testtimerc.nc

tinyos2.0版本驱动

// $Id: TestTimerC.nc,v 1.3 2007/07/04 15:53:56 scipio Exp $

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/**
 *  Implementation of the TestTimer application.
 *
 *  @author Phil Levis
 *  @date   April 7 2007
 *
 **/

module TestTimerC {
  uses {
    interface Boot;
    interface Timer<TMilli> as A;
    interface Timer<TMilli> as B;
    interface Timer<TMilli> as C;
    interface Timer<TMilli> as D;
    interface Random;
  }
}
implementation {

  uint32_t aTime;
  uint32_t bTime;
  uint32_t cTime;
  uint32_t dTime;

  sim_time_t aStart;
  sim_time_t bStart;
  sim_time_t cStart;
  sim_time_t dStart;

  void check(char name, sim_time_t start, uint32_t interval) {
    sim_time_t now = sim_time();
    sim_time_t elapsed = now - start;
    elapsed /= (sim_ticks_per_sec() / 1024);
    if (elapsed != interval) {
      dbg("TestTimer", "Timer %c is off. Should have fired in %u, fired in %u @ %s.\n", name, interval, (uint32_t)elapsed, sim_time_string());
    }
    else {
      dbg("TestTimer", "Timer %c is good @ %s.\n", name, sim_time_string());
    }
  }
  
  void randomizeTimers() {
    aTime = call Random.rand32() & 0x3ff;
    bTime = call Random.rand32() & 0x3ff;
    cTime = call Random.rand32() & 0x3ff;
    dTime = call Random.rand32() & 0x3ff;
  }

  void startTimers() {
    call A.startPeriodic(aTime);
    call B.startPeriodic(bTime);
//    call C.startOneShot(cTime);
 //   call D.startOneShot(dTime);
    aStart = bStart = cStart = dStart = sim_time();
  }
  
  event void Boot.booted() {
    randomizeTimers();
    startTimers();
  }

  event void A.fired() {
    check('A', aStart, aTime);
    aStart = sim_time();
    if (aTime & 0xff) {
      call A.stop();
      aTime = 1 + (call Random.rand32() & 0x3ff);
      call A.startPeriodic(aTime);
    }
  }
  
  event void B.fired() {
    check('B', bStart, bTime);
    call B.stop();
    bTime = 1 + (call Random.rand32() & 0x3fff);
    call B.startPeriodic(bTime);
    bStart = sim_time();
  }
  
  event void C.fired() {
    check('C', cStart, cTime);
    if (cTime & 0xff) {
      call C.stop();
      cTime = 1 + (call Random.rand32() & 0x3ff);
    }
    call C.startOneShot(cTime);
    cStart = sim_time();
  }
  
  event void D.fired() {
    check('D', dStart, dTime);
    dTime = 1 + (call Random.rand32() & 0x3ff);
    call D.startOneShot(dTime);
    dStart = sim_time();
  }
  
}