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WL18xx HFP example HCI cmd sequence for PCM path setup

Gunter Schmer
Genius 14232 points
Other Parts Discussed in Thread: WL1837

Hi,

could you send us an example sequence of VS HCI commands for setting up the PCM path for the HFP? This if for porting to a MSFT BT stack HFP.

Essentially using these commands:

            HCI_VS_BT_IP_Set_Audio_Path (0xFD95)

            HCI_VS_Write_CODEC_Config (0xFD06)

            HCI_VS_Write_CODEC_Config_Enhanced (0xFD07)

            HCI_VS_BT_IP_Audio_Rate_Conversion (0xFDFD)

            HCI_VS_AVPR_Enable (0xFD92)

 

Thanks,

--Gunter

  • 0
    TI__Guru* 85400 points
    Hi Gunter,

    HCI_VS_Write_CODEC_Config is the only command you need. The parameters are explained in: www.ti.com/.../swru442

    Regards,
    Gigi Joseph.
  • 0 in reply to Joseph Gigi
    Prodigy 40 points

    Joseph,

    Gunter submitted this forum post on my behalf.  

    I would like to configure the PCM interface of the WL1837 BT module to act as a slave.  Using the HCI_VS_Write_CODEC_Config command I believe I have correctly configured the PCM interface as slave, but I have clearly see that it is still acting as the master.  The following is the raw command data I am sending to the module:

    0x01,                                     // HCI packet type = Command
    0x06, 0xFD,                         // HCI opcode = HCI_VS_Write_CODEC_Config
    0x23,                                    // HCI param length
    0x40, 0x08,                          // PCM clock rate = 2.112M (48kHz * 44clks)
    0x01,                                    // PCM clock direction = slave
    0x80, 0xBB, 0x00, 0x00,  // PCM frame sync = 48kHz
    0x01, 0x00,                         // PCM frame sync duty cycle = 1 clk
    0x00,                                   // PCM frame edge = rising edge
    0x00,                                  // PCM frame polarity = active high
    0x01,                                  // PCM direction = slave
    0x10, 0x00,                      // PCM channel 1 out size = 16
    0x01, 0x00,                       // PCM channel 1 out offset = 1
    0x00,                                // PCM channel 1 out edge = rising
    0x10, 0x00,                     // PCM channel 1 in size = 16
    0x01, 0x00,                    // PCM channel 1 in offset = 1
    0x00,                               // PCM channel 1 out edge = rising
    0x00,                               // Reserved
    0x10, 0x00,                   // PCM channel 2 out size = 16
    0x11, 0x00,                   // PCM channel 2 out offset = 17
    0x00,                             // PCM channel 2 out edge = rising
    0x10, 0x00,                  // PCM channel 2 in size = 16
    0x11, 0x00,                  // PCM channel 2 in offset = 17
    0x00,                             // PCM channel 2 out edge = rising
    0x00,                             // Reserved

    Is the HCI command above correct?  Is there another command I need to send to put the module into slave mode?  Do you have a snipit of code that configures this that I could use as an example?

  • 0 in reply to Eric Freel
    TI__Guru* 85400 points
    Hi,

    And what does the device return? Does it succeed?
    Can you share a logger log so I can see if the command is received with and responded to correctly?

    Regards,
    Gigi Joseph.
  • 0 in reply to Joseph Gigi
    Prodigy 40 points

    Hello,

    After running some additional tests I found that I had modified the wrong portion of the BTS file.  Now that I have the file setup correctly.  The PCM interface seems to be acting at a slave.

    Thanks for your help.