Hi Joep & all
The HD44780_common.jal I have, does not content a char user defined routine
for CGRAM.
Here is one version (which works):
procedure lcd_custom(
byte in address,
byte in b0,
byte in b1,
byte in b2,
byte in b3,
byte in b4,
byte in b5,
byte in b6,
byte in b7
) is
_lcd_write_command ( LCD_SET_CGRAM_ADDRESS + (address<< 3))
_lcd_write_data( b0 )
_lcd_write_data( b1 )
_lcd_write_data( b2 )
_lcd_write_data( b3 )
_lcd_write_data( b4 )
_lcd_write_data( b5 )
_lcd_write_data( b6 )
_lcd_write_data( b7 )
end procedure
and another version (which does not work unless the chardata is completely
defined before the procedure, which
makes the procedure call not very usefull).
var byte chardata[8] -- define area for custom designed character
procedure lcd_custom_b (byte in address) is -- address 0 to 7
_lcd_write_command ( LCD_SET_CGRAM_ADDRESS + (address<< 3))
lcd = chardata[0]
lcd = chardata[1]
lcd = chardata[2]
lcd = chardata[3]
lcd = chardata[4]
lcd = chardata[5]
lcd = chardata[6]
lcd = chardata[7]
-- set LCD back to normal operation
_lcd_restore_cursor
end procedure
If trying to call procedure like this, got error:
chardata = {0xff, 0xf1, 0xf5, 0xf1, 0xf7, 0xf7, 0xff, 0 } ; error constant
expression expected
lcd_custom_b ( 0 )
So, how can be written the whole chardata, except :
chardata[1] = 0xff
chardata[2] = 0xf1
etc.
which has nonsense
thx,
Vasile
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