Hello,I write a program with asembbly for seven segment display.When ı debugged code,it ran but ı get error when I debug again I receive' a Error in initializing ST-LINK device. Reason: No device found on target.' this message .

[Ocebe.1]

How can I solve this problem.If I earse mychip maybe I can solve but I dont know how can ı do

[Tesla DeLorean]

Probably because you have reconfigured the GPIOA pins used by the debugger. ie a blind write into configuration registers, breaking PA13/PA14

To erase, select "connect under reset" option for tools, or strap BOOT0 High so it doesn't run your code.

[Ocebe.1]

when I debug my code ,at debugger options ,reset behaviour is 'connect under reset' but it doesnt work

[Tesla DeLorean]

It won't matter what setting you have if you disconnect the pins the debugger is using while it is running.

Look critically at your code

[Ocebe.1]

I understand you but in my board, boot0 pin is PA14 but I dont se on the board PA14

[Peter BENSCH]

Looks like the problem is solved, but in a community like this one, how you solved it is always interesting to other users.

When your question is answered, please close this topic by choosing Select as Best.

/Peter