Quote Originally Posted by jellis00 View Post
Thanks for your input Darrel. Unfortunately the reason I need to use a USB interface is the the user of this only has a laptop that doesn't have a serial port....only USB port. If I did it as a USB CDC on the PIC side, wouldn't he have to use one of the USB to Serial adaptor cables....which I know from experience don't always work that well.
No, not at all.
You connect it to the PC's USB bus, just like you would with HID.
But to the PC it looks like a COM port. So just about any PC program that works with RS232 will work with USB.

Squibcakes started this thread on CDC ...
USB CDC Communications for Dummies!
http://www.picbasic.co.uk/forum/showthread.php?t=5806

I added an update for 2.60 with a servicing routine ...
http://www.picbasic.co.uk/forum/show...0301#post80301

The USB_ASM_SERVICE isn't compatible with DT_INTS, but the handler is, so it will be easy to modify, since I already know you're using them.