unexpected sd_app_evt_wait() returning

[Torsten Robitzki]

Hello,

I have a BLE application, running a GATT server on a nrf52832. The main loop, is basically an endless loop, starting with a call to `sd_app_evt_wait()`, then handling events provided by `sd_ble_evt_get()`. I toggle a debug pin at the beginning and the end of the main loops body.

When I connect with a BLE client to the GATT server, the debug pin starts to toggle very quickly, with a period of ~12.5µs. I use a counter to ignore the first 1000 runs through the main loop, after which I insert a break point. No call to `sd_ble_evt_get()` returns any event. Before hitting the breakpoint, I store NVIC->ISPR[0] in a variable. The value of this variable is 1, which indicates, that `sd_app_evt_wait()` returned doe to a pending radio interrupt.

How can I avoid, to have `sd_app_evt_wait()` returning, even when there is no event to handle? How can I further investigate what happens here? (Softdevice in use is S132 Version 6.1.0).

Thanks in advance,

Torsten

[Simonr]

Hi Torsten

Before hitting the breakpoint, I store NVIC->ISPR[0] in a variable. The value of this variable is 1

 This is not Radio, but POWER/Clock. You should also check NVIC->ISPR[1] as the nRF52 have more than 32 interrupt sources. I'm guessing there is an interrupt that isn't configured correctly in there that is preventing your application from going to sleep.

Best regards,

Simon