Library Description

The library initializes and defines the I2C bus driver and drivers that offer a choice for sending a command and read data from register. The library includes function for read Temperature data and Pressure data, function for read calibration data from PROM and function for start measurement. The user also has the function for reset device and function for set OSR(Over sampling ratio) for Pressure and Temperature measurement data.

Key functions:

• uint8_t pressure7_readPROM() - Functions for read calibration data from PROM
• void pressure7_startMeasurement() - Functions for start measurement and calculation data
• void pressure7_getSensorData(float *Temperature, float *Pressure) - Functions for read Pressure and Temperature data

Examples description

The application is composed of the three sections :

• System Initialization - Initializes I2C module.
• Application Initialization - Initialization driver init, device reset, set OSR for measurement Pressure(D1) and Temperature(D2) data and read calibration data from PROM.
• Application Task - (code snippet) - Start measurement and reads Temperature data and Pressure data and logs data to USBUART every 500ms.

void applicationTask()
{
    pressure7_startMeasurement();
    pressure7_getSensorData(&Temperature, &Pressure);

    FloatToStr(Temperature, demoText);
    demoText[6] = 0;
    mikrobus_logWrite(" Temperature : ", _LOG_TEXT);
    mikrobus_logWrite(demoText, _LOG_TEXT);
    mikrobus_logWrite(" C ", _LOG_LINE);

    FloatToStr(Pressure, demoText);
    demoText[7] = 0;
    mikrobus_logWrite(" Pressure : ", _LOG_TEXT);
    mikrobus_logWrite(demoText, _LOG_TEXT);
    mikrobus_logWrite(" mBar ", _LOG_LINE);
    
    mikrobus_logWrite("  ", _LOG_LINE);
    Delay_ms( 1000 );
    }
}

Other mikroE Libraries used in the example:

• I2C

Additional notes and information

Depending on the development board you are using, you may need USB UART click, USB UART 2 clickor 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.