Library Description

The library covers all the necessary functions to control I2C Extend 2 Click board™. Library performs a standard I2C interface communication.

Key functions:

• void i2cextend2_rmt_write ( uint8_t rmt_slave_addr, uint8_t reg, uint8_t tx_data ) - Generic write data to the remote device function.
• uint8_t i2cextend2_rmt_read ( uint8_t rmt_slave_addr, uint8_t reg ) - Generic read data from the remote device function.
• void i2cextend2_enable ( uint8_t en_extend ) - Enable extend function.

Examples description

The application is composed of three sections :

• System Initialization - Initializes I2C, set CS pin as outputs and begins to write log.
• Application Initialization - Initialization driver enables - I2C, check communication with device 6DOF IMU 11 Click connected to the I2C Extend 2 Click, set default configuration and start measurement.
• Application Task - (code snippet) This is an example which demonstrates the use of I2C Extend 2 Click board™. In this example, we read Accel and Mag axis of the connected 6DOF IMU 11 Click board™ to the I2C Extend 2 Click which is connected by a LAN cable to I2C Extend 2 Click placed in the mikroBUS 1. Results are being sent to the Usart Terminal where you can track their changes. All data logs write on USB uart changes for every 2 sec.

void application_task ( )
{
    mikrobus_logWrite( "   Accel   |    Mag    ", _LOG_LINE );
    mikrobus_logWrite( "------------------------", _LOG_LINE );

    i2cextend2_6dofimu11_get_axis( C6DOFIMU11_REG_ACCEL_XOUT_L );
    mikrobus_logWrite( " X :", _LOG_TEXT );
    IntToStr( axis, log_text );
    mikrobus_logWrite( log_text, _LOG_TEXT );
    mikrobus_logWrite( " | ", _LOG_TEXT );

    i2cextend2_6dofimu11_get_axis( C6DOFIMU11_REG_MAG_XOUT_L );
    mikrobus_logWrite( " X :", _LOG_TEXT );
    IntToStr( axis, log_text );
    mikrobus_logWrite( log_text, _LOG_LINE );

    i2cextend2_6dofimu11_get_axis( C6DOFIMU11_REG_ACCEL_YOUT_L );
    mikrobus_logWrite( " Y :", _LOG_TEXT );
    IntToStr( axis, log_text );
    mikrobus_logWrite( log_text, _LOG_TEXT );
    mikrobus_logWrite( " | ", _LOG_TEXT );

    i2cextend2_6dofimu11_get_axis( C6DOFIMU11_REG_MAG_YOUT_L );
    mikrobus_logWrite( " Y :", _LOG_TEXT );
    IntToStr( axis, log_text );
    mikrobus_logWrite( log_text, _LOG_LINE );

    i2cextend2_6dofimu11_get_axis( C6DOFIMU11_REG_ACCEL_ZOUT_L );
    mikrobus_logWrite( " Z :", _LOG_TEXT );
    IntToStr( axis, log_text );
    mikrobus_logWrite( log_text, _LOG_TEXT );
    mikrobus_logWrite( " | ", _LOG_TEXT );

    i2cextend2_6dofimu11_get_axis( C6DOFIMU11_REG_MAG_ZOUT_L );
    mikrobus_logWrite( " Z :", _LOG_TEXT );
    IntToStr( axis, log_text );
    mikrobus_logWrite( log_text, _LOG_LINE );
    mikrobus_logWrite( "------------------------", _LOG_LINE );
    Delay_ms( 1000 );
}

• void i2cextend2_6dofimu11_get_axis ( uint8_t axis_out_reg ) - Read axis.

Other mikroE Libraries used in the example:

• I2C
• UART
• Conversions

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. The terminal available in all MikroElektronika compilers, or any other terminal application of your choice, can be used to read the message.