cant understand where the schedular uses the timer

[makouda]

I have the following code

 // Initialize timer module, making it use the scheduler
    APP_TIMER_APPSH_INIT(APP_TIMER_PRESCALER, APP_TIMER_MAX_TIMERS, APP_TIMER_OP_QUEUE_SIZE, true);


	//Create timer 1s
	err_code = app_timer_create(&timer_1s_id, APP_TIMER_MODE_REPEATED, timer_1s_timeout_handler);
    APP_ERROR_CHECK(err_code);

how the timer used the schedular , I cant find the code of the SDK the relation between the scheduler and the timer. in which part of the code of schedular the timer_1s_id is bind

[Einar Thorsrud]

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.

[makouda]

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

[Einar Thorsrud]

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).

[makouda]

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

[Einar Thorsrud]

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.