学会UserButton之后很想联合学过的这三个interface写点东西，好吧，小程序一个。。
定时器控制3个led的亮灭，UserButton用来控制定时器的开关。

#include<Timer.h>
#include<UserButton.h>
module ButtonTest2C @safe()
{
	uses
	{
		interface Boot;
		interface Leds;
		interface Get<button_state_t>;
		interface Notify<button_state_t>;
		interface Timer<TMilli> as Timer0;
	}
}
implementation
{
	uint8_t led_state=1;
	bool isrunning=FALSE;
	event void Boot.booted()
	{
		call Notify.enable();
		call Timer0.startPeriodic(2000);		

	}
	event void Timer0.fired()
	{
		call Leds.set((led_state++)%8);
	}
	event void Notify.notify(button_state_t state)
	{
		isrunning=call Timer0.isRunning();
		if(state==BUTTON_PRESSED)
		{
			if(isrunning==TRUE)
				call Timer0.stop();
			else
				call Timer0.startPeriodic(2000);
		}
	}
}