103 lines
5.1 KiB
TypeScript
103 lines
5.1 KiB
TypeScript
/**
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* Regression repro for GitHub issue #247 — "There are problems with the
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* simulation results."
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*
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* An ESP32-C3 reads a slide switch on GPIO2 and drives a red LED (GPIO7) and a
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* green LED (GPIO6): `red = state; green = !state`. On Wokwi both LEDs respond
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* to the switch; on Velxio only the green LED ever lit because GPIO2 never went
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* high no matter the switch position.
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*
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* Two bugs combined, both proven here at the netlist/solve level:
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*
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* 1. The slide-switch SPICE model only wired pin 1 <-> pin 2 (an SPST),
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* ignoring pin 3. The switch is really an SPDT whose common (pin 2)
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* selects pin 1 at value=0 or pin 3 at value=1, so the common could never
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* reach whatever pin 3 carried.
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* 2. The ESP32-C3 exposes its supply as 3V3.1/3V3.2 (no bare "3V3"), and
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* VCC_PIN_RE has no numeric-suffix branch, so 3V3.2 was never canonicalised
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* to the vcc_rail and floated at 0 V — the switch's HIGH side was dead.
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*
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* The circuit mirrors the reported project (accdba79-...): switch pin 3 -> 3V3.2,
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* pin 1 -> GND.2, pin 2 (common) -> GPIO2; red LED via 330R from GPIO7; green
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* LED via 330R from GPIO6; both cathodes to GND.8.
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*/
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import { describe, it, expect } from 'vitest';
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import { buildNetlist } from '../simulation/spice/NetlistBuilder';
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import { BOARD_PIN_GROUPS } from '../simulation/spice/boardPinGroups';
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import { runNetlist } from './helpers/testSolver';
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import type { BuildNetlistInput } from '../simulation/spice/types';
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const GROUP = BOARD_PIN_GROUPS['esp32-c3'];
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function buildIssue247(switchValue: 0 | 1): BuildNetlistInput {
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return {
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components: [
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{ id: 'sw', metadataId: 'slide-switch', properties: { value: switchValue } },
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{ id: 'led_red', metadataId: 'led', properties: { color: 'red' } },
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{ id: 'led_green', metadataId: 'led', properties: { color: 'green' } },
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{ id: 'r_red', metadataId: 'resistor', properties: { value: '330' } },
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{ id: 'r_green', metadataId: 'resistor', properties: { value: '330' } },
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],
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wires: [
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// Slide switch: 3V3 on pin 3, GND on pin 1, common (pin 2) -> GPIO2.
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{ id: 'w1', start: { componentId: 'esp32-c3', pinName: '3V3.2' }, end: { componentId: 'sw', pinName: '3' } },
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{ id: 'w2', start: { componentId: 'sw', pinName: '1' }, end: { componentId: 'esp32-c3', pinName: 'GND.2' } },
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{ id: 'w3', start: { componentId: 'sw', pinName: '2' }, end: { componentId: 'esp32-c3', pinName: '2' } },
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// Red LED: GPIO7 -> 330R -> anode; cathode -> GND.8.
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{ id: 'w4', start: { componentId: 'esp32-c3', pinName: '7' }, end: { componentId: 'r_red', pinName: '1' } },
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{ id: 'w5', start: { componentId: 'r_red', pinName: '2' }, end: { componentId: 'led_red', pinName: 'A' } },
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{ id: 'w6', start: { componentId: 'esp32-c3', pinName: 'GND.8' }, end: { componentId: 'led_red', pinName: 'C' } },
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// Green LED: GPIO6 -> 330R -> anode; cathode -> GND.8.
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{ id: 'w7', start: { componentId: 'esp32-c3', pinName: '6' }, end: { componentId: 'r_green', pinName: '1' } },
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{ id: 'w8', start: { componentId: 'r_green', pinName: '2' }, end: { componentId: 'led_green', pinName: 'A' } },
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{ id: 'w9', start: { componentId: 'esp32-c3', pinName: 'GND.8' }, end: { componentId: 'led_green', pinName: 'C' } },
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],
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boards: [
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{
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id: 'esp32-c3',
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boardKind: 'esp32-c3',
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vcc: GROUP.vcc,
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// GPIO2 is a plain INPUT (no internal pull); the switch alone drives it.
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pins: {
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'2': { type: 'input' },
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'7': { type: 'digital', v: 0 },
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'6': { type: 'digital', v: 0 },
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},
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groundPinNames: GROUP.gnd,
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vccPinNames: GROUP.vcc_pins,
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},
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],
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analysis: { kind: 'op' },
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};
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}
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describe('issue #247 — ESP32-C3 slide switch drives GPIO2 (SPDT + 3V3 rail)', () => {
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it('ties the ESP32-C3 3V3.2 pin to the 3.3 V rail (not floating at 0 V)', () => {
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const { netlist, pinNetMap } = buildNetlist(buildIssue247(0));
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// The bug: 3V3.2 fell through VCC canonicalisation and got its own dead net.
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expect(pinNetMap.get('esp32-c3:3V3.2')).toBe('vcc_rail');
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expect(netlist).toMatch(/V_VCC_RAIL vcc_rail 0 DC 3\.3/);
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});
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it('reads GPIO2 LOW when the switch selects GND (value=0)', { timeout: 30_000 }, async () => {
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const input = buildIssue247(0);
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const { netlist, pinNetMap } = buildNetlist(input);
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const gpio2 = pinNetMap.get('esp32-c3:2')!;
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expect(gpio2).toBeTruthy();
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const result = await runNetlist(netlist);
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// Common wired to pin 1 (GND) -> ~0 V -> digitalRead LOW -> green LED path.
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expect(result.dcValue(`v(${gpio2})`)).toBeCloseTo(0, 1);
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});
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it('reads GPIO2 HIGH when the switch selects 3V3 (value=1)', { timeout: 30_000 }, async () => {
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const input = buildIssue247(1);
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const { netlist, pinNetMap } = buildNetlist(input);
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const gpio2 = pinNetMap.get('esp32-c3:2')!;
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expect(gpio2).toBeTruthy();
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const result = await runNetlist(netlist);
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// Common wired to pin 3 (3V3) -> ~3.3 V -> digitalRead HIGH -> red LED path.
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// Before the fix this sat at 0 V (switch ignored pin 3 AND 3V3.2 floated).
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expect(result.dcValue(`v(${gpio2})`)).toBeGreaterThan(3.0);
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});
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});
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