Build: hardware UI layer — footswitch debounce, RGB LEDs, OLED display
- footswitch.py: GPIO debounce engine (20ms window), long-press detection (500ms), threaded poll loop with virtual pin support for testing - leds.py: WS2812B/APA102 RGB LED controller with bypass indicator (red/green), preset navigation scan animation, tap tempo blip, configurable brightness (0.0-1.0) - display.py: SSD1306 128x64 OLED renderer with preset mode (bank + preset name + FX chain), tuner mode (note + cents bar), FX edit (parameter bar), settings mode, boot splash - __init__.py: Public API re-exports for all 3 modules - tests/test_ui.py: 37 tests — debounce engine, GPIO simulation, short/long press boundary, LED pixel control, bypass colors, display mode rendering (preset/tuner/fx_edit/settings) - scripts/ui_test.py: standalone test tool (python scripts/ui_test.py --all or --interactive)
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#!/usr/bin/env python3
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"""Standalone UI test tool for the Pi Multi-FX Pedal.
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Tests the hardware UI layer without physical hardware:
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- Simulates footswitch presses and verifies callbacks
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- Toggles LED states and logs output
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- Cycles through display modes
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- Interactive menu when run directly
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Usage:
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python scripts/ui_test.py # Interactive mode
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python scripts/ui_test.py --all # Run all automated tests
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python scripts/ui_test.py --footswitch # Footswitch tests only
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python scripts/ui_test.py --leds # LED tests only
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python scripts/ui_test.py --display # Display tests only
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"""
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from __future__ import annotations
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import logging
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import sys
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import time
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# Ensure src is importable
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sys.path.insert(0, ".")
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logging.basicConfig(
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level=logging.DEBUG,
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format="%(levelname)-7s | %(message)s",
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)
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logger = logging.getLogger("ui_test")
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from src.ui.footswitch import (
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DEBOUNCE_MS,
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LONG_PRESS_MS,
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FootSwitch,
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FootswitchController,
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SwitchAction,
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)
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from src.ui.leds import LEDController, LEDDriver, LEDPattern
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from src.ui.display import DisplayController, DisplayState
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# ============================================================
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# Automated test functions
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# ============================================================
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def test_footswitch_basic() -> list[str]:
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"""Test basic footswitch press/release."""
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results = []
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ctrl = FootswitchController()
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actions = []
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ctrl.register_callback(SwitchAction.BYPASS, lambda: actions.append("bypass"))
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ctrl.start()
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time.sleep(0.1)
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# Simulate press via direct trigger
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ctrl.simulate_press(SwitchAction.BYPASS)
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time.sleep(0.05)
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if "bypass" in actions:
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results.append(" ✓ BYPASS callback fired on simulate_press")
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else:
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results.append(" ✗ BYPASS callback NOT fired")
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ctrl.stop()
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return results
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def test_footswitch_debounce() -> list[str]:
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"""Test GPIO debounce engine with virtual pins."""
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results = []
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ctrl = FootswitchController()
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actions = []
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ctrl.register_callback(SwitchAction.PRESET_UP, lambda: actions.append("up"))
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ctrl.register_callback(SwitchAction.TAP_TEMPO, lambda: actions.append("tap"))
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ctrl.start()
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try:
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pin = ctrl._switches[0].gpio_pin # Pin 17
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# --- Short press test ---
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ctrl.simulate_gpio_change(pin, True)
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time.sleep((DEBOUNCE_MS + 20) / 1000) # Past debounce
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ctrl.simulate_gpio_change(pin, False)
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time.sleep((DEBOUNCE_MS + 20) / 1000) # Let poll loop process
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if "up" in actions:
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results.append(" ✓ Short press → PRESET_UP fired")
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else:
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results.append(" ✗ Short press — PRESET_UP not fired")
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# --- Long press test (FS1: PRESET_UP default, TAP_TEMPO long) ---
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ctrl.simulate_gpio_change(pin, True)
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time.sleep((LONG_PRESS_MS + 100) / 1000) # Hold past threshold
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if "tap" in actions:
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results.append(" ✓ Long press → TAP_TEMPO fired")
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else:
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results.append(" ✗ Long press — TAP_TEMPO not fired")
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# Release
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ctrl.simulate_gpio_change(pin, False)
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time.sleep((DEBOUNCE_MS + 20) / 1000)
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finally:
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ctrl.stop()
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return results
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def test_leds() -> list[str]:
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"""Test LED controller features."""
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results = []
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ctrl = LEDController(4, driver=LEDDriver.MOCK)
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ctrl.initialize()
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# Set a pixel
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ctrl.set_pixel(0, (255, 0, 0))
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r, g, b = ctrl._pixels[0]
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results.append(f" ✓ Pixel 0 set: RGB({r},{g},{b}) (expected ~127,0,0)")
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# Bypass LED
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ctrl.set_bypass_led(1, bypassed=True)
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results.append(f" ✓ Bypass LED (bypassed): RGB{ctrl._pixels[1]} (expected red)")
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ctrl.set_bypass_led(2, bypassed=False)
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results.append(f" ✓ Bypass LED (active): RGB{ctrl._pixels[2]} (expected green)")
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# Clear
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ctrl.set_all((128, 128, 128))
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ctrl.clear_all()
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if all(px == (0, 0, 0) for px in ctrl._pixels):
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results.append(" ✓ Clear all → all (0,0,0)")
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else:
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results.append(" ✗ Clear all — pixels not all black")
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# Brightness
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ctrl.set_brightness(0.8)
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results.append(f" ✓ Brightness set to {ctrl._global_brightness}")
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# Animations (should not crash)
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ctrl.preset_animate("up")
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results.append(" ✓ Preset up animation (no crash)")
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ctrl.preset_animate("down")
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results.append(" ✓ Preset down animation (no crash)")
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ctrl.tap_tempo_blip()
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results.append(" ✓ Tap tempo blip (no crash)")
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return results
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def test_display() -> list[str]:
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"""Test display controller state rendering."""
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results = []
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dc = DisplayController()
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init_ok = dc.initialize()
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results.append(f" ✓ Initialize returned {init_ok} (expected False — no HW)")
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# Preset mode
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dc.update(DisplayState(
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mode="preset",
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preset_name="Metal Zone",
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bank_name="B3",
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bypassed=False,
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fx_active=["noise_gate", "distortion", "delay", "reverb"],
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))
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results.append(" ✓ Preset mode: Metal Zone")
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# Tuner mode
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dc.update(DisplayState(
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mode="tuner",
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tuner_note="E",
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tuner_cents=-5,
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))
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results.append(" ✓ Tuner mode: E, -5 cents")
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# FX edit mode
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dc.update(DisplayState(
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mode="fx_edit",
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param_name="Gain",
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param_value=0.67,
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))
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results.append(" ✓ FX edit mode: Gain = 0.67")
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# Settings mode
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dc.update(DisplayState(mode="settings", param_name="MIDI Channel"))
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results.append(" ✓ Settings mode: MIDI Channel")
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# Default state
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dc.update(DisplayState())
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results.append(" ✓ Default (empty) state")
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dc.clear()
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results.append(" ✓ Clear (no crash)")
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return results
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# ============================================================
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# Interactive menu
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# ============================================================
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def interactive_menu():
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"""Run an interactive test session."""
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ctrl = FootswitchController()
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led_ctrl = LEDController(4, driver=LEDDriver.MOCK)
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disp = DisplayController()
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disp.initialize()
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actions = {
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"1": ("Simulate PRESET_UP", lambda: ctrl.simulate_press(SwitchAction.PRESET_UP)),
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"2": ("Simulate PRESET_DOWN", lambda: ctrl.simulate_press(SwitchAction.PRESET_DOWN)),
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"3": ("Simulate BYPASS toggle", lambda: ctrl.simulate_press(SwitchAction.BYPASS)),
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"4": ("Simulate TAP_TEMPO", lambda: ctrl.simulate_press(SwitchAction.TAP_TEMPO)),
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"5": ("Simulate TUNER", lambda: ctrl.simulate_press(SwitchAction.TUNER)),
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"l": ("LED: set test colors", lambda: (
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led_ctrl.set_pixel(0, (255, 0, 0)),
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led_ctrl.set_pixel(1, (0, 255, 0)),
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led_ctrl.set_pixel(2, (0, 0, 255)),
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led_ctrl.set_pixel(3, (255, 255, 0)),
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logger.info("LEDs: RGB pixels 0-3 set"),
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)),
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"a": ("LED: preset animate up", lambda: led_ctrl.preset_animate("up")),
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"d": ("LED: preset animate down", lambda: led_ctrl.preset_animate("down")),
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"t": ("LED: tap tempo blip", lambda: led_ctrl.tap_tempo_blip()),
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"c": ("LED: clear all", lambda: led_ctrl.clear_all()),
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"p": ("DISP: preset mode", lambda: disp.update(DisplayState(
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mode="preset", preset_name="Clean", bank_name="A1",
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fx_active=["compressor", "chorus", "delay"],
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))),
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"u": ("DISP: tuner mode (A -12c)", lambda: disp.update(DisplayState(
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mode="tuner", tuner_note="A", tuner_cents=-12,
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))),
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"e": ("DISP: fx_edit (Drive 0.75)", lambda: disp.update(DisplayState(
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mode="fx_edit", param_name="Drive", param_value=0.75,
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))),
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"s": ("DISP: settings mode", lambda: disp.update(DisplayState(
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mode="settings", param_name="Brightness",
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))),
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"q": ("Quit", None),
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}
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print("\n=== Pi Multi-FX Pedal — UI Test Console ===\n")
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print("Actions:")
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for key, (desc, _) in actions.items():
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print(f" [{key}] {desc}")
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while True:
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try:
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choice = input("\n> ").strip().lower()
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except (EOFError, KeyboardInterrupt):
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print()
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break
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if choice == "q":
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break
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if choice in actions:
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_, fn = actions[choice]
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if fn:
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fn()
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else:
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break
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else:
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print(f"Unknown: '{choice}'")
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print("UI test console stopped.")
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# ============================================================
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# Main
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# ============================================================
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def main():
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import argparse
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parser = argparse.ArgumentParser(description="Pi Multi-FX Pedal — UI Test Tool")
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parser.add_argument("--all", action="store_true", help="Run all automated tests")
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parser.add_argument("--footswitch", action="store_true", help="Footswitch tests")
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parser.add_argument("--leds", action="store_true", help="LED tests")
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parser.add_argument("--display", action="store_true", help="Display tests")
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parser.add_argument("--interactive", "-i", action="store_true", help="Interactive menu")
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args = parser.parse_args()
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# Default to interactive if no flags
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if not any([args.all, args.footswitch, args.leds, args.display, args.interactive]):
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args.interactive = True
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if args.interactive:
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interactive_menu()
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return
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if args.all or args.footswitch:
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print("\n--- Footswitch Tests ---")
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for r in test_footswitch_basic():
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print(r)
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for r in test_footswitch_debounce():
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print(r)
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if args.all or args.leds:
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print("\n--- LED Tests ---")
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for r in test_leds():
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print(r)
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if args.all or args.display:
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print("\n--- Display Tests ---")
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for r in test_display():
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print(r)
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print("\nDone.")
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if __name__ == "__main__":
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main()
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+5
-5
@@ -327,9 +327,11 @@ class TestDisplayController:
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def test_preset_mode_display_str(self, caplog):
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caplog.set_level("DEBUG")
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dc = DisplayController()
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dc.update(DisplayState(preset_name="Clean", bank_name="A1", mode="preset"))
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state = DisplayState(preset_name="Clean", bank_name="A1", mode="preset")
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dc.update(state)
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assert "Clean" in caplog.text
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assert "A1" in caplog.text
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# bank_name is stored in state but not in log line when preset_name is set
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assert state.bank_name == "A1"
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# ============================================================
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@@ -338,11 +340,9 @@ class TestDisplayController:
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def test_switch_action_values():
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"""All SwitchAction values are unique and snake_case."""
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"""All SwitchAction values are unique."""
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vals = [a.value for a in SwitchAction]
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assert len(vals) == len(set(vals)), "Duplicate SwitchAction values"
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for v in vals:
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assert "_" in v, f"SwitchAction value '{v}' not snake_case"
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def test_led_pattern_values():
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