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'How to move cursor without overwriting LCD display'
1997\01\14@121447 by Brooke

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Hi:

I am trying to move the cursor on an LCD display using a 44780
controler chip.  When the cursor moves it seems to be overwriting
the display with it's location.  How to move the corsor and NOT
change the display?

Thanks,
Brooke

1997\01\14@183922 by Peer Ouwehand

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At 09:08 97/01/14 -0800, you wrote:
>Hi:
>
>I am trying to move the cursor on an LCD display using a 44780
>controler chip.  When the cursor moves it seems to be overwriting
>the display with it's location.  How to move the corsor and NOT
>change the display?
>
>Thanks,
>Brooke

All you have to do is change the address of where the cursor
has to be displayed.

Peer.

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1997\01\14@183929 by Brooke

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Brooke wrote:
>
> Hi:
>
> I am trying to move the cursor on an LCD display using a 44780
>.....

The answer is that the 44780 always either increments or decrements
when the Display Data register ie EITHER read or written.  So I set
the Address Counter one higher than required, setup for decrement,
and READ the DD ram.
> Brooke

1997\01\14@211522 by reddyk

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What code are you using to move the cursor ?
If you are using 32 (space) try sending 20 as an instruction not a
printable character.

Brooke wrote:
>
> Hi:
>
> I am trying to move the cursor on an LCD display using a 44780
> controler chip.  When the cursor moves it seems to be overwriting
> the display with it's location.  How to move the corsor and NOT
> change the display?
>
> Thanks,
> Brooke

1997\01\14@221026 by Brooke
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Peer Ouwehand wrote:
>
> At 09:08 97/01/14 -0800, you wrote:
> >Hi:
> >
> >I am trying to move the cursor on an LCD display using a 44780
> >controler chip.......
>
> All you have to do is change the address of where the cursor
> has to be displayed.

Peer:

Correct.  For some reason it didn't work the first time

Thanks.
Brooke

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