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
