Rotary Switch Click

Rotary Switch Click is a compact add-on board for applications requiring precise rotary input. This board is based on the RDS6-16S-1065-1-SMT, a 16-position notched cap surface-mount rotary DIP switch from Same Sky. This switch features continuous 360-degree actuator rotation, a 2.54mm pin pitch, and robust construction with a contact resistance of 80mΩ and a maximum operating torque of 700gf*cm, ensuring reliable operation for up to 10,000 steps. The board supports the innovative Click Snap feature, allowing the rotary switch to operate autonomously when detached, providing flexibility in various implementations.

Click Product page

Click library

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

Software Support

We provide a library for the Rotary Switch 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 Rotary Switch Click driver.

Standard key functions :

• rotaryswitch_cfg_setup Config Object Initialization function.

  void rotaryswitch_cfg_setup ( rotaryswitch_cfg_t *cfg );

• rotaryswitch_init Initialization function.

  err_t rotaryswitch_init ( rotaryswitch_t *ctx, rotaryswitch_cfg_t *cfg );

• rotaryswitch_default_cfg Click Default Configuration function.

  err_t rotaryswitch_default_cfg ( rotaryswitch_t *ctx );

Example key functions :

• rotaryswitch_get_position This function reads the rotary switch position.

  err_t rotaryswitch_get_position ( rotaryswitch_t *ctx, uint8_t *position );

• rotaryswitch_write_reg This function writes a desired data to the selected register by using I2C serial interface.

  err_t rotaryswitch_write_reg ( rotaryswitch_t *ctx, uint8_t reg, uint8_t data_in );

• rotaryswitch_read_reg This function reads data from the selected register by using I2C serial interface.

  err_t rotaryswitch_read_reg ( rotaryswitch_t *ctx, uint8_t reg, uint8_t *data_out );

Example Description

This example demonstrates the use of Rotary Switch Click board by reading and displaying the switch position on the USB UART.

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. */
    rotaryswitch_cfg_t rotaryswitch_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.
    rotaryswitch_cfg_setup( &rotaryswitch_cfg );
    ROTARYSWITCH_MAP_MIKROBUS( rotaryswitch_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == rotaryswitch_init( &rotaryswitch, &rotaryswitch_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    if ( ROTARYSWITCH_ERROR == rotaryswitch_default_cfg ( &rotaryswitch ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

    log_info( &logger, " Application Task " );
}

Application Task

Reads the switch position every 20ms and displays it on the USB UART on position change.

void application_task ( void )
{
    static uint8_t old_position = 0xFF;
    uint8_t position = 0;
    if ( ( ROTARYSWITCH_OK == rotaryswitch_get_position ( &rotaryswitch, &position ) ) && 
         ( position != old_position ) )
    {
        Delay_ms ( 20 );
        // Double-check for debouncing
        if ( ( ROTARYSWITCH_OK == rotaryswitch_get_position ( &rotaryswitch, &position ) ) && 
             ( position != old_position ) )
        {
            old_position = position;
            log_printf ( &logger, " Switch position: %.1X\r\n", ( uint16_t ) position );
        }
    }
    Delay_ms ( 20 );
}

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.RotarySwitch

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.