56 lines
1.8 KiB
TypeScript
56 lines
1.8 KiB
TypeScript
// Logic Rising Edge component for the LogicSimulator used on the 8-bit-Computer
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// Copyright (C) 2022 Sascha Nitsch
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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interface LogicRisingEdgeParam extends BaseComponentParam {
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delay?: number;
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}
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// eslint-disable-next-line @typescript-eslint/no-unused-vars
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class LogicRisingEdge extends BaseComponent {
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private a = false;
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private olda = false;
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private q = false;
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private delay: number;
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private activeDelay = 0;
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constructor(simulator: Simulator, id: string, param: LogicRisingEdgeParam) {
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super(simulator, id, param);
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this.pins.set('a', new TriState(this, -30, 0));
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this.pins.set('q', new TriState(this, 30, 0));
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this.delay = param.delay || 0;
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}
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setup(canvas: SVGElement) {
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super.doSetup('logicraisingedge', canvas);
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}
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io() {
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this.a = this.binary(this.getPin('a').getAndReset(), true);
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}
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update(): boolean {
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const oldstate = this.q;
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if (this.olda === false && this.a === true) {
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this.activeDelay = this.delay;
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}
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this.q = this.activeDelay > 0;
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this.getPin('q').setBool(this.q);
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this.olda = this.a;
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if (this.activeDelay > 0) {
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this.activeDelay--;
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}
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return oldstate !== this.q || this.q === true;
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}
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}
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