Library Description

The library covers all the necessary functions to control Barometer 3 click board. Library performs a standard SPI or I2C interface communication.

Key functions:

• void barometer3_def_cfg ( void ) - Apply Default Configuration function.
• uint8_t barometer3_meas_temp_once ( float *result, uint8_t temp_osr ) - Get Temperature Measurement Once function.
• uint8_t barometer3_meas_prs_once ( float *result, uint8_t prs_osr ) - Get Pressure Measurement Once function.

Examples description

The application is composed of three sections :

• System Initialization - Initilization I2C module and sets INT pin as INPUT.
• Application Initialization - Initializes driver init and configuration module for measurement.
• Application Task - (code snippet) Reads Pressure data in Pascal [ Pa ]. Results are being sent to the Usart Terminal where you can track their changes. All data logs write on USB uart changes for every 1 sec.

void application_task( )
{
    status_val = barometer3_meas_prs_once( &pressure, BAROMETER3_PM_PRC_128 );

    if ( status_val == BAROMETER3_SUCCESS )
    {
        mikrobus_logWrite( " Pressure: ", _LOG_TEXT );
        FloatToStr( pressure, log_txt );
        mikrobus_logWrite( log_txt, _LOG_TEXT );
        mikrobus_logWrite( " Pa", _LOG_LINE );
        mikrobus_logWrite( "-----------------------", _LOG_LINE );
        Delay_ms( 1000 );
    }
}

Other mikroE Libraries used in the example:

• SPI or I2C
• UART
• Conversions

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.