private void ReadLoop()
{
while (!_threadShouldStop)
{
if (_port.IsOpen)
{
int bytesToRead = _port.BytesToRead;
if (bytesToRead > 0)
{
byte[] buffer = new byte[bytesToRead];
_port.Read(buffer, 0, bytesToRead);
SamplePoint[] samples = new SamplePoint[bytesToRead];
for (int x = 0; x < bytesToRead; x++)
{
samples[x].Value = ((float)buffer[x] / 255) * 5;
samples[x].TimeOffset = 20 * Utility.MICROSECOND;
}
_visualizer.Channel.WriteSamples(samples);
}
}
Thread.Sleep(10);
}
_thread = null;
}
/// <summary>
/// Gets specified amount of samples from the end of the buffer.
/// </summary>
/// <param name="length">Number of samples to copy from the current end of the buffer.</param>
public SamplePoint[] GetLast(int length)
{
if (length > _buffer.Length)
{
length = _buffer.Length;
}
//TODO: refactor... this can be done simpler, in a loop
SamplePoint[] ret = new SamplePoint[length];
lock (_locker)
{
if (length <= _pointer)
{
//if we have enough in front of the pointer, just return it
CopyArray(_buffer, _pointer - length, ret, 0, length);
}
else
{
//overflow on the left side
//first take the part from the end of the buffer
int lenToStart = _pointer;
int partOnTheEnd = length - lenToStart;
CopyArray(_buffer, _buffer.Length - partOnTheEnd, ret, 0, partOnTheEnd);
//take the rest from the beginning of the buffer
CopyArray(_buffer, 0, ret, partOnTheEnd, lenToStart);
}
}
return(ret);
}
private void btnDummyProbe_Click(object sender, EventArgs e)
{
SamplePoint[] points = new SamplePoint[10];
for (int x = 0; x < points.Length; x++)
{
points[x].Value = x / 10f;
points[x].TimeOffset = 20 * Utility.MICROSECOND;
}
_visualizer.Channel.WriteSamples(points);
}