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Re: PowerPC FEC problems
- From: Gary Thomas <gary at mlbassoc dot com>
- To: ken king <kknhuntsville at yahoo dot com>
- Cc: eCos Discussion <ecos-discuss at ecos dot sourceware dot org>
- Date: Fri, 06 May 2005 17:20:58 -0600
- Subject: Re: [ECOS] PowerPC FEC problems
- References: <20050506231553.27475.qmail@web60221.mail.yahoo.com>
On Fri, 2005-05-06 at 16:15 -0700, ken king wrote:
> IT WORKED!!!! (once anyway)
>
> Much thanks to Mr. Andrew Lunn for telling me to
> read the data book. And to Mr.Gary Thomas for
> confidence, you told me the driver worked.
>
> There are two statements in the FEC description
> that probably should be in bold type:
>
> 1--The DB and buffers must be in external memory.
> Apparently that means, for this version of this
> part, they can not be in EPPC memory.
>
> 2--Something like, to save overhead the FEC DMA
> uses burst. Apparently that means the the DB and
> Buffers MUST be in burstable memory.
What revision of the processor (not just model) do you have?
You can read this off the chip, or by printing the value of
the PVR SPR.
--
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Gary Thomas | Consulting for the
MLB Associates | Embedded world
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