nRF Connect SDK v2.4.2 nrf_dm sample : adv_start in the callback, ASSERTION FAIL

RE: nRF Connect SDK v2.4.2 nrf_dm sample : adv_start in the callback, ASSERTION FAIL

Gary Kuo — Tue, 16 Jan 2024 08:18:57 GMT

Ok, thank you.

RE: nRF Connect SDK v2.4.2 nrf_dm sample : adv_start in the callback, ASSERTION FAIL

Naeem Maroof — Sun, 14 Jan 2024 21:58:30 GMT

I did not get your point.

If the issue is different from the main issue of ticket then please open a new ticket with correct title as it helps locating and responding different cases.

RE: nRF Connect SDK v2.4.2 nrf_dm sample : adv_start in the callback, ASSERTION FAIL

Gary Kuo — Tue, 09 Jan 2024 08:14:58 GMT

Thanks, it work fine.

I also tried to change it to a limited-time scan_start()

(scan_param.timeout=100).

It worked normally the first time, but it had no effect the second time, and other key actions were also invalid (LED flashing stops), and there was no other error message.

What situations might it encounter?

Do I need to initiate another Nordic Q&A?

static void adv_work_handle(struct k_work *item)
{
	// adv_start();
	scan_start();
}

RE: nRF Connect SDK v2.4.2 nrf_dm sample : adv_start in the callback, ASSERTION FAIL

Naeem Maroof — Mon, 08 Jan 2024 14:40:03 GMT

Hi,

This is what I mean:

void button_pressed(const struct device *dev, struct gpio_callback *cb, uint32_t pins)
{
	printk("\n>>>> Button PRESSED >>>> ");
	
	adv_param = &adv_param_conn;
	k_work_submit(&adv_work);

	//adv_start();
	//advflag = 1;	
}

Not calling the adv_start() or setting variable in the button_pressed callback, but rather calling k_work_submit to submit a work item where the task in the work handle is adv_start:

static void adv_work_handle(struct k_work *item)
{
	adv_start();
}

the work handle and work item are defined in the main.c.

/BR, Naeem

RE: nRF Connect SDK v2.4.2 nrf_dm sample : adv_start in the callback, ASSERTION FAIL

Gary Kuo — Mon, 08 Jan 2024 02:45:01 GMT

Thank you for your answer.

I currently still use the advflag method.

Workqueue refers to using k_msgq_put and k_msgq_get ?

I've looked at the ticket you provided, but I want an immediate start rather than a delayed start, which is the opposite of what I want

RE: nRF Connect SDK v2.4.2 nrf_dm sample : adv_start in the callback, ASSERTION FAIL

Naeem Maroof — Fri, 05 Jan 2024 16:34:57 GMT

Hello,

Apologies for the delayed response.

Is there any progress at your end?

I can see what you are having.

Calling adv_start() in the callback leads to CPU panic due to fatal error which points to the semaphore in kernel.

You might need to do debugging to know what / why it is caused.

Nonetheless, you can put the function call in the workqueue and it will be processed.

You can also have a look at this ticket which started with the same kind of error: Ble from Callback (Fatal Error)

/BR, Naeem

RE: nRF Connect SDK v2.4.2 nrf_dm sample : adv_start in the callback, ASSERTION FAIL

Naeem Maroof — Thu, 21 Dec 2023 13:59:33 GMT

Hi Gary,

I have been assigned this ticket and I will look into this and update your when I have more information.

Regards,
Naeem