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Sine Wave

The following signal function generates a sine wave signal. The input signal is provided to the VTREG AIN2. The variables volts, frequency, offset, and duration are used to adjust the signal.

  Generate Sine Wave Signal on AD Channel 2
SIGNAL void AIN2_Sine (void)  {
  float volts;        // peak-to-peak voltage
  float frequency;    // output frequency in Hz
  float offset;       // voltage offset
  float duration;     // duration in Seconds
  float val;
  long  i, end;

  volts     = 1.4;
  offset    = 1.6;
  frequency = 1800;
  duration  = 0.1;

  printf ("Sine Wave Signal on AD Channel 2.\n");

  end = (duration * 100000);
  for (i = 0 ; i < end; i++)  {
    val = __sin (frequency * (((float) STATES) / CLOCK) * 2 * 3.1415926);
    AIN2 = (val * volts) + offset;
    swatch (0.00001);                // in 10 uSec steps


Start debugging in simulation mode and drag the port into the Logic Analyzer. Open the Toolbox and click the button AIN2 Sin to view the signal output:

Sine Wave Output Displayed on Logic Analyzer Window

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