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mangavalkandClaude Opus 5.5 7a28e34380 Fix dense images on the Nano and the off image in slow mode

- Nano: B data is drawn fast enough for the serial line. A hex digit arrives
  every 87 us; with a division and four drawPixel() calls per digit a lit
  digit took about 105 us, so dense frames (all yellow, the panda bitmap)
  overflowed the 64 byte receive buffer: frames not shown or wrong, "Line
  too long", frame check repairs that failed the same way. Now the parser
  counts columns and rows and BROSE9323::drawDots() sets the 4 dots
  (about 20 us).
- ESP32: Power off and the start of the night draw the off image also when
  slow mode had the power off already (it powers on for it, once)
- Tests: drawDots() against drawPixel(), off image in slow mode
- Version 2.19.3

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

2026-10-22 00:24:14 +02:00

BROSE9323.cpp

Fix dense images on the Nano and the off image in slow mode

2026-10-22 00:24:14 +02:00

BROSE9323.h

Fix dense images on the Nano and the off image in slow mode

2026-10-22 00:24:14 +02:00

buffer_crc.h

Fix shifted pictures: non-blocking Nano drawing, frame check, refresh settings

2026-10-16 15:20:26 +02:00

dot_sequence.h

Refresh effect per page

2026-10-17 16:57:31 +02:00

frame_commands.h

Send only the changed dots of a frame to the Nano

2026-10-15 21:14:48 +02:00

README.md

Add HA dropdowns, off image, flip fixes and refresh effects

2026-10-15 01:29:01 +02:00

README.md

BROSE9323 driver

An Adafruit_GFX driver for Brose flipdot panels, shared by both firmware targets. The constructor is BROSE9323(width, height, panel_width, flip_time_us = 280). This project uses BROSE9323 display(84, 19, 28).

Build modes

Flag	Used by	Behaviour
(none)	Nano	Drives the panel through GPIO. Keeps an old and a new frame buffer and flips only the dots that changed.
`-D ESPSERIAL`	ESP32	Holds no buffer. `drawPixel`, `fillScreen`, `display` and `setTiming` are sent as serial commands to the Stream passed to `begin(&Serial)`.
`-D FLIPDOT_PLCC_ADAPTER`	Nano (optional)	Uses the pin mapping of the PLCC adapter board.

The flags are set per environment in platformio.ini through build_flags. Don't #define them in the header.

Notes

In direct mode (setDirect(true)) every pixel is flipped right away, without a call to display().
setGap(us) adds a pause after each flip pulse, setPulses(n) pulses each changed dot n times. Full redraws (display(true), the first display() after boot) pulse the dots that look unchanged only once.
setEffect(effect, ms): how display() shows a frame (RefreshEffect in dot_sequence.h). Anything but EFFECT_INSTANT runs in steps from update(), which must be called often; busy() says whether an effect is running. display(true) is always instant. On the ESP32 these calls become the G, N and E commands.
print() maps German umlauts (ÄäÖöÜüß) to the code page 437 glyphs used by the GFX font.
On an ATmega168 the old buffer is left out to save RAM. Every display() call then flips all dots.