ProxFusion 3 Click

ProxFusion 3 Click is a compact add-on board that represents a multifunctional touch sensing Click board™. This board features the IQS2692A, an 8-channel ProxFusion® capacitive touch and proximity controller with additional sensing such as Hall- and inductive sensing from Azoteq.

Click Product page

Click library

• Author : Nenad Filipovic
• Date : Dec 2020.
• Type : I2C type

Software Support

We provide a library for the ProxFusion3 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 ProxFusion3 Click driver.

Standard key functions :

• Config Object Initialization function.

  void proxfusion3_cfg_setup ( proxfusion3_cfg_t *cfg );

• Initialization function.

  PROXFUSION3_RETVAL proxfusion3_init ( proxfusion3_t *ctx, proxfusion3_cfg_t *cfg );

• Click Default Configuration function.

  void proxfusion3_default_cfg ( proxfusion3_t *ctx );

Example key functions :

• ProxFusion 3 get touch function.

  uint8_t proxfusion3_get_touch ( proxfusion3_t *ctx );

• ProxFusion 3 check touch event function.

  uint8_t proxfusion3_check_touch_event ( proxfusion3_t *ctx );

• ProxFusion 3 get version info data function.

  err_t proxfusion3_get_version_info ( proxfusion3_t *ctx, uint8_t *product_number, uint8_t *software_version );

Examples Description

Display information about the last detected touch.

The demo application is composed of two sections :

Application Init

Initializes I2C driver, read and display version info value and start to write log.

void application_init ( void ) {
    log_cfg_t log_cfg;                  /**< Logger config object. */
    proxfusion3_cfg_t proxfusion3_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_printf( &logger, "\r\n---------------------------\r\n" );
    log_info( &logger, " Application Init " );

    // Click initialization.

    proxfusion3_cfg_setup( &proxfusion3_cfg );
    PROXFUSION3_MAP_MIKROBUS( proxfusion3_cfg, MIKROBUS_1 );
    err_t init_flag = proxfusion3_init( &proxfusion3, &proxfusion3_cfg );
    if ( init_flag == I2C_MASTER_ERROR ) {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }

    proxfusion3_default_cfg ( &proxfusion3 );
    log_info( &logger, " Application Task " );
    log_printf( &logger, "---------------------------\r\n" );
    Delay_ms ( 500 );

    proxfusion3_get_version_info( &proxfusion3, &product_number, &software_version );
    log_printf( &logger, "  Product Number   : 0x%.2X \r\n", ( uint16_t )product_number );
    log_printf( &logger, "  Software Version : 0x%.2X \r\n", ( uint16_t )software_version );
    log_printf( &logger, "---------------------------\r\n" );
    Delay_ms ( 1000 );
    log_printf( &logger, "      Touch Detection      \r\n" );
    log_printf( &logger, "---------------------------\r\n" );
}

Application Task

This is an example that demonstrates the use of the ProxFusion 3 Click board. In this example, we check the touch event and display the last detected touch. Results are being sent to the Usart Terminal where you can track their changes.

void application_task ( void ) {
    if ( proxfusion3_check_touch_event( &proxfusion3 ) == PROXFUSION3_EVENT_TOUCH ) {        
        uint8_t touch_data = proxfusion3_get_touch( &proxfusion3 );
        Delay_ms ( 100 );

        switch ( touch_data ) {
            case PROXFUSION3_TOUCH_POS_8: {
                log_printf( &logger, "       >>>   8   <<<       \r\n" );
                break;
            }
            case PROXFUSION3_TOUCH_POS_7: {
                log_printf( &logger, "       >>>   7   <<<       \r\n" );
                break;
            }
            case PROXFUSION3_TOUCH_POS_6: {
                log_printf( &logger, "       >>>   6   <<<       \r\n" );
                break;
            }
            case PROXFUSION3_TOUCH_POS_5: {
                log_printf( &logger, "       >>>   5   <<<       \r\n" );
                break;
            }
            case PROXFUSION3_TOUCH_POS_4: {
                log_printf( &logger, "       >>>   4   <<<       \r\n" );
                break;
            }
            case PROXFUSION3_TOUCH_POS_3: {
                log_printf( &logger, "       >>>   3   <<<       \r\n" );
                break;
            }
            case PROXFUSION3_TOUCH_POS_2: {
                log_printf( &logger, "       >>>   2   <<<       \r\n" );
                break;
            }
            case PROXFUSION3_TOUCH_POS_1: {
                log_printf( &logger, "       >>>   1   <<<       \r\n" );
                break;
            }
            default: {
                Delay_ms ( 10 );
                break;
            }
        }

        Delay_ms ( 10 );
    } else {
        Delay_ms ( 10 );
    }
}

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.ProxFusion3

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.