Changing the I2S MCLK GPIO from default in an ESP32C3

[felipedeoliveira]

I'm using my own esp32c3 designed board to work in a audio project with the ES8311 CODEC. My board is based on Lyrat_mini_v1.2 but it uses ESP32C instead.

I've used GPIO 7 conected to the I2S MCLK pin, but in the code there's the folowing message in the i2s.h folder:

i2s_pin_defines.PNG (13.14 KiB) Viewed 2132 times

It says that ESP32 supports setting MCK on GPIO0/GPIO1/GPIO3 only. Is this valid for ESP32C too? Am I gonna have to change the pin on my board?

Schematics of this part on my board:

es8311_to_esp32c3.PNG (100.44 KiB) Viewed 2132 times

[ESP_Sprite]

According to the TRM, ESP32C3 routes the MCLK signal via the GPIO matrix; that means you can select any GPIO for it. (Also, I cleaned up your topic title; seems you accidentally had caps lock on while writing it.)