Library Description

The library covers all the necessary functions to control ccRF 2 Click board. A library performs the communication with the device via SPI interface with CC1120 single-chip radio transceiver.

Key functions:

• uint8_t ccrf2_readByteReg( uint16_t regAddress ) - Read the byte of data function.
• void ccrf2_writeBytesReg( uint16_t regAddress, uint8_t *writeData, uint8_t nBytes ) - Sequential write data function.
• uint8_t ccrf2_writeTXfifo( uint8_t *writeData, uint8_t nBytes ) - Write TX FIFO register function.

Examples description

The application is composed of the three sections :

• System Initialization - Initializes SPI and LOG structures sets AN, INT and PWM pin as input and CS and RST pins as output and start to write log.
• Application Initialization - Initialization driver enables - SPI, hardware reset chip, sets default configuration, sets manual calibration, sets operation mode, also write log.
• Application Task - This is an example which demonstrates the use of ccRF 2 click board. If RX mode selected, checks if new data byte has received in RX buffer ( ready for reading ), and if ready than reads one byte from RX buffer. In the second case, the application task writes received message data via UART. Results are being sent to the Usart Terminal where you can track their changes.
• Commands : â€‹'T' - TX mode; 'R' - RX mode; 'I' - Idle mode;

void applicationTask()
{
    char receivedData;
    
    if ( UART_Rdy_Ptr() )
    {
        receivedData = UART_Rd_Ptr();

        switch ( receivedData )
        {
            case 'T' :
            {
                modeSelected = _CCRF2_TX_MODE;
                sendFlag = 0;
                readingFlag = 0;
                Delay_ms( 200 );
                ccrf2_setTXmode();

                mikrobus_logWrite( "       TX  Mode       ", _LOG_LINE );
                mikrobus_logWrite( "----------------------", _LOG_LINE );
                break;
            }
            case 'R' :
            {
                modeSelected = _CCRF2_RX_MODE;
                receiveFlag = 0;
                ccrf2_setRXmode();
                readingFlag = 1;

                mikrobus_logWrite( "       RX  Mode       ", _LOG_LINE );
                mikrobus_logWrite( "----------------------", _LOG_LINE );
                break;
            }
            case 'I' :
            {
                modeSelected = _CCRF2_IDLE_MODE;

                mikrobus_logWrite( "      Idle  Mode      ", _LOG_LINE );
                mikrobus_logWrite( "----------------------", _LOG_LINE );
                break;
            }
        }
    }

    switch( modeSelected )
    {
        case _CCRF2_TX_MODE:
        {
            ccrf2_sendTXdata( &txBuffer[ 0 ], 8 );
            Delay_ms( 1000 );
            break;
        }
        case _CCRF_RX_MODE:
        {
            if ( readingFlag )
            {
                ccrf2_receiveRXdata( &rxBuffer[ 0 ] );
                lengthRx = sizeof( rxBuffer );
    
                for ( cnt = 0; cnt < lengthRx; cnt++ )
                {
                    mikrobus_logWrite( " rxBuffer[ ", _LOG_TEXT );
                    ByteToStr( cnt, logText );
                    ltrim( logText );
                    rtrim( logText );
                    mikrobus_logWrite( logText, _LOG_TEXT );
                    mikrobus_logWrite( " ] = ", _LOG_TEXT );
                    ByteToStr( rxBuffer[ cnt ], logText );
                    ltrim( logText );
                    mikrobus_logWrite( logText, _LOG_LINE );
                }

                Delay_ms( 1000 );
                mikrobus_logWrite( "----------------------", _LOG_LINE );
            }
            break;
        }
    }
}

Other mikroE Libraries used in the example:

• SPI
• UART
• Conversion

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.