RADIO_IRQHandler not called after power cycle

RE: RADIO_IRQHandler not called after power cycle

Johannes — Wed, 18 Dec 2019 18:46:22 GMT

actually the explanation is here:

https://devzone.nordicsemi.com/f/nordic-q-a/33321/nrf52810-project-on-pca20032-only-starts-with-debugger/128022#128022

RE: RADIO_IRQHandler not called after power cycle

Johannes — Wed, 18 Dec 2019 18:45:13 GMT

Hi Hakon,

this was not the same issue but gave me the right pointer:

I removed the line:

NRF_POWER->DCDCEN = (POWER_DCDCEN_DCDCEN_Enabled << POWER_DCDCEN_DCDCEN_Pos);

and now it works. apparently the 52840 module I am using does not have DCDC hardware.

Apparently the system will shut down as soon as the radio draws power.

It is still strange that the issue is masked when using the debugger. Any explanation for this?

Johannes

RE: RADIO_IRQHandler not called after power cycle

Håkon Alseth — Wed, 18 Dec 2019 09:43:33 GMT

Hi,

Could this be the source of the issue you're seeing?

https://devzone.nordicsemi.com/f/nordic-q-a/37477/unable-to-run-uart-ble-app-example-without-debugger

Kind regards,

Håkon

RE: RADIO_IRQHandler not called after power cycle

wpaul — Wed, 18 Dec 2019 03:02:56 GMT

The major difference in operation between having the debugger connected and not is that when the debugger is attached, it prevents the CPU from entering low power mode, i.e. the WFI instruction won't actually spin down the CPU or turn off any clocks.

Unfortunately I can't really say why that would cause the symptoms you describe without seeing the code, but hopefully this will provide a clue. Do you have code to put the chip in low power? It might be it still needs some adjustments to work correctly on the 52840.

-Bill