Re: [avr-chat] TFT LCD control using AVR

[paul]

Whoah! If anyone has information about that mega8515 controller for an
LCD, I would totally like to know more about it.

I found the entrance curve into doing LCDs with touchscreens using
microcontrollers to be somewhat steep.

Cheers,

-paul


On Sat, August 16, 2008 8:58 am, Royce Pereira wrote:
> Hi, all,
>
>
> Has someone interfaced an AVR to a LCD control chip like Epson S1D13A05 /
>  SSD1906 or the like.
>
>
> I'm starting my new project  with a LCD touch screen. This is the 1st
> time i'm using either.
>
> The display is a 320x240 TFT LCD, with resistive touch screen., with
> 6bits
> each for RBG  = 18 bits. Many makes are available - that's the least of the
> challenge.
>
> The challenge is to interface the thing to my AT Mega32 board.
>
>
> I've done some homework before posting - via google, & have found the
> following options.
>
> 1. Buy a LCD control board - typically has the Epson(like) controller as
> well as a fast, dedicated, 16 bit MCU to interpret high level commands
> from my AVR board via SPI / RS232, and dump the bitmap to the controller
> RAM.
> Also, it will read the touch panel, & send the XY data to my board.
> Reachtech & earthLCD are two such suppliers (*anyone know of others?*) .
> However, these cost @ USD 200. This could be a shoirt term solution.
>
>
> 2. Design/Build one myself. This would take time, but would pay off in
> the long term.
>
> The latter involves using the usual Epson controller & another MCU (I'd
> love to use an AVR), and writing the command interpreter myself.
>
> Now - has anyone attempted / completed this, and is willing to share
> their experience ?
>
> I understand a solution exists using AT32AP7000, but I'd like to keep
> things minimalistic for the moment.
>
> Actually I recall a design contest by Atmel, whose winners had designed a
>  TFT LCD controller using a Mega8515 (in place of the Epson chip) & an
> Mega128 for the high level interface.
> Is there any documentation available on this technique?
>
>
> .Thanks & Best Regards,
>
>
> --Royce
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