Library Description

The library initializes and defines the I2C bus driver and drivers that offer a choice for writing data in register and reads data from register. The library includes function for Joystick position. The user also has the function for configuration joystick, reset module and function for read interrupt state.

Key functions:

• uint8_t joystick2_getJoystickPosition() - Functions for get Joystick position
• void joystick2_configuration(uint8_t cfgData) - Functions for configuration joystick
• void joystick2_reset() - Functions for reset module

Examples description

The application is composed of three sections :

• System Initialization - Initializes the I2C module and all the necessary GPIO pins
• Application Initialization - Initializes the driver init, resets the module, and enables all joystick positions
• Application Task - It reads the position of the joystick, if it detects that the joystick has moved from the zero position, it prints a message about the current position

void applicationTask()
{
    uint8_t joystickPos;
    char demoText[ 50 ];
    
    joystickPos = joystick2_getJoystickPosition();

    switch(joystickPos)
    {
        case _JOYSTICK2_BUTTON_ACTIVE:
        {
            mikrobus_logWrite("--- Button is pressed!!! ---", _LOG_LINE );
            Delay_ms( 300 );
            break;
        }
        case _JOYSTICK2_POSITION_RIGHT:
        {
            mikrobus_logWrite("--- Joystick position [RIGHT] ---", _LOG_LINE );
            Delay_ms( 300 );
            break;
        }
        case _JOYSTICK2_POSITION_LEFT:
        {
            mikrobus_logWrite("--- Joystick position [LEFT] ---", _LOG_LINE );
            Delay_ms( 300 );
            break;
        }
        case _JOYSTICK2_POSITION_UP:
        {
            mikrobus_logWrite("--- Joystick position [UP] ---", _LOG_LINE );
            Delay_ms( 300 );
            break;
        }
        case _JOYSTICK2_POSITION_DOWN:
        {
            mikrobus_logWrite("--- Joystick position [DOWN] ---", _LOG_LINE );
            Delay_ms( 300 );
            break;
        }
    }
}

Other mikroE Libraries used in the example:

• I2C Library
• UART Library

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.