capsense

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CapSense Click

CapSense 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.

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Click Library

• Author : MikroE Team
• Date : Dec 2019.
• Type : I2C type

Software Support

Example Description

This example waits user to press top and bottom button to turn Click's LEDs ON or OFF.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.CapSense

Example Key Functions

• capsense_cfg_setup Config Object Initialization function.

void capsense_cfg_setup ( capsense_cfg_t *cfg ); 

• capsense_init Initialization function.

err_t capsense_init ( capsense_t *ctx, capsense_cfg_t *cfg );

• capsense_default_cfg Click Default Configuration function.

err_t capsense_default_cfg ( capsense_t *ctx );

• capsense_get_slider_lvl This function gets slider level.

err_t capsense_get_slider_lvl( capsense_t *ctx, uint8_t *slider_lvl );

• capsense_read_data Read one byte from register address

err_t capsense_read_data( capsense_t *ctx, uint8_t reg_address, uint8_t *read_data );

• capsense_write_data Generic write data function

err_t capsense_write_data( capsense_t *ctx, uint8_t reg_address, uint8_t write_command );

Application Init

Initialize CapSense Click and logger.

void application_init ( void )
{
    log_cfg_t log_cfg;
    capsense_cfg_t cfg;

    /** 
     * 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.
    capsense_cfg_setup( &cfg );
    CAPSENSE_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    capsense_init( &capsense, &cfg );
    
    if ( CAPSENSE_ERROR == capsense_default_cfg ( &capsense ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }
    
    log_info( &logger, " Application Task " );
}

Application Task

Press top and bottom button and turn it ON or OFF button LED's.

void application_task ( void )
{
    static uint8_t current_led_state = 0;
    uint8_t output_lvl[ 10 ] = { 0 };
    uint8_t button_select = 0;
    uint8_t slider_lvl = 0;
    capsense_read_data( &capsense, CAPSENSE_CS_READ_STATUS0, &button_select );
    capsense_get_slider_lvl( &capsense, &slider_lvl );
    capsense_write_data( &capsense, CAPSENSE_OUTPUT_PORT0, current_led_state );
    Delay_ms ( 100 );

    if ( 8 == button_select )
    {
        current_led_state ^= 0x01;
        log_printf( &logger, "Toggle LED1\r\n");
        Delay_ms ( 100 );
    }
    if ( 16 == button_select )
    {
        current_led_state ^= 0x02;
        log_printf( &logger, "Toggle LED2\r\n");
        Delay_ms ( 100 );
    }
    if ( 24 == button_select )
    {
        current_led_state = ~current_led_state;
        log_printf( &logger, "Toggle both LEDs\r\n");
        Delay_ms ( 100 );
    }

    if ( slider_lvl )
    {
        bits_to_str( slider_lvl, output_lvl );
        log_printf( &logger, "Slider level - channels [5-1]:\t%s \r\n", &output_lvl[ 3 ] );
        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.

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