Re: [lcd4linux] How can I write a character on LCD using his 8 bits code?

[Michael R. <re...@eu...>]

Hi Javier,

>>> I want to write on LCD the Celsius (=BA) character, (which has the
>>> 8 bits code 1101 1111) as the postfix of my Temp Widget. How can
>>> I do it?

>> Specify the ascii code as octal after a backslash. In your example,
>> 11011111 is decimal 223 or octal 337. Try a Postfix of '\337'

> If I use postfix \337, when running ldc4linux I get the error:=20
> "Evaluator: parse error in <\337>: garbage <\337>"
Correct. As it's a string, you have to enclose it in within single quotes.

> If I use postfix '\337', the LCD shows Y337, (really is not a "Y",
> but a very similar strange character) No matter what number I use, I
> allways get Yxxx. I've try writing only the slash, and I get the same
> strange character.

You are very right. The corresponding code vanished during=20
transformation to NextGeneration :-(

Thanks for the hint!

Question to the development team: where shoud this code be added again?=20
In 0.9.11 this has been in the parser, along with the Token handling.=20
There is no such thing anymore.

We could add it to the config code, so the program would never see the=20
"real" backslash sequence, but always the correct ascii value.

Or we could add this to the widget code, so internally the program would=20
work with the backslash sequences, and convert them to one single ascii=20
value when displaying it.

The second has one big disadvantage: length calculations will fail.


bye, Michael

--=20
Michael Reinelt                                   Tel: +43 676 3079941
Geisslergasse 4                                   Fax: +43 316  692343
A-8045 Graz, Austria                          e-mail: re...@eu...