07-26-2016, 07:44 PM
update : found a pl2303 usb to serial converter laying around and I started my tests...
9600 8 1 n
nothing seems to come out from the usb port in any phase .
something interesting happens instead on the headphones output connector , I can see a character flow and I think its only a matter to find the right bps speed cause now I just see rubbish going through the serial port , that usually means a wrong data connection speed.
anyway the rubbish data flow looks to have a fixed behaviour that looks promising