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Bluetooth Bluetopia Stack Problem when stream audio from smartphone to WL1835MOD Cape

tri dinh
Intellectual 300 points

Other Parts Discussed in Thread: WL1835MOD

Hi Expert!

I'm using Beaglebone Black and WL1835MOD Cape(Circiutco)  running prebuilt image for Beaglebone Black. I'm tried WL1835MOD with Bluetooth Bluetopia Stack and received audio streaming from smartphone but it warning problem below:

AUDM> Remote Device Properties Changed. BD_ADDR: D05785202EA1 Device Flags: 0x800004FD Sniff State : TRUE (500 ms) AUDM> Remote Device Properties Changed. BD_ADDR: D05785202EA1 Device Flags: 0x800004DD Sniff State : FALSE AUDM>
AUDM: Audio Stream Disconnected: Sink. AUDM>
AUDM: Audio Stream Connected. Type : Sink Address : D05785202EA1 MTU : 672 Frequency: 48000 Channels : 2 Flags : 0 AUDM>
AUDM: Audio Stream State Changed. Type : Sink State: Playing ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4246:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4246:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4246:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:4725:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM default
AUDM>

The WL1835MOD cape don't have audio codec or sound card and I only want to check the audio signal out on 4 PCM lines out onboard by Oscilloscope but haven't any signal out on PCM interface. The log above I guess it seems cannot detect the sound card or Codec and warning error, but I think this error don't affect or impact to audio out signal on PCM interface, I don't know why there are no audio signal out on PCM. Please advise about this!

Besides that, I'm not so family with Bluetopia Stack, so can I using another bluetooth stack liked BlueZ to control and test A2DP profile on Beaglebone Black and WL1835MOD Cape? Have any BlueZ version for TI SDK and prebuilt image?

Thank you and best regards,

Tri.

  • 0
    TI__Mastermind 32615 points
    Hi,

    The A2DP data is sent as a ACL packet over UART. So you would not see any thing on PCM interface.

    and have a look at the below E2E, where they were able to bring up BlueZ on BBB (mind that this post has three pages)
    http://e2e.ti.com/support/wireless_connectivity/f/307/p/381933/1354602