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Re: AT91RM9200 chip select
- From: Gary Thomas <gary at mlbassoc dot com>
- To: pippo at pippo dot it
- Cc: ecos-discuss at ecos dot sourceware dot org
- Date: Mon, 14 Aug 2006 05:57:54 -0600
- Subject: Re: [ECOS] AT91RM9200 chip select
- References: <16768178.1155556415822.JavaMail.root@ps12>
pippo@pippo.it wrote:
Hi,
I'm using eCosPro with a AT91RM9200-EK board and I'm trying to set up
Then you should be asking them for support, I'm afraid...
a connection with a radio module mapped at CS4 (Host Interface) and CS5
(DCI). For the moment my attempt is to see both CS4 and CS5 activated
on my scope. On my code I firstly configure the external bus:
HAL_WRITE_UINT32(_EBI_CFGR, (AT91C_EBI_DBPUC & 0x00) |
(AT91C_EBI_EBSEN & 0x00));
but when I try to assign the CSs my application stops
HAL_WRITE_UINT32(_EBI_CSA, _EBI_CSA & ~(_EBI_CSA_CS4A));
I thought that maybe is an MMU problem, but I don't know what I should
modify to get the application running, could someone help me? I've
already been spending some time looking for a similar problem and I
noticed that on the file hal_platform_setup.h some initialisations are
done. In particular I saw that the CS0 is assigned to flash before the
MMU is enabled, should I do the same thing with CS4 and CS5?
Thanks.
--
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Gary Thomas | Consulting for the
MLB Associates | Embedded world
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