cant understand where the schedular uses the timer

RE: cant understand where the schedular uses the timer

makouda — Mon, 23 Nov 2015 16:24:54 GMT

and when scheduler is used, where in the code the scheduler add the timer events to it's queue, this is my question

RE: cant understand where the schedular uses the timer

Einar Thorsrud — Mon, 23 Nov 2015 16:21:47 GMT

APP_TIMER_APPSH_INIT() is used to initialize the application time when you are using the scheduler. If the scheduler is not used, you should initialize the application timer using APP_TIMER_INIT() and set the last parameter to false.

RE: cant understand where the schedular uses the timer

makouda — Mon, 23 Nov 2015 16:13:02 GMT

but to scheduler an event you call app_sched_event_put but I dont see this code in APP_TIMER_APPSH_INIT add add the timer handler

RE: cant understand where the schedular uses the timer

Einar Thorsrud — Tue, 10 Nov 2015 14:12:54 GMT

Then I am not sure I fully understand your question. The Scheduler it self has no concept of time. It just allows you to schedule events by putting them in a queue and then check the queue and process events by calling app_sched_execute(), which you typically call regularly from your main loop (in every iteration).

RE: cant understand where the schedular uses the timer

makouda — Tue, 10 Nov 2015 13:05:52 GMT

app_timer_appsh.c contain two functions app_timer_evt_get and app_timer_evt_schedule which are note called from app_timer_create so I still didnt get it where is the relation between time and scheduler

RE: cant understand where the schedular uses the timer

Einar Thorsrud — Tue, 10 Nov 2015 12:54:57 GMT

The application timer can be used without the scheduler, and vise versa. If you use both the application timer and the scheduler, you should use APP_TIMER_APPSH_INIT() to initialize the application timer, as you do in your code. The code that makes the application timer use the scheduler are located in app_timer_appsh.c and app_timer_appsh.h, which you will find under components\libraries\timer\ in the SDK.

For a practical guide to the application timer I recommend you to walk through the Application Timer Tutorial. Then, if you need to use the scheduler, you should walk through the Scheduler Tutorial as well.