Re: [ECOS] free GUI for eCOS

["Gábor Török" <tgabor84 at gmail dot com>]

Hi!

I think what you need is an LCD controller with a controller IC that
has the graphic memory (or call it framebuffer). But if you want to
display a realtime* signal on screen (similar to an oscilloscope), you
need an "RGB" or "VSYNC" input also. The ILI9320 chip (that I written
an eCos driver for, read my messages on the list) and similar ones
(LGDP4524, HX8312, S6D0129, etc.) has a second interface that can work
simultaneously with the microcontroller interface. They recomment that
you draw text and menus with the microcontroller interface and you
display moving picture with the  "RGB" or the "VSYNC" interface. The
text and the menus are stored into the internal graphic memory of the
chip, and the moving picture is either stored to the RAM or displayed
directly as the controller chip scans the LCD pixels.

So I recommend that you look for a TFT with one of these controller
chips or you use a microcontroller that has an internal LCD
controller.

*What do you mean when you say realtime? How many frames/sec?

Gábor

On Wed, Nov 19, 2008 at 11:27 AM, abhishek srivastava
<just_abhi22@yahoo.co.in> wrote:
> well,
> i thought i had made u very clear, wht i want.......let me try again
>
> 1st thing, i dont have to draw signal .......its already coming.
> jst i need to display tht in real time on some graph over graphical LCD.
> for wht framebuffer is used??i dont think my application require such level of components.its used for video processing,write!
> on that graph i need to set a threshold value so that when signal goes above that level, alarm raises at once (in true real time manner). i need button to set my threshold level.
>
> i dont know that my processor supports ext RAM or not,i suppose it does.
> its philips LPC2148 ARM7TDMI-S.i will look on web for tht.
> so had u  got my point now,hopefully,yes.....
> now wht shud i do, any expert comments or better,suggestions frm u
> frm where cud i get free GUI for ecos?
>
>
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