Only first debug session is successful with STM32F405
Hello Gshera,
First, update the software, there is a 1.12 version.
Now, about CN12 on nucleo 64, it is 2 GND pins.
I suppose it is a typo error, you meant CN4, right ?
STlink Nucleo CN4 has 6 pins:
Pin 1 is STlink VDD input to measure : To connect to your VDD of custom board
Pin 2 is SWCLK
Pin 3 is GND
Pin 4 is SWDIO
Pin 5 is N_Reset to connect to the Nrst pin of your F405.
Pin 6 is SWO (not needed for debug)
Then, you should have removed the 2 Jumpers on CN2 for STLink usage as you mentionned.
Rgds,
Laurent
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