I have this strange problem... When I connect TX and RX pins together (GPIO 14 and GPIO 15, Rev1) and I run minicom, I see everything that I type... so it works.
But when I connect TX RX with an USB FTDI cable to my laptop and run minicom too, I can only receive what it is typed on RPi but not the other way around.
I have connected both Grounds because otherwise it doesnt work at all.
Have I fried my Pi? I was messing with a project which involves 12Volts... I hope didn't damaged it...