Comparator Tests for Pulse Counting

[jhugon]

The idea is to use the comparator hooked up to the DAC to analyze the dark current behavior of a SiPM.

• [ ] Count the rate of comparator fires and stream that every N seconds. By sweeping the DAC threshold, this would help create the integral of the so called finger plot.
  • [ ] May need to make a repetition counter that only pulses so many times to be able to debug this easier
• [ ] Measure the interval between comparator firings. Stream an array of intervals or something like that. Maybe there would just be one interval at a time with dead time in between. This would help identify secondary electrons.

[jhugon]

It seems like a comparator interrupt will have to be used to increment the counter and input compare on a timer with either interrupt or DMA for pulse timing.

[jhugon]

It may be possible to clock a timer (counter) directly with the comparator output (possibly externally wired together). That would greatly simplify things. External clock modes 1/2 on TIM2/3?