private void OnEchoPortChanged(object sender, DigitalInputPortEventArgs e)
{
if (e.Value == true)
// if(echoPort.State == true)
{
tickStart = DateTime.Now.Ticks;
return;
}
// Console.WriteLine("false");
// Calculate Difference
var elapsed = DateTime.Now.Ticks - tickStart;
// Return elapsed ticks
// x10 for ticks to micro sec
// divide by 58 for cm (assume speed of sound is 340m/s)
var curDis = elapsed / 580;
CurrentDistance = curDis;
//debug - remove
Console.WriteLine($"{elapsed}, {curDis}, {CurrentDistance}, {DateTime.Now.Ticks}");
//restore this before publishing to hide false results
// if (CurrentDistance < MinimumDistance || CurrentDistance > MaximumDistance)
// CurrentDistance = -1;
DistanceDetected?.Invoke(this, new DistanceEventArgs(CurrentDistance));
}
private void EchoChanged(object sender, DigitalInputPortEventArgs e)
{
//Console.WriteLine("value of echo:{0}", echo.State);
if (!_IsStarted)
{
//Console.WriteLine("Start is false");
return;
}
if (e.Value)
{
//Console.WriteLine("Echo value is true, reset duration");
//duration = DateTime.Now.Ticks; // Start the clock.
return;
}
// Echo got something back. We can calculate the duration.
var endDate = DateTime.Now.Ticks;
var delta = endDate - duration;
//Console.WriteLine("delta {0}", delta);
CurrentDistance = delta / SpeedOfSoundFactor;
DistanceDetected?.Invoke(this, new DistanceEventArgs(CurrentDistance));
_IsStarted = false;
}
private void OnEchoPortChanged(object sender, DigitalInputPortEventArgs e)
{
if (e.Value == true)
// if(_echoPort.State == true)
{
/// Console.WriteLine("true");
tickStart = DateTime.Now.Ticks;
return;
}
// Console.WriteLine("false");
// Calculate Difference
float elapsed = DateTime.Now.Ticks - tickStart;
// Return elapsed ticks
// x10 for ticks to micro sec
// divide by 58 for cm (assume speed of sound is 340m/s)
CurrentDistance = elapsed / 580f;
// if (CurrentDistance < MinimumDistance || CurrentDistance > MaximumDistance)
// CurrentDistance = -1;
DistanceDetected?.Invoke(this, new DistanceEventArgs(CurrentDistance));
}
private void TriggerEchoPort_ValueChanged(GpioPin sender, GpioPinValueChangedEventArgs e)
{
if (triggerEchoPort.Read() == GpioPinValue.High)
{
tickStart = DateTime.Now.Ticks;
return;
}
// Calculate Difference
float elapsed = DateTime.Now.Ticks - tickStart;
// Return elapsed ticks
// x10 for ticks to micro sec
// divide by 58 for cm (assume speed of sound is 340m/s)
CurrentDistance = elapsed / 580f;
// if (CurrentDistance < MinimumDistance || CurrentDistance > MaximumDistance)
// CurrentDistance = -1;
DistanceDetected?.Invoke(this, new DistanceEventArgs(CurrentDistance));
}
private void AnalogInputPort_Changed(object sender, FloatChangeResult e)
{
CurrentDistance = 26 / e.New;
DistanceDetected?.Invoke(this, new DistanceEventArgs(CurrentDistance));
}
private void AnalogValueChanged(float newValue)
{
CurrentDistance = 26 / newValue;
DistanceDetected?.Invoke(this, new DistanceEventArgs(CurrentDistance));
}
