I have a problem with GDB debugger on stm32F401re, i can't connect to target because it is not found. How can i resolve?

[MM..1]

Maybe your MCU is in low power mode or code used SWD pins. Enable under reset and low power debug.

[GGeno.1]

In the directory of mcu i have found the file FAIL.TXT with this message:

"The interface firmware FAILED to reset/halt the target MCU"

[GGeno.1]

Thank you for the answer... I have this configuration... there are already under reset and low power debug.

[MM..1]

Maybe you have STLink Clone without reset line or your stlink need upgrade firmware.

[GGeno.1]

I have already done upgrade firmware, the problem is happened after a session of debug on the firmware with SYS debug disable in the configuration...could be this the cause?

[MM..1]

STSW-LINK007 - ST-LINK, ST-LINK/V2, ST-LINK/V2-1, STLINK-V3 boards firmware upgrade - STMicroelectronics ?

RDP Level?

Power off board between try.

[GGeno.1]

I have tried but the problem persist.

[Markus GIRDLAND]

Hello there,

If you go into your Debug Configuration and in the "Debugger" tab under the "Misc" category there's a checkbox called "Log to file:".

Could you enable that, launch a new debug session and then send that log to me?

[MM..1]

First check in ST Link utility or Proggrammer GUI if you can connect to your board.

If yes then maybe your launch file is from other PC, try delete it and create new launch.