[Resolved] Attaching PCM5102 to Omega2 (I2S)

  • Hi all,

    I´m also trying to get the MAX98357A running on a Linkit Smart 7688 with LEDE master branch (kernel 4.9). The previous manuals about configuring and patching helped me a lot - thanks for it.

    Now I´m able to play a mp3-file with madplay and can hear the sound, but there is one issue.
    After stopping the sound the loudspeaker gets hot, because of ~5V DC output.

    In the MAX datasheet is written "do not remove LRCLK while BCLK is present -> may cause a high DC output". This seems to be the case. In I2S mode the datasheet tells BLCK = "rising edge".
    Am I wrong or is it needed to invert the BCLK signal for the MAX98357A in the simple-sound-card settings to get a I2S mode running properly?

    I tried to set bitclock-inversion in the simple card setup, but it returned with a ralink-i2s / ASoC issue "Failed to set DAI format -22".

    Unfortunately, currently no oscilloscope available to measure it...

    Thanks in advance for any hints from you...

  • Anyway, someone successed with plaing something with aplay on i2s(Lede 17.01 branch)?

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