I'm working on RPI model B board.I've a driver for wolfson audio card,Which uses i2s pins for data transfer.Now i need to work on RPI B+ model.But there are no i2s pins in model B+.What i need to do to make my driver work on both model B and model B+ and how the data transfer from audio card to the new RPI B+ model board?

  • Have you asked Wolfson? I'm not sure that the card is usable on the B+ as I thought it used the now missing P5 header. Wolfson will give you a definitive answer. The gpios still exist, they just aren't brought out to P5.
    – joan
    Commented Oct 6, 2014 at 7:05
  • There is now a new card which has come out since Wolfson was acquired by Cirrus Logic.
    – SlySven
    Commented Jan 7, 2016 at 4:56

1 Answer 1


There are 2 appearances of the PCM pins on BMC_GPIO 28-31 ALT2 (on the B P5 header) and BMC_GPIO 18-21 ALT0 which are on the B+ P1 header. There would need to be some configuration changes and the pins are not grouped together like on P5.

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