analogmux3

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Analog MUX 3 Click

Analog MUX 3 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 : Mar 2021.
• Type : SPI type

Software Support

Example Description

This is an example that demonstrates the use of the Analog MUX 3 Click board. This application controls the multiplexing of a single input channel with an eight-channel matrix switch.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.AnalogMux3

Example Key Functions

• analogmux3_cfg_setup Config Object Initialization function.

void analogmux3_cfg_setup ( analogmux3_cfg_t *cfg );

• analogmux3_init Initialization function.

err_t analogmux3_init ( analogmux3_t *ctx, analogmux3_cfg_t *cfg );

• analogmux3_default_cfg Click Default Configuration function.

void analogmux3_default_cfg ( analogmux3_t *ctx );

• analogmux3_generic_write Analog MUX 3 data writing function.

err_t analogmux3_generic_write ( analogmux3_t *ctx, uint8_t data_in );

• analogmux3_set_channel Analog MUX 3 set channel function.

err_t analogmux3_set_channel ( analogmux3_t *ctx, uint8_t mux_ch );

• analogmux3_read_an_pin_voltage Analog MUX 3 read AN pin voltage level function.

err_t analogmux3_read_an_pin_voltage ( analogmux3_t *ctx, float *data_out );

Application Init

Initializes SPI and ADC driver, set Vref, STM32F407ZG - 2.048 V, PIC18F97J94 3.3 V, set the default configuration and start to write log.

void application_init ( void ) 
{
    log_cfg_t log_cfg;                /**< Logger config object. */
    analogmux3_cfg_t analogmux3_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.

    analogmux3_cfg_setup( &analogmux3_cfg );
    ANALOGMUX3_MAP_MIKROBUS( analogmux3_cfg, MIKROBUS_1 );
    
    // Vref STM32F407ZG
    analogmux3_cfg.vref = 2.048;
    
    // Vref PIC18F97J94
    // analogmux3_cfg.vref = 3.3;
    
    err_t init_flag  = analogmux3_init( &analogmux3, &analogmux3_cfg );
    if ( init_flag == SPI_MASTER_ERROR ) {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }

    analogmux3_default_cfg ( &analogmux3 );
    log_info( &logger, " Application Task " );
    Delay_ms ( 100 );
}

Application Task

This is an example that shows the use of a Analog MUX 3 Click board. In this example, we switch from channel AN0 to channel AN7, read and display the analog value and voltage on the active channel. Results are being sent to the Usart Terminal where you can track their changes.

void application_task ( void ) 
{
    for ( uint8_t ch_pos = ANALOGMUX3_SET_CHANNEL_0; ch_pos <= ANALOGMUX3_SET_CHANNEL_7; ch_pos++ ) {
        analogmux3_set_channel( &analogmux3, ch_pos );
        Delay_ms ( 1000 );
        
        uint16_t analogmux3_an_value = 0;
    
        log_printf( &logger, "   CHANNEL    : AN%u     \r\n", ch_pos );
        log_printf( &logger, "- - - - - - - - - - - - - \r\n" );

        if ( analogmux3_read_an_pin_value ( &analogmux3, &analogmux3_an_value ) != ADC_ERROR ) {
            log_printf( &logger, "   ADC Value  : %u\r\n", analogmux3_an_value );
        }
    
        float analogmux3_an_voltage = 0;

        if ( analogmux3_read_an_pin_voltage ( &analogmux3, &analogmux3_an_voltage ) != ADC_ERROR ) {
            log_printf( &logger, "   AN Voltage : %.3f V \r\n", analogmux3_an_voltage );
        }
        
        log_printf( &logger, "-------------------------\r\n" );
    }
}

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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