mikroelektronika/wavefrom_click

Library for AD9833.

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Waveform Click

• CIC Prefix : WAVEFORM
• Author : Dusan Poluga
• Verison : 1.0.0
• Date : apr 2018.

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Software Support

We provide a library for the Waveform 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

Library contains generic functions for controlling the waveform and frequency output of the click board.

Key functions :

• void waveform_sineOutput(uint32_t f) - Function for setting the sine wave output.
• void waveform_triangleOutput(uint32_t f) - Function for setting the triangle wave output.
• void waveform_squareOutput(uint32_t f) - Function for setting the square wave output.

Examples Description

Description :

The application is composed of three sections :

• System Initialization - Initialize the GPIO and communication structures.
• Application Initialization - Initialize the communication interface and configure the click board.
• Application Task - Predefined characters are inputed from the serial port. Depending on the character sent the signal frequency, waveform or amplitude will be changed.

void applicationTask()
{
    char rxDat;
    uint32_t freqTmp;
 
    if(UART_Rdy_Ptr())
    {
       rxDat = UART_Rd_Ptr();
       mikrobus_logWrite(&rxDat,_LOG_BYTE);
    }
    if(rxDat>0)
    {
       switch(rxDat)
       {
           case waveform_cmd[0]: {
                                     waveform_digipotInc();
                                     rxDat = 0;
                                     break;
                                 }
           case waveform_cmd[1]: {
                                     waveform_digipotDec();
                                     rxDat = 0;
                                     break;
                                 }
           case waveform_cmd[2]: {
                                     freq += 1;
                                     freqTmp = freq << 14;
                                     waveform_sineOutput(freqTmp);
                                     rxDat = 0;
                                     break;
                                 }
           case waveform_cmd[3]: {
                                     freq -= 1;
                                     freqTmp = freq << 14;
                                     waveform_sineOutput(freqTmp);
                                     rxDat = 0;
                                     break;
                                 }
           case waveform_cmd[4]: {
                                     freq += 1;
                                     freqTmp = freq << 14;
                                     waveform_triangleOutput(freqTmp);
                                     rxDat = 0;
                                     break;
                                 }
           case waveform_cmd[5]: {
                                     freq -= 1;
                                     freqTmp = freq << 14;
                                     waveform_triangleOutput(freqTmp);
                                     rxDat = 0;
                                     break;
                                 }
           case waveform_cmd[6]: {
                                     freq += 1;
                                     freqTmp = freq << 14;
                                     waveform_squareOutput(freqTmp);
                                     rxDat = 0;
                                     break;
                                 }
           case waveform_cmd[7]: {
                                     freq -= 1;
                                     freqTmp = freq << 14;
                                     waveform_squareOutput(freqTmp);
                                     rxDat = 0;
                                     break;
                                 }
           default : {
                         break;
                     }
       }
    }
     rxDat = 0;
}

Additional Functions :

• uint32_t waveform_aproxFreqcalculation(float freqency) - This function is used to calculate the aproximate value that will be written to the frequency set register.

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

Other mikroE Libraries used in the example:

• SPI library
• UART library
• Conversions library
• C_Sring library

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.

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