Library Description

The library covers all the necessary functions that enables the usage of the Hall Current 7 Click board™. It offers reading raw data from output register and calculations for raw output voltage, current and average current passing through the on board Hall Effect Sensor.

Key functions:

• uint16_t hallcurrent7_read_voltage ( uint16_t v_ref ); - Function is used to calculate raw output voltage.
• int16_t hallcurrent7_calc_current ( uint16_t v_ref ); - Function is used to calculate current.
• int16_t hallcurrent7_avg_current ( uint16_t v_ref ); - Function is used to calculate average current and correct for output error.

Examples description

The application is composed of three sections :

• System Initialization - Initializes I2C module and LOG structure.
• Application Initialization - Initalizes I2C driver and makes an initial log.
• Application Task - This example shows the capabilities of the Hall Current 7 Click board™ by measuring current passing through the on board Hall Effect Sensor and displaying data every two seconds. In order to get correct clculations user should change "v_ref" value to his own power supply voltage.

void application_task ( )
{
    current = hallcurrent7_avg_current( v_ref );
    IntToStr( current, log_txt );
    mikrobus_logWrite( "Current: ", _LOG_TEXT );
    mikrobus_logWrite( log_txt, _LOG_TEXT );
    mikrobus_logWrite( "mA", _LOG_LINE );

    mikrobus_logWrite( "------------------------", _LOG_LINE );
    Delay_ms( 2000 );
}

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.