[Bluez-devel] Re: Problems with anycom usb dongle

[Sebastian Roth <sebastian.roth@esk.fhg.de>]

Hi Marcel,

as I mentioned in my first post I'm new to blueooth. So I think I'm not
the one who can really answer your questions but let's give it a try.

 > Should I mark it as broken in hci_usb driver?
The dongle seems broken but IMO it's better to have an acknowledgment
of someone else who have tested it.

 > Or should I simply drop SCO packets with no data on handle 0 in the
 > HCI core? Is handle 0 a valid handle?
 From my bluetooth spec, page 226 (bluetooth_1_1_vol1)
"The SCO handle zero is never used."



 > There must be "SCO add" in between.
Yes you are right!

(this should be the first button press AT+CKPD=200)
 > ACL data: handle 0x0001 flags 0x02 dlen 17
 > ACL data: handle 0x0001 flags 0x01 dlen 3
     L2CAP(d): cid 0x0041 len 16 [psm 3]
       RFCOMM(d): UIH: cr 0 dlci 2 pf 0 ilen 12 fcs 0x40
       0000: 41 54 2b 43 4b 50 44 3d  32 30 30 0d              AT+CKPD=200.
< ACL data: handle 0x0001 flags 0x02 dlen 14
     L2CAP(d): cid 0x01c3 len 10 [psm 3]
       RFCOMM(d): UIH: cr 1 dlci 2 pf 0 ilen 6 fcs 0x9a
       0000: 0d 0a 4f 4b 0d 0a                                 ..OK..
< HCI Command: Add SCO Connection (0x01|0x0007) plen 4
   0000: 01 00 e0 00                                       ....
 > HCI Event: Command Status (0x0f) plen 4
   0000: 00 01 07 04                                       ....
 > HCI Event: Number of Completed Packets (0x13) plen 5
   0000: 01 01 00 01 00                                    .....
 > HCI Event: Connect Complete (0x03) plen 11
   0000: 00 01 04 33 ff 00 1b 08  00 00 01                 ...3.......
 > SCO data: handle 0x0000 dlen 0
... (a lot of those packets)
 > SCO data: handle 0x0000 dlen 0
 > SCO data: handle 0x0401 dlen 48
     0000: 58 00 60 ff f0 ff a0 ff  7c ff 98 ff d8 00 38 00
     0010: 68 00 48 ff d0 ff 6c ff  5c ff a8 ff f0 00 50 00
     0020: 70 00 38 ff c8 ff 7c ff  88 ff c0 00 20 00 70 00

I was wrong.
The first button press was _before_ the SCO data with handle 0!


Best regards,
Sebastian



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