You mentioned you " take away the jumper that allows T_NRST to be connected to ST-LINK", would you confirm which jumper you removed? BTW, if you assume it's impacted by the NRST, another way is to monitor this signal to see if there is a drop when th...

From hardware point of view:1. STLINK V2 VS STLINK V3, the main point is speed. 2. I reminder you that pin17(VFBSMPS) is an input pin, not a power pin.3. Normally, if it's a first design your side, to reserve some 0R would be better, easier to debug.

I recommend you for do these steps:Step1: with default status of the board, after the board powered successfully, using a serial terminal to see the data, and confirm "is it in good status".Step2: do the "close the ST-Link connection" action, to see ...

In the default design, LD6 is not programmable. if you want to program LD6, the way is :Step1: To remove R9.Step2: To connect a GPIO(you can use resource from Arduino connector) to LD6 directly.Step3: Program the GPIO you use.Note that, brightness of...