I'm sure this is completely unsupported, but I noticed the linux kernel picks up a serial controller and adds four entries into /dev (ttyS0 through ttyS3):
[ 0.586637] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
Our application of the Fit-PC2 has some pretty demanding serial io that we are having difficulty with over USB.
I am wondering if the pins for one of these serial ports may be found on-board somewhere. I understand this is entirely unsupported but I think our team of several electrical engineers could probably figure it out if we knew where to look.
Thanks very much,