Problem configuring TWI (I2C) interface

[msu]

Hello,

I'm trying to configure the TWIM for a nRF52832 microcontroller. I have created the following *overlay file:

&i2c1 {										/* a */
	compatible = "nordic,nrf-twim";			/* b */
	status = "okay";						/* c */
	clock-frequency = <100000>;				/* d */

	twis_device1:nRF52832@40004000 {				/* e */
		// device compatible				/* f */
		label = "i2c nRF52832 addr 0x28";	/* g */
       	reg = <0x40004000>;						/* h */
   	};
};	

I have the following error in line "e" ('twis_device1:nRF52832@40004000'):

Node nRF52832 should have "compatible" property
Node should only occur on the undefined bus.
/soc/i2c@40004000/nRF52832@40004000/

And after a build I get the following error:

/ncs/central_uart/build/zephyr/include/generated/devicetree_generated.h:12568:37: error: 'DT_N_S_soc_S_i2c_40004000_P_sda_pin' undeclared (first use in this function); did you mean 'DT_N_S_soc_S_i2c_40004000_P_status'?
12568 | #define DT_N_NODELABEL_i2c1         DT_N_S_soc_S_i2c_40004000

Could you please explain me what I'm not configuring correctly and how to solve it? Thanks for your attention.

[Øivind]

Hi,

In an i2c device node, the reg property and address after the node name should be the i2c address, not the memory address of the bus.
So both 40004000 should be 28.

[msu]

Hello,

I have replaced the address and I still have the error:

Node nRF52832 should have "compatible" property
Node should only occur on the undefined bus.
/soc/i2c@40004000/nRF52832@28/

Do I have to modify '/soc/i2c@40004000/nRF52832@28/'?

[Øivind]

Which version of the nRF Connect SDK are you using?

[msu]

2.3.0

[Øivind]

At the moment I am not able to reproduce the error you are seeing.

Could you try adding this to the overlay?

&spi1 {
    status = "disabled";
};

If that does not work, could you please show me the prj.conf file? Do you have CONFIG_I2C=y ?

Which board are you building for, and are you able to reproduce this error on the hello_world sample?