BLE not advertising on Custom board.

RE: BLE not advertising on Custom board.

Kaja — Tue, 18 Feb 2020 13:08:55 GMT

Hi David,

could you please share the schematic and layout files? Obs, this is a public ticket, so if you want that information to stay private, please change the case to private.
Also could you tell me the load capacitance, CL, of the 32 MHz crystal your using?

Best regards,
Kaja

RE: BLE not advertising on Custom board.

David — Mon, 17 Feb 2020 15:11:20 GMT

Hello Kenneth, I haven't done this. Can you give me more details about this?

Also, the code hangs when I add this line:

NRF_CLOCK->TASKS_HFCLKSTART = 1;
while (NRF_CLOCK->EVENTS_HFCLKSTARTED == 0);

I have tried swapping the crystal but still not result. Here is the 32MHz crystal I am using.

https://lcsc.com/product-detail/SMD-Oscillators-XO_KDS-Daishinku_1XTV26000PEA_KDS-Daishinku-KDS-1XTV26000PEA_C253733.html

https://datasheet.lcsc.com/szlcsc/1810221841_KDS-Daishinku-1XTV26000PEA_C253733.pdf

Its the same datasheet, just a 26MHz version. Please Is there any other reason why it may not be starting?

RE: BLE not advertising on Custom board.

Kenneth — Mon, 17 Feb 2020 14:44:51 GMT

I don't expect that the 32kHz is the problem here. Likely the problem is the 32MHz or a design issue. Have you run for instance rf test or DTM to verify carrier frequency?

Best regards,
Kenneth