AVR-Chat

On Fri, Feb 16, 2007 at 04:10:02PM -0000, Tim Mitchell wrote:
> David Kelly wrote:
> > 
> > Most don't do it but I have always advocated polling the busy bit on
> > the LCD controller rather than use timing loops. 
> 
> According to my LCD code (which does work, but I wrote it a while ago)
> you can't use the busy bit while initialising the controller - you
> have to just wait. And wait....

Was looking this morning at the code I wrote in 1990 and haven't revised
since. In a loop I wrote 0x38 to my 8 bit port, toggled E, waited 15ms,
repeated 2 more times. Concern was if I caught the controller in 4 bit
hi or 4 bit low states that my desire to run in 8 bit mode would get
thru.

Later commands polled the controller for busy.

-- 
David Kelly N4HHE, dkelly@HiWAAY.net
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Whom computers would destroy, they must first drive mad.