ADC 11 Click

ADC 11 Click is a compact add-on board that contains a high-performance data converter. This board features the LTC1864, a 16-bit 250ksps analog-to-digital converter from Analog Devices. With a typical supply current of only 850µA at the maximum sampling frequency, the LTC1864 is among the lowest power consumption ADCs available. After conversion, the LTC1864 goes into a low-power Sleep mode, further reducing the supply current. That’s why it can run at proper micro-power levels in applications that do not require the maximum sampling rate of the LTC1864.

Click Product page

Click library

• Author : Nenad Filipovic
• Date : Feb 2021.
• Type : SPI type

Software Support

We provide a library for the Adc11 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 Adc11 Click driver.

Standard key functions :

• adc11_cfg_setup Config Object Initialization function.

  void adc11_cfg_setup ( adc11_cfg_t *cfg );

• adc11_init Initialization function.

  ADC11_RETVAL adc11_init ( adc11_t *ctx, adc11_cfg_t *cfg );

• adc11_default_cfg Click Default Configuration function.

  void adc11_default_cfg ( adc11_t *ctx );

Example key functions :

• adc11_generic_read ADC 11 data reading function.

  err_t adc11_generic_read ( adc11_t *ctx, uint16_t *adc_data );

• adc11_set_calibration ADC 11 set calibration function.

  err_t adc11_set_calibration ( adc11_t *ctx, adc11_calibration_data_t *adc_val );

• adc11_get_voltage ADC 11 get voltage function.

  err_t adc11_get_voltage ( adc11_t *ctx, adc11_calibration_data_t *adc_val, float *voltage );

Example Description

This library contains API for ADC 11 Click driver. The library contains drivers for measuring ADC values
and for calculation voltage.

The demo application is composed of two sections :

Application Init

Initializes SPI driver and triggers the built-in calibration.

void application_init ( void ) {
    log_cfg_t log_cfg;      /**< Logger config object. */
    adc11_cfg_t adc11_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 );

    // Click initialization.

    adc11_cfg_setup( &adc11_cfg );
    ADC11_MAP_MIKROBUS( adc11_cfg, MIKROBUS_1 );
    err_t init_flag  = adc11_init( &adc11, &adc11_cfg );
    if ( init_flag == SPI_MASTER_ERROR ) {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }

    log_printf( &logger, "---------------------------\r\n");
    log_printf( &logger, "        Calibration        \r\n");
    log_printf( &logger, "- - - - - - - - - - - - - -\r\n");
    log_printf( &logger, "> Turn OFF the Power unit <\r\n");
    log_printf( &logger, "- - - - - - - - - - - - - -\r\n");
    log_printf( &logger, "  In the following 5 sec.  \r\n");
    log_printf( &logger, " turn OFF the Power Supply \r\n");
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

    log_printf( &logger, "-------------------------\r\n");
    log_printf( &logger, "    Start calibration    \r\n");

    if ( adc11_set_calibration( &adc11, &avg_adc_data ) == ADC11_OK ) {
        log_printf( &logger, "---------------------------\r\n");
        log_printf( &logger, "    Calibration  Done    \r\n");
        Delay_ms ( 1000 );    
    }

    log_printf( &logger, "---------------------------\r\n");
    log_printf( &logger, "    Start measurements :   \r\n");
    log_printf( &logger, "---------------------------\r\n");
}

Application Task

This is an example that demonstrates the use of the ADC 11 Click board. In this example, we monitor and display voltage [ V ]. Results are being sent to the Usart Terminal, where you can track their changes. All data logs write on USB UART changes every 2 sec.

void application_task ( void ) {
    adc11_get_voltage( &adc11, &avg_adc_data, &voltage );
    log_printf( &logger, "     Volatge : %.3f V      \r\n", voltage );
    log_printf( &logger, "---------------------------\r\n");
    Delay_ms ( 1000 );
    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.Adc11

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. The terminal available in all Mikroelektronika compilers, or any other terminal application of your choice, can be used to read the message.