S/PDIF output with BeagleBone Black?

General Discussion
1

Hi,

I want to output an S/PDIF audio signal with my BBB. The AM3358 describes a lot about McASP and that it is capable to output S/PDIF signals, but I can’t get these information together.

So first thing I do not understand from the AM3358-manual: which of the many McASP pins can be used to emit an S/PDIF signal?

Thanks!

2

If you are using Linux, there is already a driver that will configure the McASP into SPDIF mode. You configure it with device tree settings:

https://www.kernel.org/doc/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt

I think you can assign any of the ASXRx pins to be used for the data lines.

Of course, you’ll still need an external signal level translator.