The 7.5" 800x480 dashboard (GxEPD2_750_T7) rendered blank: it is a UC8179 /
GD7965 controller, but the panel config claimed controllerFamily 'ssd168x',
so the SSD168x decoder (which only reads 0x24/0x26/0x44/0x45) ignored its
0x10/0x13 DTM stream.
- Add a Uc8179 decoder (worker Uc8179EpaperSlave + browser Uc8179Decoder).
UC8179 is the same UltraChip command family as the UC8159c (0x10/0x13 DTM,
0x12 refresh) but mono (1 bit/px). GxEPD2 writes the visible image to 0x13
(DTM2 "current"; 0x10 is the ignored "previous"), framed by 0x91/0x90
(partial window, pixel coords MSB-first)/0x13 data/0x92. Data lands at
absolute pixel coords inside the window, so compose is just the RAM. The
Frame reuses the SSD168x palette (0=black, 1=white) so paintFrame renders it.
- EPaperPanels.ts: add the 'uc8179' family and point epaper-7in5-bw at it.
EPaperPart.ts + esp32_worker.py dispatch 'uc8179' to the new decoder.
- Fix the BUSY polarity: UC8179 (like the UC8159c) idles BUSY HIGH, not LOW.
The worker seeded BUSY LOW for every non-uc8159c panel, so GxEPD2_750_T7's
_PowerOn()/_InitDisplay() busy-wait timed out (~10 s, "Busy Timeout!") on
every refresh. Now _PowerOn returns in ~129 us.
- esp32_worker.py: the runtime sensor_attach epaper path still emitted the
epaper_update payload nested under 'data' (the old double-wrap bug); emit
it flat like the init path.
The 5.65" ACeP UC8159c example already rendered (it has its own decoder and
got the WS-plumbing fix); verified the 7 colour bars are correct.
- Implement UC8159cDecoder for handling 7-colour ACeP panels.
- Introduce painting functions for UC8159c frames in EPaperPart.
- Update EPaperPart to handle both SSD168x and UC8159c frame types.
- Add integration tests for EPaperPart and UC8159cDecoder.
- Create example sketch for 5.65" ACeP 7-colour panel.
- Enhance error handling in test cases for library dependencies.
- Introduced EPaperPanels.ts to define configurations for various ePaper panels including dimensions, refresh rates, and controller details.
- Implemented SSD168xDecoder.ts to handle the decoding of SPI commands for the SSD168x family of ePaper displays.
- Created EPaperPart.ts to manage the simulation of ePaper panels, integrating with the existing simulator architecture and handling events.
- Added example sketches for 2.13", 2.9", 4.2", and 7.5" ePaper displays, demonstrating basic functionality and text rendering.
- Ensured compatibility with AVR, RP2040, and ESP32 platforms, with appropriate pin configurations for each.
David Montero Crespo