Hey Octospi experts,
I just got an external quad-SPI SRAM (AP6404L-3SQN) running via the H723's Octospi.
At least mostly...
No HAL use, only direct register settings (except for writing via DMA, still using HAL_MDMA_Start_IT() to trigger the transfer).
Right now Memory-Mapped reading* is working, so does DMA writing.
And good that I tested with write / read buffers > 1024, the SRAM's page size, so that I found the page wrap problem early.
Question:
There are many STM32 registers concerning WRAP stuff, but can I set these up so that I don't need any other precautions vs page wrapping?
Esp. when doing memory-mapped reading (with the 8 byte limit) and DMA writing (probably not, as the ref manual says)?
Before spending another week on that and wrecking my nerves, I better ask here.
I honestly admit that I don't really understand the (slightly thin) documentation about the wrap part in the ref manual (RM0468, pg 923) - and I experienced that this is not always 100% reliable.
* Memory-Mapped writing is NOT working 100% reliable (sometimes it does...), as expected after advice from AP-Alex and this thread:
https://community.st.com/s/question/0D53W00000iCq1hSAC/stm32h723-problem-with-serial-ram-in-memory-mapped-mode?t=1674625319580
