I use "Espressif IoT Development Framework. Official development framework for ESP32", i2s bck and ws is ok,but
my adc need mclk,how can i open esp32 mclk? (stm32 cpu i2s include mclk, bck, ws ) thank you.

thank you for your help, I download "arduino-esp32-master", and find the spi,it's very good. but can't find I2S and SDIO.

how can i control esp32 spi1,spi2,and sdio? ,(sdio is master,is read sd file ),please give me a example,Thank you very much。