Joystick 4 Click

Joystick 4 Click is a compact add-on board that provides precise and reliable input control for various interactive projects. This board features the 2434804-1, a 5-position tactile switch from the ALCOSWITCH series by TE Connectivity. The switch features an extended top actuator for precise input detection, a stainless steel contact base, and silver contact plating, ensuring durability and corrosion resistance with a lifespan of 100,000 cycles. With a low-profile design, it handles a contact current rating of 50mA.

Click Product page

Click library

• Author : Stefan Filipovic
• Date : Jun 2024.
• Type : I2C type

Software Support

We provide a library for the Joystick 4 Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.

Package can be downloaded/installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for Joystick 4 Click driver.

Standard key functions :

• joystick4_cfg_setup Config Object Initialization function.

  void joystick4_cfg_setup ( joystick4_cfg_t *cfg );

• joystick4_init Initialization function.

  err_t joystick4_init ( joystick4_t *ctx, joystick4_cfg_t *cfg );

• joystick4_default_cfg Click Default Configuration function.

  err_t joystick4_default_cfg ( joystick4_t *ctx );

Example key functions :

• joystick4_get_int_pin This function returns the INT pin logic state.

  uint8_t joystick4_get_int_pin ( joystick4_t *ctx );

• joystick4_get_pins This function reads all input pins logic state.

  err_t joystick4_get_pins ( joystick4_t *ctx, uint8_t *pin_mask );

• joystick4_get_position This function returns the joystick position flag extracted from the input pins state mask.

  uint8_t joystick4_get_position ( uint8_t pin_mask );

Example Description

This example demonstrates the use of the Joystick 4 Click board by reading and displaying the joystick position.

The demo application is composed of two sections :

Application Init

Initializes the driver and performs the Click default configuration.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    joystick4_cfg_t joystick4_cfg;  /**< Click config object. */

    /** 
     * Logger initialization.
     * Default baud rate: 115200
     * Default log level: LOG_LEVEL_DEBUG
     * @note If USB_UART_RX and USB_UART_TX 
     * are defined as HAL_PIN_NC, you will 
     * need to define them manually for log to work. 
     * See @b LOG_MAP_USB_UART macro definition for detailed explanation.
     */
    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, " Application Init " );

    // Click initialization.
    joystick4_cfg_setup( &joystick4_cfg );
    JOYSTICK4_MAP_MIKROBUS( joystick4_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == joystick4_init( &joystick4, &joystick4_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    if ( JOYSTICK4_ERROR == joystick4_default_cfg ( &joystick4 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

    log_info( &logger, " Application Task " );

    if ( JOYSTICK4_PIN_STATE_HIGH == joystick4_get_int_pin ( &joystick4 ) )
    {
        log_printf ( &logger, " Joystick position: IDLE\r\n\n" );
    }
}

Application Task

Waits for the input change interrupt, reads the input pins mask, extracts the joystick position from those readings, and displays it on the USB UART.

void application_task ( void )
{
    uint8_t pin_mask = 0;
    if ( JOYSTICK4_PIN_STATE_LOW == joystick4_get_int_pin ( &joystick4 ) )
    {
        if ( JOYSTICK4_OK == joystick4_get_pins ( &joystick4, &pin_mask ) )
        {
            log_printf ( &logger, " Joystick position: " );
            switch ( joystick4_get_position ( pin_mask ) )
            {
                case JOYSTICK4_POSITION_IDLE:
                {
                    log_printf ( &logger, "IDLE" );
                    break;
                }
                case JOYSTICK4_POSITION_CENTER:
                {
                    log_printf ( &logger, "CENTER" );
                    break;
                }
                case JOYSTICK4_POSITION_CENTER_UP:
                {
                    log_printf ( &logger, "CENTER-UP" );
                    break;
                }
                case JOYSTICK4_POSITION_CENTER_RIGHT:
                {
                    log_printf ( &logger, "CENTER-RIGHT" );
                    break;
                }
                case JOYSTICK4_POSITION_CENTER_DOWN:
                {
                    log_printf ( &logger, "CENTER-DOWN" );
                    break;
                }
                case JOYSTICK4_POSITION_CENTER_LEFT:
                {
                    log_printf ( &logger, "CENTER-LEFT" );
                    break;
                }
                case JOYSTICK4_POSITION_UP:
                {
                    log_printf ( &logger, "UP" );
                    break;
                }
                case JOYSTICK4_POSITION_UPPER_RIGHT:
                {
                    log_printf ( &logger, "UPPER-RIGHT" );
                    break;
                }
                case JOYSTICK4_POSITION_RIGHT:
                {
                    log_printf ( &logger, "RIGHT" );
                    break;
                }
                case JOYSTICK4_POSITION_LOWER_RIGHT:
                {
                    log_printf ( &logger, "LOWER-RIGHT" );
                    break;
                }
                case JOYSTICK4_POSITION_DOWN:
                {
                    log_printf ( &logger, "DOWN" );
                    break;
                }
                case JOYSTICK4_POSITION_LOWER_LEFT:
                {
                    log_printf ( &logger, "LOWER-LEFT" );
                    break;
                }
                case JOYSTICK4_POSITION_LEFT:
                {
                    log_printf ( &logger, "LEFT" );
                    break;
                }
                case JOYSTICK4_POSITION_UPPER_LEFT:
                {
                    log_printf ( &logger, "UPPER-LEFT" );
                    break;
                }
                default:
                {
                    log_printf ( &logger, "UNKNOWN" );
                    break;
                }
            }
            log_printf ( &logger, "\r\n\n" );
        }
    }
}

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.Joystick4

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. UART terminal is available in all MikroElektronika compilers.