At 11:18 PM 10/7/98, Sean Breheny wrote:
>Thanks Heinz,
>
>As you probably have seen by now in my other post, the problem is now fixed
>and it had to do with the fact that I was not attaching a pot to Vo (the
>contrast pin).

Great that the fix was so simple.


>I do have one question for you, though. I have so far only displayed
>"Hello" on it on one line. Tomorrow, I should get a bit more time to play
>with it. Is there anything special needed to access the second line, or can
>I just continue to write chars and it will wrap around to the next line?
>Also, what is the address for the next line (does it just start with 16?)


        You got me, I over sold the book 8^o, but it did help make using
the 16x2 self evident.
        I had only gotten as far as you ( getting the display to send
simple messages, surprisingly always less than 9 characters ) and because I
tried a 16x1, and a 16x2 display, I thought both were covered. I checked
the book again and found that it only covered 16x1 displays.

        What it indicated was the first eight character addresses start at
0x80, the next 8 at 0xC0 (for a 16x1 display).

        When I sent more than 8 characters to the 16x2 display, using the
16x1 software the 9th and subsequent characters went to the next line.

        So the first group of 16 characters are addressed from 0x80 through
0x8F, and the next set of 16 characters start at 0xC0.

Embarrassed, Heinz