Cory, Here's a Philips 8051 list - this is the address to post questions etc to. forum@ibsystems.com Cant remember how to subscribe but if you post your question and also ask how to subscribe they will probably get back to you. This of course begs the question, why aren't you using a PIC with internal UART? :-) regards Russell McMahon -----Original Message----- From: Dennis Plunkett To: PICLIST@MITVMA.MIT.EDU Date: Wednesday, June 23, 1999 10:29 AM Subject: Re: [OT] 8031 & 16550 UART INTERFACE & PROGRAMMING >At 12:17 22/06/99 -0500, you wrote: >>I have a project of interfacing and programming an Intel 8031 and a 16550 >>based UART. Currently, I can transmit to another port ( on a separate >>computer) with no problem. My down fall is on the receiving end of the >>task. I get framing and overrun errors even when I use the internal loop >>back test. I'm not normally this stumped. >>Has anyone else completed this task? >>Does anyone know of a 8031/8051 group with a large knowledge like this where >>guys aren't asking how a resistor works like the basic stamp site? >>I'm not trying to flame those who are out there and trying to gain basic >>knowledge, I welcome it! I do, from time to time however, need a more >>advanced group of individuals that have been down a road I have not taken. >> >>Thanks in advance for your help >> >>Sincerely, >> >>Cory M. Kutchera >> >> > > >These errors indicate that you have not read the data out from the UART in >time. Are you suing the FIFO, or are you reading it byte by bte? >How do you read the data out, under interrupt or by polling? Please provide >a bit more information > >P.S In answer to your question I have connected these two devices together >before, but a 1450 was the base UART (Many years ago) and the FIFOs where >not used > >Dennis >