Does anyone know anything about I²S? Am considering connecting a Wolfson WM8631 DAC/ADC to a Raspberry Pi Pico. I've seen I²C output examples, but not taking audio in to the RP2040. I'm assuming if the 2040 generates the BCLK then sampling the Data Input should be easy enough?
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Thanks! Looks like this uses a ADAU1961, which takes an MCLK input This is supplied by the main STM32 MCU (presumably from a Timer peripheral's output pin).