ADC 23 Click

ADC 23 Click is a compact add-on board that converts an analog voltage into a digital representation. This board features the ADS127L11, a wide-bandwidth 24-bit delta-sigma analog-to-digital converter from Texas Instruments. It is capable of data rates up to 400ksps using a wideband filter and up to 1067ksps using a low-latency filter. It also offers an excellent combination of AC performance and DC precision with low power consumption.

Click Product page

Click library

• Author : Nenad Filipovic
• Date : Aug 2023.
• Type : SPI type

Software Support

We provide a library for the ADC 23 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 ADC 23 Click driver.

Standard key functions :

• adc23_cfg_setup Config Object Initialization function.

  void adc23_cfg_setup ( adc23_cfg_t *cfg );

• adc23_init Initialization function.

  err_t adc23_init ( adc23_t *ctx, adc23_cfg_t *cfg );

• adc23_default_cfg Click Default Configuration function.

  err_t adc23_default_cfg ( adc23_t *ctx );

Example key functions :

• adc23_get_voltage ADC 23 read get voltage level function.

  err_t adc23_get_voltage ( adc23_t *ctx, float *voltage );

• adc23_read_conversion_data ADC 23 read conversion data function.

  err_t adc23_read_conversion_data ( adc23_t *ctx, int32_t *adc_data );

• adc23_start_conversion ADC 23 start conversion function.

  err_t adc23_start_conversion ( adc23_t *ctx );

Example Description

This example demonstrates the use of the ADC 23 Click board™ by reading and writing data by using SPI serial interface and reading results of AD conversion.

The demo application is composed of two sections :

Application Init

Initialization of SPI module and log UART. After driver initialization, the app executes a default configuration.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    adc23_cfg_t adc23_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.
    adc23_cfg_setup( &adc23_cfg );
    ADC23_MAP_MIKROBUS( adc23_cfg, MIKROBUS_1 );
    if ( SPI_MASTER_ERROR == adc23_init( &adc23, &adc23_cfg ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    if ( ADC23_ERROR == adc23_default_cfg ( &adc23 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

    log_info( &logger, " Application Task " );
    Delay_ms ( 100 );
}

Application Task

The demo application reads the voltage levels from analog input and displays the results. Results are being sent to the UART Terminal, where you can track their changes.

void application_task ( void )
{
    static float voltage = 0.0;
    if ( ADC23_OK == adc23_get_voltage( &adc23, &voltage ) )
    {
        log_printf( &logger, " Voltage : %.2f [mV]\r\n", voltage );
        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.ADC23

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.