How to draw the Euro sign

giusloq · Jan 11th 2016, 4:57pm

I'm using standard fonts to write some texts on the display, but I think it's impossible to draw Euro sign, because the emWin fonts lack that character. Right?

Is it possible to embed the Euro sign in a standard font? Do I need to create a custom font?

SEGGER - Jörg · Jan 19th 2016, 2:55pm

Hi,

The code of the euro-sign is 0x20AC. Unfortunately that code is not part of the ASCII- or ISO8859-1 range. Here is a sample with a custom font showing the euro character:

C Source Code

#include "GUI.h"
GUI_CONST_STORAGE unsigned char acGUI_Font16_20AC[ 10] = { /* code 20AC, EURO SIGN */
___XXXX_,
__X_____,
_X______,
XXXXXXX_,
_X______,
XXXXXXX_,
_X______,
_X______,
__X_____,
___XXXX_};
GUI_CONST_STORAGE GUI_CHARINFO_EXT GUI_Font16_CharInfo[1] = {
{ 7, 10, 0, 3, 7, acGUI_Font16_20AC } /* code 20AC, EURO SIGN */
};
GUI_CONST_STORAGE GUI_FONT_PROP_EXT GUI_Font16_Prop1 = {
0x20AC /* first character */
,0x20AC /* last character */
,&GUI_Font16_CharInfo[ 0] /* address of first character */
,(GUI_CONST_STORAGE GUI_FONT_PROP_EXT *)0 /* pointer to next GUI_FONT_PROP_EXT */
};
GUI_CONST_STORAGE GUI_FONT GUI_Font16 = {
GUI_FONTTYPE_PROP_EXT /* type of font */
,16 /* height of font */
,16 /* space of font y */
,1 /* magnification x */
,1 /* magnification y */
,{&GUI_Font16_Prop1}
,13 /* Baseline */
,7 /* Height of lowercase characters */
,10 /* Height of capital characters */
};
void MainTask(void) {
GUI_Init();
GUI_UC_SetEncodeUTF8();
GUI_SetFont(&GUI_Font16);
GUI_DispString("\xe2\x82\xac");
while (1) {
GUI_Delay(100);
}
}

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Regards, Jörg

giusloq · Jan 20th 2016, 3:34pm

"Here is a sample with a custom font showing the euro character:"

Of course, I can't use that single-character font for drawing a full string, including euro sign.

C Source Code

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