I am a beginner in using stm32 programming. I figured out that there are two types of complete conversions for ADC. So what are the differences between HAL_ADC_ConvCpltCallback() and HAL_ADC_PollForConversion() functions?

I’m working on a custom alarm clock that will be sold to consumers. I’ve designed the hardware and software of the system and I’m using STM32. Everything seems to be working well and it’s been running successfully for a few days.

Hello everyone i am making stm32 nucleo project in arduino ide. I used to use Ardunio and i can easily take output from any pin however now i am using stm32 nucleo l073 rz and i cant take ant output. I want to make simple thing. When i pressed the button if conditions are satisfied my water pump have to be work in any speed i dont want to control fan speed. This is my code block thanks. When i pressed button all things are worked except engine.
And there are many pins stm i cant find the proper one for engine