tinyos--随机数

tinyos2.x/tos/interfaces/中提供了组件Random.nc，其提供了两个命令：async command uint32_t rand32()、async command uint16_t rand16();调用的时候直接int16/32_t  num=call Random.rand16/32()即可。

给出简单的Blink例子

1.更改BlinkC.nc

#include <Timer.h>
module BlinkC{
    uses interface Timer<TMilli> as Timer0;
//    uses interface Timer<TMilli> as Timer1;
//    uses interface Timer<TMilli> as Timer2;
    uses interface Leds;
    uses interface Boot;
    uses interface Random;
}
implementation{
    event void Boot.booted(){
        call Timer0.startPeriodic(250);
//        call Timer1.startPeriodic(1000);
//        call Timer2.startPeriodic(500);
    }
    event void Timer0.fired(){
        int16_t i=call Random.rand16();
        call Leds.set(i);
    }
 /*    event void Timer1.fired(){
        call Leds.led1Toggle();
    }
     event void Timer2.fired(){
        call Leds.led2Toggle();
    }
*/
}

2.更改BlinkAppC.nc

configuration BlinkAppC{
}
implementation{
    components MainC,LedsC,RandomC;
    components BlinkC as App;
    components new TimerMilliC() as Timer0;
//    components new TimerMilliC() as Timer1;
 //   components new TimerMilliC() as Timer2;


    App->MainC.Boot;
    App.Timer0->Timer0;
//    App.Timer1->Timer1;
 //   App.Timer2->Timer2;
    App.Leds->LedsC;
    App.Random->RandomC;
}