Haptic 4 click

Haptic 4 Click is a compact add-on board that enables precise haptic feedback in various electronic projects. This board features the DA7280, a haptic driver designed to drive linear resonant actuator (LRA) and eccentric rotating mass (ERM) actuators from Renesas. The DA7280 boasts a differential output drive and continuous motion sensing for calibration-free operation, coupled with wide-band support to leverage the capabilities of modern LRAs. It supports six independent haptic sequences activated directly via mikroBUS™ pins or externally through I2C or PWM signals, offering extensive flexibility for haptic configuration. Ideal for enhancing user experience in wearables, electronic peripherals, automotive interfaces, industrial controls, and AR/VR controllers, this Click board™ opens new possibilities for interactive and tactile-responsive technology.

click Product page

Click library

• Author : Stefan Ilic
• Date : Dec 2023.
• Type : I2C type

Software Support

We provide a library for the Haptic 4 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 Haptic 4 Click driver.

Standard key functions :

• haptic4_cfg_setup Config Object Initialization function.

  void haptic4_cfg_setup ( haptic4_cfg_t *cfg );

• haptic4_init Initialization function.

  err_t haptic4_init ( haptic4_t *ctx, haptic4_cfg_t *cfg );

• haptic4_default_cfg Click Default Configuration function.

  err_t haptic4_default_cfg ( haptic4_t *ctx );

Example key functions :

• haptic4_check_communication This function checks the communication by reading and verifying the chip ID.

  err_t haptic4_check_communication ( haptic4_t *ctx );

• haptic4_set_vibration_level This function sets the motor vibration level.

  err_t haptic4_set_vibration_level ( haptic4_t *ctx, float level );

• haptic4_get_vibration_level This function reads the motor vibration level.

  err_t haptic4_get_vibration_level ( haptic4_t *ctx, float *level );

Example Description

This example demonstrates the use of Haptic 4 click board by controlling the attached motor vibration level.

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. */
    haptic4_cfg_t haptic4_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.
    haptic4_cfg_setup( &haptic4_cfg );
    HAPTIC4_MAP_MIKROBUS( haptic4_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == haptic4_init( &haptic4, &haptic4_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    if ( HAPTIC4_ERROR == haptic4_default_cfg ( &haptic4 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

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

Application Task

Changes the motor vibration level every 2 seconds between MAX and MIN, and displays the currently set level on the USB UART.

void application_task ( void ) 
{
    float vibration_level;
    if ( HAPTIC4_OK == haptic4_set_vibration_level ( &haptic4, HAPTIC4_VIBRATION_LEVEL_MAX ) )
    {
        if ( HAPTIC4_OK == haptic4_get_vibration_level ( &haptic4, &vibration_level ) )
        {
            log_printf( &logger, " Vibration level: %.3f \r\n\n", vibration_level );
        }
    }
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

    if ( HAPTIC4_OK == haptic4_set_vibration_level ( &haptic4, HAPTIC4_VIBRATION_LEVEL_MIN ) )
    {
        if ( HAPTIC4_OK == haptic4_get_vibration_level ( &haptic4, &vibration_level ) )
        {
            log_printf( &logger, " Vibration level: %.3f \r\n\n", vibration_level );
        }
    }
    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.Haptic4

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.