Re: [lcd4linux] bugreport on HD44780 driver for 0.10.0

[Johan S. <Joh...@xs...>]

Hello Michael,
> Hi Johan
> 
> 
>>-       drv_generic_text_greet("goodbye!", NULL);
>>+       drv_generic_text_greet("goodbye", NULL);
> 
> 
>>Indeed, I only removed the exclamation mark in the final splash screen.
>>Everything works as it should. ["goodbye! dude" also worked, it seems the
>>exclamation mark is the cullprit]
> 
> 
> Well, I tend to not to believe you :-)

I can fully understand. However it still is true
> 
> 
>>I know my patch only solved a symptom. The real problem (why can't I
>>show an exclamation mark) is still there. I hope one of the developpers
>>is able to find this real problem.
> 
> 
> I have absolutely no idea. Maybe your display interprets the ! as some
> sort of control sequence...
> 
> could you try if you can use a exclamation mark somewhere in the layout
> (just use a stativc text or so) without problems?

An exclamation mark in the layout is no problem.

The compiler optimized "goodbye!" to one string for all drv_DISPLAY.c files.
Recompiling with "Goodbye!" gave a two-line garbled display.
Reconfiguring with "--with-drivers=HD44780" and "goodbye!" gave a two-line garbled display.
Recompiling with "goodbye" gave a working display.

Seems I need a parallel port snoop program to understand what is happening.
> 
> bye, Michael
> 

Thanks for responding, Johan