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,
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.