May i use P0.09 and P0.10 as uart function at nRF52832

[zyj]

Hi:

    Because our project using much nRF pin resources, we have to use the defualt function NFC pins (P0.09 and P0.10).we want to set these two pins as uart function ,but i dont know if it is possible? and i have a little test about is ,but when i config  pins as follows:

#define RX_PIN_NUMBER  10
#define TX_PIN_NUMBER  9
#define CTS_PIN_NUMBER 44
#define RTS_PIN_NUMBER 44
#define HWFC           false

the code run to the hard fault.  and when i changed RX_PIN  to 12 and TX _PIN to 11，uart workes correctly.

so can you give me some advices? and what can i do to solve this problem?

Thank you !

[awneil]

You need to define CONFIG_NFCT_PINS_AS_GPIOS

https://devzone.nordicsemi.com/f/nordic-q-a/29041/how-to-enable-p0-09-and-p0-10-as-gpio-pins-on-the-nrf52-instead-of-nfc-pins