Picbits Sales wrote:
> I'm interested in porting over some of my applications from the 18F series which use serial RS232 to communicate with the outside world.
> 
> My requirements are quite simple - I want to plug an 18F4550 or similar into a PC USB port and have it recognised as a virtual com port.
> 
> I don't need anything spectacular - I want to send and receive either packets of RS232 information or single bits (either will do).
> 
> I've gone round in a few circles trying to work out the best way of doing this. I've had a look at the Microchip CDC firmware but I'm not a "C" man - I work in assembly.
> 
> So to sum it up - I need a no frills USB to RS232 routine where I can send the routine a byte or packet of data and the PIC will send it out to the PC via USB emulating an RS232 controller. Likewise when the PC sends a byte back to the PIC through a virtual com port or packet of data the PIC receives this through the USB and I can read it on the PIC.
> 
> All the code routines I've found so far have either been in 'C' or had lots of bells and whistles attached. If I have to spend a few weeks learning 'C' then I will but thought I'd pick your wonderful brains first.
> 
> Thanks
> Dom

This is the only asm usb code I've seen

http://pe.ece.olin.edu/ece/projects.html
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