LED Driver 12 Click

LED Driver 12 Click is a compact add-on board that simplifies the control of multiple LEDs. This board features the PCA9532, a 16-bit I2C-configurable I/O expander optimized for dimming LEDs in 256 discrete Red/Green/Blue (RGB) steps from NXP Semiconductors. The PCA9532 offers high efficiency, supporting up to 16 LED channels and delivering a maximum of up to 25mA of LED current per channel. It contains an internal oscillator with two user-programmable blink rates and duty cycles coupled to the output PWM. Any bits not used for controlling the LEDs can be used for GPIO expansion, which provides a simple solution when additional I/O is needed for some sensors, push-buttons, or alarm monitoring. This Click board™ is suitable for color mixing and backlight application for amusement products, LED status signalization, home automation projects, and many more.

Click Product page

Click library

• Author : Stefan Filipovic
• Date : Dec 2021.
• Type : I2C type

Software Support

We provide a library for the LED Driver 12 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 Driver 12 Click driver.

Standard key functions :

• leddriver12_cfg_setup Config Object Initialization function.

  void leddriver12_cfg_setup ( leddriver12_cfg_t *cfg );

• leddriver12_init Initialization function.

  err_t leddriver12_init ( leddriver12_t *ctx, leddriver12_cfg_t *cfg );

• leddriver12_default_cfg Click Default Configuration function.

  err_t leddriver12_default_cfg ( leddriver12_t *ctx );

Example key functions :

• leddriver12_set_led_config This function sets the specified LED config.

  err_t leddriver12_set_led_config ( leddriver12_t *ctx, uint8_t led_number, uint8_t led_cfg );

• leddriver12_set_led_port_config This function sets the specified LED port config.

  err_t leddriver12_set_led_port_config ( leddriver12_t *ctx, uint8_t led_port_number, uint8_t led_cfg );

• leddriver12_set_blink_period_pwm_0 This function sets the blink period of PWM 0 function.

  err_t leddriver12_set_blink_period_pwm_0 ( leddriver12_t *ctx, float blink_period );

Example Description

This example demonstrates the use of LED Driver 12 Click board.

The demo application is composed of two sections :

Application Init

Initializes the driver and performs the Click default configuration which turns OFF the LEDs 0 to 7, configures LEDs 8 to 11 for PWM0, and LEDs 12 to 15 for PWM1 settings. PWM0 is set at half duty cycle with a one-second blinking period, while PWM1 is configured for a quarter of duty cycle with a half-second blinking period.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    leddriver12_cfg_t leddriver12_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.
    leddriver12_cfg_setup( &leddriver12_cfg );
    LEDDRIVER12_MAP_MIKROBUS( leddriver12_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == leddriver12_init( &leddriver12, &leddriver12_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    if ( LEDDRIVER12_ERROR == leddriver12_default_cfg ( &leddriver12 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

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

Application Task

Toggles the LEDs 0-7 every 2 seconds and displays their state on the USB UART.

void application_task ( void )
{
    leddriver12_set_led_port_config ( &leddriver12, LEDDRIVER12_LED0_TO_3, LEDDRIVER12_LED_ON );
    leddriver12_set_led_port_config ( &leddriver12, LEDDRIVER12_LED4_TO_7, LEDDRIVER12_LED_ON );
    log_printf ( &logger, " LEDs 0-7 turns ON \r\n" );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    leddriver12_set_led_port_config ( &leddriver12, LEDDRIVER12_LED0_TO_3, LEDDRIVER12_LED_OFF );
    leddriver12_set_led_port_config ( &leddriver12, LEDDRIVER12_LED4_TO_7, LEDDRIVER12_LED_OFF );
    log_printf ( &logger, " LEDs 0-7 turns OFF \r\n\n" );
    Delay_ms ( 1000 );
    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.LEDDriver12

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.