Library Description

The library initializes and defines the I2C or SPI bus driver and drivers that offer a choice for writing data in register and reads data form register. The library includes function for read Pressure data in mBar and Temperature data in C. The user also has the function for update all calibration coefficients, function for configuration register and functions for get Pressure and Temperature raw data.

Key functions:

• float pressure9_getTemperatureData() - Temperature data.
• float pressure9_getPressureData() - Pressure data.
• void pressure9_updateCalculationCoefficient() - Update all calibration coefficients.

Examples description

The application is composed of the three sections :

• System Initialization - Initializes I2C or SPI module and sets CS pin as OUTPUT for select comunication.
• Application Initialization - Initialization driver init, test comunication, software reset, configuration module for measurement and calls the function to update calibration coefficients - this function must be called before the measurement starts.
• Application Task - Reads Temperature data in [C] and Pressure data in [mBar] and this data logs to the USBUART every 1 sec.

void applicationTask()
{
    float Temperature;
    float Pressure;
    char demoText[ 50 ] = {0};
    
    Pressure = pressure9_getPressureData();
    FloatToStr(Pressure, demoText);
    mikrobus_logWrite(" -- Pressure : ", _LOG_TEXT);
    mikrobus_logWrite(demoText, _LOG_LINE);
    
    Temperature = pressure9_getTemperatureData();
    FloatToStr(Temperature, demoText);
    mikrobus_logWrite(" -- Temperature : ", _LOG_TEXT);
    mikrobus_logWrite(demoText, _LOG_LINE);
    
    mikrobus_logWrite("-----------------------------", _LOG_LINE);
    Delay_ms( 500 );

}

Other mikroE Libraries used in the example:

• I2C
• SPI
• 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.