Chuck 488c6b3340 fix(pi5): auto-detect Pi 5 and force rgbmatrix rebuild when rp1_rio missing ...

first_time_install.sh:
- Detect Pi 5 from /proc/device-tree/model at startup
- Step 6 skip logic now also checks hasattr(RGBMatrixOptions(), 'rp1_rio'):
  if the installed library lacks rp1_rio (built before Pi 5 support was added)
  the build is forced even when the module is already importable. This is the
  root cause of mmap errors to 0x3f000000 (Pi 3 bus) on Pi 5 hardware.
- After a successful Pi 5 build, verify rp1_rio is present and print a
  diagnostic with the submodule update command if it's still missing.

src/display_manager.py:
- rp1_rio warning now names the symptom (mmap to 0x3f000000) and gives the
  exact fix command so users can act immediately from the log.

README.md:
- Remove "Pi 5 is unsupported" — Pi 5 is fully supported since the library
  submodule includes rp1_pio and rp1_rio backends.
- Document the forced-rebuild command for users migrating from Pi 4.
- Fix gpio_slowdown guidance: Pi 5 PIO mode uses 1–2, not 5.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-05-19 20:33:21 -04:00

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