Do you know what is the reason for which I2S MCK output in unsupported on Zero? As far as I got it, the MCK[0] is on PA09, which is available on the connectors. I couldn’t trace the peripheral that could overtake it. So, again, do you know why it’s unavailable? And do you know if there’s any workaround? (In case that it’s just not available in the default configuration).
Never mind, it seems that I just made a simple mistake. So, first of all, this pin is generally used by TCC0 (I have no idea why I said I couldn’t trace it). And once you replace the line 111, i.e.
Hi,
I'm answering, because that's first and only accurate post about SAMD21 and I2S MCK.
I found it very helpful although not enough for TS4657, which needs MCK to be 256*LRCLK (or FS).
For this you have to change I2S Generic Clock prescaler in line 85ish from: