I saw only millisecond delays in the spec sheet and in desperation wrote delays loops several seconds long.nada I suppose I must have damaged something? Thanks Tony M. David Schmidt wrote: > > Be sure you are waiting the required amount of time between instruction > writes to the display. > > I had trouble at first writing to displays in 4 bit mode and got > results like you see. After I checked my code I found I wasn't quite > waiting long enough between writes. Doubling the delays (for overkill) > worked! I also found that the delays mentioned in spec sheets are only > approximate. Increase yours and see if it helps. > > Dave > > At 02:08 PM 12/17/96 -0500, you wrote: > >Hello > > I am having trouble initializing my 2x8 optrex lcd w/hd44780a > >controller > >in 4 bit mode.I have tried everything I could glean from the FAQ's but > --------------------------------------------------------------------------- > ( DSchmidt Technologies, Ventura CA http://www.rain.org/~dschmidt ) > ( Freq selectors for FME/FMX/FM25, DTMF decoders. Email dschmidt@rain.org ) > ---------------------------------------------------------------------------