ADC triggering on value

[petr_mosna]

Hello,

Is it possible to set trigger when ADC converter reach a certain value? I mean that an interrupt rutine is called when ADC reach a user value. Can you please provide or refer a piece of code?

Thank,

Petr

[RhSilicon]

As far as I know, comparators are used for this.

The Analog Comparator is used to compare the voltage of two analog inputs, with a digital output
indicating which input voltage is higher. Inputs can either be one of the selectable internal references or
from external pins.

See here: https://kalapiinfotech.in/stm32-peripherals-comparator/

[MasterT]

https://github.com/STMicroelectronics/STM32CubeH7/tree/master/Projects/NUCLEO-H743ZI/Examples/ADC/ADC_AnalogWatchdog

[waclawek.jan]

Which STM32?

In most STM32 ADC there is a feature called ADC watchdog. If, after a conversion, the converted value is outside a region defined by two registers, an interrupt is invoked (if enabled).

Read the ADC chapter in RM.

JW