Barometer 7 click

Barometer 7 Click is a compact add-on board used to measure air pressure in a specific environment. This board features the KP264XTMA1, a high-accuracy digital barometric air pressure sensor based on a capacitive principle from Infineon Technologies. The KP264XTMA1 is surface micromachined with a monolithic integrated signal conditioning circuit implemented in BiCMOS technology that converts pressure into a 10-bit digital value and sends the information via the SPI interface. It measures pressure from 40kPa up to 115kPa with an accuracy of ±1.5kPa over a wide operating temperature range.

click Product page

Click library

• Author : Nenad Filipovic
• Date : Dec 2021.
• Type : SPI type

Software Support

We provide a library for the Barometer 7 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 7 Click driver.

Standard key functions :

• barometer7_cfg_setup Config Object Initialization function.

  void barometer7_cfg_setup ( barometer7_cfg_t *cfg );

• barometer7_init Initialization function.

  err_t barometer7_init ( barometer7_t *ctx, barometer7_cfg_t *cfg );

• barometer7_default_cfg Click Default Configuration function.

  err_t barometer7_default_cfg ( barometer7_t *ctx );

Example key functions :

• barometer7_get_pressure Barometer 7 get pressure function.

  err_t barometer7_get_pressure ( barometer7_t *ctx, float *pressure );

• barometer7_get_temperature Barometer 7 get temperature function.

  err_t barometer7_get_temperature ( barometer7_t *ctx, float *temperature );

Example Description

This library contains API for Barometer 7 Click driver. The demo application reads and calculate temperature and pressure data.

The demo application is composed of two sections :

Application Init

Initializes SPI driver and log UART. After driver initialization the app set default settings and display sensor identifier data.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    barometer7_cfg_t barometer7_cfg;  /**< Click config object. */

    /** 
     * Logger initialization.
     * Default baud rate: 115200
     * Default log level: LOG_LEVEL_DEBUG
     * @note If USB_UART_RX and USB_UART_TX 
     * are defined as HAL_PIN_NC, you will 
     * need to define them manually for log to work. 
     * See @b LOG_MAP_USB_UART macro definition for detailed explanation.
     */
    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, " Application Init " );

    // Click initialization.
    barometer7_cfg_setup( &barometer7_cfg );
    BAROMETER7_MAP_MIKROBUS( barometer7_cfg, MIKROBUS_1 );
    if ( SPI_MASTER_ERROR == barometer7_init( &barometer7, &barometer7_cfg ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    BAROMETER7_SET_DATA_SAMPLE_EDGE;

    if ( BAROMETER7_ERROR == barometer7_default_cfg ( &barometer7 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

    log_info( &logger, " Application Task " );
    Delay_ms ( 100 );;

    static barometer7_identifier_t id_data;
    barometer7_get_identifier ( &barometer7, &id_data );
    log_printf( &logger, "--------------------------\r\n" );
    log_printf( &logger, " > Supplier         : %d <\r\n", ( uint16_t ) id_data.supplier );
    log_printf( &logger, " > Silicon Version  : %d <\r\n", ( uint16_t ) id_data.silicon_version );
    log_printf( &logger, " > Metal Version    : %d <\r\n", ( uint16_t ) id_data.metal_version );
    log_printf( &logger, " > ASCI Name        : %c <\r\n", id_data.asic_name );
    log_printf( &logger, "--------------------------\r\n" );
    Delay_ms ( 1000 );
}

Application Task

This is an example that demonstrates the use of the Barometer 7 Click board™. In this example, display the Pressure ( mBar ) and Temperature ( degree Celsius ) data. Results are being sent to the Usart Terminal where you can track their changes.

void application_task ( void )
{
    static float pressure; 
    static float temperature;

    barometer7_get_pressure( &barometer7, &pressure );
    if ( BAROMETER7_NO_ERROR != barometer7.diagnosis )
    {
        display_error( );
    }
    log_printf( &logger, " Pressure     : %.0f mbar\r\n", pressure );

    barometer7_get_temperature( &barometer7, &temperature );
    if ( BAROMETER7_NO_ERROR != barometer7.diagnosis )
    {
        display_error( );   
    }
    log_printf( &logger, " Temperature  : %.2f C\r\n", temperature );
    log_printf( &logger, "--------------------------\r\n" );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
}

Additional Function

• display_error This function displays diagnosis error messages.

  static void display_error ( void );

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.Barometer7

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.