GPIO pin reassignment (coexistence pins) for nRF5340 + nRF7002EK (NCS v3.0.0)

[gwan0624]

Hello,

I am currently testing a setup combining the nRF5340DK and nRF7002EK using NCS/Toolchain v3.0.0.

I need to reassign the 8 GPIO pins (including Bucken, Grant, etc.) connecting the two chips. But, I have the following two questions:

Question 1: Regarding the 5 Coexistence pins (status0, req, grant, ctrl0, status1)

I have confirmed that the Bucken, IOVDD, and Host-IRQ pins can be changed successfully;

I verified that the functions are correctly mapped by checking the nodes inside the overlay files within the build folder.

However, for the coexistence pins, I could not find any files in the build folder that reference the nrf_radio_coex node.

Were these pin changes actually applied? Or are they being ignored?

(I understand that syntax might correct based on attached link's document, but I'm not sure which specific file I should check to see those changes in build folder. Also, the 'Go to Definition' feature doesn't work for nrf_radio_coex, so I can't find where it's defined)

https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/app_dev/device_guides/wifi_coex.html#enabling_nrf70_series_wi-fi_coexistence

Question 2: Missing definition for SW_CTRL0

I have searched through the shield files but could not find the definition for SW_CTRL0. Where is this pin defined?

Thank you in advance for your help.

Best ragards,

gwan0624

[Amanda Hsieh]

Hi, 

However, for the coexistence pins, I could not find any files in the build folder that reference the nrf_radio_coex node.

Were these pin changes actually applied? Or are they being ignored?

See 

https://github.com/nrfconnect/sdk-nrf/blob/v3.2.4/subsys/mpsl/cx/1wire/mpsl_cx_1wire.c#L32 

https://github.com/nrfconnect/sdk-nrf/blob/v3.2.4/subsys/mpsl/cx/Kconfig

https://github.com/nrfconnect/sdk-nrf/blob/v3.2.4/subsys/mpsl/cx/nrf700x/mpsl_cx_nrf700x.c#L49

https://github.com/nrfconnect/sdk-nrf/blob/v3.2.4/subsys/mpsl/cx/3wire/mpsl_cx_3wire.c#L35

I have searched through the shield files but could not find the definition for SW_CTRL0. Where is this pin defined?

SW_CTRL0 is an output signal from the nRF70 Series device. It is mandatory for 3-wire and 4-wire Shared Antenna mode, and optional otherwise. It corresponds to the Bluetooth LE/IEEE 802.15.4 signal RF_SW_CTRL0 and is used for antenna switch control in Shared Antenna mode. See nRF7002 coexistence.

Regards,
Amanda H.

[gwan0624]

I appreciate your help. It has been quite challenging to find the specific documentation I need, but your explanation has resolved my confusion

[Amanda Hsieh]

Happy to help.