Re: [Bluez-users] I have a question about the bdaddr utility

[Peter Stephenson <pws@csr.com>]

Marcel Holtmann <marcel@holtmann.org> wrote:
> Hi Andy,
> 
> > > > 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.

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

pws


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