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[DPRG] serial baudrate converter

Subject: [DPRG] serial baudrate converter
From: Ed Okerson eokerson at texasconnect.net
Date: Wed Sep 8 14:02:42 CDT 2004

According to my handy dandy AVR selection guide, an ATMEGA162 should do
the trick.  And a quick search of findchips.com shows DigiKey has them in
stock in both

44 pin TQFP for $6.67:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?Ref=146653&Row=209243&Site=US

and 40 pin DIP for $6.77:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?Ref=146653&Row=209656&Site=US

Ed

On Wed, 8 Sep 2004, Ted Larson wrote:

>
> Ahhh...I hadn't seen Ed's reply before I sent mine.
>
> I am pretty sure his suggestion is better because you can get dual UART
> Atmel chips for much cheaper than dual UART PICs.  Coding a soft UART on the
> PIC that works reliably is much trickier than the couple of bucks you will
> save, just to make up for the fact that there aren't any cheap dual UART PIC
> chips.
>
> Ed's drumbeat of "you can do it all with an AVR" is sinking into my
> brain.....The more I listen to him, the more I think I will probably be
> defecting from PIC's to AVRs soon.
>
> - Ted
>
>
> -----Original Message-----
> From: Ed Okerson [mailto:eokerson at texasconnect.net]
> Sent: Wednesday, September 08, 2004 11:17 AM
> To: David P. Anderson
> Cc: dprglist at dprg.org
> Subject: Re: [DPRG] serial baudrate converter
>
> David,
>
> That depends on how much data the 19200 end sends.  If it is bursty such
> that it is idle at least 50% of the time, this should be doable with any
> micro that has more than one UART.  I prefer AVR's, mostly because of the
> high quality free C compiler (gcc).  The code for this would be pretty
> simple.
>
> Ed Okerson
>
> On Wed, 8 Sep 2004, David P. Anderson wrote:
>
> > Howdy
> >
> > I have a device that only speaks 19200 baud serial that needs to talk
> > to a device than only speaks 9600 baud, no handshaking either way.
> >
> > Is there some easy way to do this?  Maybe with a PIC or such?  Needs
> > to be physically small.
> >
> > best,
> > dpa
> >
> > _______________________________________________
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> >
>
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