On 12/20/05, Krzysztof <[EMAIL PROTECTED]> wrote: > Alfille, Paul H.,M.D. wrote: > > Thank you for the corrected link. > > > > I looked at the entry for the 2408 p38. Sending the data to the LCD > > should be no problem. The real question is incorporating the LCD > > protocol. I wonder how universal this would be, and whether it might > > be implemented as another layer over OWFS. > > > > That could be done with any HD44780 based LCD (they are VERY popular and > cheap so every one could make a DIY LCD and controll it via OWFS, I bet > Louis LCD is hd44780 based , and incorpotating LCD protocol , 4bit mode > would be the best idea, 5 of ds2408 outputs are being used and we have 3 > left to controll buttons, lcd backlight, whatever, if we do not write to > fast to the LCD, we do not have to check R/W status so we save 1 pin, as in > ds2408 datasheet - R/W goes to GND, dealay of 10ms is ok, that is a dealay > >= max(LCD command execution time) )
I bought one of the AAG boards a few months ago: http://www.aagelectronica.com/aag/index.html?target=p_30.html&lang=en-us $25 isn't too terrible, and you can also buy the LCD to go with it. If you look at their datasheet, they are using a 2408, with 5 pins for the LCD (4 data pins plus the D/C pin) and using the remaining 3 to read pushbuttons. However I haven't gotten much use from it yet because I didn't realize at first that it requires a 4-bit interface and the LCDs I have lying around are the 8-bit kind; you have to pay attention to it when buying cheap surplus ones (BG Micro has some of both right now, I see. Their 4-bit one unfortunately uses an EL backlight rather than LED.) I was hoping I could drive a VFD with it, but none of those have a 4-bit interface AFAIK. Maybe it would be possible to program a little microcontroller to be a one-wire slave and drive the VFD, and that approach could also be more efficient; but I doubt I will get around to that. ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://ads.osdn.com/?ad_idv37&alloc_id865&op=click _______________________________________________ Owfs-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/owfs-developers
