ESB no external crystal

[Martin]

Hi

I have a custom board with no external crystal. Using S130 works fine, but I want to enhance communication with some data being sent over ESB using timeslot API.

Therefore I'm running with this clock config:

#define NRF_CLOCK_LFCLKSRC      {.source        = NRF_CLOCK_LF_SRC_RC,  \
                                       .rc_ctiv       = 1,              \
                                       .rc_temp_ctiv  = 1,				\
   };

Can I still make use of ESB?

My main problem is, I can send but always receive NRF_ESB_EVENT_TX_FAILED from my TX device. RX-Device is not receiving anything as far as I can tell...

Any hint is appreciated

[Jørgen Kvalvaag]

ESB requires the HFCLK to be running, i believe it is not using the LFCLK at all.

Try adding

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

near the start of main().

[Martin]

No, currently not.