_SENSOR_1)->value(BUTTON_SENSOR_VALUE_DURATION) >
                   CLOCK_SECOND) {
                    printf("Long button press!\n");
                }
                
                leds_toggle(CC26XX_DEMO_LEDS_BUTTON);
            } else if(data == CC26XX_DEMO_SENSOR_2) {
                // If you hit the right button, turn on both LEDs, then reset
                leds_on(CC26XX_DEMO_LEDS_REBOOT);
                watchdog_reboot(); // I believe this turns all LEDs off again
            }
        }
    }
    
    PROCESS_END();
}
/*---------------------------------------------------------------------------*/
/**
 * @}
 * @}
 * @}
 */