nrf91 how to use twi(i2c)?

[john.liu]

ncs v1.9.1

Reference nrf\applications\serial_lte_modem\src\twi

This example does not see how to configure the pin.so how to config SCK and SDA Pin?

Thanks!!!

[john.liu]

  Reference zephyr.dts

  

  i2c0: i2c@8000 {

                compatible = "nordic,nrf-twim";

                #address-cells = < 0x1 >;

                #size-cells = < 0x0 >;

                reg = < 0x8000 0x1000 >;

                clock-frequency = < 0x186a0 >;

                interrupts = < 0x8 0x1 >;

                status = "disabled";

                label = "I2C_0";

            };

But no define SCK and SDA pin.

[Sigurd Hellesvik]

Hi

You can add them yourself, using the syntax seen in zephyr.dts for i2c2:

            i2c2: arduino_i2c: i2c@a000 {
                compatible = "nordic,nrf-twim";
                #address-cells = < 0x1 >;
                #size-cells = < 0x0 >;
                reg = < 0xa000 0x1000 >;
                clock-frequency = < 0x186a0 >;
                interrupts = < 0xa 0x1 >;
                status = "disabled";
                label = "I2C_2";
                sda-pin = < 0x1e >;
                scl-pin = < 0x1f >;

Regards,
Sigurd Hellesvik

[john.liu]

thank you.I wank to know i2c0,i2c1...which pin is used and why can't it be found.