nRF5340: The NCS BME68X IAQ driver on nRF5340 DK

Question

Hi Support Team,

I want to use the NCS BME68X IAQ driver on nRF5340 DK, a BME680 sensor was connected on the I2C1 bus.
The BSEC lib has been downloaded and put into NCS SDK. But there is a strange compiling error about the sensor device node, I double-checked and can't find the reason, could you help give some guidance? Thank you very much.

1. the Error info:

c:/ncs/toolchains/c57af46cb7/opt/zephyr-sdk/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.2.0/../../../../arm-zephyr-eabi/bin/ld.bfd.exe: 
app/libapp.a(bme680test.c.obj): in function `z_impl_sensor_channel_get':
C:/ncs/v2.5.2/zephyr/include/zephyr/drivers/sensor.h:767: undefined reference to `__device_dts_ord_139'
c:/ncs/toolchains/c57af46cb7/opt/zephyr-sdk/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.2.0/../../../../arm-zephyr-eabi/bin/ld.bfd.exe: 
app/libapp.a(bme680test.c.obj): in function `bme680_read_channels':
C:\02_dataLogger\IOTDL\build\IOTDL/../../src/bme680test.c:67: undefined reference to `__device_dts_ord_139'

2. The DTS overlay:

aliases {
		gassensor = &bme680;
    };

&i2c1 {
	status = "okay";
	compatible = "nordic,nrf-twim";
	pinctrl-0 = <&i2c1_default>;
	pinctrl-1 = <&i2c1_sleep>;
	pinctrl-names = "default", "sleep";

	bme680:bme680@77 {
		compatible = "bosch,bme680";
		status = "okay";
		reg = <0x77>;
	}; 
};

&pinctrl {
	i2c1_default: i2c1_default {
		group1 {
			psels = <NRF_PSEL(TWIM_SDA, 1, 2)>,
				<NRF_PSEL(TWIM_SCL, 1, 3)>;
		};
	};

	i2c1_sleep: i2c1_sleep {
		group1 {
			psels = <NRF_PSEL(TWIM_SDA, 1, 2)>,
				<NRF_PSEL(TWIM_SCL, 1, 3)>;
			low-power-enable;
		};
	};
};

3. prj.conf:

CONFIG_SENSOR=y
CONFIG_BME68X_IAQ=y
CONFIG_BME680=n
CONFIG_SETTINGS=y
CONFIG_SETTINGS_NONE=n

4. my code:

    bool ret = false;
    struct sensor_value temp, press, humidity, gas;

    const struct device *const dev_I2C = DEVICE_DT_GET(DT_ALIAS(i2c1)); 
    if (!device_is_ready(dev_I2C)) {
		LOG_WRN("%s: I2C device not ready.", dev_I2C->name);
		return false;
	} else {
		LOG_WRN("%s: I2C device ready.", dev_I2C->name);
	}

    const struct device *const dev_gassensor = DEVICE_DT_GET_ANY(bosch_bme680); 
    if (!device_is_ready(dev_gassensor)) {
		LOG_ERR("%s: gas sensor BME680 not ready.", dev_gassensor->name);
		return false;
	} else {
		LOG_WRN("%s: gas sensor BME680 ready.", dev_gassensor->name);
	}

	LOG_INF("Found gas sensor device \"%s\", getting gas sensor data with BSEC", dev_gassensor->name);
    ret = sensor_sample_fetch(dev_gassensor);
    ret = sensor_channel_get(dev_gassensor, SENSOR_CHAN_AMBIENT_TEMP, &temp);
    ret = sensor_channel_get(dev_gassensor, SENSOR_CHAN_PRESS, &press);
    ret = sensor_channel_get(dev_gassensor, SENSOR_CHAN_HUMIDITY, &humidity);
    ret = sensor_channel_get(dev_gassensor, SENSOR_CHAN_IAQ, &gas);

    LOG_INF("BME680 BSEC data- T: %d.%06d; P: %d.%06d; H: %d.%06d; G(IAQ): %d.%06d",
            temp.val1, temp.val2, press.val1, press.val2,
            humidity.val1, humidity.val2, gas.val1, gas.val2);

In addition, I checked the generated files devicetree_generated.h, zephyr.dts, the bme680 node (139 /soc/peripheral@50000000/i2c@9000/bme680@77) can be found in these files.

Best regards,
Yanpeng Wu

Yanpengwu · Accepted Answer

Hi Abhijith, 
 The problem was fixed. Thank you for the guidance link. Actually the error was not caused by DTS. The root cause is the BSEC lib needs a partition for internal state storage, when I enabled the partition manager and made sure there is a 'settings_storage' partition in the file build\partitions.yml, the compilation was successful. 
 Best regards, Yanpeng Wu

nRF5340: The NCS BME68X IAQ driver on nRF5340 DK

Top Replies