barometer8  2.0.0.0
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Barometer 8 Click

Barometer 8 Click is a compact add-on board used to measure air pressure in a specific environment. This board features the ILPS22QS, an ultra-compact piezoresistive absolute pressure sensor that functions as a digital output barometer from STMicroelectronics. The ILPS22QS comprises a sensing element and an IC chip for signal processing in one package, converts pressure into a 24-bit digital value, and sends the information via a configurable host interface that supports SPI and I2C serial communications. It has a selectable dual full-scale absolute pressure range, up to 1260hPa and 4060hPa, with an accuracy of 0.5hPa over a wide operating temperature range.

Click Product page


Click library

  • Author : Stefan Filipovic
  • Date : Mar 2022.
  • Type : I2C/SPI type

Software Support

We provide a library for the Barometer 8 Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.

Package can be downloaded/installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for Barometer 8 Click driver.

Standard key functions :

Example key functions :

  • barometer8_write_register This function writes a desired data byte to the selected register.
    err_t barometer8_write_register ( barometer8_t *ctx, uint8_t reg, uint8_t data_in );
  • barometer8_read_register This function reads a data byte from the selected register.
    err_t barometer8_read_register ( barometer8_t *ctx, uint8_t reg, uint8_t *data_out );
  • barometer8_read_data This function reads the pressure and temperature raw data and converts them to mBar and Celsius.
    err_t barometer8_read_data ( barometer8_t *ctx, float *pressure, float *temperature );

Example Description

This example demonstrates the use of Barometer 8 Click board by reading and displaying the pressure and temperature values.

The demo application is composed of two sections :

Application Init

Initializes the driver and performs the Click default configuration.

void application_init ( void )
{
log_cfg_t log_cfg;
barometer8_cfg_t barometer8_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
barometer8_cfg_setup( &barometer8_cfg );
BAROMETER8_MAP_MIKROBUS( barometer8_cfg, MIKROBUS_1 );
err_t init_flag = barometer8_init( &barometer8, &barometer8_cfg );
if ( ( I2C_MASTER_ERROR == init_flag ) || ( SPI_MASTER_ERROR == init_flag ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
if ( BAROMETER8_ERROR == barometer8_default_cfg ( &barometer8 ) )
{
log_error( &logger, " Default configuration." );
for ( ; ; );
}
log_info( &logger, " Application Task " );
}

Application Task

Reads and displays the pressure and temperature data on the USB UART every 250ms approximately, as per output data rate (ODR) bits configuration.

void application_task ( void )
{
float pressure, temperature;
if ( BAROMETER8_OK == barometer8_read_data ( &barometer8, &pressure, &temperature ) )
{
log_printf ( &logger, " Pressure: %.1f mBar\r\n", pressure );
log_printf ( &logger, " Temperature: %.2f C\r\n\n", temperature );
}
Delay_ms ( 5 );
}

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

  • MikroSDK.Board
  • MikroSDK.Log
  • Click.Barometer8

Additional notes and informations

Depending on the development board you are using, you may need USB UART Click, USB UART 2 Click or RS232 Click to connect to your PC, for development systems with no UART to USB interface available on the board. UART terminal is available in all MikroElektronika compilers.


barometer8_cfg_setup
void barometer8_cfg_setup(barometer8_cfg_t *cfg)
Barometer 8 configuration object setup function.
BAROMETER8_ERROR
@ BAROMETER8_ERROR
Definition: barometer8.h:301
barometer8_cfg_t
Barometer 8 Click configuration object.
Definition: barometer8.h:275
barometer8_s
Barometer 8 Click context object.
Definition: barometer8.h:255
barometer8_default_cfg
err_t barometer8_default_cfg(barometer8_t *ctx)
Barometer 8 default configuration function.
barometer8_write_register
err_t barometer8_write_register(barometer8_t *ctx, uint8_t reg, uint8_t data_in)
Barometer 8 write register function.
BAROMETER8_OK
@ BAROMETER8_OK
Definition: barometer8.h:300
barometer8_init
err_t barometer8_init(barometer8_t *ctx, barometer8_cfg_t *cfg)
Barometer 8 initialization function.
application_task
void application_task(void)
Definition: main.c:66
barometer8_read_data
err_t barometer8_read_data(barometer8_t *ctx, float *pressure, float *temperature)
Barometer 8 read data function.
application_init
void application_init(void)
Definition: main.c:29
barometer8_read_register
err_t barometer8_read_register(barometer8_t *ctx, uint8_t reg, uint8_t *data_out)
Barometer 8 read register function.
BAROMETER8_MAP_MIKROBUS
#define BAROMETER8_MAP_MIKROBUS(cfg, mikrobus)
MikroBUS pin mapping.
Definition: barometer8.h:222