Library Description

The library covers all the necessary functions to control RTD 2 Click board. A library performs the communication with the 4ADS1247 24-Bit, 2-kSPS, Analog-To-Digital Converters With Programmable Gain Amplifier (PGA) For Sensor Measurement via I2C interface.

Key functions:

• void rtd2_hw_reset ( void ) - Hardware reset function.
• void rtd2_default_config ( void ) - Set default configuration function.
• float rtd2_get_temperature ( void ) - Get temperature function.

Examples description

The application is composed of three sections :

• System Initialization - Initializes SPI, sets AN, RST and CS pins as output, INT pin as input and start to write log.
• Application Initialization - Initialization driver enables - SPI, hardware reset the device and set default configuration and start the measurement, also write log.
• Application Task - (code snippet) This is an example that demonstrates the use of RTD 2 Click board. RTD 2 Click board can be used to measure ambient temperature from the PT100 3-wire temperature probe wired to the 4ADS1247 24-Bit, 2-kSPS, Analog-To-Digital Converters With Programmable Gain Amplifier (PGA) For Sensor Measurement on the RTD 2 click board All data logs write on USB uart changes for every 1 sec.

void application_task ( )
{
    if ( rtd2_check_new_data_ready( ) == RTD2_NEW_DATA_IS_READY )
    {
        temperature = rtd2_get_temperature( );
        FloatToStr( temperature, log_text );
        mikrobus_logWrite( " Temperature : ", _LOG_TEXT );
        mikrobus_logWrite( log_text, _LOG_TEXT );
        mikrobus_logWrite( " C", _LOG_LINE );
        mikrobus_logWrite( "--------------------------", _LOG_LINE );
        Delay_ms( 1000 );
    }
    else
    {
        rtd2_enable_start( RTD2_START_CONVERSION_DISABLE );
        Delay_ms( 1000 );
    }
}

Other mikroE Libraries used in the example:

• SPI
• 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.