ADC DMA/programmed start/stop by timer compare?

[Lohi]

Hallo Gurus:

Newbie level question..'health issues' making me less efficient, and some pointers to get me started would help a lot.

I want to do a software start of ADC conversions with DMA into a circular buffer...when an external trigger (GPIO?) occurs, start a timer, and have timer compare stop the conversion...like an oscilloscope triggered capture with pre- and post-trigger capture?

Just pointers into the "RTFM", or app note/tutorial, if possible, not wanting to dump a design exercise on anyone! 

[KnarfB]

This could be a starting point: STM32 CubeMX “Timer + ADC + DMA” – Bart Slinger

The timer could be started by a EXTI interrupt from the EXtI IRQ handler (software) or even by using ETR (external trigger) in the timer

hth

KnarfB

[Lohi]

Hello der Knarf! Danke, merçi, obrigado, thanks, shukran...(Trying to be "inclusive":smiling_face_with_halo:)

I'll have a look at this tomorrow (CEST here...) and will mark as solution, if my tired old brain can get around it 🥵

Just the kind of thing I'm looking for!