Re: [Bluez-users] CSR firmware

[Michal Semler <cijoml@volny.cz>]

On Sunday 30 of May 2004 09:14, Marcel Holtmann wrote:
> Hi Michal,
>
> > > The problem is not the vendor ID. It is the digital signature of the
> > > firmware file. You can download everything you want onto your dongle,
> > > but it can happen that the boot loader don't boot the other firmware.
> > > In that case it will stay in DFU mode. The boot loader can only be
> > > changed over a SPI connection.
> >
> > That means, that if I download from dongle original firmware and then
> > flash other one into dongle and it will not work I can't flash original
> > fw back?
>
> this is not quite right. It can happen that the boot loader will load
> your current firmware, but in case of a DFU download it will not accept
> its own firmware. Now your dongle will stay in DFU mode and it is
> useless. The only way to get the firmware back it through SPI.
>
> > What is SPI connection?
>
> Besides UART and USB it is the third interface of the CSR chips. Mainly
> used for development and sometimes the only way to get a device working
> again.
>
> > Any related docs?
>
> Many of them, but not publicly available.

Did you write some tool for linux to communicate via SPI?
I tried your btdfu-0.2 and I was not allowed to dowload firmware to it :(

and archive with 2 dongles doesn't work too.
notas:/usr/src/btdfu-0.2/src# ./btdfu -d 03ee:641f archive test
Searching for devices ...
        002/002 03ee:641f 114
        004/002 045e:007e 505

More than one device found. You must specify one.
notas:/usr/src/btdfu-0.2/src# ./btdfu -d 114 archive test
Searching for devices ...
        002/002 03ee:641f 114
        004/002 045e:007e 505

More than one device found. You must specify one.
notas:/usr/src/btdfu-0.2/src# ./btdfu -d 002/002 archive test
Searching for devices ...
        002/002 03ee:641f 114
        004/002 045e:007e 505

More than one device found. You must specify one.
notas:/usr/src/btdfu-0.2/src# ./btdfu -d 002 archive test
Searching for devices ...
        002/002 03ee:641f 114
        004/002 045e:007e 505

More than one device found. You must specify one.
notas:/usr/src/btdfu-0.2/src# ./btdfu -d hci0 archive test
Searching for devices ...
        002/002 03ee:641f 114
        004/002 045e:007e 505

More than one device found. You must specify one.

Michal



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