Wrong internal LUT command length
SPI DMA transfer not available
EPD LUT not applied
Incorrect LUT upload command
Incorrect LUT upload command
EPD LUT not applied
BUSY EXTI only triggers once
Fixed by adding priority settings before FreeRTOS kernel started. https://git.minori.work/STM32_Projects/STM32H750VB_EPD/src/branch/master/Core/Src/user_tasks.c#L41
BUSY EXTI only triggers once
BUSY EXTI only triggers once