Subject: Re: [Bluez-users] I have a question about the bdaddr utility
From: Marcel Holtmann <marcel@holtmann.org>
To: bluez-users@lists.sourceforge.net
In-Reply-To: <20050907101308.027e8482.pws@csr.com>
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	 <1126026222.4645.53.camel@blade> <20050906201502.GA4955@uni-duesseldorf.de>
	 <1126040038.19765.3.camel@blade>  <20050907101308.027e8482.pws@csr.com>
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Date: Thu, 08 Sep 2005 02:28:37 +0200

Hi Peter,

> > > > > My question is, is this change permanently written to the chip, or is it 
> > > > > merely a volatile change as far as the running kernel is concerned?
> > > > the change is permanent.
> > > 
> > > Would it be possible to make it volatile?
> > 
> > in case of CSR chips the BD_ADDR is a PSKEY. I don't know if it can be
> > made volatile. This is a question for the CSR gurus ;)
> 
> It's possible to have volatile PSKEYs.  You need to use the CSR BCCMD
> command set to make this work, but that's the same set you'd be using to
> write the PSKEY to flash.  The command is BCCMDVARID_PS.  You write the
> PSKEY to temporary (actually, it says here "transient") store (code 8)
> instead of the default (code 0) or implementation (usually meaning flash,
> code 1).  Then you have to perform a warm reset by setting
> BCCMDVARID_WARM_RESET --- this resets pretty much everything except the
> persistent store, including resetting the host transport.  There's no way
> around the warm reset; the new address won't take effect otherwise.  Note
> the temporary store overrides any address in flash.

this is great. I added a "-t" switch to the bdaddr utility to make the
change of the address volatile and a "-r" switch to perform the needed
cold or warm reset.

> If you don't already have access to the BCCMD command set this is likely to
> be Greek, unfortunately.  (Unless you speak Greek.)

Some people of us speak Greek ;)

Regards

Marcel


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