Hi Peter.

That unit is based on the HD44780 controller, which has no simple 
'invert' option.

If the 'invert line' is required, you can implement it by programming 
the characters you need in an inverted format in to the CGRAM, and then 
display these inverted characters. You are limited to 8 unique 
characters though, and your PIC will need to be able to program all the 
characters you need in to the CGRAM.

Rolf

Peter Feucht wrote:
> Hi, all,
>
> sitting here on Sunday writing some code snippets to test my LCD...
>
> It's a 4 line LCD matrix text display, 40 characters each line, type 
> EAW404B-NLW from Electronic Assembly.
> Everything works so far, I can write characters.
>
> My application needs to show a list of items shown in 4 lines, the user can 
> then choose one of them by moving a cursor.
> BUT: I need to indicate the selected item by *inverting* the line.
> I read the data sheet over and over but cannot find any hint how to invert 
> the displayed information. And no chance to call the manufacturer for it's 
> Sunday...
>
> Has anybody done this before?
>
> Any help greatly appreciated!
>
> Thanks and have a nice weekend.
>
> Peter 
>
>   

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