RE: How exactly do you enable i2c0, i2c1 or i2c3 on the nrf9160 dk?

Albrecht Markus Schellenberger — Wed, 29 Jun 2022 06:27:13 GMT

Hello Jerome,

[quote user=""]How do you enable any of the i2c peripherals on the nRF9160 dk boards?[/quote]

You can check all default configured peripherals in ../<your_application_root/<your_build_folder>/zephyr/zephyr.dts. On the nRF9160 DK, &i2c2 is enabled by default.

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 = "okay";
	label = "I2C_2";
	pinctrl-0 = < &i2c2_default >;
	pinctrl-1 = < &i2c2_sleep >;
	pinctrl-names = "default", "sleep";
};

Due to memory instantiation, you have to disable &uart0 to be able to enable &i2c0 and &spi3 to be able to enable &i2c3 respectively.

Additionally,

CONFIG_I2C=y

needs to be set in your prj.conf.

Unless you are aware of the fact that you have to switch over to RTT if logging is needed, disabling &uart0 is not recommended from my side.

Regards,

Markus