Hello all, this is the first time I am doing something writing to registers so I don't even know if what I want is possible. I made abit of a mix with two codes I found. One is to measure mains grid frequency using a optocoupler and an external interrupt. The second code is to create a PWM on pin 9…

Help with writing to registers for 1Hz pwm and timer interrupt

Coding_Badly September 8, 2021, 2:36am 3

The correct way to clear a flag is to write just that flag...
EIFR = 1; // clear INT0 flag

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