STM32CubeIDE can't connect (No device found on target)

[Hcorw.1]

Have been using STM32CubeIDE with several processors and different Nucleo boards with success

Acquired a Nucleo-U575ZI and when I try to download code I get:

STMicroelectronics ST-LINK GDB server. Version 6.0.0

Copyright (c) 2021, 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

       InitWhile                 : Enabled

Target no device found

Error in initializing ST-LINK device.

Reason: No device found on target.

Checked the obvious

Updated ST-Link

Checked all the jumpers

Tried different machines (that also work well with other boards/processors)

I can erase the device with STM32CubeProgrammer and it appears I can upload to just the first sector with that tool

[Hcorw.1]

Corrections - it's not the first sector that can be written to just the first 16bytes

I can do a Full chip erase with the STM32CubeProgrammer:

 14:09:16 : MASS ERASE ...

 14:09:16 : Mass erase successfully achieved

 14:09:16 : UPLOADING ...

 14:09:16 :  Size         : 1024 Bytes

 14:09:16 :  Address      : 0x8000000

 14:09:16 : Read progress:

 14:09:16 : Data read successfully

 14:09:16 : Time elapsed during the read operation is: 00:00:00.006

And the memory shows all 0xff

Created a small executable (tmp.bin) and when attempt to load it with STM32CubeProgrammer:

 14:11:14 : Memory Programming ...

 14:11:14 : Opening and parsing file: tmp.bin

 14:11:14 :  File         : tmp.bin

 14:11:14 :  Size         : 32445 Bytes

 14:11:14 :  Address      : 0x08000000

 14:11:14 : Erasing memory corresponding to segment 0:

 14:11:14 : Erasing internal memory sectors [0 3]

 14:11:14 : Download in Progress:

 14:11:14 : Error: Fail to write buffer in flash

 14:11:14 : Error: failed to erase memory

 14:11:14 : Error: failed to download Segment[0]

 14:11:14 : Error: failed to download the File

When I read the flash only the first 16bytes are written the rest are all 0xff

Following that I can no longer do a Full chip erase with the STM32CubeProgrammer

 14:12:39 : MASS ERASE ...

 14:12:40 : Error: failed to erase memory

 14:12:40 : Error: Mass erase operation failed.Please verify flash protection

until I do a reset and then I can erase again

[Hcorw.1]

Brand new board, seeing as we have a serious lack of enthusiasm for support here it looks like we should try and return it

[KoenigAdonis]

I had the same problem. I had the Nucleo board on a breadboard at the time. After taking the Nucleo board off the breadboard, debugging it was no problem anymore.

Maybe connecting it to a breadboard is short circuiting some pins.... I'm not entirely sure why it was like that.