Good morning


I have a problem very strange with mi Jlink and i was hoping that you could help me


I will put you in context:


I am using a Jlink EDU for a proyect that i am doing at home, but when i debug the following happens to me


- WHen i go into debug or do a reset from the IDE, it goes to a wrong memory location (attach screenshot).
if i put the pc the correct memory location, it debugs correctly but when i do a reset from the IDE, it backs to the wrong location (yes its always the same).
if i program the MCU, and i get it to run withouth the IDE, flasher connected, all works fine.


- I have tried various configurations and reviewed posts and I don't see the problem.
- I have checked that the flash settings are correct.
- I have tried to uninstall the IDE and the Jlink Driver.
- I have tried in other computer.
- I have tried others versions (MDK 5.32, JLink 6.88a).


I am using this versions:
- uVision MDK 5.33
- MCU: STM32G484
- Jlink Software: 6.94b



What can I do?
what could be happening to me to make me start in this position?


Thank very much for you help
Kinds Regards

Hi Fabian,


Thanks for you repply.


Tomorrow i will send you the information you request
But i think that the error come by other side, i tell you:


I tried to downgrade firmware version of the jlink EDU (to 6.88a) for if have some problem with the actual 6.94.
When i did it i had the next error:

i attach image.

I was surprised because i was working with it without problem.
I checked the connection from jlink commander and i followed the pasos to test the connection without any problem.
I have also tried the following:


- reset conf - without any result
- exec invalidatefw + usb - it works correctly, and i can upgrade / downgrade the firmware of the jlink, but the error persist


Thesse errors could be linked?


Thank you very much for your help
I belive that it is becomming in a support case, and maybe i should open a ticket.

Hi Fabian,

Thanks for you answer so quickly and help me.
I appreciate so much.

If i am honest, now worry the problem that i cant use the Jlink EDU with the Jlink Configuration (yesterday attach a screenshot)

What i can do?
I test the solutions that i told you yesterday, and looking in the forum similar cases but it has not worked

Regarding the problem of the memory debug address:
According to what you say, i have test with other app, with the same MDK (version), and the problem is the same.
I dont belive that be the app, because of before it worked. For this proyect i worked with git, and i had tested all tags, with the same result. Also i tested a STM example.

By other hand, i did all test you request me:

- Attach the logs (Jlink Command - JlinkARM.log, MDK JlinkLog.log)
- I did the test reset + regs (Screenshots: reset_1, reset_2, reset_3)
- Check what is located at the Address the device jumps to after reset? Its No code. I dont know what its.
Is it the HardFault handler? No, and also its some error handler.
- Could you please use the J-Link Commander (JLink.exe) to connect to the device (STM32G484) and enter "r" (resets the device).
This should output the current register values. Could you send us a screenshot of the full commander output?
I attach the screenshot ("reset_jlink_commander")


Thanks again for helping me and reading me
Kinds Regards

Good afertnoon Fabian,


Thank you for your answer.


I have checked that the problem is not in the jlink, if not the problem was a external supervisor (chip) that is damaged and afect at the reset line.


I desoldered it and i checked that this didnt happen.
I replacec by other and and all work correctly.


Thank you very much for your help
The post can be closed.


Note:
- I will open another post for the Jlink configurator problem that I don't know why I can't configure the device.