Hi all. I've implemented Sebastian Vik & cmaglie's timer code. I've got it working as is, with the LED. And I also tried a Serial.println and that works fine too.
However after transplanting the code to something more meaty (RGB Pixel light string) - the TC3_Handler only executes once.
The LEDs driver is using the hardware SPI channel - could it be anything to do with that? To rule out a clash of interrupts with the LED driver, I tried TC4/5 then TC0, but I still only get the first frame.
Any ideas? I'll post a video of the lights, if I get it working. (The code works otherwise - if I base the timer on time, it works fine)
I'll post the code, but you'd need the lights to see it:
(note the previous version of the code works without the timer)