adc

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ADC Click

ADC 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 : Nemanja Medakovic
• Date : Nov 2019.
• Type : SPI type

Software Support

Example Description

This example demonstrates the use of ADC Click board. The all channels can be configured as single-ended or pseudo-differential pair.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.Adc

Example Key Functions

• adc_cfg_setup Configuration Object Setup function.

void adc_cfg_setup ( adc_cfg_t *cfg );

• adc_init Click Initialization function.

adc_err_t adc_init ( adc_t *ctx, adc_cfg_t *cfg );

• adc_get_single_ended_ch Get Single-Ended Channel function.

uint16_t adc_get_single_ended_ch ( adc_t *ctx, adc_ch_t channel );

• adc_get_differential_ch Get Pseudo-Differential Pair function.

uint16_t adc_get_differential_ch ( adc_t *ctx, adc_ch_t channel );

Application Init

Initializes SPI driver, performs the reference voltage selection and initializes UART console for results logging.

void application_init( void )
{
    log_cfg_t log_cfg;
    adc_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.

    adc_cfg_setup( &cfg );
    ADC_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    adc_init( &adc, &cfg );
}

Application Task

Reads voltage level of channels 0 and 1 in the both configurations, single-ended and pseudo-differential pair, every 1 second. All channels results will be calculated to millivolts [mV].

void application_task( void )
{
    adc_get_single_ended_ch( &adc, ADC_CH0_OR_CH01 );
    adc_get_single_ended_ch( &adc, ADC_CH1_OR_CH10 );
    adc_get_single_ended_ch( &adc, ADC_CH2_OR_CH23 );
    adc_get_single_ended_ch( &adc, ADC_CH3_OR_CH32 );
    adc_get_differential_ch( &adc, ADC_CH0_OR_CH01 );

    log_printf( &logger, "* CH0 = %u mV\r\n", adc.ch0 );
    log_printf( &logger, "* CH1 = %u mV\r\n", adc.ch1 );
    log_printf( &logger, "* CH2 = %u mV\r\n", adc.ch2 );
    log_printf( &logger, "* CH3 = %u mV\r\n", adc.ch3 );
    log_printf( &logger, "* CH0 - CH1 = %d mV\r\n", adc.ch01 );
    log_printf( &logger, "-----------------------------\r\n" );

    Delay_ms ( 1000 );
}

Note

In single-ended mode the all channels must be in the range from Vss (GND) to Vref (3V3 by default). In pseudo-differential mode the IN- channel must be in the range from (Vss - 100mV) to (Vss + 100mV). The IN+ channel must be in the range from IN- to (Vref + IN-). If any of conditions are not fullfilled, the device will return 0 or Vref voltage level, and measurements are not valid.

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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