No softdevice Events reaches the freeRTOS application

[SatzTechGeek]

Hi, We are in the process of migrating our SDK version from 13 to 15.2 and the error we were facing after porting of SDK is that , we were not able to track the BLE events with freertos task . There is advertising in FAST mode is done and then then there is no events reaching the application. Is there any possible ideas to guess from the behavior observed ?
Thanks in Advance.

[Susheel Nuguru]

There was one known race condition that was introduced in 15.2.

Looks like this is the main problem in your application. Can you check if this solution helps?

[SatzTechGeek]

we have use two task one to control and monitor sensors and  used another task to capture ble events . we modify the nrf_sdh_freertos file as per the solution but the problem there is no clear picture about freertos init and hookup function and how the events are triggered ?.

[Susheel Nuguru]

SatzTechGeek said:

but the problem there is no clear picture about freertos init and hookup function and how the events are triggered ?.

•  The freeRTOS is using RTC1 for its timekeeping and you can see the port files in SDK\external\freertos\portable\CMSIS\nrf52\port_cmsis_systick.c
• not sure which hookup functions are you mentioning here?
• in nrf_sdh_freertos.c you can see that the softdevice events are notified to app using SD_EVT_IRQHandler (also called SWI2_IRQHandler). In freertos, instead of handling these events in IRQ context, we pass them to softdevice_task. Softdevice task will be in blocked state until the SD_EVT_IRQHandler unblocks it.

[SatzTechGeek]

Thanks, Susheel Nuguru solution which you mentioned solve one of our issues.  But when we pass the BLE event handler as a function argument to BLE stack init function and register the function results in a deadlock mechanism. Is that we cant able to register the event handler function by passing  as an argument to stack init