feat(eink): bulk SPI row writes for the GDEQ0426T82, at 8 MHz

mirror of https://github.com/MarekZegare4/MeshCore-Solo.git synced 2026-11-01 10:21:59 +00:00

GxEPD2 sends the panel RAM a byte at a time; on the nRF52's SPIM the
per-call overhead dominates, and an 800x480 partial refresh writes the
whole 48 KB several times. GxEPD2_426_GDEQ0426T82_Fast overrides the three
image writes to send each row in one transfer() call, falling back to the
stock path for the cases it doesn't cover (first write, mirror_y, PROGMEM).
Byte-for-byte the same data as the stock driver.

Opt-in per env: -D EINK_FAST_WRITES=1, and EINK_SPI_HZ (default 4 MHz,
8 MHz here, SPIM2's ceiling).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KxAZVAbhhYr18Dd4guTQM1

This commit is contained in:

pmow

2026-10-09 08:47:35 -10:00

co-authored by

Claude Opus 5.5

parent cc4774436f

commit da5ff56cff

4 changed files with 133 additions and 3 deletions

									
										solo/wio-tracker-l1-gdeq0426/platformio.ini
									
		+2
		
												View File
												
				@@ -56,5 +56,7 @@ build_flags = ${nrf52_base.build_flags}

				  -D DUAL_SERIAL=1

				  -D ENABLE_SCREENSHOT

				  -D KEEP_DISPLAY_ON_USB

				  -D EINK_FAST_WRITES=1

				  -D EINK_SPI_HZ=8000000

				  -Os

				extra_scripts = post:create-uf2.py