pressure18  2.1.0.0
Main Page

Pressure 18 Click

Pressure 18 Click is a compact add-on board that contains a board-mount pressure sensor. This board features the BMP384, a robust barometric pressure sensor delivering market-leading accuracy in a compact package from Bosch Sensortec. The BMP384 provides a relative accuracy of ±9Pa and typical absolute accuracy of ±50Pa with ultra-low noise, low power consumption, and a temperature coefficient offset of ±1Pa/K. It converts output data into a 24-bit digital value and sends the information via a configurable host interface that supports SPI and I2C serial communications. It measures pressure from 300hPa to 1250hPa over a wide operating temperature range.

Click Product page


Click library

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

Software Support

We provide a library for the Pressure 18 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 Pressure 18 Click driver.

Standard key functions :

Example key functions :

Example Description

This example demonstrates the use of Pressure 18 Click board by reading and displaying the pressure and temperature measurements.

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;
pressure18_cfg_t pressure18_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
pressure18_cfg_setup( &pressure18_cfg );
PRESSURE18_MAP_MIKROBUS( pressure18_cfg, MIKROBUS_1 );
err_t init_flag = pressure18_init( &pressure18, &pressure18_cfg );
if ( ( I2C_MASTER_ERROR == init_flag ) || ( SPI_MASTER_ERROR == init_flag ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
if ( PRESSURE18_ERROR == pressure18_default_cfg ( &pressure18 ) )
{
log_error( &logger, " Default configuration." );
for ( ; ; );
}
log_info( &logger, " Application Task " );
}

Application Task

Waits for the data ready interrupt and then reads the pressure and temperature data and displays them on the USB UART every 320ms approximately.

void application_task ( void )
{
if ( pressure18_get_int_pin ( &pressure18 ) )
{
float pressure, temperature;
if ( PRESSURE18_OK == pressure18_read_data ( &pressure18, &pressure, &temperature ) )
{
log_printf ( &logger, " Pressure: %.1f mBar\r\n", pressure * PRESSURE18_PA_TO_MBAR );
log_printf ( &logger, " Temperature: %.2f C\r\n\n", temperature );
}
}
}

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.Pressure18

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.


PRESSURE18_OK
@ PRESSURE18_OK
Definition: pressure18.h:363
PRESSURE18_PA_TO_MBAR
#define PRESSURE18_PA_TO_MBAR
Pressure 18 Pascal to mBar conversion value.
Definition: pressure18.h:220
pressure18_cfg_t
Pressure 18 Click configuration object.
Definition: pressure18.h:337
PRESSURE18_MAP_MIKROBUS
#define PRESSURE18_MAP_MIKROBUS(cfg, mikrobus)
MikroBUS pin mapping.
Definition: pressure18.h:257
PRESSURE18_ERROR
@ PRESSURE18_ERROR
Definition: pressure18.h:364
application_task
void application_task(void)
Definition: main.c:66
pressure18_soft_reset
err_t pressure18_soft_reset(pressure18_t *ctx)
Pressure 18 soft reset function.
pressure18_cfg_setup
void pressure18_cfg_setup(pressure18_cfg_t *cfg)
Pressure 18 configuration object setup function.
pressure18_get_int_pin
uint8_t pressure18_get_int_pin(pressure18_t *ctx)
Pressure 18 get int pin function.
pressure18_s
Pressure 18 Click context object.
Definition: pressure18.h:315
pressure18_init
err_t pressure18_init(pressure18_t *ctx, pressure18_cfg_t *cfg)
Pressure 18 initialization function.
pressure18_default_cfg
err_t pressure18_default_cfg(pressure18_t *ctx)
Pressure 18 default configuration function.
application_init
void application_init(void)
Definition: main.c:29
pressure18_read_data
err_t pressure18_read_data(pressure18_t *ctx, float *pressure, float *temperature)
Pressure 18 read data function.