Digital Audio

I’m looking to enable digital sound on my Fairy board (iMx6) through the s/pdif and wondered if anybody could give some pointers of where to start.

In my simplistic mind, I would assume a driver would need to be written to interact with the hardware and then be embedded into the rom. Maybe just created as a module if enabling of the hardware can be done post boot.

Is there a good point of reference for hardware enabling within the OS?

Hi Mike

if you look on my website :-

https://www.mbelect.co.uk/RISCOS/

You will find PI_I2S Module this comes with source code to create a module for the raspberry PI that enables
a sound driver for I2s output to drive various DAC boards.

You will need quite low level information to enable the I2S output on your own system and then normally there will be
a buffer that you have to fill so you will need its location and register list.

In the zip file you will find various DAC Basic programs these configure the boards via I2C you probably will not need these.

You will also find a folder called PI_I2S_Source you could use this as a basis for what you need, I am not sure what will happen
if you load the module as it sets various registers that may lock up your system. (as it is different to the PI registers)

May be of some help

Great stuff. Thanks Terry I’ll give it a go.