I'd look at Pascal Baerten's BAE chips. They are supported by OWFS, and have rather interesting programmable functionality. http://www.brain4home.eu/index.php
Paul On Fri, Jun 10, 2011 at 11:22 AM, Bob Armstrong <[email protected]> wrote: > I have a fairly extensive 1-wire network that works pretty well (thanks, > Paul!) and now I have a handful of 20 character VFD alphanumeric displays that > I want to add to it. There are some VFD displays that have parallel > interfaces that mimic 44780 type LCD controllers, but these are not those. > The good news is that these displays have ordinary RS232 serial interfaces (RX > only - the displays have no TXD) and understand ordinary ASCII. Most printing > ASCII characters display as you'd expect, and there are few ASCII control > characters and escape sequences for controlling display parameters. > > How to interface these to 1-wire? AFAIK there's no such thing as a "1-wire > to RS232" interface already, so I'm thinking of just taking a little AVR chip, > like an 8 pin ATtiny device, and programming it to do the job. There are > already some AVR 1-wire slave libraries, like the one by Matthias Urlichs > (http://github.com/smurfix/owslave), and with that it'd be a fairly simple > job. > > Is there a better way? Or has somebody already done this? > > If not, then there's the question of what kind of 1-wire device should my > gizmo emulate? Ideally it'd be something that OWFS could talk to without any > modifications. I suppose I could write enough code for the AVR to emulate an > HD44780 and fake out one of the existing LCD drivers in OWFS, but that seems > like a lot of extra work. Plus AFAIK the existing LCD interfaces (like the > Hobby Boards one) use general purpose parallel output ports to bit bang the > 44780 prototcol. That's super slow over 1-wire. I'd much rather be able to > send the display straight ASCII text a whole byte at a time. > > Thanks, > Bob > > > ------------------------------------------------------------------------------ > EditLive Enterprise is the world's most technically advanced content > authoring tool. Experience the power of Track Changes, Inline Image > Editing and ensure content is compliant with Accessibility Checking. > http://p.sf.net/sfu/ephox-dev2dev > _______________________________________________ > Owfs-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/owfs-developers > ------------------------------------------------------------------------------ EditLive Enterprise is the world's most technically advanced content authoring tool. Experience the power of Track Changes, Inline Image Editing and ensure content is compliant with Accessibility Checking. http://p.sf.net/sfu/ephox-dev2dev _______________________________________________ Owfs-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/owfs-developers
