Character Maps

[brunovr]

Hi, 
is possible to know the Character map ?

I want to write °C  !     How ca i do to write the °   ?    



Thank's

[jamesbowman]

There's no "degree" symbol in the built-in character maps. They only have the plain ASCII set. But there are many ways of getting the symbol. Here is a simple hack -use a lower-case "o" in a smaller font:

static void degrees_c(int x, int y, int d)
{
 GD.cmd_number(x, y, 31, OPT_RIGHTX, d);
 GD.cmd_text(x + 4, y, 28, 0, "o");
 GD.cmd_text(x + 6, y, 31, 0, " C");
}


So degrees(100, 100, 27) gives

[brunovr]

WOW ! yes, it's a good idea !!!! :-)

Only another question :      
If i want to see 25,4   decimal degree can i convert to text or there is another simple way ?
and if is negative -0,4 i can use the OPT_SIGNED for negative and for decimal degree?
ciao ciao

[mathiasw]

Salut,

I always use sprintf to write my data into a string which I then output. It gives me the best formatting options

Ciao, Mathias

[jamesbowman]

Right, cmd_number() is integers only (optionally signed with OPT_SIGNED).

For anything fancier sprintf() and cmd_text() are required.

[wetherman]

The standard Arduino sprintf does not know the %f format spec for floats with decimal places. I use dtostrf instead, and that saves the program space taken up by the printf family of string manipulation functions. Then as James said you have to use cmd_text() to put it on the screen.