Nucleo-H755ZI-Q ethernet without RTOS on M7 core - how to
Hello STM32 friends!
Board: Nucleo-H755ZI-Q
Core used for LWIP: M7
Goal: LWIP without RTOS
(UPDATE below: I solved my own question, find it on github, hope to help somebody with it)
I have followed many posts on the ethernet topic, but for a long time I was unable to get lwip working on the Nucleo-H755ZI.
I got it working on an F7 and H7 (without RTOS) a long time ago, back when TrueStudio was still in use.
Now that I'm using the latest STM32CubeMX 6.11.1, STM32CubeIDE 1.15.1 and the latest H7 firmware 1.11.2, I can't seem to get it to work.
I've been following a lot of good posts on this topic and taking a lot of notes.
Since I've been struggling for days, I posted a simple project on GitHub.
The project includes a flashing LED to indicate that the M7 core has started and is running (not hanging in an error handler).
If it only responds to ping requests, I'll be very happy.
I will then add a TCP and UDP server and client to it, and perhaps an HTTP server.
My little project is posted here:
https://github.com/AngryCarrot61/NUCLEO-H755ZI-Q_003_ETH
In the MD file, I posted things I adjusted.
I realize when things do not work as expected, it's time to learn something.
At the same time, I hope to help others with the same issue.
I hoped sombody could enlighten me.
I got it working: I almost can't believe the rooot cause, and verified it:
This
.lwip_sec (NOLOAD) : {
. = ABSOLUTE(0x30040000);
*(.RxDecripSection)
. = ABSOLUTE(0x30040060);
*(.TxDecripSection)
. = ABSOLUTE(0x30040200);
*(.RxArraySection)
} >RAM_D2
Should not go into
STM32H755ZITX_RAM.ld
but into
STM32H755ZITX_FLASH.ld
So that's why it took me almost forever to get it working!
Example without RTOS:
https://github.com/AngryCarrot61/NUCLEO-H755ZI-Q_003_ETH
Example with RTOS
https://github.com/AngryCarrot61/NUCLEO-H755ZI-Q_003_ETH_RTOS
As usual, it seems very easy!
If I only didn't start looking at STM32H755ZITX_RAM.ld only because of its existence, for the definition of the memoy regions.
Enjoy it!
Cheers, Jack.
