Project fall with repeatedly call nrf_ble_scan_start(&m_scan);

[devcolorama]

Hi!
SDK17.1 S132 nRF52832

I use hrs_c example and it works. But I added adertising code and wanna use both central and periperial at same time. Works, but until the moment when I make connect to my central and disconnect. After disconnect I start 

nrf_ble_scan_start(&m_scan);

again and got 

NRF_BREAKPOINT_COND;

project fall inside 

ret_code_t nrf_ble_scan_start(nrf_ble_scan_t const * const p_scan_ctx)

function.

I can't understand the reason.

There is no any warnings regarding memory in RTT debagger.

So, how to use both central and peripherial at same time? I used it before on SDK15.

[Einar Thorsrud]

Hi,

NRF_BREAKPOINT_COND;

Were is this? In the error or hardfault handler? If so, can you check from which file name and line number you ended up there? And assumign it was form an error check, which error code was it?

[devcolorama]

[Einar Thorsrud]

Hi,

You update the whitelist when you start scanning. This is shown in the stack trace, and is the same as what happened in this case. And it is not allowed to chagne this while in use. The most straight-forward would be to stop advertising before you start scanning (as that involves updating the whitelist), or not using whitelist in one of the cases.

[devcolorama]

Hi!

Do you mean, I use white list for advertising?

If first I make start scanning (already whtelist should be implemented with scanning), and 2nd I run advertising with whitelist. 

I don't need whitelist with advertising. 

But if I correct understood you, start advertising will involves updating the whitelist. Correct?

[Einar Thorsrud]

Hi,

It does not matter if you use whitelisting for advertising. Even if you don't, it is not allowed to update the identities while advertising (and you do this when you initiate scanning with a whitelits).

[devcolorama]

ok, let me check your idea.

[devcolorama]

Hi!

- and you do this when you initiate scanning with a whitelits
I can't understand. I do initiate scanning with a whitelits just when I run start scan?

But I did same operation with or without adverising at same time.

You claim I got error when I update the identities during start scan?

Or is this allowed operatrion- update the identities- but only allowed with scan start.

But! This operation disalowed during advertising? Is this do you meant?

And If I turn off advertising and will make start scan (with update the identities)- this is normal?

Conclution:

update the identities allowed in start scan and disalowed when advertising in proess. Correct? 

[Einar Thorsrud]

Hi,

devcolorama said:

I can't understand. I do initiate scanning with a whitelits just when I run start scan?

The scan module handles this for you, and when you start scanning you get a callback with a NRF_BLE_SCAN_EVT_WHITELIST_REQUEST that  you handle, and this is where it happens. You can see it in the screenshot you pasted iwth the call stack.

devcolorama said:

update the identities allowed in start scan and disalowed when advertising in proess. Correct? 

This is the same for both scanning and advertising.  You are not allowed to update the identities when in use, either scanning or advertising (or both).

[devcolorama]

Hi!

ok, I made scanning without advertising. At this case I also will make like on a picture-  get a callback with a NRF_BLE_SCAN_EVT_WHITELIST_REQUEST after scan start. But, without advertising. 
And you claim that without advertising it will works.

Why will it works if I'll make same operation- start scanning with same get a callback with a NRF_BLE_SCAN_EVT_WHITELIST_REQUEST?

This is I can't understand.

[Einar Thorsrud]

Hi,

I did not fully understand the question, can you please elaborate?

Also, I see that all the locations/addresses is the same in this screenshot as in the one you shared last week, so it looks like this is the same firmware as before?

[devcolorama]

Hi!

I can't understand:

If I disable advertising and I'll work only with scanning, why will it works? 

Isn't it   "update the identities" allowed with scanning?

The picture above (same like 1st one) shows that "update the identities" make after scan start.

 

[Einar Thorsrud]

It works because when you set the witelist you update the identities in the SoftDevice, and that is not allowed while it is being used (for instsance because advertising is active)