DFlipFlop.java

// jchdl: Jianchang Constructed Hardware Description Library
// Copyright (c) 2018 Jianchang Wang <wjcdx@qq.com>
// All rights reserved.
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package org.jchdl.model.gsl.sequential.ff;

import org.jchdl.model.gsl.core.datatype.net.Wire;
import org.jchdl.model.gsl.core.gate.no.Not;
import org.jchdl.model.gsl.core.meta.Node;
import org.jchdl.model.gsl.core.meta.PropagateManager;
import org.jchdl.model.gsl.core.value.Value;
import org.jchdl.model.gsl.sequential.latch.DLatch;

public class DFlipFlop extends Node {
    private Wire q;
    private Wire nq;
    private Wire clk;
    private Wire d;

    public DFlipFlop(Wire q, Wire nq, Wire clk, Wire d) {
        in(clk);
        in(d);
        out(q);
        out(nq);
        construct();
    }

    @Override
    public void logic() {
        clk = new Wire(in(0));
        d = new Wire(in(1));
        q = new Wire(out(0));
        nq = new Wire(out(1));

        Wire nclk = new Wire();
        Not.inst(nclk, clk);

        Wire qm = new Wire();
        Wire nqm = Wire.toGround();
        DLatch.inst(qm, nqm, nclk, d);
        DLatch.inst(q, nq, clk, qm);
    }

    public static DFlipFlop inst(Wire q, Wire nq, Wire clk, Wire d) {
        return new DFlipFlop(q, nq, clk, d);
    }

    public static void main(String[] args) throws InterruptedException {
        Wire clk = new Wire();
        Wire d = new Wire();
        Wire q = new Wire();
        Wire nq = new Wire();

        DFlipFlop.inst(q, nq, clk, d);

        long millis = 1000;
        while (true) {
            Thread.sleep(millis);

            d.assign(Value.V0);
            PropagateManager.propagateParallel(d);
            System.out.println("d => 0, q => " + q.getValue().toString());

            clk.assign(Value.V0);
            PropagateManager.propagateParallel(clk);
            System.out.println("c => 0, q => " + q.getValue().toString());

            Thread.sleep(millis);

            clk.assign(Value.V1);
            PropagateManager.propagateParallel(clk);
            System.out.println("c => 1, q => " + q.getValue().toString());

            Thread.sleep(millis);

            d.assign(Value.V1);
            PropagateManager.propagateParallel(d);
            System.out.println("d => 1, q => " + q.getValue().toString());

            clk.assign(Value.V0);
            PropagateManager.propagateParallel(clk);
            System.out.println("c => 0, q => " + q.getValue().toString());

            Thread.sleep(millis);

            clk.assign(Value.V1);
            PropagateManager.propagateParallel(clk);
            System.out.println("c => 1, q => " + q.getValue().toString());
        }
    }
}