Are All Interrupts diabled during a BLE event?

[Ronny Vrijelinck]

I have implement the systick with the idea to use it for delay functions. The systick is running normal if no BLE Events occur, but during a BLE event it seems to be stopped. Are all interrupts disabled during a BLE event from the softdevice? What is the best method to implement mS delays during a BLE event?

[Hung Bui]

Hi Ronny,

What do you mean by "a BLE event" ? It's when the radio active and communicate or when the application receive the interrupt event ?

I don't think all the interrupt will be disabled during BLE event. Of course the softdevice has higher interrupt priority level than application. But you should receive your interrupt after the softdevice finish with its interrupt handler.

Please be noted that on the nRF52 Systick will be paused when the CPU sleeping. This should not be the issue if you keep the CPU on. This may not related to your issue.

For your purpose, I think the best way is to use the RTC timer (or use our app_timer) to implement mS delay.

[Hung Bui]

Hi Ronny,

Please be noted that same applied for RTC, there still a latency can cause by softdevice when it has to take care of the BLE event. The maximum latency is described at chapter Interrupt model and processor availability in the softdevice specification.