STM32H745XI Dual Core External Bootloader

[user4711]

Hello,

I have developed a external Loader for my custom projekt. It uses a W25Q128 QSPI conected to bank 2 and alternative Pin of CLK. (Worse!, but it is so...) So i Have no exactly example for it. Also it is a Dual Core, and no example i find have special definitions for it.

I worked more days on it and it worked perfekt (now!) in a Cube Projekt.

Erase, write and read (manual) and memory mapped mode are perfect.

If I compile the stldr file, I can load ist in Cube programmer and stm prog utility.

But then I could cry. I can't do anything. No read on QSPI and so on.

....

I think i will have trouble with the m4 Core. The M7 Core must wait for him.

I don't know. How you can help me. What is wrong. Have you any Idea?

[user4711]

anything else

[user4711]

Have anyone an Idea?

[Tesla DeLorean]

The Bus Matrix has the QUADSPI on the CM7 side, that's where the code is running.

I don't see that being on BANK2 (BK2) would introduce any particular issues.

PB2:AF9 CLK

PC11:AF9 NCS

PH2:AF9 D0

PH3:AF9 D1

PG9:AF9 D2

PG14:AF9 D3

I'd probably look at how it's build, and the .LD for the single core H7 would suffice.  https://github.com/cturvey/stm32extldr/blob/main/ExternalLoader.ld

I would not use or create dependencies on Interrupts, Vector Table, startup.s initialization nor main() entry.

I'll map your pin definitions into an existing build and see where it gets us..

[Tesla DeLorean]

Try   https://github.com/cturvey/stm32extldr/blob/main/h7_w25q128/CLIVEONE-W25Q128_STM32H7XX-PB2-PC11-PH2-PH3-PG9-PG14.stldr

[user4711]

Super great, thank you. But can you tell me how you did it. The file is only 8kb! I would like to modify the whole thing and integrate LEDs and other tasks.

Can you send me the relevant files as source code so that I can make a cube project.

Thanks again

[Tesla DeLorean]

It is part of a larger project for which source is not generally provided.

The files are smaller as a lot of junk and dead code has been removed, but is basically an optimal HAL implementation in GNU/GCC