how to to flash stm32mp257-DK in baremetal with cube ide ?

[maths]

STM32CubeIDE

 

Version: 2.1.1

Build: 28236_20260312_0043 (UTC)

 

How can I make sense of this ?

 

TMicroelectronics ST-LINK GDB server. Version 7.13.0 Copyright (c) 2026, STMicroelectronics. All rights reserved.  Starting server with the following options:
Persistent Mode
: Disabled
Logging Level
: 1
Listen Port Number
: 61234
Status Refresh Delay
: 15s
Verbose Mode
: Disabled
SWD Debug
: Enabled  Waiting for debugger connection... Debugger connected Waiting for debugger connection... Debugger connected Waiting for debugger connection...
-------------------------------------------------------------------
STM32CubeProgrammer v2.22.0
-------------------------------------------------------------------
Log output file:
/tmp/STM32CubeProgrammer_Xj0e11.log Error: Unable to connect to the target device, Access port is not valid. Encountered Error when opening /home/soham/st/stm32cubeide_2.1.1/plugins/com.st.stm32cube.ide.mcu.externaltools.cubeprogrammer.linux64_2.2.400.202601091506/tools/bin/STM32_Programmer_CLI Shutting down... Exit.

 

I have added the "monitor flash mass_erase" to starter as explained in this thread, 

I have set the boot switches into dev mode 0011:

 

[Duc]

Hi  @maths  ,

Have you followed this tutorial: Modify, rebuild and reload the firmware - stm32mpu ?

[maths]

yes, But

"STM32CubeIDE requires a connection to Linux running on an STM32MP2 device though a serial connection."

WHy is linux needed to write into flash ? isn't there an easier way of writing into flash ?

 It can't reach the board : " [Debugger]: The inet address '192.168.7.1' is not reachable."

The board does not have a default IP configured for its ethernet interface, I configured it but couldn't connect either.

I tried configuring the IP tables, I still can't ping the board.

 

[PatrickF]

HI  @maths  

bare-metal on cortex-A35 for STM32MP25 is not supported. It is not planned, but maybe it will come this year bare-metal support for Cortex-A35 on STM32MP21.

 

In any case, unlike STM32 MCUs, on STM32MP platforms, it is NOT possible to Flash (external Flash) using JTAG/SWD.

 

For Cortex-M33 SW, STM32MP products external Flash could be up with SSH (RJ45 or ETHoverUSB) which need to have Linux running on the platform or using USB with CubeProgrammer.

https://wiki.st.com/stm32mpu/wiki/Getting_started/STM32MP2_boards/STM32MP257x-DK/Develop_on_Arm_Cortex-M33/Modify,_rebuild_and_reload_the_firmware

 

Otherwise, OpenSTLinux image build with Yocto is flashed with CubeProgrammer using USB (no involvement of CubeIDE).

https://wiki.st.com/stm32mpu/wiki/Getting_started/STM32MP2_boards/STM32MP257x-DK/Let%27s_start/Populate_the_target_and_boot_the_image 

 

Regards.