private void StopThreads()
{
if (USBRX != null)
{
USBRX.CurrentMode = LibRXFFT.Libraries.eTransferMode.Stopped;
}
if (PowerUpdateThread != null)
{
PowerUpdateThread.Abort();
PowerUpdateThread = null;
}
if (DemodDlg != null)
{
DemodDlg.Close();
DemodDlg = null;
}
if (Demod != null)
{
Demod.AudioInSampleSource.Close();
Demod.AudioOutShmem.Close();
Demod.Stop();
Demod = null;
}
if (USBRX != null)
{
USBRX.Close();
USBRX = null;
}
}
private void btnOpen_Click(object sender, EventArgs e)
{
if (USBRX == null)
{
USBRXDevice device = new USBRXDevice();
device.ShowConsole(false);
device.TunerCombination = USBRXDevice.eCombinationType.AR5000;
try
{
if (!device.Init())
{
ErrorMessage = "There was no USB-RX found on USB bus.";
return;
}
}
catch (BadImageFormatException ex)
{
ErrorMessage = "Unsupported architecture.";
return;
}
catch (Exception ex)
{
ErrorMessage = "Unhandled exception." + Environment.NewLine + e;
return;
}
USBRX = device;
FilterList.NCOFreq = USBRX.Atmel.TCXOFreq;
FilterList.UpdateFilters("Filter");
FilterList.AddFilters("..\\..\\..\\Filter");
FilterList.FilterSelected += new EventHandler(FilterList_FilterSelected);
frequencySelector1.UpperLimit = USBRX.Tuner.HighestFrequency;
frequencySelector1.LowerLimit = USBRX.Tuner.LowestFrequency;
/* bar update thread */
InSampleSource = new ShmemSampleSource("RX-Radio Reader", USBRX.ShmemChannel, 1, 0);
InSampleSource.DataFormat = ByteUtil.eSampleFormat.Direct16BitIQFixedPointLE;
PowerUpdateThread = new Thread(() =>
{
InSampleSource.SamplesPerBlock = 1024;
while (true)
{
InSampleSource.Flush();
InSampleSource.Read();
double maxValue = DBTools.MaximumDb(InSampleSource.SourceSamplesI, InSampleSource.SourceSamplesQ);
BeginInvoke(new Action(() =>
{
powerBar.Amplitude = (maxValue + 100) / 100;
powerBar.LinePosition = (maxValue + 100) / 100;
powerBar.Enabled = true;
powerBar.Invalidate();
}));
Thread.Sleep(250);
}
});
PowerUpdateThread.Start();
/* demodulator */
Demod = new AudioDemodulator();
Demod.AudioInSampleSource = new ShmemSampleSource("RX-FFT Audio Decoder", USBRX.ShmemChannel, 1, 0);
Demod.AudioInSampleSource.DataFormat = ByteUtil.eSampleFormat.Direct16BitIQFixedPointLE;
Demod.AudioOutShmem = new SharedMem(-2, 1, "RX-Radio Demodulated Audio");
lock (Demod.DemodOptions)
{
Demod.DemodOptions.SoundDevice = new DXSoundDevice(Handle);
}
Demod.Start();
/* demodulator dialog */
DemodDlg = new DemodulationDialog(Demod.DemodOptions);
DemodDlg.Show();
/* finished */
USBRX.CurrentMode = LibRXFFT.Libraries.eTransferMode.Stopped;
btnOpen.Text = "Close";
}
else
{
StopThreads();
btnOpen.Text = "Open";
}
}