Hi Jan,

Ok, lemme try to clarify my project a bit more. For the SW UART, the baud rate doesn't have to be anything specific, so I'd think 9600 would probably be best as thats what the HW UART is using. I'm planning for a full duplex port, but if its easier for a half duplex one, I might consider it. As for processing time, I need to leave enough for the scheduler/keypad scanner and some simple math operations for the calculator part which isn't that much. The main purpose (besides the simple calculator functions) is to communicate serially to other projects and/or a computer. So, it just needs to scan the keypad and incoming serial characters, take some action depending on what was entered, and display a message on the LCD and send out a serial message (whats sent to LCD could be different then whats sent to the computer or other device).

I was considering putting the LCD and barcode scanner on the SW UART, however, I'll be using both quite a bit more then the second one going to a computer/other device. I'd figure leaving them on the HW UART would be best.

Also, I was looking through a book I have in my small library of electronics books ("C and the 8051") and found some code I think I might be able to adapt for my purpose. The author of the book actually posted a small .pdf file to show as an example of the book on his website that actually shows about half of the code:

http://www.candthe8051.com/C20pg220.pdf

When I get a bit more time later today, I'll post the rest of the code and maybe another one of his examples that might be even better suited.

If you could let me know the feasibility of using this C code, that would be great :-)

Thanks,
J Silverman