step 0:

didn't connect it yet , and hope i didn't screw-up with timing thingi
but if all goes well i like to ask a direction to go as it F411 500K code and 120K ram, and lot of calc. power ...
ping A0-A7 available, though of option to measure voltage that would give internal device temperature for correction ...
and i think 2-3 dig. pins, one of them I think to change the mode AR488 / USBTMC (USB488)
due to emulation of com port speed you can see: 921000 , quite fast ..