I want to know the preemtion of softdevice

[Tommy_Hwang]

Hello. Nowadays I'm trying to upload the softdevice for the RTOS based on the freertos.

As you know, determinism is very important for the realtime.

I want to know the preemtion method of softdevice and how can it works frequently.

Could I know about it?

[tesc]

Hi Tommy,

I am not quite sure I understand what is your question, but I will try to answer it anyway. Please tell me if I miss the point.

We have a FreeRTOS example using the SoftDevice in our SDK. You will find the example code under [sdk folder]\examples\ble_peripheral\ble_app_hrs_freertos, and it is documented here: Heart Rate Application with FreeRTOS

See also the general documentation for FreeRTOS support.

The SoftDevice has tight timing requirements, and it will have the highest interrupt priority. This is true also for the FreeRTOS examples. The FreeRTOS port will not block global interrupt flags when compiled to be used with a SoftDevice. This means the FreeRTOS system is subject to preemption when the SoftDevice performs timing critical tasks.

Regards, Terje

[Tommy_Hwang]

Thank you for your great answer!