Re: [oc] Some Terminologies in BUS system?

[nico <nicolas.boulay@ifrance.com>]

On Thu, 23 Jan 2003 18:24:02 +0800
NansonHuang@itri.org.tw wrote:

> 
>  Hi, dear elites,
> 
> 1. Recently, I study the DMA and AMBA bus. I saw the so-called bus
> parking functionality. Could someone tell me what's bus parking ? How
> does it work?

don't know.

> 
> 2. Besides, what's the difference between wrapper and bridge ?
> Generally, they are translator between different protocol.
> 

I supposed this is the same.

> 3.In DMA or Arbiter, we always implement the rotated priority. If we
> have completed to service the current channel, is it necessary to
> re-linquish the bus to processor and then re-arbitate the bus to
> service the next channel ?
> 

You could choose what ever scheduler you want. It depend what kind of
performance you want. You could use some "time slot" scheduler to
garanty some latency.

> 4. UML is a popular modeling language in S/W domain. Does anyone try
> to use UML to do the logic/SoC/IP design ?
> 

I have read about UML-RT (real time) version of UML The last discussion
was about execution model. UML-RT add timing informations in the diagram
where you describe the message between entities (sequence diagram).

nicO

>  All the best,
> 
>  Nanson
> 
> 
> 
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