Function code explanation "void rp2040pwmIrq(void)".

[alessandro-satanassi]

What is the purpose of the code "pwm_hw->intr = 0xff;" at line 922 of the SamcoEnhanced.ino file? Why is there such a code?

[SeongGino]

If you'd look at what it's attached to, you'd notice that it's part of the hardware timer to flag when the camera is ready to be read.

Is there any reason you're confused and looking at that line of the code specifically?

[Prow7]

That line clears the PWM IRQ flags.

[alessandro-satanassi]

Why were PWMs used and not Timers?

[SeongGino]

Because PWM is the most appropriate for a constant entity like the camera polling interval.

Anyways, I believe that should adequately answer the topic.

[Prow7]

The RP2040 doesn't have general purpose timers. You use a PWM channel with no output as a timer.

[alessandro-satanassi]

OK thank you. Now I get it. For the port to the Esp32 micro I will use timers instead (must generalize "IRCamUpdateRate = 209" interrupt per second)