Could you, or someone else, possibly give an example of this code using timer1 instead of timer2?
#ARDUINO TIMER INTERRUPT SETUP HOW TO#
It seems timer1 is a 16bit timer, instead of timer2 which is 8 bits, but I am not certain on how to port your code to use this other timer. This doesn't seem to be fast enough to make an led look like its not blinking.
#ARDUINO TIMER INTERRUPT SETUP SOFTWARE#
Is there a way to increase this value for applications that require more interrupts? Writing an 8bit software pwm requires a minimum of 256 interrupts to complete the pwm, making less than 4 pwm cycles per second. In your example, it only allows for 1000 interrupts per second.
Like I said, this is a total guess, because I have no idea what these things are, but I think this is at least closer to what you intended. So why not try replacing these lines of code: If you really want to make sure a bit is turned off, you should use &= and the bitwise not operator ~. You are not changing the value of TCCR2, no matter what its current value, because it is the same as saying: For example, when you do the following line: Is it possible that other bits are already set in TCCR2? Doing a bitwise-OR between a zero and a bit that is already set to 1 will leave that bit at 1, not change it to zero. This is a total shot in the dark, but when you do this: If I use a prescaler of /64 and an overflow occurs every 250 interrupts (256 - 6, since I reset the Timer to 6), I have 1000 interrupts per secondīut this corresponds to roughly two seconds when I run the program. I don't understand this behaviour: The Arduino runs at 16 Mhz. In the ISR routine, the counter is increased approximately each second (with a slight skew). BUT: The variable "second" is only increased every two seconds. Serial.println("Initializing timerinterrupt") īasically, the code works. Aruino runs at 16 Mhz, so we have 1000 Overflows per second. #define RESET_TIMER2 TCNT2 = INIT_TIMER_COUNT I use the following code to increment a counter every second: #include Continuing with my interrupt experiements, I have a question about the timer interrupts.
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