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TI Home » TI E2E Community » Support Forums » Digital Signal Processors (DSP) » OMAP™ Processors » OMAP35x Processors Forum » Issue with Audio streaming
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  • Issue with Audio streaming

    Issue with Audio streaming

    This question is not answered
    learnom learnomg
    Posted by learnom learnomg
    on May 15 2012 12:45 PM
    Prodigy60 points

    Hi All,

    I have setup the alsa based support for Audio codec. We are using MCBSP1 for audio streaming.

    When i run aplay with audio file, i get error this error

    playback write error (DMA or IRQ trouble?). Does anyone know what this error is? How to resolve this error.

    Thanks.

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    • Israel Cepeda
      Posted by Israel Cepeda
      on May 15 2012 13:09 PM
      Expert5515 points

      Can you provide more information?

      What platform and OS are you using?, version?

      How are you setting the path?

      What do you have connected to McBSP1?

      Regards!

      ICe

      Please click the Verify Answer button on this post if it answers your question
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    • learnom learnomg
      Posted by learnom learnomg
      on May 15 2012 15:15 PM
      Prodigy60 points

      Here's the setup.

      OS Ubuntu 10.0.

      MCBSP1(OMAP3703) is connected to Audio codec. MCBSP1 clk is externally provided.

      So , I have configured MCBSP1 in slave mode.

      In the machine driver..soc/omap/omap37xx.c

      ------------

      #define FORMAT (SND_SOC_DAIFMT_I2S| SND_SOC_DAIFMT_IB_NF|SND_SOC_DAIFMT_CBM_CFM)

      #define CLK_FREQ 12288000

      snd_soc_dai_set_fmt(codec_dai, FORMAT);

      snd_soc_dai_set_fmt(cpu_dai, FORMAT);

      snd_soc_dai_set_sysclk(codec_dai, 0, CLK_FREQ, SND_SOC_CLOCK_IN);

      snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_EXT, CLK_FREQ, SND_SOC_CLOCK_IN);

      snd_soc_dai_set_clkdiv(cpu_dai, OMAP_MCBSP_CLKGDV, 8);

      ----------------------------------------------------------------------------

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