I found this video where an already made interface is shown. Apparently, that is very user-friendly. But does it what I'm trying to achieve? For example, if I want to save the value 0x3B in register R16, could I use that software to do it via USB?
Also, I don't know how to connect the USB with the microcontroller pins. I've found this image
but I would have expected the pins TXD and RXD to be used. Is this connection alright?
Sorry if the question is a bit messy, I'm a beginner with this stuff. If you need any further information please let me know.