rotaryr2

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Rotary R 2 Click

Rotary R 2 Click is a compact add-on board that allows you to add a precision input knob to your design. This board features the TLC5925, a low-power 16-channel constant-current LED sink driver from Texas Instruments that, combined with a high-quality rotary encoder from ALPS, the EC12D1564402, allows you to add a precision input knob to your design. It also features an LED ring composed of 16 individual red LEDs that can visually represent the encoder position and more.

Click Product page

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Click library

• Author : Nenad Filipovic
• Date : Nov 2023.
• Type : SPI type

Software Support

We provide a library for the Rotary R 2 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 R 2 Click driver.

Standard key functions :

• rotaryr2_cfg_setup Config Object Initialization function.

void rotaryr2_cfg_setup ( rotaryr2_cfg_t *cfg );

• rotaryr2_init Initialization function.

err_t rotaryr2_init ( rotaryr2_t *ctx, rotaryr2_cfg_t *cfg );

• rotaryr2_default_cfg Click Default Configuration function.

err_t rotaryr2_default_cfg ( rotaryr2_t *ctx );

Example key functions :

• rotaryr2_set_led_pos This function turns on the LED for the selected LED position.

err_t rotaryr2_set_led_pos ( rotaryr2_t *ctx, uint8_t led_pos );

• rotaryr2_set_led_data This function, using SPI serial interface, writes a desired 16-bit data.

err_t rotaryr2_set_led_data ( rotaryr2_t *ctx, uint16_t data_in );

• rotaryr2_get_state_switch This function return rotary encoder switch signal, states of the SW(INT).

uint8_t rotaryr2_get_state_switch ( rotaryr2_t *ctx );

Example Description

This library contains the API for the Rotary R 2 Click driver to control LEDs states and a rotary encoder position readings.

The demo application is composed of two sections :

Application Init

Initialization of SPI module and log UART. After the driver init, the app executes a default configuration and turn off all LEDs.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    rotaryr2_cfg_t rotaryr2_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.
    rotaryr2_cfg_setup( &rotaryr2_cfg );
    ROTARYR2_MAP_MIKROBUS( rotaryr2_cfg, MIKROBUS_1 );
    if ( SPI_MASTER_ERROR == rotaryr2_init( &rotaryr2, &rotaryr2_cfg ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    if ( ROTARYR2_ERROR == rotaryr2_default_cfg ( &rotaryr2 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }
    
    log_info( &logger, " Application Task " );
}

Application Task

This example demonstrates the use of the Rotary R 2 Click board™. The demo example shows the functionality of a rotary encoder used to control LEDs.

void application_task ( void )
{
    if ( ROTARYR2_OK == rotaryr2_set_led_data( &rotaryr2, led_data ) )
    {
        rotaryr2_switch_detection( );
        rotaryr2_encoder_mechanism( );
    }
}

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.RotaryR2

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.

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