ESP32 IO_MUX GPIO_MATRIX

[Paul85]

Hello,

I'm new in ESP32 programming. Reading di esp_idf documentation is seems that through IO_MUX and/or GPIO MATRIX most of the peripheals available can be assigned to any GPIO pin, but I cannot understand how to do that. Should I write a specific inizialization funtion for the pin assigment or should I use the menuconfig? Is there an example?

Thank you in advance,

Paul

[ESP_Sprite]

In ESP-IDF, for most peripherals you will pass the pin number you want the signals on as parameters to the initialization function for the driver. The driver will then figure out how to tweak the GPIO matrix and/or IO mux to hook everything up correctly. Some examples in ESP-IDF do not hardcode the GPIO pin they pass to the drivers, but have a menuconfig option whose value gets passed on. You can copy that mechanism to your own projects as well, if you desire, but it's also perfectly acceptable to pass a hardcoded value to the driver.