TIMER2 running at 500us interval with ANT stack enabled

[Paul]

I have TIMER2 running at 500us interval. ANT is working as 100Hz master. Understood softdevice will affect the timing and cause some latency. I am guessing it is delaying the TIMER2_IRQHandler response by more than 500us which is enough to miss a TIMER2 interrupt.

I am using TIMER2 as a local communication logic to talk to a device and debugging some issues. Looks like the softdevice is occupying CPU too long. I hope it is not, otherwise I will have to add extra hardware to do the communication :-( which is BAD. :-D

[Stefan Birnir Sverrisson]

Hi Paul

I suspect you are correct, the ANT communication may be blocking the CPU for too long. Are you using S210 4.0.1? If so, look at the S210 SDS 2.0 sections 11.2 and 11.3 for CPU availability. If your processing time for each TIMER2 interrupt is less than 100us, you could set the interrupt priority to APP_HIGH to see if that helps.