Here’s a great and simple project using a Papilio One and a pcDuino together for the purpose of making a USB to 3.3V TTL RS232 adapter. This is from Mike Field’s site Hamsterworks where he’s got a full project description and the code to go along with it! Mike says,
[jbox color="blue" vgradient="#fdfeff|#bae3ff"]I’ve got a pcDuino and sometimes it is nice to have access to the serial console. Although you wouldn’t want to dedicate a board to it it is perfect for occasional use. As a bonus, due to the flexibility of the FPGA’s I/O pins you can use it for multiple different I/O standards and voltages – If you change to IOSTANDARDs and maybe the Vco jumper you have also got yourself 2.5V or 1.2V CMOS to USB adapter!
Cool project, Mike. It just so happens that we are now selling the pcDuino to compliment our own Gadget Factory product line-up, you can check it out in all its glory here.