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Issue with Audio streaming

learnom learnomg
Prodigy 60 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.

  • 0
    TI__Expert 5515 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?

  • 0 in reply to Israel Cepeda
    Prodigy 60 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);

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