how to create a timer ms on nRF Connect SDK ?

[yoyou]

Hi,

as follow is nRF5 SDK code to  create a timer ms.

how to create a timer ms on nRF Connect SDK ?

APP_TIMER_DEF(m_timer_speed_1ms);
int timer_lms=0;

static void timer_1ms_handler(void * p_context)
{
  timer_lms++;

}

void main（）

{

   ret_code_t err_code = app_timer_create(&m_timer_speed_1ms, APP_TIMER_MODE_REPEATED, timer_1ms_handler);
   APP_ERROR_CHECK(app_timer_start(m_timer_speed_1ms, APP_TIMER_TICKS(1),NULL));

  for (;;){idle_state_handle();}

}

thank  a lot

[Edvin]

Hello,

It looks like you are on the right track. Does it work? If not, what does app_timer_create() and app_timer_start return?

Best regards,

Edvin

[yoyou]

Hello, Edvin,

thanks for reply.

These codes work well on nRF SDK17.02,

but i'm using nRF Connect SDK 1.8.0.

build error:  app_timer.h: No such file or directory

is it need cross use nRF SDK17?

what does the text in the red box mean？

what shall I do?

thanks

[Edvin]

Oh, sorry. I didn't catch that you were doing this in NCS. 

The app_timer is not present in the nRF Connect SDK (NCS). You can look into the k_timer documentation which in many ways is the equivalent of app_timer in NCS.

I can recommend the section Using a Timer Expiry Function, as this also shows you how to implement the k_work. It may not be needed in your case, but if you have some interrupt dependent work you need to do in your app_timer, you can use this.

Based on your snippet above, you shouldn't need the k_work, but you can increment the ms_timer directly in your "my_timer_handler()" interrupt.

Best regards,

Edvin