Re: [Bluez-users] HCI version
From: Steven Singer <hidden>
Date: 2007-01-23 19:28:54
Lauri Lubi wrote:
HCI Ver: 1.2 (0x2) HCI Rev: 0x7a6 LMP Ver: 1.2 (0x2) LMP Subver: 0x7a6 Is HCI Ver the same as supported Bluetooth version?
Yes it is. Or, at least, it's supposed to be. Sadly, this dongle reports the wrong spec version. The firmware (0x07a6) is BT 2.0 + EDR compliant, it just the dongle reports itself as just BT 1.2 compliant. I'm sure this firmware reported itself as 2.0 + EDR when we shipped it. We did add the ability for the firmware to spoof its spec version to work round a problem in some host stacks where they were rejecting devices complaint to a later version of the spec than that to which the stack had been written. Since a 2.0 + EDR device will work quite happily with a 1.2 stack (there are no new HCI events) this was an easy workaround. It's possible that the dongle manufacturer is shipping this device with spoofing enabled because it was being bundled with such a host stack. The problem should be easily remedied by resetting the PS key HCI_LMP_LOCAL_VERSION back to its default value of 0x0303, though, in practice, it shouldn't make any difference. All this key does is change what version the dongle reports to the stack not how the firmware behaves. No devices or host stacks are meant to use the version number to change their behaviour, they're meant to use the supported features. This device will continue give EDR performance even without this change and BlueZ should treat it as having 2.0 + EDR features. If you're intending to use this dongle with a host stack that might be upset by a 2.0 + EDR device, you should leave this PS key alone. If you want to know whether 2.0 + EDR features are really supported then look at the supported features, not the version. - Steven -- To access the latest news from CSR copy this link into a web browser: http://www.csr.com/email_sig.php To get further information regarding CSR, please visit our Investor Relations page at http://ir.csr.com/csr/about/overview ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Bluez-users mailing list Bluez-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-users