LSM303C IMU Sensor

Measure linear acceleration, magnetic field strength, and temperature from LSM303C sensor

Since R2025a

• 

Libraries:
STM32 Microcontroller Blockset / Sensors / IMU Sensors

Description

The LSM303C IMU Sensor block outputs the values of linear acceleration and magnetic field strength along x-, y- and z- axes as measured by the LSM303C sensor connected to STM32 Processors. The block also outputs the temperature as read by the LSM303C sensor.

Examples

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Ports

Output

Acceleration — Linear acceleration measured by LSM303C sensor

row vector

Linear acceleration (in m/s²) measured by LSM303C sensor connected to STM32 Processors, along the x-, y- and z- axes, specified as a n-by-3 vector, where n is the value for samples per frame.

Dependencies

This output port appears only if you select the Acceleration (m/s²) parameter.

Data Types: double

Magnetic Field — Magnetic field strength measured by LSM303C sensor

row vector

Magnetic field strength (in µT) measured by LSM303C sensor connected to STM32 Processors, along the x-, y- and z- axes, specified as a n-by-3 vector, where n is the value for samples per frame.

Dependencies

This output port appears only if you select the Magnetic Field (µT) parameter.

Data Types: double

Temperature — Temperature measured by LSM303C sensor

scalar

Temperature (in ℃) measured by LSM303C sensor connected to STM32 Processors.

Dependencies

This output port appears only if you select the Temperature (℃) parameter.

Data Types: double

Acceleration Status — Status of acceleration value

0 | 1

Status of acceleration value along the three axes, specified as a row vector in the order [z,y,x], to indicate if the data read is the new value or not. 0 indicates that the data read is new and 1 indicates that the data read is not new.

Dependencies

This output port appears only if you select the Acceleration Status parameter.

Data Types: Boolean

Magnetic Field Status — Status of magnetic field value

0 | 1

Status of magnetic field value along the three axes, specified as a row vector in the order [z,y,x], to indicate if the data read is the new value or not. 0 indicates that the data read is new and 1 indicates that the data read is not new.

Dependencies

This output port appears only if you select the Magnetic Field Status parameter.

Data Types: double

Timestamp — Timestamp at which data is read

matrix | (n)-by-1

Timestamp (in seconds) at which data is read from the sensor, returned as n-by-1 matrix, where n is the value for samples per frame.

Dependencies

This output port appears only if you select the Timestamp parameter.

Data Types: double

Parameters

Main Tab

I2C module — I2C communication module

I2C1 (default) | scalar

Specify the I2C module on the STM32 Processors to communicate with sensor peripherals.

Programmatic Use

Block Parameter: I2CModule

Acceleration (m/s²) — Set output port for reading acceleration

on (default) | off

Select this parameter to set Acceleration as one of the output ports.

Programmatic Use

Block Parameter: IsActiveAcceleration

Magnetic Field (µT) — Set output port for reading magnetic field

on (default) | off

Select this parameter to set Magnetic Field as one of the output ports.

Programmatic Use

Block Parameter: IsActiveMagnetometer

Temperature (℃) — Set output port for reading temperature

on (default) | off

Select this parameter to set Temperature as one of the output ports.

Programmatic Use

Block Parameter: IsActiveTemperature

Acceleration Status — Set output port for obtaining acceleration status

off (default) | on

Select this parameter to set Acceleration Status as one of the output ports.

Programmatic Use

Block Parameter: IsAccelStatus

Magnetic Field Status — Set output port for obtaining magnetic field status

off (default) | on

Select this parameter to set Magnetic Field Status as one of the output ports.

Programmatic Use

Block Parameter: IsMagStatus

Timestamp — Set output port for obtaining timestamp

off (default) | on

Select this parameter to set Timestamp as one of the output ports.

Programmatic Use

Block Parameter: IsActiveTimeStamp

Sample time — Time interval to read data

-1 (default) | positive integer

Specify how often this block reads the data from the LSM303 sensor. When you set this parameter to -1, Simulink determines the best sample time for the block based on the block context within the model. The output sample time is the product of Sample time that you specify.

Programmatic Use

Block Parameter: SampleTime

Advanced Tab

Accelerometer range — Full scale for measuring linear acceleration

±2g (default) | ±4g | ±8g

Select the full scale for measuring linear acceleration (the range of acceleration that the sensor needs to measure).

Programmatic Use

Block Parameter: AccelerationRange

Accelerometer output data rate — Rate at which accelerometer data is sampled

10 Hz (default) | 50 Hz | 100 Hz | 200 Hz | 400 Hz | 800 Hz

Select the output data rate at which accelerometer data is sampled, which also determines the bandwidth.

Programmatic Use

Block Parameter: AccelerometerODR

Magnetometer range — Full scale for measuring magnetic field

±16 gauss (default)

Select the full scale for measuring linear acceleration (the range of acceleration that the sensor needs to measure).

Programmatic Use

Block Parameter: MagnetometerRange

Magnetometer output data rate — Rate at which magnetometer data is sampled

0.625 Hz (default) | 1.25 Hz | 2.5 Hz | 5 Hz | 10 Hz | 20 Hz | 40 Hz | 80 Hz

Select the output data rate at which magnetometer data is sampled.

Programmatic Use

Block Parameter: MagnetometerODR

Extended Capabilities

C/C++ Code Generation
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Version History

Introduced in R2025a