St7920

[Electrosolve]

Hello

I'm trying to use the LM3037 LCD display which has a ST7920 controller. This seems to be much the same as the HD44780.

I can display the normal ascii character set using LCDOUT but I need to display the inbuilt Chinese GB character code set.

Can anyone point me in the right direction?

Thanks

[Melanie]

Displayable ASCII Characters go up to something like Decimal 126. The values between 127-255 will display all kinds of interesting things... You'll have to write a little program something along the lines of...

	CounterA=0
	LCDOut $FE,1
Loop:
	If ButtonUp=0 then CounterA=CounterA+1
	If ButtonDown=0 then CounterA=CounterA-1
	LCDOut $FE,$80,"ASC="#CounterA," CHR=",CounterA,"   "
	Pause 100
	Goto Loop

... just to cycle through and you can then scribble yourself a note as to what's what...

I tend to go through an excercise like this to find out things like Pound (Sterling) or Euro signs, the symbol for Degrees (ie Degrees Celcius) etc... because their table position varies from one manufacturer to the next.

[Electrosolve]

Thanks but I can already display the ascii characters.

This particular controller has a simplified chinese character set that can be accessed between A1A0h and F7FFh.

Data sheet here - http://www.topwaydisplay.com/Pub/IC_...20V31(eng).pdf

Thanks again

[Electrosolve]

Problem solved

lcdout $FE, $80, $B0, $C0

Displays the character B0C0h on the first character position on the display.

I forgot the $80 the first time so you actually helped anyway Melanie.

Thanks again

[CuriousOne]

Anyone went further with this display and PBP?
Like loading own font and so on?

[CuriousOne]

As found out by brute data sending, if you want to display large size English letters, you should use

LCDOUT $FE, $80, 163, 128+ASCII character code.

LCDOut $FE,$80,163,128+72,163,128+101,163,128+108,163,128+108,163,128+111,163,128+33 'Will display Hello! with large letters

Just these letters are as ugly, as most common Latin letters in Chinese fonts Also they're monospaced and use whole 16x16 area.
Here's an example.