I2C_SDA pin value setting

[Icont.1]

Good evening, I would need, for a project with a custom board that mounts a micro STM32H7A3... to be able to set the value of a pin to 0 or 1 during the code and not via MX cube for the initial settings which function could I use? I would like to point out that the pin in question is set as I2C_SDA and not GPIO_output generic.

[waclawek.jan]

Switch it to GPIO output in GPIOx_MODER, and then back again when you need so.

> which function

You need only the bitwise AND (&) and OR (|) operators for that.

JW

[TDK]

The behavior of SDA is governed by the state machine of the peripheral.

If you want to set it to an arbitrary value, initialize the pin as a GPIO output, then set it back to I2C AF mode when finished.

[Icont.1]

thanks for the answers but I did not understand how to do. I have no way to use the functions Hal_GPOI on the SDA pin because I have no way to get to the reference GPOIx since I have no references to code of how this particular pin is defined.