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MMU, chip select on AT91
- From: Jérémy Alles <jeremy dot alles at orange-ftgroup dot com>
- To: "'eCos Discussion'" <ecos-discuss at ecos dot sourceware dot org>
- Date: Fri, 7 Mar 2008 11:03:31 +0100
- Subject: [ECOS] MMU, chip select on AT91
Hi,
I?m using a AT91 processor on a AT91RM9200DK board. I?m using a port that
someone in my company did some years ago. Here is my problem: I would like
to use the graphic possibilities of the board. In the development kit, I
have an example driver (source code and bin file).
If I run the bin file from Zooboot it works fine.
If I build the driver (using arm-elf-gcc) and launch it from Redboot (using
eCos environment) it doesn?t work anymore.
I?ve traced down the problem to the chip select line 2 (NCS2). This chip
select should be enable when I access data at 0x30000000 but it?s not. I was
thinking that it might be a problem with the MMU initialization that is done
in eCos in AT91 common code.
Do you have any idea what I?m doing wrong ?
Regards,
Jeremy
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