https://devzone.nordicsemi.com/f/nordic-q-a/46104/microsecond-counterI need to implement a uint64_t counter that increments every microseconds that I can then read. I tried to use the timer API and increment the counter in the event handler call back but because it is being called at 1 us rate it never really exits theen-USTelligent Community 13Fri, 12 Apr 2019 19:26:55 GMThttps://devzone.nordicsemi.com/thread/181910?ContentTypeID=1Fri, 12 Apr 2019 19:26:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ebce089f-91de-4aab-a45a-1cc62f90e0ebdvescovi<p>works great thanks!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/181790?ContentTypeID=1Fri, 12 Apr 2019 08:20:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b70a5356-9459-4c52-bd5f-41335f77fadfovrebekk<p>Hi</p> <p>Whenever an interrupt is fired there will be some latency, typically a couple of microseconds, and the timer API might add some additional processing and event forwarding that will increase the latency further.&nbsp;</p> <p>In general it is not recommended to fire off interrupts at such a rapid rate, as it will burn a lot of CPU clock cycles and lead to higher power consumption.&nbsp;</p> <p>I would suggest running a separate timer module at a 1 MHz rate, and do a capture operation on the timer every time you need to read the value. Then the state of the timer will be moved into one of the CC (compare/capture) registers, and you can read out the state from there.&nbsp;</p> <p>At some point you will need to reset the timer, and increment your counter variable, but in principle you don&#39;t have to do it more often than every 2^32/1000000 seconds if you run the timer in 32-bit mode (corresponding to an interrupt every 68 minutes).&nbsp;</p> <p>Best regards<br />Torbjørn</p><div style="clear:both;"></div>