MUX 9 click

MUX 9 Click is a compact add-on board that contains a precise multiplexing solution. This board features the ADG1438, a CMOS 8-channel analog matrix switch with a high-speed serially controlled 4-wire interface from Analog Devices. Each switch is software-controlled (by a bit of the appropriate register) and conducts equally well in both directions, making it ideal for mux/demux applications. It is specified for a wide supply range ±15V/+12V/±5V where all channels exhibit break-before-make switching action, preventing momentary shorting when switching channels.

click Product page

Click library

• Author : Nenad Filipovic
• Date : Nov 2022.
• Type : SPI type

Software Support

We provide a library for the MUX 9 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 9 Click driver.

Standard key functions :

• mux9_cfg_setup Config Object Initialization function.

  void mux9_cfg_setup ( mux9_cfg_t *cfg );

• mux9_init Initialization function.

  err_t mux9_init ( mux9_t *ctx, mux9_cfg_t *cfg );

Example key functions :

• mux9_active_channel MUX 9 active channel function.

  err_t mux9_active_channel ( mux9_t *ctx, uint8_t sel_ch );

• mux9_reset MUX 9 reset function.

  void mux9_reset ( mux9_t *ctx );

• mux9_disable MUX 9 disable function.

  void mux9_disable ( mux9_t *ctx );

Example Description

This example demonstrates the use of MUX 9 click board™.

The demo application is composed of two sections :

Application Init

Initializes the driver and performs the reset.

void application_init ( void )
{
    log_cfg_t log_cfg;    /**< Logger config object. */
    mux9_cfg_t mux9_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.
    mux9_cfg_setup( &mux9_cfg );
    MUX9_MAP_MIKROBUS( mux9_cfg, MIKROBUS_1 );
    if ( SPI_MASTER_ERROR == mux9_init( &mux9, &mux9_cfg ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    mux9_reset( &mux9 );
    log_info( &logger, " Application Task " );
    log_printf( &logger, " -----------\r\n" );
}

Application Task

This is an example that shows the use of a MUX 9 click board™. This example shows switching channels (from CH 1 to CH 8) on and off. Results are being sent to the Usart Terminal where you can track their changes.

void application_task ( void )
{
    for ( uint8_t ch_pos = MUX9_SELECT_CH_1; ch_pos <= MUX9_SELECT_CH_8; ch_pos++ )
    {
        if ( MUX9_OK == mux9_active_channel( &mux9, ch_pos ) )
        {
            log_printf( &logger, " The Channel %d is activated. \r\n", ( uint16_t ) ch_pos );
            Delay_ms ( 1000 );
        }
    }
    log_printf( &logger, " -----------\r\n" );
    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.MUX9

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.