No signal with custom nRF52840 board with SKY66114 front end.nf

[Adam]

Hello,

I have a problem where the nRF52840 is not advertising. The code runs in the debugger but there is no radio signal. I've already sent the schematic and layout. I've isolated the problem to the nRF52 itself and not the front end. Would powering VDD but not VDDH cause something like this? I haven't found anything in the registers that would explain the situation. The code works on the PCA10056 board.

Running the code for a while causes the error:

<error> app: SOFTDEVICE: ASSERTION FAILED

The POWER register is sometimes 0x0000000 and sometimes 0x0000001 but it makes no difference. The STATE register is set to 0 (disabled) but the PCA10056 board shows the same.

Would appreciate any pointers on this.

Adam

[FormerMember]

Could you check "manually" if you can start the 32 MHz crystal on the custom board?

 

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