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From: "Albrecht Dreß" <albrecht.dress@arcor.de>
To: Linux PPC Development <linuxppc-dev@ozlabs.org>
Subject: MPC5200/BestComm functions question
Date: Sat, 12 Sep 2009 14:36:21 +0200	[thread overview]
Message-ID: <1252758988.3310.0@antares> (raw)

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Hi all,

I have a MPC5200B based system with a 16-bit peripheral attached to the  
Local Bus, and I am looking into possibilities to use BestComm for the  
data transfer.

I found Grant Likely's cool 'mpc5200-localplus-test.c' driver which  
demonstrates this using the 'gen_bd' driver, and which is apparently a  
great starting point.

However, I also have to (a) 32-bit endianess-swap the data and (b)  
calculate a 32-bit crc on it.  Of course, this is possible with the  
buffers using the cpu, but I saw some remarks that the Bestcomm engine  
also includes functions which can perform swapping and crc  
calculation.  I believe it would unload the cpu if the BestComm engine  
could perform these tasks, but I cannot find a good  
documentation/example for that.  Does anyone know any pointers for  
that?  Or maybe even a tool to create the bestcomm tasks from a  
'readable' source?

Thanks in advance,
Albrecht.

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             reply	other threads:[~2009-09-12 12:43 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-09-12 12:36 Albrecht Dreß [this message]
2009-09-12 14:01 ` MPC5200/BestComm functions question Grant Likely
2009-09-13 16:13   ` Albrecht Dreß

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