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2004-05-07 by bzijlstra@home.nl
Have done it, a PCF8574(A) and a LCD in 4-bit mode. For AVR and 8051. Timing is very important. Check my homepage. Bye Ben Zijlstra http://members.home.nl/bzijlstra -------------------------------------------------------------------- mail2web - Check your email from the web at http://mail2web.com/ .
2004-05-07 by Phil
Yeah, I made that mistake too. Its easy enough to do - the obvious connection is for d0-3. that's why it pays to reread the data sheets when it doesn't work. its a quirky beast but when you can drive an lcd display with only 6 pins, its worth the hassle. --- In AVR-Chat@yahoogroups.com, John Johnson <johnatl@m...> wrote: > Okay, I finally got all the egg off my face, and thought I would post > the solution in case anyone else searches the archives. > My 4 data lines were connected to DB0-DB3, instead of DB4-DB7. After > correcting that and working on some timing challenges, it's working > great. Thanks for all the replies! > > Thanks for the ref. to your lib too, I'll check it out. > > Regards, > JJ > > On Friday, May 7, 2004, at 11:46 AM, bzijlstra@h... wrote: > > > Have done it, a PCF8574(A) and a LCD in 4-bit mode. For AVR and 8051. > > Timing is very important. Check my homepage. > > > > Bye > > Ben Zijlstra > > http://members.home.nl/bzijlstra > > > > > > ------------------------------------------------------------------ --
> > mail2web - Check your email from the web at > > http://mail2web.com/ . > > > > > > > > > > > > Yahoo! Groups Links > > > > > > > > > >
2004-05-07 by John Johnson
Okay, I finally got all the egg off my face, and thought I would post the solution in case anyone else searches the archives. My 4 data lines were connected to DB0-DB3, instead of DB4-DB7. After correcting that and working on some timing challenges, it's working great. Thanks for all the replies! Thanks for the ref. to your lib too, I'll check it out. Regards, JJ
On Friday, May 7, 2004, at 11:46 AM, bzijlstra@home.nl wrote: > Have done it, a PCF8574(A) and a LCD in 4-bit mode. For AVR and 8051. > Timing is very important. Check my homepage. > > Bye > Ben Zijlstra > http://members.home.nl/bzijlstra > > > -------------------------------------------------------------------- > mail2web - Check your email from the web at > http://mail2web.com/ . > > > > > > Yahoo! Groups Links > > > > >