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mikroSDK Library

Temp-Log 4 click

Rating:

5

Author: MikroElektronika Team

Last Updated: 2018-12-10

Category: Measurement

Downloaded: 35 times

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Temp-Log 4 Click is a temperature measuring Click board featuring the SE97B IC, an accurate temperature sensor IC with integrated EEPROM. Besides the thermal sensor, this IC is equipped with additional 256 bytes of EEPROM, integrated on the same die.

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mikroSDK Library Blog

Temp-Log 4 Click

Temp-Log 4 Click

Native view of the Temp-Log 4 Click board.

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Temp-Log 4 click

Temp-Log 4 click

Front and back view of the Temp-Log 4 Click board.

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Library Description

The library performs a control of the Temp-Log 4 Click board. There are a functions that offer a choice to measure the ambient temperature and set a temperature limit values to generate alarm. The library also can save a desired configurations or temperature values to the EEPROM, which has size of 256 bytes. For more details check documentation.

Key functions:

  • T_TEMPLOG4_RETVAL templog4_writeReg( uint8_t regAddr, uint16_t dataIn ) - Function writes a 16bit data to the desired register.
  • void templog4_repeatedRead( uint16_t *dataOut ) - Function reads a 16bit data from the register on which the internal address pointer was last set.
  • T_TEMPLOG4_RETVAL templog4_getTemp( uint8_t tempSel, T_TEMPLOG4_DEG *tempOut ) - Function gets a temperature value from the desired temperature register calculated to the Celsius degrees.
  • T_TEMPLOG4_RETVAL templog4_setTemp( uint8_t tempSel, T_TEMPLOG4_DEG tempIn ) - Function sets a desired temperature register on the desired value calculated to the Celsius degrees.

Examples description

The application is composed of the three sections :

  • System Initialization - Initializes peripherals and pins.
  • Application Initialization - Initializes I2C interface and performs a device configuration for properly working. Also sets the temperature limit to the desired values.
  • Application Task - (code snippet) - First ensures that the minimum conversion time is met, and then reads the ambient temperature calculated to the Celsius degrees. Also checks the limit status and shows a message when some limit condition is met. Note : The temperature range that can be measured or written is from -40 to +125 Celsius degrees. The resolution of ambient temperature measurement is 11bit, or 0.125 Celsius degrees. The limit temperature resolution is always a 10bit, or 0.25 Celsius degrees. If user wants to enable the EEPROM Write Protection, the A0 pin on the device must be set to the high voltage level. This high voltage level for EEPROM Write Protection must be in range from 7V to 10V, in other cases can be up to VDD.
void applicationTask()
{
    templog4_waitConvDone();

    retStatus = templog4_getTemp( _TEMPLOG4_TEMP_AMBIENT_REG, &temperature );

    FloatToStr( temperature, text );
    floatCut();
    mikrobus_logWrite( "**  Ambient temperature is : ", _LOG_TEXT );
    mikrobus_logWrite( text, _LOG_TEXT );
    logUnit();
    mikrobus_logWrite( "  **", _LOG_LINE );

    checkLimitStatus();

    Delay_ms( 300 );
}

Additional Functions :

  • floatCut - Makes that float values be rounded on two decimal places.
  • logUnit - Writes a Celsius degrees symbol on uart terminal.
  • checkLimitStatus - Checks the limit status for each temperature reading cycle and writes a message on uart terminal when some limit condition is met.

Other mikroE Libraries used in the example:

  • Conversions
  • I2C
  • UART

Additional notes and informations

Depending on the development board you are using, you may need USB UART clickUSB UART 2 clickor 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.

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