LSM6DSL is failing on custom board with NRF5340soc

[S.M]

Hi ,

I am trying to integrate LSM6DSL to BL5340 module(laird connectivity) through SPI but I am getting failed on initialization. I am noob to NRF so could someone please help to resolve it.

Thanks in advance

/{
alaises{
imusensor         = &imu_sensor;
};
};

&spi4 {
    compatible = "nordic,nrf-spim";
    status = "okay";
    pinctrl-0 = <&spi4_default>;
    pinctrl-1 = <&spi4_sleep>;
    pinctrl-names = "default","sleep";
    cs-gpios = <&gpio0 11 0>;
    /* IMU Sensor 6 Axis: ST LSM6DSL */
	imu_sensor: lsm6dsl@0 {       
		compatible = "st,lsm6dsl";
        status = "okay";
		reg = <0>; 
		irq-gpios = <&gpio0 2 GPIO_ACTIVE_LOW>;
		spi-max-frequency = <10000000>;
	};
};

/* The devicetree node identifier for the "imusensor" alias. */
#define IMU_SENSOR	DT_ALIAS(imusensor)

static const struct device *const imu_dev = DEVICE_DT_GET(IMU_SENSOR);

void imu_init(void) {

	LOG_DBG("%s ", imu_dev->name);

    /* Check if device is initialized correctly. */
	if (!device_is_ready(imu_dev)) {
        /* Not ready, do not use */
		LOG_DBG("IMU device init fail.");
        return;
	}
    
    LOG_DBG("%s IMU Sensor found", imu_dev->name);
}

[runsiv]

Hi I hope you have a great day!

I can't see anything that stands out so I have a few questions:

Which version of NCS are you using?

When you say it fails, which error do you get?

There are a number of Kconfig needed for the sensor which you can find here: https://docs.nordicsemi.com/bundle/ncs-latest/page/kconfig/index.html#!CONFIG_LSM6DSL have you added it to your prj.conf ? This will also include CONFIG_SPI=y and CONFIG_SENSOR=y

Please also provide the prj.conf

Regards

Runar

[S.M]

Hi,

Thanks for the response. Here I attached the thinks needed.

runsiv said:

Which version of NCS are you using?

I am using NCS V2.5.2 

runsiv said:

When you say it fails, which error do you get?

/* Check if device is initialized correctly. */
	if (!device_is_ready(imu_dev)) {
        /* Not ready, do not use */
		LOG_DBG("IMU device init fail.");
        return;
	}

device_is_ready is getting failed 

runsiv said:

Please also provide the prj.conf

# ------------------------SPI--------------
CONFIG_SPI=y
# ---------------------------For IMU LSM6DSL----------------
CONFIG_SENSOR=y
CONFIG_LSM6DSL=y

[runsiv]

Thanks

Could you try the lsm6dsl sample just to see if it works as expected? You can also try to add 

CONFIG_LSM6DSL_TRIGGER_GLOBAL_THREAD=y and 

# Enable GPIO

CONFIG_GPIO=y

As I don't see anything wrong, can you draw me the wiring? 

Regards

Runar

[S.M]

Thanks for the input,

I followed the example but still ended up on same error

Thanks 

S.M

[Kenneth]

Hello,

I suggest to connect a logic analyzer to the spi pins and irq, to see what data is actually sent/received. Just to check if it looks okey (clock toggle as expected, chip select go low, data on miso/mosi etc). Maybe some of the pins are not connected or setup correctly, maybe the sensor is not working/powered as expected.

I notice you are using gpio port0 pin2, which overlap with nfc, so make sure you do the following in the overlay file:

&uicr {
    nfct-pins-as-gpios;
};

Also, it's spelled aliases, in case that can be part of the problem.

Kenneth

[S.M]

Hi,

Kenneth said:

I suggest to connect a logic analyzer to the spi pins and irq, to see what data is actually sent/received. Just to check if it looks okey (clock toggle as expected, chip select go low, data on miso/mosi etc). Maybe some of the pins are not connected or setup correctly, maybe the sensor is not working/powered as expected.

sorry that provisions are not available in our board

Kenneth said:

I notice you are using gpio port0 pin2, which overlap with nfc, so make sure you do the following in the overlay file:

&uicr {
    nfct-pins-as-gpios;
};

Thanks for the input I tried but facing same error

Kenneth said:

Also, it's spelled aliases, in case that can be part of the problem.

Sorry that's my typo mistake in overlay it was fine

Thanks

S.M

[Kenneth]

I suggest to buy an LSM6DSL module and connect to an nRF5340 DK for further debugging, then you will also be able to connect a logic analyzer to the pins in questions.

Kenneth