Unable to interface CCS881 with nrf board : error : Failed to get device binding

[Aditya_s]

Hello,

I am trying to run the CCS881 sensor sample in my nrf9160 board. I have made changes to my project config file and main.c file as mentioned in 

https://devzone.nordicsemi.com/f/nordic-q-a/59834/nrf9160-with-ccs811-and-missing-log-in-lte-link-monitor, I am getting an error that my board failed to get the device binding.

I am using nRF Connect v3.4.1, Programmer v3.4.1 and LTE Link Monitor v3.4.1

My source code is from CCS811 example which I copied from  ncs\zephyr\samples\sensor\ccs811 to ncs\nrf\samples\nrf9160\ccs811. What could have caused this error and how can I rectify it?

[Simon]

What NCS version are you using?

Have you connected the sensor correctly to your board? If not, the call to device_get_binding() will fail, since the init function of the CC811 driver will do some different checks to see if it's connected properly or not. Read more about this here.

You should debug the mentioned init function and see if it fails or not.

Best regards,

Simon

[Aditya_s]

Hello Simon,

The NCS tag is v1.2.0

Thank you for your response. My connections are as follows:

Vin     : 5v
GND,WAKE : Ground
SDA   : P0.11

SCL   : P0.12

This is how my overlay file looks like. Are connections okay?

&i2c2 {
status = "ok";
sda-pin = < 12 >;
scl-pin = < 11 >;
clock-frequency = <I2C_BITRATE_STANDARD>;

/* The I2C address could be one of two, here 0x5A is assumed */
ccs811@5A {
compatible = "ams,ccs811";
reg = <0x5A>;
label = "CCS811";
};
};

[Simon]

Try adding compatible = "nordic,nrf-twim"; to the overlay file:

&i2c2 {
    compatible = "nordic,nrf-twim"; //Add this
    status = "okay";
    sda-pin = < 12 >;
    scl-pin = < 11 >;
    clock-frequency = <I2C_BITRATE_S
    ..
    ..
    ..
}

If it still doesn't work, try to debug the init function to see if/what is failing.

Best regards,

Simon

[Aditya_s]

I get this error while building the code:

[Simon]

Could you simply try to add the interrupts field like it's done here? Hmm.. I find it strange that the error comes up when it's set in the file nrf9160_common.dtsi. However, try to set it in the overlay file and see if the error goes away.

Best regards,

Simon