Freertos: app_timer_cnt_get and app_timer_cnt_diff_compute

[Sergy]

Is there implementation of these functions available for Freertos version of app_timer?

app_timer_cnt_get()

app_timer_cnt_diff_compute()

they are required for LESC operations.

Thanks!

[Joakim Jakobsen]

Hi. 

There is actually no need for those functions in FreeRTOS. 

Instead, you can use 

xTaskGetTickCount - which returns the count of ticks since vTaskStartScheduler was called.

(Ref: https://www.freertos.org/a00021.html#xTaskGetTickCount)

When using an RTOS, it is best to use RTOS features as much as possible. 

Best regards, 
Joakim

[Sergy]

Hi Joakim,

Thanks for the reply. Actually I agree that its best to use RTOS features, however currently when I include auth_tracker.c into the project its asking me for the following function:

so shall we add them to app_timer_freertos.c implementation?

Regards,

Sergey

[Susheel Nuguru]

You are right Sergy,

Exclude the direct dependency of your app with RTC by including app_timer_freertos.c and let FreeRTOS take control on the tick. Your app actually can purely use freertos timers if you wish, but if you do not want to change the app_timer code, then it is understandable and just replace app_timer.c with app_timer_freertos.c in your project

[Sergy]

Susheel, thats exactly what I did indeed, just its missing the above named functions. May be its a good idea to add them for compatibility :)

[Ali Rumane]

Hi Susheel Nuguru,

I am getting the same error with app_timer_cnt_diff_compute and app_timer_cnt_get (referred from auth_status_tracker.o). I have already included app_timer_freertos.c and app_timer.c isn't present in my project. 

Do I need to edit app_timer_freertos.c with something like this? 

 

uint32_t app_timer_cnt_get(void)
{
    return xTaskGetTickCount();
}