LED Ring 2 Click

LED Ring 2 Click is a compact add-on board that provides a circular-shaped electronic lighting solution. This board features three I2C-configurable high-performance LED matrix drivers, the LP5862 from Texas Instruments. The LP5862 integrates 18 constant current sinks for driving 18 yellow LEDs. With the help of two additional LP5862 drivers, it is possible to realize, as shown on this board, a solution of 54 yellow LEDs arranged in a circular pattern. In addition, it also provides excellent PWM dimming effects.

Click Product page

Click library

• Author : Nenad Filipovic
• Date : Mar 2023.
• Type : I2C type

Software Support

We provide a library for the LED Ring 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 LED Ring 2 Click driver.

Standard key functions :

• ledring2_cfg_setup Config Object Initialization function.

  void ledring2_cfg_setup ( ledring2_cfg_t *cfg );

• ledring2_init Initialization function.

  err_t ledring2_init ( ledring2_t *ctx, ledring2_cfg_t *cfg );

• ledring2_default_cfg Click Default Configuration function.

  err_t ledring2_default_cfg ( ledring2_t *ctx );

Example key functions :

• ledring2_set_led_brightness LED Ring 2 set LED brightness function.

  err_t ledring2_set_led_brightness ( ledring2_t *ctx, uint8_t led_pos, uint16_t led_brightness );

• ledring2_set_led_pos_state LED Ring 2 set LED state function.

  err_t ledring2_set_led_pos_state ( ledring2_t *ctx, uint8_t led_pos, ledring2_led_state_t led_state );

• ledring2_enable LED Ring 2 enable function.

  err_t ledring2_enable ( ledring2_t *ctx );

Example Description

This library contains API for LED Ring 2 Click driver. The library initializes and defines the I2C bus drivers to write and read data from registers. The library also includes a function for controlling LEDs.

The demo application is composed of two sections :

Application Init

The initialization of I2C module, log UART, and additional pins. After the driver init, the app executes a default configuration.

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    ledring2_cfg_t ledring2_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.
    ledring2_cfg_setup( &ledring2_cfg );
    LEDRING2_MAP_MIKROBUS( ledring2_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == ledring2_init( &ledring2, &ledring2_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    Delay_ms ( 100 );

    if ( LEDRING2_ERROR == ledring2_default_cfg ( &ledring2 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }
    Delay_ms ( 100 );
    log_info( &logger, " Application Task " );
    log_printf( &logger, " LED Ring 2 Click\r\n" );
}

Application Task

This example demonstrates the use of the LED Ring 2 Click board™. The demo example controls every LED and changes the LED brightness by PWM, increasing its brightness from LED1 to LED54.

void application_task ( void ) 
{
    for ( uint8_t led_pos = 1; led_pos < 55; led_pos++ )
    {
        if ( LEDRING2_OK == ledring2_set_led_brightness( &ledring2, led_pos, ( led_pos * 100 ) + 255 ) )
        {
            ledring2_set_vsync( &ledring2 );
            Delay_ms ( 10 );
        }
    }
    Delay_ms ( 1000 );

    for ( uint8_t led_pos = 54; led_pos > 0; led_pos-- )
    {
        if ( LEDRING2_OK == ledring2_set_led_brightness( &ledring2, led_pos, 0 ) )
        {
            ledring2_set_vsync( &ledring2 );
            Delay_ms ( 10 );
        }
    }
    Delay_ms ( 1000 );
}

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.LEDRing2

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.