Library Description

The library initializes and defines the I2C bus driver and drivers that offer a choice for writing and reading
one byte or two bytes of data in and from registers. The library includes a functions for reading temperature from internal or external sensor,reading and writing from control registers, fan fault duty cycle register, alert mask register, ideality factor Register, remote\local high set-point register,remote\local overtemperature set-point register, TACH count threshold registers, lookup table registers, direct duty-cycle control register and EEPROM LOAD/WRITE register.Current PWM duty-cycle register TACH1 count register, TACH2 Count register and status register can only be read. User can also use functions to check the state of the ALR SHD FF INT pins.

Key functions:

• void fan2_writeCtrl1( uint8_t wrData ) - Function writes 8-bit data into control register 1.
• float fan2_readLocalTempReg() - Function is used to read temperature from an internal measuring device.
• void fan2_writeLookupTable( uint8_t lutVal ) - Function is used to write into Lookup Table registers.

Examples description

The application is composed of the three sections :

• System Initialization - Initializes I2C module, LOG and GPIO structures, sets AN, RST, CS and INT pins as input.
• Application Initialization - Initalizes I2C driver, applies manual control settings and makes an initial log.
• Application Task - (code snippet) This example demonstrates the use of Fan 2 Click board. It measures current temperature, using an internal sensor and logs values. In case of temerature exceeding 30 degree centigrade it rans a fan.

void applicationTask( )
{
    temperature = fan2_readLocalTempReg();

    FloatToStr( temperature, logTxt );
    mikrobus_logWrite( "Temperature : ", _LOG_TEXT );
    mikrobus_logWrite( logTxt, _LOG_TEXT );
    mikrobus_logWrite( degCel, _LOG_LINE );
    if( temperature > 30 )
    {
        fan2_writeDirDutCycCtrlReg( _FAN2_DUTYCYCLE_100 );
    }
    else
    {
        fan2_writeDirDutCycCtrlReg( _FAN2_DUTYCYCLE_0 );
    }
    Delay_ms( 1000 );
}

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.