So core of the working principle is this (pic)
When AB voltage is slightly above zero, i get interrupt from optocoupler. ( Red dot)
Now we need to wait to α = 30 (3333us from interrupt)
We are now at blue dot.
Now we need to start firing thyristors, first is AB pair at α = 30, next is AC pair at α ...

Hi, i am beginner ESP-IDF programmer, my first goal-project is real time control of 6 phase thyristor rectifier.
So sequence of work is :
Interrupt Read
Start timer that need to count 3333us
After this, i need to start thyristor firing sequence (pwm on output)
6 steps, every step is spaced every ...