Rotary RGB Click

Rotary RGB Click is a compact add-on board for creating visual effects and precise position indications. This board features 16 individual RGB LEDs (WS2812B-2020) from Worldsemi and a high-quality rotary encoder (EC12D1564402) from ALPS. The WS2812B-2020 offers low driving voltage, high brightness, and excellent consistency, while the rotary encoder provides accurate 15-pulse incremental encoding with push-button functionality.

Click Product page

Click library

• Author : Nenad Filipovic
• Date : Jan 2024.
• Type : GPIO type

Software Support

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

Standard key functions :

• rotaryrgb_cfg_setup Config Object Initialization function.

  void rotaryrgb_cfg_setup ( rotaryrgb_cfg_t *cfg );

• rotaryrgb_init Initialization function.

  err_t rotaryrgb_init ( rotaryrgb_t *ctx, rotaryrgb_cfg_t *cfg );

Example key functions :

• rotaryrgb_set_led_pos_color This function sets the desired color for the selected LED position

  err_t rotaryrgb_set_led_pos_color ( rotaryrgb_t *ctx, uint8_t led_pos, uint32_t led_color );

• rotaryrgb_set_all_leds_data This function, using the GPIO protocol, writes the desired array of 16 elements of data to control all LEDs.

  void rotaryrgb_set_all_leds_data ( rotaryrgb_t *ctx, uint32_t *data_in );

• rotaryrgb_get_state_switch This function return rotary encoder switch signal, states of the SW(INT) pin.

  uint8_t rotaryrgb_get_state_switch ( rotaryrgb_t *ctx );

Example Description

This library contains the API for the Rotary RGB Click driver to control LEDs states and a rotary encoder position readings.

The demo application is composed of two sections :

Application Init

Initialization of GPIO module and log UART. After the driver init, the app turn off all LEDs.

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    rotaryrgb_cfg_t rotaryrgb_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.
    rotaryrgb_cfg_setup( &rotaryrgb_cfg, &rotaryrgb_logic_zero, &rotaryrgb_logic_one );
    ROTARYRGB_MAP_MIKROBUS( rotaryrgb_cfg, MIKROBUS_1 );
    if ( DIGITAL_OUT_UNSUPPORTED_PIN == rotaryrgb_init( &rotaryrgb, &rotaryrgb_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    rotaryrgb_set_all_led_color( &rotaryrgb, ROTARYRGB_COLOR_OFF );
    Delay_ms ( 100 );

    log_info( &logger, " Application Task " );
    Delay_ms ( 100 );
}

Application Task

This example demonstrates the use of the Rotary RGB Click board. The demo example shows the functionality of a rotary encoder used to control RGB LEDs. The switch controls the application of the colors, and the encoder mechanism controls the state of the LEDs.

void application_task ( void ) 
{
    rotaryrgb_set_led_pos_color( &rotaryrgb, led_pos % 17, demo_color_table[ led_color_sel ] );
    rotaryrgb_switch_detection( );
    rotaryrgb_encoder_mechanism( );
}

Note

Make sure the logic delays are defined for your system in the rotaryrgb_delays.h file.

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.RotaryRGB

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.