i2cmux4

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I2C MUX 4 Click

I2C MUX 4 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 : MikroE Team
• Date : Sep 2020.
• Type : I2C type

Software Support

Example Description

This example demonstrates the use of the I2C MUX 4 Click.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.I2cMux4

Example Key Functions

• i2cmux4_cfg_setup Config Object Initialization function.

void i2cmux4_cfg_setup ( i2cmux4_cfg_t *cfg );

• i2cmux4_init Initialization function.

err_t i2cmux4_init ( i2cmux4_t *ctx, i2cmux4_cfg_t *cfg );

• i2cmux4_get_ch_interrupt Get channel interrupt function.

uint8_t i2cmux4_get_ch_interrupt ( i2cmux4_t *ctx );

• i2cmux4_rmt_read_bytes Generic read data function.

void i2cmux4_rmt_read_bytes ( i2cmux4_t *ctx, uint8_t reg, uint8_t *p_rx_data, uint8_t n_bytes );

• i2cmux4_check_int Check interrupt function.

uint8_t i2cmux4_check_int ( i2cmux4_t *ctx );

Application Init

Initializes the driver, enables the Click board and makes an initial log.

void application_init ( void )
{
    log_cfg_t log_cfg;
    i2cmux4_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.

    i2cmux4_cfg_setup( &cfg );
    I2CMUX4_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    i2cmux4_init( &i2cmux4, &cfg );

    i2cmux4_power_on( &i2cmux4, I2CMUX4_ENABLE_POWER_ON );
    Delay_ms ( 100 );
    
    i2cmux4_set_channel( &i2cmux4, I2CMUX4_SEL_CH_ALL_DISABLE, 0x00 );
    Delay_ms ( 100 );
}

Application Task

In this example, we read the device ID register of the connected Click boards. Channel 0 : 6DOF IMU 12 Click [slave address: 0x68; reg: 0x00; id val.: 0x24], Channel 1 : Compass 3 Click [slave address: 0x30; reg: 0x2F; id val.: 0x0C]. All data logs write on USB UART changes every 2 sec.

void application_task ( void )
{
    // CH 0 - 6DOF IMU 12 Click
    i2cmux4_set_channel( &i2cmux4, I2CMUX4_SEL_CH_0, 0x68 );
    Delay_ms ( 100 );

    i2cmux4_rmt_read_bytes( &i2cmux4, 0x00, &rx_data, 1 );
    Delay_ms ( 100 );

    log_printf( &logger, "    6DOF IMU 12 Click   \r\n" );
    log_printf( &logger, "- - - - - - - - - - - - \r\n" );
    log_printf( &logger, "       ID = 0x%.2X  \r\n", ( uint16_t ) rx_data );
    log_printf( &logger, "----------------------- \r\n" );
    Delay_ms ( 1000 );
    
    
    // CH 1 - Compass 3 Click
    i2cmux4_set_channel( &i2cmux4, I2CMUX4_SEL_CH_1, 0x30 );
    Delay_ms ( 100 );

    i2cmux4_rmt_read_bytes( &i2cmux4, 0x2F, &rx_data, 1 );
    Delay_ms ( 100 );

    log_printf( &logger, "      Compass 3 Click      \r\n" );
    log_printf( &logger, "- - - - - - - - - - - - \r\n" );
    log_printf( &logger, "       ID = 0x%.2X \r\n ", ( uint16_t ) rx_data );
    log_printf( &logger, "----------------------- \r\n" );
    Delay_ms ( 1000 );
}

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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