clight.c

#include "contiki.h"
#include "dev/button-sensor.h"
#include "dev/leds.h"
#include <stdio.h>

PROCESS(blink_process, "Blink");
AUTOSTART_PROCESSES(&blink_process);

PROCESS_THREAD(blink_process,ev,data){
	PROCESS_BEGIN();
	SENSORS_ACTIVATE(button_sensor);

	static int value = 0;

	while(1){
		PROCESS_WAIT_EVENT();
		static struct etimer et;
		
		if(ev == sensors_event && data == &button_sensor){
			printf("Button press event :\n");
			value = value +1;

			if(value == 1){			
				etimer_set(&et, CLOCK_SECOND);
				PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
				leds_on(LEDS_RED);
			}else if(value == 2){
				etimer_set(&et, CLOCK_SECOND);
				PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
				leds_on(LEDS_GREEN);

			}else if(value == 3){
				etimer_set(&et, CLOCK_SECOND);
				PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
				leds_on(LEDS_BLUE);
			}else{
				etimer_set(&et, CLOCK_SECOND);
				PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
				leds_off(LEDS_ALL);
				value = 0 ;				
			}
		}
		
	}
	PROCESS_END();
}