Refine calibration, chase, and spin patterns and add spin test

Increase calibration brightness, update chase to use the new logical ring abstraction, and make spin start from a cleared frame with symmetric arm speed, alongside a dedicated on-device spin test script.

Made-with: Cursor

pico/test/test_spin.py

@@ -0,0 +1,128 @@
+"""
+On-device test for the Spin pattern using mpremote and Presets.
+
+Usage (from pico/ dir or project root with adjusted paths):
+
+    mpremote connect <device> cp src/*.py :
+    mpremote connect <device> cp src/patterns/*.py :patterns
+    mpremote connect <device> cp lib/*.py :
+    mpremote connect <device> cp presets.json :
+    mpremote connect <device> cp test/test_spin.py :
+    mpremote connect <device> run test_spin.py
+
+This script:
+  - Instantiates Presets
+  - Creates a few in-memory spin presets with different parameters
+  - Runs each one for a short time so you can visually compare behaviour
+"""
+
+import utime
+from presets import Presets, Preset
+
+
+def make_spin_preset(
+    name,
+    color_inner,
+    color_outer,
+    rate=4,
+    delay_ms=30,
+    margin=0,
+    brightness=255,
+):
+    """Helper to build a Preset dict for the spin pattern."""
+    data = {
+        "p": "spin",
+        "c": [color_inner, color_outer],
+        "b": brightness,
+        "d": delay_ms,
+        "n1": rate,    # expansion step per tick
+        "n2": margin,  # margin from strip ends
+        "a": True,
+    }
+    return name, Preset(data)
+
+
+def run_preset(presets, name, preset_obj, duration_ms):
+    """Run a given spin preset for duration_ms using the existing tick loop."""
+    # Start each preset from a blank frame so both sides are balanced.
+    presets.select("off")
+    presets.tick()
+
+    presets.presets[name] = preset_obj
+    presets.select(name)
+
+    start = utime.ticks_ms()
+    while utime.ticks_diff(utime.ticks_ms(), start) < duration_ms:
+        presets.tick()
+        utime.sleep_ms(10)
+
+
+def main():
+    presets = Presets()
+    presets.load()
+
+    # Ensure we start from a blank frame.
+    presets.select("off")
+    presets.tick()
+
+    print("Starting spin pattern test...")
+
+    # Use strip 0 length to derive a reasonable margin.
+    ref_len = presets.strip_length(0)
+    margin_small = ref_len // 16 if ref_len > 0 else 0
+    margin_large = ref_len // 8 if ref_len > 0 else 0
+
+    spin_presets = []
+
+    # 1. Slow spin, warm white to orange, small margin
+    spin_presets.append(
+        make_spin_preset(
+            "spin_slow_warm",
+            color_inner=(255, 200, 120),
+            color_outer=(255, 100, 0),
+            rate=2,
+            delay_ms=40,
+            margin=margin_small,
+            brightness=255,
+        )
+    )
+
+    # 2. Medium spin, cyan to magenta, larger margin
+    spin_presets.append(
+        make_spin_preset(
+            "spin_medium_cyan_magenta",
+            color_inner=(0, 255, 180),
+            color_outer=(255, 0, 180),
+            rate=4,
+            delay_ms=30,
+            margin=margin_large,
+            brightness=255,
+        )
+    )
+
+    # 3. Fast spin, white to off (fade outwards), no margin
+    spin_presets.append(
+        make_spin_preset(
+            "spin_fast_white",
+            color_inner=(255, 255, 255),
+            color_outer=(0, 0, 0),
+            rate=6,
+            delay_ms=20,
+            margin=0,
+            brightness=255,
+        )
+    )
+
+    # Run each spin preset for about 6 seconds
+    for name, preset_obj in spin_presets:
+        print("Running spin preset:", name)
+        run_preset(presets, name, preset_obj, duration_ms=6000)
+
+    print("Spin pattern test finished. Turning off LEDs.")
+    presets.select("off")
+    presets.tick()
+
+
+if __name__ == "__main__":
+    main()
+