LPS22HB Pressure Sensor

Measure barometric air pressure and temperature from LPS22HB sensor

Since R2021b

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Libraries:
Simulink Coder Support Package for STMicroelectronics Nucleo Boards / Sensors

Description

The LPS22HB Pressure Sensor block measures barometric air pressure using the LPS22HB pressure sensor interfaced with the Nucleo/STM32L475-Discovery board. This sensor comprises of a sensing element to measure the absolute pressure. The block also measures the temperature from the embedded temperature sensor in LPS22HB Sensor.

You can also select an output data rate in the block, and use the low pass filter option for filtering the measured pressure values.

Ports

Output

Pressure — Barometric air pressure as measured by LPS22HB sensor

scalar

The block outputs the barometric air pressure in Pascals (Pa).

Dependencies

This output port appears only if you select the Pressure (Pa) parameter.

Data Types: double

Temperature — Temperature measured by LPS22HB sensor

scalar

Temperature (in ℃) measured by LPS22HB sensor connected to Nucleo/STM32L475-Discovery board.

Dependencies

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

Data Types: double

Status — Status of pressure and temperature measurements

0 | 1 | -1

Status of pressure and temperature measurements, specified as a 1-by-2 vector. 0 indicates that the data read is new, 1 indicates that the data read is not new, and -1 indicates that the corresponding output is not selected.

Dependencies

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

Data Types: int8

Parameters

I2C module — Specify I2C module

2 (default) | positive integer

Specify the I2C module on the board. The I2C bus frequency, serial clock (SCL) pin and serial data (SDA) pin are taken according to the corresponding I2C module entry in the configuration parameters.

I2C address — Peripheral addresses to communicate with sensor peripherals

0x5C (default) | 0x5D

The peripheral addresses to communicate with the LPS22HB sensor are decided by the state of the SA0 pin on the hardware board. This table provides the peripheral addresses corresponding to the pin and their state.

Pin Name	Pin State	Peripheral Address
SA0	0	0x5C
	1	0x5D

Pressure (Pa) — Set output port for reading pressure

on (default) | off

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

Temperature (℃) — Set output port for reading temperature

on (default) | off

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

Status — Set output port for obtaining status

off (default) | on

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

Output data rate (ODR) — Rate at which pressure data is sampled

1 Hz (default) | 10 Hz | 25 Hz | 50 Hz | 75 Hz

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

Enable low pass filter — Enable low pass filter for pressure data

off (default) | on |

Enable the low pass filter for reading pressure values.

Select the bandwidth — Bandwidth of low pass filter

ODR/9 (default) | ODR/20

Select the required bandwidth of the low pass filter.

Dependencies

This parameter appears only if you select the Enable low pass filter parameter.

Sample time — Time interval to read data

-1 (default) | positive integer

Specify how often this block reads the data from the LPS22HB 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.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

Version History

Introduced in R2021b