Radek

file Configuration_adv.h 

@StrawberryD24 Yes, you are right, the description of the pins on the cse does not match the definition of the pins in the pin file. @bigtreetech, can you comment on...

if you think that there is a poorly defined set of pins in Marlin, create a ticket in the Marlin repository with a request for a correction, or propose a...

https://github.com/bigtreetech/Marlin/tree/SKR-mini-E3-V3.0-G0B1/Marlin Compile your own

If the problem is only with the 5V supply, the SKR could still be saved. You ask if the SKR controller should power the Pi, but you didn't say what...

Look here https://github.com/bigtreetech/BIGTREETECH-SKR-V1.3/issues/556 Another board similar problem. The 5V power supply has burned out. Replaced by an external 5V module. 

You have the wrong serial port in Marlin. You have to set serial port 2 for example: #define SERIAL_PORT 2

Possible causes of your problem. - Defective serial cable. - wrongly connected (rotated) serial cable - Unconfigured serial port (2) in marlin - set different transmission speed on SKR and...

https://github.com/bigtreetech/BIGTREETECH-TFT35-V3.0/issues/120

I still have a question.. Will the bin file be renamed to cur after the marlin update? After switching to marlin mode, is marlin functional?