What is the most accurate way of determining the time between two interrupt events?

[olney_one]

I am new to ESP32s. I have an application that generates two interrupts on separate GPIO lines. Accessing timestamps for real time seems to be an integer. Would using this in conjunction with a CPU clock tick count be the most accurate way of measuring the interval? Or is there a better way?

[MicroController]

esp_timer_get_time() and esp_cpu_get_cycle_count() are probably the best option.
The CPU cycle count is 32 bits, so at 240MHz you can measure intervals up to ~17.9 seconds using this counter alone.

[olney_one]

Thank you, I will try this.

[olney_one]

This works really well and is extremely fast. Thank you again.