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Re: EDB7212 LCD support
- To: Fano dot Ramparany at rd dot francetelecom dot fr
- Subject: Re: [ECOS] EDB7212 LCD support
- From: "Lewin A.R.W. Edwards" <larwe at larwe dot com>
- Date: Wed, 29 Nov 2000 09:47:15 -0500
- Cc: ecos-discuss at sourceware dot cygnus dot com
Hi Fano,
>Has anybody extended the LCD support provided in eCos 1.3.1 for Cirrus
>Logic EDB7212 board to display grey level images on the screen?
Where did you find information on how to use the LCD support at all?
Basically the only info I've found is a note in the configuration utility
that says that enabling LCD support allocates 128K of RAM. Thus far I have
no idea where that RAM is, is there a symbol that points to it?
I presume that the way to get grayscale is to enable LCD support (which
allocates the full 128K of RAM for the LCD frame buffer) then manually poke
the LCD controller registers for the desired LCD size and bit depth.
Our system is driving a 320x240 color display, which is effectively a 960 x
240 grayscale display, so I will have to solve the same problem myself.
Lewin A.R.W. Edwards (Embedded Engineer)
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