MUX 5 Click

MUX 5 Click is a compact add-on board that contains a precise multiplexing solution. This board features the MAX14661, a serially controlled, dual-channel analog multiplexer from Analog Devices, allowing any of the 16 pins to be connected to either common pin simultaneously in any combination. The MAX14661 features Beyond-the-Rails™ capability that allows ±5.5V signals to be passed with any supply configuration alongside a configurable host interface that supports SPI and I2C serial communications. Both modes provide individual control of each independent switch so that any combination of switches can be applied.

Click Product page

Click library

• Author : Stefan Filipovic
• Date : Oct 2022.
• Type : I2C/SPI type

Software Support

We provide a library for the MUX 5 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 MUX 5 Click driver.

Standard key functions :

• mux5_cfg_setup Config Object Initialization function.

  void mux5_cfg_setup ( mux5_cfg_t *cfg );

• mux5_init Initialization function.

  err_t mux5_init ( mux5_t *ctx, mux5_cfg_t *cfg );

• mux5_default_cfg Click Default Configuration function.

  err_t mux5_default_cfg ( mux5_t *ctx );

Example key functions :

• mux5_i2c_write_register This function writes a desired data to the selected register by using I2C serial interface.

  err_t mux5_i2c_write_register ( mux5_t *ctx, uint8_t reg, uint8_t data_in );

• mux5_i2c_read_register This function reads data from the selected register by using I2C serial interface.

  err_t mux5_i2c_read_register ( mux5_t *ctx, uint8_t reg, uint8_t *data_out );

• mux5_set_channels_state This function sets a desired @b ch_state of the channels selected with @b ch_mask.

  err_t mux5_set_channels_state ( mux5_t *ctx, uint16_t ch_mask, uint8_t ch_state );

Example Description

This example demonstrates the use of MUX 5 Click board by mapping the common connection A and B to different channels every 5 seconds.

The demo application is composed of two sections :

Application Init

Initializes the driver and performs the Click default configuration.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    mux5_cfg_t mux5_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.
    mux5_cfg_setup( &mux5_cfg );
    MUX5_MAP_MIKROBUS( mux5_cfg, MIKROBUS_1 );
    if ( MUX5_OK != mux5_init( &mux5, &mux5_cfg ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    if ( MUX5_OK != mux5_default_cfg ( &mux5 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

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

Application Task

Maps the common connection A and B to different channels every 5 seconds, and displays the channels state on the USB UART.

void application_task ( void )
{
    static uint8_t ch_num = 0;
    if ( MUX5_OK == mux5_set_channels_state ( &mux5, MUX5_CHANNEL_ALL, MUX5_CHANNEL_STATE_HIGH_Z ) )
    {
        log_printf ( &logger, " All channels disconnected\r\n" );
    }
    Delay_ms ( 1000 );
    if ( MUX5_OK == mux5_set_channels_state ( &mux5, MUX5_CHANNEL_1 << ch_num, MUX5_CHANNEL_STATE_COM_A ) )
    {
        log_printf ( &logger, " Channel %u connected to COM_A\r\n", ( uint16_t ) ( ch_num + 1 ) );
    }
    if ( MUX5_OK == mux5_set_channels_state ( &mux5, MUX5_CHANNEL_16 >> ch_num, MUX5_CHANNEL_STATE_COM_B ) )
    {
        log_printf ( &logger, " Channel %u connected to COM_B\r\n\n", ( uint16_t ) ( 16 - ch_num ) );
    }
    if ( ++ch_num >= 16 )
    {
        ch_num = 0;
    }
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    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.MUX5

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.