• State TI Thinks Resolved
  • Locked Locked
  • Replies 4 replies
  • Answers 1 answer
  • Subscribers 51 subscribers
  • Views 1553 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

CC2564 SCO output format via HCI

user4392878
Intellectual 260 points

Other Parts Discussed in Thread: CC2564

Hi:

I route SCO data to host  with command HCI_VS_Write_SCO_Configuration (0xFE10) ,and write voice setting to 0x0040,then I playing a 1Khz wave file from PC,

which is connected with CC2564 running HFP profile , i caculated the data rate is about 8Kbytes/s, and i wrote these raw data to a .pcm file, when playing this file  use cool edit, both 8Khz 8bit  and 8K 16bit sounds wired.

the questions is:

1.Wha's the hfp SCO output format when using  HCI instead of on-chip PCM ?

2What's the difference when using eSCO(wbs) .

  • 0
    TI__Mastermind 23565 points
    Hi,

    For NBS, the output format is the same as PCM (raw audio data). For WBS, it is encoded SBC audio data.

    Regards,
    Miguel
  • 0 in reply to Miguel
    Intellectual 260 points
    Hi Miguel:
    Before command HCI_VS_Write_SCO_Configuration (0xFE10) was send, the SCO is routed to PCM on-chip by default, the format is 8K 16bit, but when using HCI, i only got 8KBytes per sec, should it be 16K?
    Thanks!
  • 0 in reply to user4392878
    TI__Mastermind 23565 points
    Hi,

    Was it for a NBS connection or WBS connection? Do you have some traces of the HCI commands?

    Regards,
    Miguel
  • 0 in reply to Miguel
    Intellectual 260 points
    Hi:
    there is some useful trace:
    -------------------init-------------------------------------
    ......
    hci_vs_write_sco_configuration：1,0,0,0xff
    hci_write_voice_setting:0x40
    --------------------slc setup---------------------------------
    .....
    AT+BRSF=109
    ....
    ..........................Phone outgoing call-------------------
    <<04: 04 0A 24 F9 CB 21 30 0C 0C 02 7A 02 // eSCO connection setup
    >> 01: 29 04 15 24 F9 CB 21 30 0C 40 1F 00 00 40 1F 00 00 0C 00 40 00 02 88 03//accept
    << 04: 2C 11 00 01 01 24 F9 CB 21 30 0C 02 0C 04 3C 00 3C 00 02//eSCO connection success,packet len :60
    ------------------sco data via hci-----------------------
    << 03: 01 01 3C 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 // SCO data
    ....
    ....