NCS Conflict between Timer Interrupt and BLE stack?

RE: NCS Conflict between Timer Interrupt and BLE stack?

Mr.NCK — Sat, 20 Aug 2022 02:05:55 GMT

Hi Helsing,

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

RE: NCS Conflict between Timer Interrupt and BLE stack?

helsing — Thu, 18 Aug 2022 12:41:38 GMT

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

RE: NCS Conflict between Timer Interrupt and BLE stack?

helsing — Wed, 17 Aug 2022 14:15:46 GMT

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

RE: NCS Conflict between Timer Interrupt and BLE stack?

Mr.NCK — Fri, 12 Aug 2022 09:21:25 GMT

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

RE: NCS Conflict between Timer Interrupt and BLE stack?

Mr.NCK — Fri, 12 Aug 2022 09:18:56 GMT

HI Helsing,

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

Thanks and Regards,

Navin

RE: NCS Conflict between Timer Interrupt and BLE stack?

helsing — Thu, 11 Aug 2022 11:34:12 GMT

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

RE: NCS Conflict between Timer Interrupt and BLE stack?

Mr.NCK — Tue, 02 Aug 2022 12:28:25 GMT

Hi Helsing,

I have attached the code below Kindly check and let me the corrections.

devzone.nordicsemi.com/.../ADXL_5F00_BLE_5F00_Timer.zip

Thanks & Regards

Navin

RE: NCS Conflict between Timer Interrupt and BLE stack?

helsing — Mon, 01 Aug 2022 17:57:05 GMT

Hi Navin, sorry for the delay.

Would you be able to share your code?

Are you calling any 'k_timer' functions from any interrupt context, or from inside a callback? If so, then one solution is to use a work item instead. Submit the work item, then call the k_timer from the work item.

Here is the documentation for workque threads and items.

Best regards,

Håkon

Edit: Updated faulty link.

RE: NCS Conflict between Timer Interrupt and BLE stack?

Mr.NCK — Mon, 01 Aug 2022 06:37:56 GMT

Hi Helsing,

We are stuck at this point. we need your assistance to move forward.

Thanks & Regards

Navin

RE: NCS Conflict between Timer Interrupt and BLE stack?

Mr.NCK — Wed, 27 Jul 2022 12:42:51 GMT

Hi Helsing,

This is the actual problem we are facing

We using NRF Connect SDK(zepher)

1. After BLE is enabled, gpio interrupt handler is not at all gettting executed

2. Regards the timer0 which we tried, we are getting os fault if we enable IRQ handler.

3. is it possible to use timer0, timer1 and timer2 if ble is enabled and if yes please share the reference

Thanks & regards,

Navin

RE: NCS Conflict between Timer Interrupt and BLE stack?

Mr.NCK — Wed, 27 Jul 2022 10:58:52 GMT

Hi Helsing,

In the BLE application. I have tried to implement the below function.

k_timer_start(&led_timer, K_MSEC(5000), K_MSEC(5000));

I haven't gotten any compile error. But in the run time I can't be able to see any output an as well my BLE advertisement also gets stopped.

Thanks & Regards

Navin

RE: NCS Conflict between Timer Interrupt and BLE stack?

helsing — Tue, 26 Jul 2022 12:59:52 GMT

Hi Navin,

How have you implemented your timer?

[quote user=""]The code will not work properly.[/quote]

How do you observe this?

Is your code based on any sample? Please check out the zephyr/samples/basic/button for an example showing how to use GPIOs.

Regards,

Håkon