I was thinking that the myriad of "how to talk to your 44780" pages on the
net, while excellent otherwise, don't seem to really explain WHY you have to
do the things you have to do. They don't reference the datasheet or show the
process used to extract the proper process from the datasheet. The result is
that there are a lot of pages that copied one another and errors start to
creep in as understanding creeps out.

Having said all that, I make mistakes as well, so I'm hoping some of you
will take a second to check over the page? Please? Pretty Please? And let me
know if I screwed something up.

http://techref.massmind.org/techref/io/lcd/44780.htm 

Specifically, I'm wondering about the wait times between commands in the
initialization function. What happens if you wait more than 15mS on the
/second/ wait, or more than 4.1mS on the /third/ wait. E.g. you have already
waited 15mS and sent the command; now you are supposed to wait at least
4.1mS, but what if you wait 15mS? Does that re-start the sequence in the
44780 so that you are back at the /first/ step? 

Also, is the explanation of the transfer from 8 to 4 bit mode helpful and
clear?

--
James Newton
1-970-462-7764
mailto:jamesnewton@massmind.org
http://www.massmind.org/member/JMN-EFP-786



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