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first version of a splitter

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This commit is contained in:
hneemann 2016-03-20 15:35:14 +01:00
parent ed6a2f6a16
commit b9c5f6fd35
3 changed files with 2 additions and 94 deletions
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42
src/main/java/de/neemann/digital/core/wiring/Bus.java
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@ -1,42 +0,0 @@
package de.neemann.digital.core.wiring;
import de.neemann.digital.core.BurnException;
import de.neemann.digital.core.NodeException;
import de.neemann.digital.core.ObservableValue;
import de.neemann.digital.core.Value;
import de.neemann.digital.core.basic.FanIn;
/**
* @author hneemann
*/
public class Bus extends FanIn {
private Value value;
public Bus(int bits) {
super(bits);
value = new Value(bits);
}
@Override
public void readInputs() throws NodeException {
ObservableValue found = null;
for (ObservableValue in : inputs) {
if (!in.isHighZ()) {
if (found != null)
throw new BurnException(in, found);
found = in;
}
}
if (found == null) {
value.set(0, true);
} else {
value.set(found.getValue(), false);
}
}
@Override
public void writeOutputs() throws NodeException {
output.set(value);
}
}

4
src/main/java/de/neemann/digital/core/wiring/Splitter.java
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@ -59,7 +59,7 @@ public class Splitter implements Element {
}
private Observer createObserverForInput(int i) throws NodeException {
Observer observer = outPorts.getSimpleTargetObserver(inPorts.getPort(i), inputs, outputs);
Observer observer = outPorts.getSingleTargetObserver(inPorts.getPort(i), inputs, outputs);
if (observer == null)
throw new NodeException("splitterMismatchError");
return observer;
@ -126,7 +126,7 @@ public class Splitter implements Element {
* @param inputs
* @param outputs
*/
public Observer getSimpleTargetObserver(Port inPort, ObservableValue[] inputs, ObservableValue[] outputs) {
public Observer getSingleTargetObserver(Port inPort, ObservableValue[] inputs, ObservableValue[] outputs) {
int pos = inPort.getPos();
int bits = inPort.getBits();

50
src/test/java/de/neemann/digital/core/wiring/BusTest.java
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@ -1,50 +0,0 @@
package de.neemann.digital.core.wiring;
import de.neemann.digital.TestExecuter;
import de.neemann.digital.core.BurnException;
import de.neemann.digital.core.Model;
import de.neemann.digital.core.ObservableValue;
import de.neemann.digital.core.basic.FanIn;
import junit.framework.TestCase;
/**
* @author hneemann
*/
public class BusTest extends TestCase {
public void testBus() throws Exception {
Model model = new Model();
ObservableValue a = new ObservableValue("a", 1, true);
ObservableValue b = new ObservableValue("b", 1);
FanIn out = model.add(new Bus(1));
out.setInputs(a, b);
TestExecuter te = new TestExecuter(model).setInputs(a, b).setOutputs(out.getOutputs());
te.check(0, 0, 0);
te.check(0, 1, 1);
a.setHighZ(false);
b.setHighZ(true);
te.check(0, 1, 0);
te.check(1, 0, 1);
a.setHighZ(false);
b.setHighZ(false);
try {
te.check(0, 0, 0);
assertTrue(false);
} catch (BurnException e) {
assertTrue(true);
}
}
public void testBusHighZ() throws Exception {
Model model = new Model();
ObservableValue a = new ObservableValue("a", 1, true);
ObservableValue b = new ObservableValue("b", 1, true);
FanIn out = model.add(new Bus(1));
out.setInputs(a, b);
TestExecuter te = new TestExecuter(model).setInputs(a, b).setOutputs(out.getOutputs());
assertTrue(out.getOutput().isHighZ());
}
}