/// <summary>
/// Calculates the time.
/// </summary>
/// <returns>The time.</returns>
/// <param name="timebase">Timebase.</param>
/// <param name="marker1">Marker1.</param>
/// <param name="marker2">Marker2.</param>
/// <param name="frame">Frame.</param>
public static double CalculateTime(TimeBase timebase, Marker marker1, Marker marker2, Grid frame)
{
var pixelsPerDiv = frame.Width / frame.HorizontalDivs;
var distance = Math.Abs(marker1.Value - marker2.Value);
var divs = distance / pixelsPerDiv;
var result = divs * TimeBaseConverter.ToSeconds(timebase);
return(result);
}
private void UpdateVoltTimeIndicator()
{
if (_ScopeView.ScalingTime)
{
_VoltTimeIndicator.Text = TimeBaseConverter.ToString(Oscilloscope.TimeBase);
}
else
{
_VoltTimeIndicator.Text = VoltsPerDivisionConverter.ToString(Oscilloscope.Channels [_ScopeView.SelectedChannel].VoltsPerDivision, Oscilloscope.Channels [_ScopeView.SelectedChannel].AttenuationFactor);
}
}
/// <summary>
/// Registers the pinch recognizer.
/// </summary>
private void RegisterPinchRecognizer()
{
float startDistance;
startDistance = 0.0f;
pinchGesture = new UIPinchGestureRecognizer((pg) => {
if (pg.State == UIGestureRecognizerState.Began)
{
if (pg.NumberOfTouches == 2)
{
CGPoint firstPoint = pg.LocationOfTouch(0, this);
CGPoint secondPoint = pg.LocationOfTouch(1, this);
startDistance = CalculateDistance(firstPoint, secondPoint);
}
VoltTimeIndicator.Hidden = false;
}
else if (pg.State == UIGestureRecognizerState.Changed)
{
float distance;
if (pg.NumberOfTouches == 2)
{
CGPoint firstPoint = pg.LocationOfTouch(0, this);
CGPoint secondPoint = pg.LocationOfTouch(1, this);
distance = CalculateDistance(firstPoint, secondPoint);
if (PointsAreHorizontal(firstPoint, secondPoint))
{
if (distance > startDistance + 50)
{
startDistance = distance;
wfs210.TimeBase = wfs210.TimeBase.Cycle(-1);
}
else if (distance < startDistance - 50)
{
startDistance = distance;
wfs210.TimeBase = wfs210.TimeBase.Cycle(1);
}
VoltTimeIndicator.Text = TimeBaseConverter.ToString(wfs210.TimeBase);
}
else
{
if (distance > startDistance + 50)
{
startDistance = distance;
Service.Execute(new NextVoltsPerDivisionCommand(SelectedChannel));
}
else if (distance < startDistance - 50)
{
startDistance = distance;
Service.Execute(new PreviousVoltsPerDivisionCommand(SelectedChannel));
}
VoltTimeIndicator.Text = VoltsPerDivisionConverter.ToString(wfs210.Channels [SelectedChannel].VoltsPerDivision, wfs210.Channels [SelectedChannel].AttenuationFactor);
}
}
}
else if (pg.State == UIGestureRecognizerState.Ended)
{
VoltTimeIndicator.Hidden = true;
ApplyMarkerValuesToScope();
OnNewData(null);
Update();
}
});
this.AddGestureRecognizer(pinchGesture);
}
/// <summary>
/// Generates a signal.
/// </summary>
/// <param name="channel">Channel.</param>
/// <param name="addNoise">If set to <c>true</c> add noise.</param>
public void GenerateSignal(Channel channel, bool addNoise = true)
{
Oscilloscope oscilloscope = channel.DeviceContext.Device;
Random random = new Random();
double randomPhase = random.Next(0, 628) / 100;
if (!oscilloscope.Hold)
{
channel.Samples.Overflow = false;
for (int i = 0; i < channel.Samples.Count; i++)
{
double gnd = 1, input = 0;
double tl = oscilloscope.Trigger.Level;
switch (channel.InputCoupling)
{
case InputCoupling.AC:
gnd = 1;
input = 0;
break;
case InputCoupling.DC:
gnd = 1;
input = 1;
break;
case InputCoupling.GND:
gnd = 0;
input = 0;
break;
}
double samplesPerVolt = 25 / VoltsPerDivisionConverter.ToVolts(channel.VoltsPerDivision, channel.AttenuationFactor);
double a = Amplitude * samplesPerVolt;
double o = input * Offset * samplesPerVolt;
double samplesPerDiv;
switch (oscilloscope.TimeBase)
{
case TimeBase.Tdiv1us:
samplesPerDiv = 10;
break;
case TimeBase.Tdiv2us:
samplesPerDiv = 20;
break;
default:
samplesPerDiv = 50;
break;
}
double t = i * TimeBaseConverter.ToSeconds(oscilloscope.TimeBase) / samplesPerDiv;
if ((Math.Floor(a) == 0) || (Math.Floor(gnd) == 0))
{
Phase = 0;
}
else if ((tl < (channel.YPosition - (o + a))) || (tl > (channel.YPosition + (o + a))))
{
Phase = randomPhase;
}
else if (oscilloscope.Trigger.Slope == TriggerSlope.Rising)
{
Phase = Math.Asin(((channel.YPosition - o) - tl) / a);
}
else
{
Phase = Math.PI - Math.Asin((tl - (channel.YPosition - o)) / a);
}
int value = (int)Math.Round(channel.YPosition - gnd * (o + a * Math.Sin(2 * Math.PI * Frequency * t + Phase)));
channel.Samples [i] = (byte)value.LimitToRange(0, 255);
}
if (addNoise)
{
GenerateNoise(channel);
}
}
}
void UpdateTimeBaseText()
{
lblTimebase.Text = TimeBaseConverter.ToString(Oscilloscope.TimeBase);
}