NRF5340 : Issue in Configuring Non-blocking I2C in Zephyr OS

[priyaj]

I'm using the nRF Connect SDK on nrf5340dk and encountering issues when trying to use the non-blocking (asynchronous) I2C API.

i am particularly getting this error -ENOSYS while using this function : i2c_transfer_cb_dt()

When I switch from the blocking API to the non-blocking one, it starts giving errors or unexpected behavior. Could someone please help me understand the correct way to use non-blocking I2C in the SDK?

7851.nrf5340dk_nrf5340_cpuapp.overlay

• Are there specific configurations or prerequisites required?

• Any example of correct usage would be really helpful.

Thanks in advance!

[Sigurd]

Hi!

What NCS version are you using? I think it's only supported in the latest versions

Might need to add this:

CONFIG_RTIO=y
CONFIG_I2C_RTIO=y

[7in]

Hi!

   me too;

   NCS 3.4.0  nrf52840DK

 i2c_transfer_cb_dt()  point NULL 

config

CONFIG_USB_DEVICE_STACK_NEXT=y

CONFIG_CDC_ACM_SERIAL_INITIALIZE_AT_BOOT=n

CONFIG_USBD_HID_SUPPORT=y

CONFIG_LOG=y

CONFIG_USBD_LOG_LEVEL_WRN=y

CONFIG_USBD_HID_LOG_LEVEL_WRN=y

CONFIG_UDC_DRIVER_LOG_LEVEL_WRN=y

CONFIG_SAMPLE_USBD_PID=0x0007

CONFIG_GPIO=y

CONFIG_INPUT=y

CONFIG_I2C=y

CONFIG_I2C_NRFX=y

CONFIG_I2C_CALLBACK=y

CONFIG_RTIO=y

CONFIG_I2C_RTIO=y

 * Copyright (c) 2023 Nordic Semiconductor ASA

 *

 * SPDX-License-Identifier: Apache-2.0

 */

&spi1 {

        status = "disabled";

};

/ {

        hid_dev_0: hid_dev_0 {

                compatible = "zephyr,hid-device";

                label = "HID0";

                protocol-code = "none";

                in-polling-period-us = <1000>;

                in-report-size = <64>;

        };

        zephyr,user {

                //label = "tp_int";

                tp-int-gpios = <&gpio0 30 GPIO_PULL_UP>;   /* 改用标准属性名 gpios */

        };

};

&i2c0 {

        clock-frequency = <DT_FREQ_K(400)>;

        compatible = "nordic,nrf-twim";

        easydma-maxcnt-bits = <16>;

        touchpad: touchpad_amira@2c {

                compatible = "zephyr,i2c-device";

                reg = <0x2c>;

        };

};

api->transfer_cb == NULL!!!

 could you help me!

Thinks_——_