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fix(web): accept every panel size and row address type the rgbmatrix library does

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The Display form capped columns at 128 and chain length at 24, and its
submit handler (fixInvalidNumberInputs) rewrote anything larger to the cap,
so wide panels and long chains silently saved as the wrong size. The config
API checked none of the hardware numbers, so values the library rejects (odd
rows, parallel 4, PWM dither bits 3) saved and the matrix then refused to
start.

- Form limits now match the pinned library: rows even 8-64, cols >= 16 and
  chain_length >= 1 with no upper bound, parallel 1-3, PWM dither bits 0-2,
  PWM LSB nanoseconds 50-3000.
- save_main_config rejects out-of-range rows, cols, chain_length, parallel,
  brightness, scan_mode, pwm_bits, pwm_dither_bits, pwm_lsb_nanoseconds and
  gpio_slowdown with a 400.
- A stored gpio_slowdown or pwm_dither_bits of 0 renders as 0 instead of the
  default, so saving the tab no longer overwrites it.
- Row Address Type offers 5 (SM5368 / B707 row shift register). Verified on a
  Waveshare 96x48 V2 (24S-A1) on a Pi 4 with the Adafruit Triple LED Matrix
  Bonnet: rows 48, cols 96, row address type 5, BGR, GPIO slowdown 8.
- Help text and docs: FM6124-family panels use Panel Type Standard; on a Pi 5
  the library supports only row address types 0 and 2.

No change to the rpi-rgb-led-matrix submodule.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
Chuck
2026-09-15 16:50:41 -04:00
co-authored by Claude Opus 5
parent fddb0e06db
commit b26b31e320
7 changed files with 323 additions and 40 deletions
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docs/GETTING_STARTED.md
+4 -4
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@@ -83,10 +83,10 @@ You should see:
1. Open the **Display** tab
2. Set your matrix configuration:
- **Rows**: 32 or 64 (match your hardware)
- **Columns**: commonly 64 or 96; the web UI accepts any integer
in the 1–128 range, but 64 and 96 are the values the bundled
panel hardware ships with
- **Rows**: match your panel — commonly 32 or 64; any even number
from 8 to 64
- **Columns**: match your panel — commonly 64 or 96; at least 16,
with no upper limit
- **Chain Length**: Number of panels chained horizontally
- **Hardware Mapping**: usually `adafruit-hat-pwm` (with the PWM jumper
mod) or `adafruit-hat` (without). See the root README for the full list.