B4R Question LiquidCrystal write special chars

rwblinn

Well-Known Member
Licensed User
Hi,

how to write special characters, like arrow_up and arrow_down to the LCD display?

The rLiquidLibrary does not support the definition of special characters yet.

Thinking of something, like
'Define the special char layout
B4X:
Private LCDArrowUp(8) As Byte = Array As Byte(0x04, 0x0E, 0x15, 0x04, 0x04, 0x04, 0x04, 0x00)
Private LCDArrowDown(8) As Byte = Array As Byte(0x00, 0x04, 0x04, 0x04, 0x04, 0x15, 0x0E, 0x04)

'Define the special char
B4X:
lcd.DefineSpecialChar(0, LCDArrowUp)
lcd.DefineSpecialChar(1, LCDArrowDown)

'Write the special char
B4X:
lcd.Write(LCDArrowUp)
 

Erel

Administrator
Staff member
Licensed User
You can use this inline code:

B4X:
RunNative("createChars", Null)
RunNative("writeChar", 0)

#if C
Byte smiley[8] = {
  B00000,
  B10001,
  B00000,
  B00000,
  B10001,
  B01110,
  B00000,
};
void createChars(B4R::Object* o) {
   b4r_main::_lcd->lc->createChar(0, smiley);
}
void writeChar(B4R::Object* o) {
   b4r_main::_lcd->lc->write((Byte)o->toULong());
}
#end if
 
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