digipot12

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DIGI POT 12 Click

DIGI POT 12 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 : Nenad Filipovic
• Date : Apr 2023.
• Type : I2C type

Software Support

Example Description

This library contains API for DIGI POT 12 Click driver. The demo application uses a digital potentiometer to change the resistance values of both channels.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.DIGIPOT12

Example Key Functions

• digipot12_cfg_setup Config Object Initialization function.

void digipot12_cfg_setup ( digipot12_cfg_t *cfg );

• digipot12_init Initialization function.

err_t digipot12_init ( digipot12_t *ctx, digipot12_cfg_t *cfg );

• digipot12_default_cfg Click Default Configuration function.

err_t digipot12_default_cfg ( digipot12_t *ctx );

• digipot12_set_resistance DIGI POT 12 set the resistance function.

err_t digipot12_set_resistance ( digipot12_t *ctx, uint8_t wiper_sel, float res_kohm );

• digipot12_get_resistance DIGI POT 12 get the resistance function.

err_t digipot12_get_resistance ( digipot12_t *ctx, uint8_t wiper_sel, float *res_kohm );

Application Init

The initialization of I2C module, log UART, and additional pins. After the driver init, the app executes a default configuration.

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    digipot12_cfg_t digipot12_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.
    digipot12_cfg_setup( &digipot12_cfg );
    DIGIPOT12_MAP_MIKROBUS( digipot12_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == digipot12_init( &digipot12, &digipot12_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    if ( DIGIPOT12_ERROR == digipot12_default_cfg ( &digipot12 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }
    
    log_info( &logger, " Application Task " );
    log_printf( &logger, " ----------------------------\r\n" );
    Delay_ms ( 100 );
}

Application Task

This example demonstrates the use of the DIGI POT 12 Click board™. The demo application iterates through the entire wiper range and sets the resistance of both channels in steps of approximately 1kOhm. Results are being sent to the UART Terminal, where you can track their changes.

void application_task ( void ) 
{
    static float res_kohm;
    for ( uint8_t n_cnt = DIGIPOT12_RES_0_KOHM; n_cnt <= DIGIPOT12_RES_10_KOHM; n_cnt++ )
    {
        if ( DIGIPOT12_OK == digipot12_set_resistance( &digipot12, DIGIPOT12_WIPER_SEL_1, ( float ) n_cnt ) )
        {
            if ( DIGIPOT12_OK == digipot12_get_resistance( &digipot12, DIGIPOT12_WIPER_SEL_1, &res_kohm ) )
            {
                log_printf( &logger, " Rwb1 : %.2f kOhm\r\n", res_kohm );
                Delay_ms ( 100 );
            }
        }
        
        if ( DIGIPOT12_OK == digipot12_set_resistance( &digipot12, DIGIPOT12_WIPER_SEL_2, ( float ) ( DIGIPOT12_RES_10_KOHM - n_cnt ) ) )
        {
            if ( DIGIPOT12_OK == digipot12_get_resistance( &digipot12, DIGIPOT12_WIPER_SEL_2, &res_kohm ) )
            {
                log_printf( &logger, " Rwb2 : %.2f kOhm\r\n", res_kohm );
                Delay_ms ( 100 );
            }
        }
        log_printf( &logger, " ----------------------------\r\n" );
        Delay_ms ( 1000 );
        Delay_ms ( 1000 );
        Delay_ms ( 1000 );
        Delay_ms ( 1000 );
        Delay_ms ( 1000 );
    }
}

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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