• CIC Prefix : RTD
• Author : Djordje Rosic
• Verison : 1.0.0
• Date : Nov 2017

We provide a library for the RTD Click on our LibStock page, as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.

Library Description

This library contains functions for basic reading and writing into the click's registers, as well as convert temperature function that can convert raw data into degrees celsius. Check documentation for more details.

Key functions :

• void rtd_writeRegister(uint8_t regAddress, uint8_t writeData) - Writes data into a register
• uint16_t rtd_readTemperature() - Reads temperature from temperature registers
• float rtd_convertTemperature(uint16_t inputData, uint16_t referentResistance) - Converts raw data to degrees celsius

Examples Description

The application is composed of three sections :

• System Initialization - Initializes SPI peripheral, CS pin, and UART logger
• Application Initialization - Initializes RTD click driver, and sets the proper configuration mode for three wire RTD.
• Application Task (code snippet) - Measures temperature, converts the data to celsius degrees, and outputs them via UART.

void applicationTask()
{
    uint16_t readValue;
    float convertedValue;
    char testTxt [20];

    readValue = rtd_readTemperature();
    convertedValue = rtd_convertTemperature(readValue, _RTD_REF_RESISTANCE_470);

    floatToStr(convertedValue, testTxt);
    mikrobus_logWrite("Current temperature: ", _LOG_TEXT );
    mikrobus_logWrite(testTxt, _LOG_LINE );

    delay_ms(1000);
}

The full application code, and ready to use projects can be found on our LibStock page.

Other mikroE Libraries used in the example:

• UART
• Conversions
• C_string

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.