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Reimplement Rtimer of Cooja mote as a microsecond resolution timer

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This commit is contained in:
Yasuyuki Tanaka 2016-09-06 15:14:10 +02:00
parent 0201208664
commit 6d51c5f58e
8 changed files with 55 additions and 71 deletions
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40
tools/cooja/java/org/contikios/cooja/contikimote/interfaces/ContikiClock.java
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@ -52,8 +52,11 @@ import org.contikios.cooja.mote.memory.VarMemory;
* Contiki variables:
* <ul>
* <li>clock_time_t simCurrentTime
* <li>clock_time_t simNextExpirationTime
* <li>int simProcessRunValue
* <li>rtimer_clock_t simRtimerCurrentTicks
* <li>clock_time_t simEtimerNextExpirationTime
* <li>rtimer_clock_t simEtimerNextExpirationTime
* <li>int simEtimerProcessRunValue
* <li>int simRtimerProcessRunValue
* <li>int simEtimerPending
* </ul>
*
@ -125,16 +128,24 @@ public class ContikiClock extends Clock implements ContikiMoteInterface, PolledB
public void doActionsBeforeTick() {
/* Update time */
setTime(mote.getSimulation().getSimulationTime() + timeDrift);
long currentSimulationTime = simulation.getSimulationTime();
setTime(currentSimulationTime + timeDrift);
moteMem.setInt64ValueOf("simRtimerCurrentTicks", currentSimulationTime);
}
public void doActionsAfterTick() {
long currentSimulationTime = mote.getSimulation().getSimulationTime();
/* Always schedule for Rtimer if anything pending */
if (moteMem.getIntValueOf("simRtimerPending") != 0) {
mote.scheduleNextWakeup(moteMem.getInt64ValueOf("simRtimerNextExpirationTime"));
}
/* Request next tick for remaining events / timers */
int processRunValue = moteMem.getIntValueOf("simProcessRunValue");
if (processRunValue != 0) {
/* Handle next Contiki event in one millisecond */
mote.scheduleNextWakeup(simulation.getSimulationTime() + Simulation.MILLISECOND);
mote.scheduleNextWakeup(currentSimulationTime + Simulation.MILLISECOND);
return;
}
@ -144,15 +155,20 @@ public class ContikiClock extends Clock implements ContikiMoteInterface, PolledB
return;
}
/* Request tick next wakeup time */
int nextExpirationTime = moteMem.getIntValueOf("simNextExpirationTime");
if (nextExpirationTime <= 0) {
/*logger.warn("Event timer already expired, but has been delayed: " + nextExpirationTime);*/
mote.scheduleNextWakeup(simulation.getSimulationTime() + Simulation.MILLISECOND);
return;
/* Request tick next wakeup time for Etimer */
long etimerNextExpirationTime = (long)moteMem.getInt32ValueOf("simEtimerNextExpirationTime") * Simulation.MILLISECOND;
long etimerTimeToNextExpiration = etimerNextExpirationTime - moteTime;
if (etimerTimeToNextExpiration <= 0) {
/* logger.warn(mote.getID() + ": Event timer already expired, but has been delayed: " + etimerTimeToNextExpiration); */
/* Wake up in one millisecond to handle a missed Etimer task
* which may be blocked by busy waiting such as one in
* radio_send(). Scheduling it in a shorter time than one
* millisecond, e.g., one microsecond, seems to be worthless and
* it would cause unnecessary CPU usage. */
mote.scheduleNextWakeup(currentSimulationTime + Simulation.MILLISECOND);
} else {
mote.scheduleNextWakeup(currentSimulationTime + etimerTimeToNextExpiration);
}
mote.scheduleNextWakeup(simulation.getSimulationTime() + Simulation.MILLISECOND*nextExpirationTime);
}