BLE program on n51822 not working

[Muhammad Alam]

Hi,

I'm trying to broadcast my BLE on my custom-made NRF51822 custom board. 

My code was intended to run on Nrf51422, and it runs correctly on my PCA10028 DK with NRF514, however the advertising is not happening on my custom board.

I am able to burn/download/erase my code correctly on my custom board with the Nrf51822 chip, however, no advertising. 

Best,

Alam

[Turbo J]

Most common mistake is to omit the 32768Hz quarz crystal from the custom board.

Omitting that requires software changes (LF clock source change).

[Muhammad Alam]

As far as i know the 32 kHz crystal is optional (as mentioned in the reference circuitry)

Page: 105 https://infocenter.nordicsemi.com/pdf/nRF51822_PS_v3.1.pdf

I have added my 16mhz crystal 

[Turbo J]

In therory the crystal is optional, but the example sources almost all require it to be present in order to run unmodified. Probably because that consumes less current.

I leave the required modification to sdk_config.h as an exercise to the reader. Yes, you need to read those documents on the infocenter and the source code.

[Kenneth]

Tip, If you don't have an external 32kHz crystal you should likely change to:

#define NRF_CLOCK_LFCLKSRC      {.source        = NRF_CLOCK_LF_SRC_RC,            \
                                 .rc_ctiv       = 16,                                \
                                 .rc_temp_ctiv  = 2,                                \
                                 .xtal_accuracy = NRF_CLOCK_LF_XTAL_ACCURACY_250_PPM}