touchpad3

---

Touchpad 3 Click

Touchpad 3 Click demo application is developed using the NECTO Studio, ensuring compatibility with mikroSDK's open-source libraries and tools. Designed for plug-and-play implementation and testing, the demo is fully compatible with all development, starter, and mikromedia boards featuring a mikroBUS™ socket.

---

Click Library

• Author : Jelena Milosavljevic
• Date : Jul 2021.
• Type : I2C type

Software Support

Example Description

This example prints the coordinate points of the position we touch on a Click. We use RST and INT pins. The whole project is done through i2c communication.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.Touchpad3

Example Key Functions

• touchpad3_cfg_setup Config Object Initialization function.

void touchpad3_cfg_setup ( touchpad3_cfg_t *cfg );

• touchpad3_init Initialization function.

err_t touchpad3_init ( touchpad3_t *ctx, touchpad3_cfg_t *cfg );

• touchpad3_default_cfg Click Default Configuration function.

void touchpad3_default_cfg ( touchpad3_t *ctx );

• touchpad3_general_configuration The function performs the general configuration of the MTCH6301 Projected Capacitive Touch Controller on the TouchPad 3 Click board.

void touchpad3_general_configuration ( touchpad3_t *ctx );

• touchpad3_decoding_configuration The function performs the decoding configuration of the MTCH6301 Projected Capacitive Touch Controller on the TouchPad 3 Click board.

void touchpad3_decoding_configuration ( touchpad3_t *ctx );

• touchpad3_sensor_mapping_configuration The function configures the sensor mapping of the MTCH6301 Projected Capacitive Touch Controller on the TouchPad 3 Click board.

void touchpad3_sensor_mapping_configuration ( touchpad3_t *ctx );

Application Init

Initialization driver enables - Initializes I2C, set RST pin as an output, set INT pin as input and start to write log. I2C, perform a hardware reset, configuration (general, decoding, sensor mapping), get device ID and enable the touch, also write log.

void application_init ( void ) 
{
    log_cfg_t log_cfg;                 /**< Logger config object. */
    touchpad3_cfg_t touchpad3_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.
    touchpad3_cfg_setup( &touchpad3_cfg );
    TOUCHPAD3_MAP_MIKROBUS( touchpad3_cfg, MIKROBUS_1 );
    err_t init_flag = touchpad3_init( &touchpad3, &touchpad3_cfg );
    if ( I2C_MASTER_ERROR == init_flag ) { 
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }

    touchpad3_default_cfg ( &touchpad3 );
    
    touch_id_state = 0;
    log_printf( &logger, "------------------------------\r\n" );
    device_id = touchpad3_get_device_id( &touchpad3 );
    Delay_ms ( 100 );
    log_printf( &logger, "     Get Device ID : %d \r\n      ", device_id );
    log_printf( &logger, "------------------------------\r\n" );
    Delay_ms ( 100 );
    log_info( &logger, " Application Task " );
    Delay_ms ( 100 );
    
    status_data = touchpad3_config_touch( &touchpad3, TOUCHPAD3_TOUCH_GESTURE_ENABLE );
    
    log_printf( &logger, "     Touch Enable Status:     \r\n");
    display_status( );
    log_printf( &logger, "------------------------------\r\n" );
    Delay_ms ( 100 );
}

Application Task

This is an example that demonstrates the use of the TouchPad 3 Click board. TouchPad 3 Click board uses USB UART log to display X and Y coordinates of the touch, depending on the selected Touch ID.

void application_task ( void ) 
{
    if ( touchpad3_get_int( &touchpad3 ) == TOUCHPAD3_INT_STATUS_HIGH ) {
       
       touchpad3_get_touch( &touchpad3, &touch_data, &x_axis, &y_axis );
       Delay_ms ( 100 );

        if ( ( touch_data.tch_state == TOUCHPAD3_STATE_TCH ) && ( touch_data.touch_id == touch_id_state ) ) {   
            log_printf( &logger, "  X Coordinate : %d   \r\n" , x_axis );
            log_printf( &logger, "  Y Coordinate : %d   \r\n" , y_axis );
            log_printf( &logger, "------------------------------\r\n" );
            Delay_ms ( 100 );
        }
    }
}

Application Output

This Click board can be interfaced and monitored in two ways:

• Application Output - Use the "Application Output" window in Debug mode for real-time data monitoring. Set it up properly by following this tutorial.
• UART Terminal - Monitor data via the UART Terminal using a USB to UART converter. For detailed instructions, check out this tutorial.

Additional Notes and Information

The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.

---