stm32: do not declare ADC interrupts unless using SIMPLEFOC_STM32_ADC_INTERRUPT - #546

Looks good. I usually use DMA for the ADC results, but have used interrupts as well, and had to hunt down that function in the library code and disable it. Better to control it with a #define so you don't have to modify the library code.

Hey @Moddingear ,

This will not work in oour case.
We do use interrupts in the library actually.

When the timer does not have interrupt counter we use interrupt callback to downsample the readings.
If the timer does have the repetition counter we do not use interrupts.

The proposed PR woudl break the readings on timers without repetition counter.

So we might add a new flag somewhere called
SIMPLEFOC_STM32_ADC_DISABLE_RC_FALLBACK

And condition the ADC handlers on this maybe. If this flag is not defined then the interrupts are not allowed and you can condition the adc handler definitions on this.

Modified as requested.