Barometer 3 Click

Barometer 3 Click is a compact add-on board for applications which require digital barometric air pressure measurement. This board features the DPS368, a digital barometric air pressure sensor from Infineon.

Click Product page

Click library

• Author : MikroE Team
• Date : Jul 2020.
• Type : I2C/SPI type

Software Support

We provide a library for the Barometer3 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 form compilers IDE(recommended way), or downloaded from our LibStock, or found on mikroE github account.

Library Description

This library contains API for Barometer3 Click driver.

Standard key functions :

• Config Object Initialization function.

  void barometer3_cfg_setup ( barometer3_cfg_t *cfg );

• Initialization function.

  BAROMETER3_RETVAL barometer3_init ( barometer3_t ctx, barometer3_cfg_t cfg );

• Click Default Configuration function.

  void barometer3_def_cfg ( barometer3_t *ctx );

Example key functions :

• Temperature Measurement Configuration function.

  void barometer3_cfg_temp ( barometer3_t *ctx, uint8_t temp_mr, uint8_t temp_osr );

• Get Temperature Measurement Once function.

  uint8_t barometer3_meas_temp_once ( barometer3_t ctx, float result, uint8_t temp_osr );

• Get Pressure Measurement Once function.

  uint8_t barometer3_meas_prs_once ( barometer3_t ctx, float result, uint8_t prs_osr );

Examples Description

This example demonstrates the use of Barometer 3 Click board.

The demo application is composed of two sections :

Application Init

Initializes the driver, sets the Click board default configuration and check the communication by reading the device ID.

void application_init ( void )
{
    log_cfg_t log_cfg;
    barometer3_cfg_t cfg;
    uint8_t status_val;

    /** 
     * 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.

    barometer3_cfg_setup( &cfg );
    BAROMETER3_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    barometer3_init( &barometer3, &cfg );

    barometer3_def_cfg( &barometer3 );
    Delay_ms ( 100 );

    barometer3_generic_read( &barometer3, BAROMETER3_PROD_ID, &status_val, 1 );

    if ( status_val != BAROMETER3_PRODUCT_ID )
    {

        log_printf( &logger, " ERROR - wrong ID\r\n" );
        log_printf( &logger, " Please restart your system.\r\n" );
        for ( ; ; );
    }
    log_info( &logger, "---- Application Task ----" );
}

Application Task

Reads the temperature [ Celsius ] and pressure [ mBar ] and displays the results on the USB UART.

void application_task ( void )
{
    barometer3_cfg_temp( &barometer3, BAROMETER3_TMP_RATE_1, BAROMETER3_TMP_PRC_128 );
    barometer3_standby( &barometer3 );
    while ( BAROMETER3_SUCCESS != barometer3_meas_temp_once( &barometer3, &temperature, BAROMETER3_TMP_PRC_128 ) );
    log_printf( &logger, " Temperature: %.2f Celsius \r\n", temperature );

    barometer3_cfg_pres( &barometer3, BAROMETER3_PM_RATE_1, BAROMETER3_PM_PRC_128 );
    barometer3_standby( &barometer3 );
    while ( BAROMETER3_SUCCESS != barometer3_meas_prs_once( &barometer3, &pressure, BAROMETER3_PM_PRC_128 ) );
    log_printf( &logger, " Pressure: %.2f mBar \r\n", pressure );
    log_printf( &logger, "----------------------- \r\n" );
} 

The full application code, and ready to use projects can be installed directly form compilers IDE(recommneded) or found on LibStock page or mikroE GitHub accaunt.

Other mikroE Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.Barometer3

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. The terminal available in all Mikroelektronika compilers, or any other terminal application of your choice, can be used to read the message.