Examples with BitWidth com.cburch.logisim.data.BitWidth used on opensource projects

Example 36 with BitWidth

use of com.cburch.logisim.data.BitWidth in project logisim-evolution by reds-heig.

the class CounterPoker method paint.

/**
 * Draws an indicator that the caret is being selected. Here, we'll draw a
 * red rectangle around the value.
 */
@Override
public void paint(InstancePainter painter) {
    Bounds bds = painter.getBounds();
    BitWidth width = painter.getAttributeValue(StdAttr.WIDTH);
    int len = (width.getWidth() + 3) / 4;
    Graphics g = painter.getGraphics();
    g.setColor(Color.RED);
    // width of caret rectangle
    int wid = 7 * len + 2;
    // height of caret rectangle
    int ht = 16;
    g.drawRect(bds.getX() + (bds.getWidth() - wid) / 2, bds.getY() + (bds.getHeight() - ht) / 2, wid, ht);
    g.setColor(Color.BLACK);
}

Example 37 with BitWidth

use of com.cburch.logisim.data.BitWidth in project logisim-evolution by reds-heig.

the class GrayCounter method propagate.

@Override
public void propagate(InstanceState state) {
    // This is the same as with SimpleGrayCounter, except that we use the
    // StdAttr.WIDTH attribute to determine the bit width to work with.
    BitWidth width = state.getAttributeValue(StdAttr.WIDTH);
    CounterData cur = CounterData.get(state, width);
    boolean trigger = cur.updateClock(state.getPortValue(0));
    if (trigger)
        cur.setValue(GrayIncrementer.nextGray(cur.getValue()));
    state.setPort(1, cur.getValue(), 9);
}

Example 38 with BitWidth

use of com.cburch.logisim.data.BitWidth in project logisim-evolution by reds-heig.

the class GrayCounter method paintInstance.

@Override
public void paintInstance(InstancePainter painter) {
    // This is essentially the same as with SimpleGrayCounter, except for
    // the invocation of painter.drawLabel to make the label be drawn.
    painter.drawBounds();
    painter.drawClock(0, Direction.EAST);
    painter.drawPort(1);
    painter.drawLabel();
    if (painter.getShowState()) {
        BitWidth width = painter.getAttributeValue(StdAttr.WIDTH);
        CounterData state = CounterData.get(painter, width);
        Bounds bds = painter.getBounds();
        GraphicsUtil.drawCenteredText(painter.getGraphics(), StringUtil.toHexString(width.getWidth(), state.getValue().toIntValue()), bds.getX() + bds.getWidth() / 2, bds.getY() + bds.getHeight() / 2);
    }
}

Example 39 with BitWidth

use of com.cburch.logisim.data.BitWidth in project logisim-evolution by reds-heig.

the class GrayIncrementer method nextGray.

/*
	 * Note that there are no instance variables. There is only one instance of
	 * this class created, which manages all instances of the component. Any
	 * information associated with individual instances should be handled
	 * through attributes. For GrayIncrementer, each instance has a "bit width"
	 * that it works with, and so we'll have an attribute.
	 */
/**
 * Computes the next gray value in the sequence after prev. This static
 * method just does some bit twiddling; it doesn't have much to do with
 * Logisim except that it manipulates Value and BitWidth objects.
 */
static Value nextGray(Value prev) {
    BitWidth bits = prev.getBitWidth();
    if (!prev.isFullyDefined())
        return Value.createError(bits);
    int x = prev.toIntValue();
    // compute parity of x
    int ct = (x >> 16) ^ x;
    ct = (ct >> 8) ^ ct;
    ct = (ct >> 4) ^ ct;
    ct = (ct >> 2) ^ ct;
    ct = (ct >> 1) ^ ct;
    if ((ct & 1) == 0) {
        // if parity is even, flip 1's bit
        x = x ^ 1;
    } else {
        // else flip bit just above last 1
        // first compute the last 1
        int y = x ^ (x & (x - 1));
        y = (y << 1) & bits.getMask();
        x = (y == 0 ? 0 : x ^ y);
    }
    return Value.createKnown(bits, x);
}

Example 40 with BitWidth

use of com.cburch.logisim.data.BitWidth in project logisim-evolution by reds-heig.

the class ControlledBuffer method propagate.

@Override
public void propagate(InstanceState state) {
    Value control = state.getPortValue(2);
    BitWidth width = state.getAttributeValue(StdAttr.WIDTH);
    if (control == Value.TRUE) {
        Value in = state.getPortValue(1);
        state.setPort(0, isInverter ? in.not() : in, GateAttributes.DELAY);
    } else if (control == Value.ERROR || control == Value.UNKNOWN) {
        state.setPort(0, Value.createError(width), GateAttributes.DELAY);
    } else {
        Value out;
        if (control == Value.UNKNOWN || control == Value.NIL) {
            AttributeSet opts = state.getProject().getOptions().getAttributeSet();
            if (opts.getValue(Options.ATTR_GATE_UNDEFINED).equals(Options.GATE_UNDEFINED_ERROR)) {
                out = Value.createError(width);
            } else {
                out = Value.createUnknown(width);
            }
        } else {
            out = Value.createUnknown(width);
        }
        state.setPort(0, out, GateAttributes.DELAY);
    }
}