Library Description

The library initializes and defines the I2C bus driver and drivers that offer a choice for writing data in register. The library includes function for read X/Y/Z axis data and function for Tap detection interrupt. The user also has the function for configuration register and function for read interrupt state.

Key functions:

• void accel12_getAxisData(int16_t *x_axis, int16_t *y_axis, int16_t *z_axis) - Accel axis data.
• uint8_t accel12_getTapDetection() - Tap detection.
• void accel12_configuration(uint8_t reg, uint8_t dataIn) - Functions for configuration register.

Examples description

The application is composed of three sections :

• System Initialization - Initializes I2C module and sets INT pin as INPUT.
• Application Initialization - Initialization driver init and configuration Accel measuremen and Tap detection interrupt.
• Application Task - Reads the acceleration data in 3 axis and detects the tap on the axes. All data logs on the USBUART every 1.5sec.

void applicationTask()
{
    /* Accelerometer measurement */
    accel12_getAxisData(&X_Axis, &Y_Axis, &Z_Axis);

    IntToStr(X_axis, demoText);
    mikrobus_logWrite(" X axis : ", _LOG_TEXT);
    mikrobus_logWrite(demoText, _LOG_LINE);

    IntToStr(Y_axis, demoText);
    mikrobus_logWrite(" Y axis : ", _LOG_TEXT);
    mikrobus_logWrite(demoText, _LOG_LINE);

    IntToStr(Z_axis, demoText);
    mikrobus_logWrite(" Z axis : ", _LOG_TEXT);
    mikrobus_logWrite(demoText, _LOG_LINE);
    
    /* TAP interrupt */
    tap = accel12_getTapDetection();
    switch(tap)
    {
        case 1:
        {
            mikrobus_logWrite(" X Positive ", _LOG_LINE);
            break;
        }
        case 2:
        {
            mikrobus_logWrite(" Y Positive ", _LOG_LINE);
            break;
        }
        case 3:
        {
            mikrobus_logWrite(" Z Positive ", _LOG_LINE);
            break;
        }
        case 4:
        {
            mikrobus_logWrite(" X Negative ", _LOG_LINE);
            break;
        }
        case 5:
        {
            mikrobus_logWrite(" Y Negative ", _LOG_LINE);
            break;
        }
        case 6:
        {
            mikrobus_logWrite(" Z Negative ", _LOG_LINE);
            break;
        }
    }
    mikrobus_logWrite("---------------------", _LOG_LINE);
    Delay_ms( 1500 );
}

Other mikroE Libraries used in the example:

• I2C

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.