Jimmy
d5cab2efdf
Pico panels get static IPs on 10.1.1.10–14 with per-panel LED counts, Makefile deploy targets, and Python examples for animations, sync tests, and direct Pi SPI control. Co-authored-by: Cursor <cursoragent@cursor.com>
65 lines
1.6 KiB
Python
65 lines
1.6 KiB
Python
"""Raspberry Pi model detection for choosing a WS2812 backend."""
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from __future__ import annotations
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from functools import lru_cache
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@lru_cache(maxsize=1)
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def board_model() -> str:
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try:
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with open("/proc/device-tree/model", "rb") as f:
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return f.read().rstrip(b"\x00").decode("ascii")
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except OSError:
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return "Unknown"
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@lru_cache(maxsize=1)
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def board_family() -> str:
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model = board_model().lower()
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if "raspberry pi 5" in model:
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return "pi5"
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if "raspberry pi 4" in model:
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return "pi4"
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if "zero 2" in model:
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return "pi_zero2"
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if "zero" in model:
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return "pi_zero"
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if "raspberry pi 3" in model:
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return "pi3"
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return "unknown"
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def supports_ws281x() -> bool:
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return board_family() != "pi5"
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def pio_device(index: int = 0) -> str | None:
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from pathlib import Path
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path = Path(f"/dev/leds{index}")
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return str(path) if path.exists() else None
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def pio_available() -> bool:
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return pio_device(0) is not None
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def pi5_second_spi_bus() -> int:
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"""
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Second strip on Pi 5 SPI — prefer spi1 from dtoverlay=spi1-3cs
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(/dev/spidev1.0, MOSI on GPIO 20). Falls back to built-in spidev10.0.
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"""
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from pathlib import Path
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if Path("/dev/spidev1.0").exists():
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return 1
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if Path("/dev/spidev10.0").exists():
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return 10
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raise RuntimeError(
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"No second SPI device found. Add to /boot/firmware/config.txt under [all]:\n"
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" dtoverlay=spi1-3cs\n"
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"Then reboot. Wire strip 1 DIN to GPIO 20 (SPI1 MOSI).\n"
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"Note: dtparam=spi1=on is ignored on Pi 5; use the overlay in [all], not [cm5]."
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)
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