Are I2C pins can be reconfigured?

[AndrewJiajie]

I changed the I2C pins to below, and it not work. so is it possible to reconfigure the I2C pin? what should I do since I already set to 8&9 in the hardware board?

    const nrf_drv_twi_config_t twi_lm75b_config = {
       //.scl                = 8,//ARDUINO_SCL_PIN,(originally 27)
       //.sda                = 9,//ARDUINO_SDA_PIN,(originally 26)
       .frequency          = NRF_TWI_FREQ_400K,
       .interrupt_priority = APP_IRQ_PRIORITY_HIGH,
       .clear_bus_init     = false
    };

[Ashish]

The I2C pins are reconfigurable.

I am guessing you are using the nrf52-dk and thus you won't be able to use Pin 8 and Pin 9 as they are already is use by UART and NFC. Take a look at the Development Kit User Guide (page 16).

[awneil]

Ashish said:

The I2C pins are reconfigurable

Indeed:

Ashish said:

already is use by UART and NFC

Note that the NFC function has to be specifically disabled if you want to use the NFC pins as GPIO:

https://devzone.nordicsemi.com/f/nordic-q-a/47788/use-nfc-pin-and-reset-pin-as-inputs/189273#189273