Unable to connect to target device - STM32H7S3L8H6 (NUCLEO-H7S3L8)

neo-knight-td · ‎2025-05-05

Dear all,

I have purchased the NUCLEO-H7S3L8. I am facing an issue when trying to debug a basic (blank) project. The Debugger is unable to connect to the target. Here is the console output :

"

STMicroelectronics ST-LINK GDB server. Version 7.10.0

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

InitWhile : Enabled

Waiting for debugger connection...

Debugger connected

Waiting for debugger connection...

Debugger connected

Waiting for debugger connection...

-------------------------------------------------------------------

STM32CubeProgrammer v2.19.0

-------------------------------------------------------------------

Log output file: /tmp/STM32CubeProgrammer_fldzzj.log

ST-LINK SN : 0020002B3433511830343835

ST-LINK FW : V3J16M7

Board : NUCLEO-H7S3L8

Voltage : 3,30V

SWD freq : 8000 KHz

Connect mode: Under Reset

Reset mode : Hardware reset

Device ID : 0x485

Revision ID : Rev B

Device name : STM32H7RSxx

Flash size : 64 KBytes (default)

Device type : MCU

Device CPU : Cortex-M7

BL Version : 0xE4

Opening and parsing file: ST-LINK_GDB_server_YZEder.srec

Memory Programming ...

File : ST-LINK_GDB_server_YZEder.srec

Size : 6.39 KB

Address : 0x08000000

Erasing memory corresponding to sector 0:

Erasing internal memory sector 0

Download in Progress:

File download complete

Time elapsed during download operation: 00:00:00.057

-------------------------------------------------------------------

STM32CubeProgrammer v2.19.0

-------------------------------------------------------------------

Log output file: /tmp/STM32CubeProgrammer_MGG0Vd.log

Error: Unable to connect to the target device, Access port is not valid.

Encountered Error when opening /opt/st/stm32cubeide_1.18.1/plugins/com.st.stm32cube.ide.mcu.externaltools.cubeprogrammer.linux64_2.2.100.202412061334/tools/bin/STM32_Programmer_CLI

Error in STM32CubeProgrammer

Shutting down...

Exit.

"

The project I am trying to debug is the standard code generated when creating a new project in STM32CubeIDE. The only thing I changed is the Debugger Configuration (I changed it iaw this guide : https://community.st.com/t5/stm32-mcus/stm32cubeide-how-to-debug-an-stm32h7rx-sx-project-without/ta-p/737120).

I have already tried a mass erase (using the BOOT0 pin and STM32 Programmer) but the issue persists.

Can someone assist me on how to launch a Debug session (even from an Example project) with the NUCLEO-H7S3L8 ?

KDJEM.1 · ‎2025-05-05

Hello @neo-knight-td and welcome to the community;

Are you able to connect your board using STM32CubeProgrammer toolchain?

Could you please

Try to refer and follow the steps shared in this FAQ: How can I recover my STM32H7 board after facing a power configuration deadlock?
Try to upgrade Firmware using STM32CubeProgrammer and erase external memory.
If you run an STM32Cube_FW_H7RS example, it is recommended to check the readme file for the HSLV bits level. Please take look at this FAQ.

I hope this help you.

Thank you.

Kaouthar

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

AScha.3 · ‎2025-05-05

Hi,

so you are on a Linux system, IDE 1.18.1 ; can you debug any other board ?

because maybe your system missing the outdated libs, libncurses.so.5 etc, IDE still expects.

Read here in forum about solutions... just search : libncurses.so.5 .

If you feel a post has answered your question, please click "Accept as Solution".