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fix(pi5): correct gpio_slowdown guidance — Pi 5 PIO default is 1, not 4-5

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The upstream library defaults gpio_slowdown to 1 for Pi 5 (IsPi4() ? 2 : 1).
In PIO mode the value is a pixel-clock divisor, so 4-5 was unnecessarily
conservative advice. Updated help text and error log to reflect the actual
range (1-3 typical for Pi 5 PIO; inverted effect in RIO mode).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Chuck
2026-05-18 16:27:21 -04:00
parent c48c06ffa7
commit f6e9c7688d
2 changed files with 3 additions and 3 deletions
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src/display_manager.py
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@@ -170,7 +170,7 @@ class DisplayManager:
f"Matrix initialization failed — running in fallback/simulation mode "
f"(size {fallback_width}x{fallback_height}). Error: {e}. "
"On Raspberry Pi 5: ensure rpi-rgb-led-matrix was built from the latest "
"submodule (re-run first_time_install.sh) and that gpio_slowdown is 4 or higher."
"submodule (re-run first_time_install.sh). gpio_slowdown of 2–3 is typical for Pi 5 PIO mode."
)
# Do not raise here; allow fallback mode so web preview and non-hardware environments work