STM32H7S7L8 MCE unable to write

[Hamady]

Hello everyone,

I'm working on STM32H7S7L8 custom board with same architecture as the DK board ( for XSPIM)

The mcu and flash is working fine i can uplaud a boot/appli without issue (touch gfx + lwip work so the hardware is fine)

But working on the FW 1.3.0 I'm unable to make MCE work.

I followed step by step the MCE workshop : https://github.com/ST-TOMAS-Workshop/stm32h7s_workshop/blob/main/3_external_memory_encryption/external_memory_encryption.md

But when I build the extmem loader and try to uplaud the code I got :

Weird thing is that i already made MCE work on the DK board without issues but here it is not possible

Log output file:   C:\Users\hdia\AppData\Local\Temp\STM32CubeProgrammer_a46772.log
ST-LINK SN  : 002600493234510936303532
ST-LINK FW  : V3J16M7B5S1
Board       : STLINK-V3SET
Voltage     : 3.31V
SWD freq    : 8000 KHz
Connect mode: Under Reset
Reset mode  : Hardware reset
Device ID   : 0x485
Revision ID : Rev Y
Device name : STM32H7RSxx
Flash size  : 64 KBytes (default)
Device type : MCU
Device CPU  : Cortex-M7
BL Version  : 0xE3



Opening and parsing file: ST-LINK_GDB_server_a46772.srec


Memory Programming ...
  File          : ST-LINK_GDB_server_a46772.srec
  Size          : 1019.57 KB 
  Address       : 0x90000000


Erasing memory corresponding to segment 0:
Erasing external memory sectors [0 133]
Erasing memory corresponding to segment 1:
Erasing external memory sectors [512 633]
Download in Progress:


File download complete
Time elapsed during download operation: 00:00:32.050



Verifying...




Error: Data mismatch found at address  0x90000001 (byte = 0x00 instead of 0x30)


Time elapsed during verifying operation: 00:00:01.517


Error: Download verification failed


Encountered Error when opening C:\ST\STM32CubeIDE_1.19.0\STM32CubeIDE\plugins\com.st.stm32cube.ide.mcu.externaltools.cubeprogrammer.win32_2.2.300.202508131133\tools\bin\STM32_Programmer_CLI.exe
Error in STM32CubeProgrammer
Shutting down...
Exit.

Here the Cube MX settings that i used to make it (SBS also enabled in cube programmer / Cube MX ) and 192kb of DTCM setup

Do you have an Idea to make it work.

Thanks 

[Imen.D]

Hello @Hamady 

Perform a full chip erase, also make sure that your board has stable power supply.

[Hamady]

Hi @Imen.D 

The board has a good power supply since i can uplaud a code to the flash without MCE

Thanks

[Hamady]

Hi @Imen.D 

I tested the code on discovery board so hardware is fine.

It really seems that the new firmware pakage create a isssue with MCE . i created a new proejct and the EXTMEM Loader works only without MCE. 

Here my project 

Thanks