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?

[msu]

I still have the same error. Below the prj.conf file:

#
# Copyright (c) 2018 Nordic Semiconductor
#
# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
#

# Enable the UART driver
CONFIG_UART_ASYNC_API=y
CONFIG_NRFX_UARTE0=y
CONFIG_SERIAL=y
CONFIG_CONSOLE=y
CONFIG_UART_CONSOLE=y

# Enable the BLE stack with GATT Client configuration
CONFIG_BT=y
CONFIG_BT_CENTRAL=y
CONFIG_BT_SMP=y
CONFIG_BT_GATT_CLIENT=y

# Enable the BLE modules from NCS
CONFIG_BT_NUS_CLIENT=y
CONFIG_BT_SCAN=y
CONFIG_BT_SCAN_FILTER_ENABLE=y
CONFIG_BT_SCAN_UUID_CNT=1
CONFIG_BT_SCAN_ADDRESS_CNT=1
CONFIG_BT_GATT_DM=y
CONFIG_HEAP_MEM_POOL_SIZE=2048
CONFIG_BT_MAX_PAIRED=1
CONFIG_BT_MAX_CONN=1

# This example requires more workqueue stack
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048

# Enable bonding
CONFIG_BT_SETTINGS=y
CONFIG_FLASH=y
CONFIG_FLASH_PAGE_LAYOUT=y
CONFIG_FLASH_MAP=y
CONFIG_NVS=y
CONFIG_SETTINGS=y

# Enable use of the non-minimal C functionality (stdio.h).
CONFIG_NEWLIB_LIBC=y

# Config logger
CONFIG_LOG=y
CONFIG_USE_SEGGER_RTT=y
CONFIG_LOG_BACKEND_RTT=y
CONFIG_LOG_BACKEND_UART=y
CONFIG_LOG_PRINTK=n
CONFIG_BT_DEBUG_LOG=y
CONFIG_BT_GATT_DM_DATA_PRINT=y

CONFIG_ASSERT=y

# Config I2C
CONFIG_GPIO=y
CONFIG_I2C=y
CONFIG_I2C_NRFX=y

CONFIG_SHELL=y
CONFIG_I2C_SHELL=y

I'm building the project for an nRF52832.

[msu]

Hello,

I come back to this subject as I still have problems to configure the I2C interface. Is there any parameter I'm missing?