Unable to use NFC p0.10 as GPIO.

[noob_123]

Hi,

I am trying to use NFC Pin 0.10 as GPIO. It works fine on nRF52833DK using CONFIG_NFCT_PINS_AS_GPIOS=y and by removing R44, R46 and placing R43 and R45. But it doesn't work on the custom board even if CONFIG_NFCT_PINS_AS_GPIOS=y is enabled and I have checked 0x1000120C register and it reads out as 0x1000120C: FFFFFFFE.

Is there anything specific related to Pin 0.10 on custom board files that I am missing?

On custom board nRF52833_CJAA is being used.

Thanks

[Kazi Afroza Sultana]

Hello, 

nrfjprog --memrd 0x1000120C output as FFFFFFFF; so it seems pins 0.10 is configured as GPIO pin. Can you share the code you use to configure the pin as output and set it high?

I can not say surely what is the wrong with this custom board. Perhaps the GPIO pin is not routed to where you measure. Could you please check out your layout again? If you want can share with us also, I can make the case private.

Thanks.

BR

Kazi

[noob_123]

In the prj.conf I am setting `CONFIG_NFCT_PINS_AS_GPIOS=y` and in the board overlay P0.10 is set active high using 

<&gpio0 10 GPIO_ACTIVE_HIGH>; 

and set as output using  gpio_pin_configure_dt(&pin, GPIO_OUTPUT_INACTIVE);

I have checked the PCB using multimeter and the P0.10 is connected to the point where it is used. 

Thanks

[Kazi Afroza Sultana]

Hello,

It looks strange. Is everything else working as it should on the custom board apart from this NFC pin?