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Subject: Re: [Bluez-users] DBT-120 firmware upgrade
From: Marcel Holtmann <marcel@holtmann.org>
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Date: Sat, 27 Nov 2004 19:22:11 +0100

Hi Pavel,

> when I compare original backuped firmware with downloaded, that
> there are few differences:
> --------------
> Filename        backup.dfu
> bcdDevice       443
> Firmware type   CSR-dfu2
> --------------
> Filename        GenericCSR.dfu
> bcdDevice       ffff
> Firmware type   CSR-dfu1
> --------------
> 
> Can somebody explain me, what does it means and if it is not problem
> for flashing?

the filename difference should be clear, I think. The bcdDevice is the
build id. Uploaded files are filled with the current build id of the
running firmware. The generic firmware files don't contains a build id,
because they are not build to replace a specific one. CSR has two types
of firmware files and you can use type 1 and 2 to download a new one,
but if you upload a firmware you will get the latest type and this is 2.

> Downloaded firmware is much longer than backuped. Is it OK?

The GenericCSR.dfu contains two firmware files. One HCI 18.x for chips
with 8 Mbit flash and a HCI 16.x for chips with 4 Mbit flash.

Regards

Marcel




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