((HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_10) == GPIO_PIN_SET) ? 1:0); I am using this command to read a pin, Actually it is Arduino format. So I want to ask if this works in ST as well and if the same syntax work does it read both 1 and 0?

[Peter BENSCH · Accepted solution]

Welcome, @SRehm.2​, to the community!

We're sorry that the answer took a little while to come:

The condition mentioned is called a ternary operator, not specific to Arduino, which is based on C++, but also available in C. If you wanted to use this for the assignment to a variable, you can use it exactly like this.

Does it answer your question?

Regards

/Peter

[Piranha]

That code is written by someone, who doesn't know the C/C++ languages, because the following code does exactly the same:

(HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_10) == GPIO_PIN_SET);

But it's safer and more efficient to convert it to this:

(HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_10) != GPIO_PIN_RESET);