Adafruit Tag Reader Example not working with certain RST and IRQ pin

[shockline]

I am trying to run adafruit_tag_reader example on nRF52840 DK.

Problem :

If these are my pins in sdk_config.h it works fine

#ifndef PN532_RESET
#define PN532_RESET NRF_GPIO_PIN_MAP(1, 13)
#endif

#ifndef PN532_IRQ
#define PN532_IRQ NRF_GPIO_PIN_MAP(1, 14)
#endif

Whereas this doesn't work.

#ifndef PN532_RESET
#define PN532_RESET NRF_GPIO_PIN_MAP(0, 9)
#endif

#ifndef PN532_IRQ
#define PN532_IRQ NRF_GPIO_PIN_MAP(0, 10)
#endif

[Vidar Berg]

Hi,

These pins are not connected to the Arduino pin headers by default, but to the nordic NFC connector, see NFC antenna interface. 

[shockline]

This worked for me.

From https://infocenter.nordicsemi.com/index.jsp?topic=%2Fug_nrf52840_dk%2FUG%2Fnrf52840_DK%2Fhw_nfc_if.html&cp=3_0_4_7_10

When using SEGGER Embedded Studio, go to Project > Edit Options > Code > Preprocessor > Preprocessor Definitions and add the CONFIG_NFCT_PINS_AS_GPIOS variable.