Device bmi270@68 is not ready when using nrf5340 and the BMI270 sample

[lcj]

I am trying to get the BMI270 working with a nrf5340 DK. I have read Unable to Connect nRF5340DK with BMI270 Over I2C - Nordic Q&A - Nordic DevZone - Nordic DevZone (nordicsemi.com) and Falied to Connect nRF5340DK with BMI270 Over I2C - Nordic Q&A - Nordic DevZone - Nordic DevZone (nordicsemi.com), but neither had an answer. I understand the comment that the BMI270 driver "does a lot of stuff", but that did not seem like a reasonable answer to me considering it seems to work with the nrf52833. I added the:

zephyr,concat-buf-size = <128>;

Which did not solve my issue which was that I ran the sample and got this error message:

Device bmi270@68 is not ready

[Håkon Alseth]

Hi,

 

Do you have external pull resistors?

If not, try to enable internal pull-ups in DT:

&pinctrl {
	i2c1_my_default: i2c1_my_default {
		group1 {
			psels = <NRF_PSEL(TWIM_SDA, 1, 2)>,
				<NRF_PSEL(TWIM_SCL, 1, 3)>;
            bias-pull-up;
		};
	};

	i2c1_my_sleep: i2c1_my_sleep {
		group1 {
			psels = <NRF_PSEL(TWIM_SDA, 1, 2)>,
				<NRF_PSEL(TWIM_SCL, 1, 3)>;
			low-power-enable;
		};
	};
};

&i2c1 {
	compatible = "nordic,nrf-twim";
	status = "okay";
	pinctrl-0 = <&i2c1_my_default>;
	pinctrl-1 = <&i2c1_my_sleep>;
	pinctrl-names = "default", "sleep";
	zephyr,concat-buf-size = <128>;
    bmi270@68 {
            compatible = "bosch,bmi270";
            reg = <0x68>;
    };	
};

 

Kind regards,

Håkon

[lcj]

I have a board to connect w/the nRF5340 DK with a separate I2C SCL/SDA (currently P0.24 and P0.23 respectively). For the BMI270 INT1 is P0.06 and INT2 is P0.09.

I replaced the overlay with what you provided but got the same response.

I did have to add one additional item because there is a SAO address bit for the BMI and I need to make this MCU GPIO Output LOW and it will be BMI270 default i2c address 0b1101000 (0x68).

&gpio0 {
    status = "okay";
    p0_19_hog: p0_19_hog {
        gpio-hog;
        gpios = <19 GPIO_ACTIVE_HIGH>;
        output-low;
    };
};

[lcj]

With the logging:

Device bmi270@68 is not ready
[00:00:00.257,202] <dbg> bmi270: write_config_file: writing config file max_fifo
[00:00:00.258,880] <err> i2c_nrfx_twim: Need to use the internal driver buffer but its size is insufficient (1 + 256 > 128). Adjust the zephyr,concat-buf-size or zephyr,flash-buf-max-size property (the one with greater value) in the "i2c@c000" node.
[00:00:00.260,528] <err> i2c_nrfx_twim: Need to use the internal driver buffer but its size is insufficient (1 + 256 > 128). Adjust the zephyr,concat-buf-size or zephyr,flash-buf-max-size property (the one with greater value) in the "i2c@c000" node.
*** Booting nRF Connect SDK v3.5.99-ncs1-1 ***

I'm also curious how this works without specifying INT1 and INT2 anywhere.

[lcj]

Got it working thanks to the debug statements! I appreciate your help.

&i2c3 {
	compatible = "nordic,nrf-twim";
	status = "okay";
	pinctrl-0 = <&i2c3_my_default>;
	pinctrl-1 = <&i2c3_my_sleep>;
	pinctrl-names = "default", "sleep";
	zephyr,concat-buf-size = <257>;
    bmi270@68 {
            compatible = "bosch,bmi270";
            reg = <0x68>;
    };	
};

[Joao Colombari]

Facing the same problem here...

Could you share your project??

Thanks a lot!

[Joao Colombari]

Nevermind, now it works fine.

I was just using:

zephyr,deferred-init;

and not initializing in main. 

All the best!

[Luis Santos]

Hello Joao, 

What is mean?

Cold you please share your code and .dts?