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  • Case ID: 331345
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undefined reference to device dts ord

ephimee

I'm learning how to write a new device driver for Zephyr 3 using NCS version 2.6.0.

I have watched the ZDS summit video and looked through the shared git repo.

I have created an overlay, CMakeLists.txt files, Kconfig chain, bindings and adjusted prj.conf and main.c

I started with the simple hello world sample.

I have this source code now:

#define MYSENSOR_DEVICE_NODE          DT_NODELABEL(mysensor)

#if DT_NODE_EXISTS(MYSENSOR_DEVICE_NODE)
  #if DT_NODE_HAS_STATUS(MYSENSOR_DEVICE_NODE, okay)
    static const struct device *fpsensor = DEVICE_DT_GET(MYSENSOR_DEVICE_NODE);
  #else
    #error "mysensor status is not okay, thus disabled in devicetree"
  #endif
#else
  #error "mysensor node could not be found in devicetree"
#endif

int main(void)
{
    if (!device_is_ready(fpsensor)) {
        LOG_ERR("unable to get the device ready");
        return -ENODEV;
    } else {
        LOG_INF("initialized successfully");
    }
    LOG_INF("starting while loop");
    while(true) {
        LOG_INF("Hello World from RTT! %s", CONFIG_BOARD);
        k_msleep(1000);
    }
    return 0;
}

I have used the macros to confirm my sensor can be found and has status okay. Otherwise it will print the error.

I also checked the generated ./build/zephyr/zephyr.dts to check if my sensor is present and has status okay.

I also checked the generated ./build/zephyr/.config to check if my sensor is enabled (with y).

I always do pristine build, but still the compiler complains with:

src/main.c:40: undefined reference to `__device_dts_ord_125'

What could be wrong?

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