big SCO packet

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Hi to all.

I've a little question for Steven or Marcel.
In some circumstances, hcidump show me that chip receive SCO packet with 96 byte of dlen, when mtu is 64.

< SCO data: handle 41 dlen 48
< SCO data: handle 41 dlen 48
< SCO data: handle 47 dlen 48
< SCO data: handle 47 dlen 48

I see this behaviour with my phone or when I connect my dongle with two devices.
With a headset, received packet dlen is always 48.

How this circumstance occurs?
Why I can't write SCO packet with dlen = 96, but always dlen < mtu?

Thanks in advance for your reply!!

Cheers,
Pizza
- -------------------------------------------
Luca Pizzamiglio
CEFRIEL - Embedded Systems Design Unit
Via Fucini, 2 - 20133 MILANO (ITALY)
Phone: +39 02 23954 343
e-mail: [email protected]
ICQ: 5046978
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Hi Luca,

before you expect an answer from Steven you should prove that you are using a CSR based device ;)

Regards

Marcel

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Ok. This is the proof!

hci0: Type: USB

        BD Address: xx:xx:xx:xx:xx:xx ACL MTU: 192:8 SCO MTU: 64:8
        UP RUNNING PSCAN ISCAN
        RX bytes:117 acl:0 sco:0 events:15 errors:0
        TX bytes:310 acl:0 sco:0 commands:14 errors:0
        Features: 0xff 0xff 0x0f 0x00 0x00 0x00 0x00 0x00
        Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
        Link policy:
        Link mode: SLAVE ACCEPT
        Name: 'Thor (0)'
        Class: 0x3e0100
        Service Classes: Networking, Rendering, Capturing
        Device Class: Computer, Uncategorized
        HCI Ver: 1.1 (0x1) HCI Rev: 0x460 LMP Ver: 1.1 (0x1) LMP Subver:

0x460
Manufacturer: Cambridge Silicon Radio (10)

Cheers,
Pizza

- -------------------------------------------
Luca Pizzamiglio
CEFRIEL - Embedded Systems Design Unit
Via Fucini, 2 - 20133 MILANO (ITALY)
Phone: +39 02 23954 343
e-mail: [email protected]
ICQ: 5046978
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