Build error for example code of MAX30101 with nRF SDK v1.5.0

[MaxPow]

Hello,

I am using example code of MAX30101 Pulse Oximeter sensor with nRF SDK v1.5.0 on board NRF5240DK. I copied the example from the ncs \ v1.5.0 \ zephyr \ samples \ sensor \ max30101 folder to the ncs \ v1.5.0 \ nrf \ samples \ sensor \ max3010 folder. I also created a file nrf5340dk_nrf5340_cpuapp.overlay in the \board folder and added there:

&i2c0 {
    max30101 @ 57 {
        compatible = "max, max30101";
        reg = <0x57>;
        label = "MAX30101";
    };
};
& gpioa {
status = "okay";
};

Building the example code I am getting macro error in devicetree.h file as mentioned below

#define DT_INST(inst, compat) UTIL_CAT(DT_N_INST, DT_DASH(inst, compat))

with following message in output

error: 'DT_N_INST_0_max_max30101_P_label' undeclared (first use in this function)

Please suggest appropriate solution for the above problem.

Thanks.

[Øivind]

Hi,

Try replacing the contents of your overlay file with:

&i2c1 {
    max30101@57 {
        compatible = "max,max30101";
        reg = <0x57>;
        label = "MAX30101";
    };
};

The extra spaces seem to be the source of your problems.

[MaxPow]

Hello! I did not carefully place the code here, my fault sorry, in the file nrf5340dk_nrf5340_cpuapp.overlay it is written without spaces.

[MaxPow]

I have checked the spaces' max, 'and' max30101 are not present. Used i2c1 left only seven lines, but unfortunately it did not help, the same error gets out.

[Øivind]

Ok, could you zip the entire project folder, with the build folder, and send it to me using: Insert->Image/video/file

I can compare it to the one I am using, and the generated files in the build folder should give me an idea what's going on.

[MaxPow]

Ok here is the zip file with example and build folder.max30101.zip

[Øivind]

Looks like you are using i2c1 for an arduino? You also have 2 overlay files, which isn't necessary.

This overlay file tries to use i2c2 instead: 7853.nrf5340dk_nrf5340_cpuapp.overlay

If you still get errors, the full transcript from the output window would be helpful.

[MaxPow]

I managed to solve this problem. I ran the "west update" command and in "Segger Studio" in the "Project" menu I ran "Run Cmake" and everything compiled. Thanks Øivind for trying to help.