private void handleFirstRX(SinkData channel, Time currentTime)
throws NoTokenException, IllegalActionException {
// Method to handle the first stage, receiving the first synchronisation pulse
IntToken token = (IntToken) input.get(0); // Retrieve the token from the input
Time timeDelta =
currentTime.subtract(
waitTime); // Calculate a delta between the current time and when the channel was
// changed, to find the waiting time
if (timeDelta.getDoubleValue() <= 1.5
&& token.equals(
1)) { // Token is 1, and we have been waiting for longer than 1.5s. So we will not have
// a follow-up token, so can't be used for determining t
channelQueue
.remove(); // Send the current channel to the back of the queue so we can do something
// useful while it is in its sleep state
channelQueue.add(currentChannel);
return;
}
if (!channel
.secondRun) { // If this is the first time we have received packets on the channel we will
// need the current time to calculate a t
channel.t = currentTime;
}
channel.state = states.SECONDRX; // Set the channel state to the next stage
channel.firstValue = token.intValue(); // Store the value we have received
System.out.println("FIRSTRX on channel " + currentChannel + " currentTime is " + currentTime);
}
private void handleSecondRX(SinkData channel, Time currentTime)
throws NoTokenException, IllegalActionException {
// Method to handle the second stage, receiving the second synchronisation pulse
if (!channel
.secondRun) { // If this is the second time we have received packets on the channel we
// already have t so no need to calculate it
channel.t = currentTime.subtract(channel.t);
}
int currentValue = ((IntToken) input.get(0)).intValue(); // Retrieve the value from the input
if (channel.firstValue == 1 && currentValue == 1) { // If the first two values are 1 then n is 1
channel.n = 1;
channel.t =
new Time(getDirector())
.add(
channel.t.getDoubleValue()
/ 12); // Calculate t given that n is 1, i.e divide the period by 12 as per
// the protocol
}
setNextFireTime(
channel,
currentTime.getDoubleValue()
+ (channel.t.getDoubleValue()
* currentValue)); // Manually set the next fire time for this channel
channel.state = states.FIRSTTX; // Set the channel state to the next stage
System.out.println(
"SECONDRX on channel "
+ currentChannel
+ ". Current value is "
+ currentValue
+ ". t is "
+ channel.t
+ ". nextFireTime is "
+ channel.nextFireTime
+ " currentTime is "
+ currentTime);
nextChannel(currentChannel, currentTime);
removeFromQueue(currentChannel); // We can now move onto listening on the next channel
}
