HAPTIC 3 click

Haptic 3 Click is a compact add-on board that uses advanced vibration patterns and waveforms to convey information to a user. This board features the DA7282, a linear resonant actuator (LRA), and an eccentric rotating mass (ERM) haptic driver from Dialog Semiconductor. The DA7282 features LRA or ERM drive capability with automatic closed-loop LRA resonant frequency tracking, guaranteeing consistency across LRA production tolerances. It also offers wideband operation that fully utilizes the capabilities of newer wideband and multi-directional LRAs, alongside three external general-purpose inputs for triggering up to six independent haptic sequences.

click Product page

Click library

• Author : Stefan Filipovic
• Date : Feb 2022.
• Type : I2C type

Software Support

We provide a library for the HAPTIC 3 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 3 Click driver.

Standard key functions :

• haptic3_cfg_setup Config Object Initialization function.

  void haptic3_cfg_setup ( haptic3_cfg_t *cfg );

• haptic3_init Initialization function.

  err_t haptic3_init ( haptic3_t *ctx, haptic3_cfg_t *cfg );

• haptic3_default_cfg Click Default Configuration function.

  err_t haptic3_default_cfg ( haptic3_t *ctx );

Example key functions :

• haptic3_set_vibration_level This function sets the motor vibration level.

  err_t haptic3_set_vibration_level ( haptic3_t *ctx, float level );

• haptic3_get_vibration_level This function reads the motor vibration level.

  err_t haptic3_get_vibration_level ( haptic3_t *ctx, float *level );

• haptic3_write_register This function writes a desired data to the selected register by using I2C serial interface.

  err_t haptic3_write_register ( haptic3_t *ctx, uint8_t reg, uint8_t data_in );

Example Description

This example demonstrates the use of HAPTIC 3 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. */
    haptic3_cfg_t haptic3_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.
    haptic3_cfg_setup( &haptic3_cfg );
    HAPTIC3_MAP_MIKROBUS( haptic3_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == haptic3_init( &haptic3, &haptic3_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    if ( HAPTIC3_ERROR == haptic3_default_cfg ( &haptic3 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

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

Application Task

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

void application_task ( void )
{
    float vibration_level;
    if ( HAPTIC3_OK == haptic3_set_vibration_level ( &haptic3, HAPTIC3_VIBRATION_LEVEL_MAX ) )
    {
        if ( HAPTIC3_OK == haptic3_get_vibration_level ( &haptic3, &vibration_level ) )
        {
            log_printf( &logger, " Vibration level: %.3f \r\n\n", vibration_level );
        }
    }
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

    if ( HAPTIC3_OK == haptic3_set_vibration_level ( &haptic3, HAPTIC3_VIBRATION_LEVEL_MIN ) )
    {
        if ( HAPTIC3_OK == haptic3_get_vibration_level ( &haptic3, &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.HAPTIC3

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.