NCS Conflict between Timer Interrupt and BLE stack?

[Mr.NCK]

Hi,

  I want to use timer interrupt in BLE code. If enable timer inside the BLE code. The code will not work properly. I want to know why this is happening like that and how can I implement the timer interrupt inside the BLE code. I am using nrf5340dk and NCS v 1.9.1 SDK. And also I want to check with the same code GPIO Interrupt and delay also not working fine. Kindly, help me to resolve the issue

Thanks & Regards,

Navin Chakravarthy K

[helsing]

Hi Navin,

Sorry, I did not notice you had posted a reply as your case has been marked as "Verified answer". Is your case solved, or would you like me to have a look at your code?

Best regards,

Håkon

[Mr.NCK]

HI Helsing,

  I follow those points and once, I have called the timer in the thread function it starts working.

Thanks and Regards,

Navin 

[Mr.NCK]

HI Helsing,

  I follow those points and once, I have called the timer in the thread function it starts working.

Instead of delay. I want to use this timer function. Can you able to help me?. Kindly share me example if anything is available

Thanks and Regards,

Navin 

[helsing]

Hi Navin,

Sorry for the delay.

I noticed I had given you the wrong link for the Work Item. Have you considered this solution?

Best regards,

Håkon

[helsing]

Hi Navin,

Here are two possible solutions:

Solution A, to run the sampling from a separate thread using a delay in the similar way to what you do currently. Delays in Zephyr are not implemented as busy waits. They allow other threads to run concurrently.

Solution B:  Use a zephyr timer that triggers a work item. Consult the documentation for Timers, specifically check out Using a Timer Expiry Function:

The following code uses a timer to perform a non-trivial action on a periodic basis. Since the required work cannot be done at interrupt level, the timer’s expiry function submits a work item to the system workqueue, whose thread performs the work.

void my_work_handler(struct k_work *work)
{
    /* do the processing that needs to be done periodically */
    ...
}

K_WORK_DEFINE(my_work, my_work_handler);

void my_timer_handler(struct k_timer *dummy)
{
    k_work_submit(&my_work);
}

K_TIMER_DEFINE(my_timer, my_timer_handler, NULL);

...

/* start periodic timer that expires once every second */
k_timer_start(&my_timer, K_SECONDS(1), K_SECONDS(1));

Best regards,

Håkon

[Mr.NCK]

Hi Helsing,

Thank you so much, i will check and you know.