Graphic LCD

Started by kuinton May 19, 2004
Hey all,
Has anyone here used a Graphic LCD in the near past? I'm trying to
Interface a Graphic LCD to my HC12 microcontroller... Any
reccomendations on the LCD and any available source code?
Thanks,
Quinton.



Quinton,

I've once used a Winstar B/W 320x240 SED1335 based display:
WG320240B http://www.winstar.com.tw/

The CPU used was a 9S12DP256 in single chip mode.

I dont recommend you the SED1335, most of these controllers have a bug that
produces flicker while you are accessing it. There are other good LCD
controllers like the T6963.

These are some of the sites I have in my display bookmark:
http://www.optrex.com/
http://www.densitron.com/display/
http://www.hantronix.com/
http://www.purdyelectronics.com/
http://www.seiko-usa-ecd.com/lcd/products/graphic_mods/index.html

I was in a hurry so to driving it I've buyed a Graphic Library from RAMTEX:
http://www.ramtex.dk/glcd/glcd1335.htm
In my project this library was using 12 K of ROM for code, 17 K of ROM for
fonts, and aprox 500 bytes of RAM.
It took me a lot of work to make this library work in a banked model.
(Metrowerks V1.2)

I think that you can find some code in the web, but if you need proportional
fonts, complex graphics, etc, the best is to use a standard graphic library. Regards,
Guillermo. -----Original Message-----
From: kuinton [mailto:]
Sent: Micoles, 19 de Mayo de 2004 07:26 p.m.
To:
Subject: [68HC12] Graphic LCD Hey all,
Has anyone here used a Graphic LCD in the near past? I'm trying to
Interface a Graphic LCD to my HC12 microcontroller... Any
reccomendations on the LCD and any available source code?
Thanks,
Quinton.

--------------------To learn more about
Motorola Microcontrollers, please visit
http://www.motorola.com/mcu
o learn more about Motorola Microcontrollers, please visit
http://www.motorola.com/mcu

Yahoo! Groups Links


We use a 240x128 LCD with T6393 controller (lot of sources with generic
names XX-240128-X). We start testing with code generated by Processor Expert
Bean, but now using our own code.

Jordi

----- Original Message -----
From: "kuinton" <>
To: <>
Sent: Thursday, May 20, 2004 12:26 AM
Subject: [68HC12] Graphic LCD > Hey all,
> Has anyone here used a Graphic LCD in the near past? I'm trying to
> Interface a Graphic LCD to my HC12 microcontroller... Any
> reccomendations on the LCD and any available source code?
> Thanks,
> Quinton.





"Jordi Costa" <> wrote:

> names XX-240128-X). We start testing with code generated by Processor Expert
> Bean, but now using our own code.

May I ask _why_ you didn't continue using the PE bean?

Oliver
--
Oliver Betz, Muenchen


Oliver,

Bean was very useful to start display and software testing, but:

1 - We had to add some other functions (even some of them could be available
in the bean) : Diplay/hide cursor, Graphic XOR mode, Clean specific area
text, clean specific area graphic, ...
2 - Improve Bitmap displaying speed. Using bean, transfer is done at 1 bit
(pixel) cycle while (in some cases) it can be done at 6 bits (pixels) /
cycle.
3 - Bitmaps were stored as variables and thus copied to RAM (wasting scarce
RAM space) while TIMAGE struct stored info not required in our app.
4 - Etc, etc.

Jordi

----- Original Message -----
From: "Oliver Betz" <>
To: <>
Sent: Friday, May 21, 2004 1:59 PM
Subject: Re: [68HC12] Graphic LCD > "Jordi Costa" <> wrote:
>
> > names XX-240128-X). We start testing with code generated by Processor
Expert
> > Bean, but now using our own code.
>
> May I ask _why_ you didn't continue using the PE bean?
>
> Oliver
> --
> Oliver Betz, Muenchen
>