private void handleNCalc(SinkData channel, Time currentTime) throws NoTokenException, IllegalActionException { // Method to handle the fourth stage, where we listen to the first synchronisation pulse to find // the value of n System.out.println(channel.nextFireTime.getDoubleValue() >= currentTime.getDoubleValue() + 0.4); if (channel.nextFireTime.getDoubleValue() >= currentTime.getDoubleValue()) { input.get(0); return; } else if (channel .secondRun) { // If we are on the second run through, we have already transmitted twice so // we can stop here channel.state = states.FINISHED; return; } else if (currentTime.subtract(channel.nextFireTime).getDoubleValue() > 2) { // There is a large delta between when we were supposed to fire and when we fired, so // we probably have a collision with another channel channel.secondRun = true; // Store that we will need to go around again for this channel channel.state = states.FIRSTRX; // Set the stage back to the beginning so we can restart System.out.println( "NCALC on channel " + currentChannel + " n is: " + channel.n + ". t is " + channel.t + ". nextFireTime is " + channel.nextFireTime + " currentTime is " + currentTime); nextChannel(currentChannel, currentTime); } else { channel.n = ((IntToken) input.get(0)).intValue(); setNextFireTime( channel, currentTime.getDoubleValue() + (channel.t.getDoubleValue() * channel.n)); channel.state = states.SECONDTX; System.out.println( "NCALC on channel " + currentChannel + " n is: " + channel.n + ". t is " + channel.t + ". nextFireTime is " + channel.nextFireTime + " currentTime is " + currentTime); nextChannel(currentChannel, currentTime); removeFromQueue(currentChannel); } }
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 }