Problem in enabling the bmi270 sensor for thingy53

[Sachin Rawat]

Hi ,

I am working on thingy53 and using ncs 1.9.1 I need to enable the BMI270 sensor and need the acceleration and gyroscope data from it.
So for that, I primary using the sample which is located at    ncs/zephyr/samples/sensor/bmi270 

 But I have facing some sort of problems in i2c/pins  for bmi270. 

Could you help me to get the bmi270 working and print it's values 

Here is the prf.conf and rest of the file is located in that folder

CONFIG_STDOUT_CONSOLE=y
CONFIG_I2C=y
CONFIG_SENSOR=y
CONFIG_BMI270=y

CONFIG_LOG=y
CONFIG_USE_SEGGER_RTT=y
CONFIG_LOG_BACKEND_RTT=y
CONFIG_LOG_BACKEND_UART=y
CONFIG_SEGGER_RTT_BUFFER_SIZE_DOWN=64
CONFIG_MAIN_STACK_SIZE=8192
CONFIG_SEGGER_RTT_BUFFER_SIZE_UP=4096
CONFIG_LOG_BUFFER_SIZE=4096

When I have used bmi270 application as it is, it is showing the error for  -  &arduino_i2c  that it is not  known 

So I simply changes the app.overlay file and modify &arduino_i2c  to  i2c1   

&i2c1 {

    status = "okay";

 

    bmi270@68 {

        compatible = "bosch,bmi270";

        reg = <0x68>;

        label = "bmi270";

    };

};

So after doing so, the board is showing error on Jlink 

If this is not the right way to change from arduino_i2c, than please help me to correct the app.overlay from sample 

P.S. I have already enabled the sensors like bme680,adxl362,bh1749 in my another custom application. 

[Kazi Afroza Sultana]

Hello,

If you look at the schematic design of thingy:53, you can see there SDA and SCL pin is not connected. 

You can try to connect with Spi insetead https://github.com/nrfconnect/sdk-zephyr/blob/v3.1.99-ncs1/boards/arm/thingy53_nrf5340/thingy53_nrf5340_common.dts#L191 .

Thanks.

Best Regards,

Kazi Afroza Sultana

[Sachin Rawat]

Hi,
Previously I was using the default thingy53_nrf5340_common.dts file but it by default showing an error.

So therefore I follow the bmi270 sample

Please help 

[Kazi Afroza Sultana]

Hello,

Can you try to set the following configuration?

CONFIG_BMI270_BUS_I2C=n

CONFIG_BMI270_BUS_SPI=y

Thanks.

Best Regards,

Kazi Afroza sultana

[Sachin Rawat]

Hi
There is no config other than config_bmi270 = y 

Am I missing something?

[Kazi Afroza Sultana]

Hello,

You have to set this in prj.conf file.

[Sachin Rawat]

I have set these 2 lines in prj but as I told you earlier there is no line in config like this
So it is showing error

What should I need to do?

[Kazi Afroza Sultana]

Hello,

It seems like bmi270 is missing zephyr binding to spi-device. You can try to add this (bosch,bmi270-spi. yaml) from here https://github.com/nrfconnect/sdk-zephyr/commit/6cbb84c3eed97efa33375ae24d050abf49ee5b86 inside the \zephyr\dts\bindings\sensor folder and see of it works.

Thanks.

BR

Kazi