public void Dispose() {
try {
IsReady = false;
if (_workerThread.IsAlive) {
_workerThread.Abort();
}
_device.Close();
_device.Dispose();
_device = null;
} catch (Exception e) {
Log.Exception(e);
} finally {
}
}
public UsbFmTmcReader() {
_device = USBRadioDevice.FindDevice(PID, VID);
_device.PropertyChanged += (s, e) => {
if (e.PropertyName == "RDS" && _device.RDS != null) {
_device.RDS.PropertyChanged += (s1, e1) => {
if (e1.PropertyName == "TMC") {
if (TmcTransmissionArrived != null) {
TmcTransmissionArrived(this, new TmcTransmissionArrivedEventArgs(
_device.Registers[USBFM.USBRDSDeviceMethods.Native.RDSB],
_device.Registers[USBFM.USBRDSDeviceMethods.Native.RDSC],
_device.Registers[USBFM.USBRDSDeviceMethods.Native.RDSD]));
}
}
};
}
};
}
internal static ushort FromFrequency(this double frequency, USBRadioDevice device) {
double band = (device.Registers[Native.SYSCONFIG2] & Native.SYSCONFIG2_BAND) != 0 ? 76 : 87.5, spacing = 0.2;
switch (device.Registers[Native.SYSCONFIG2] & Native.SYSCONFIG2_SPACE) {
case Native.SYSCONFIG2_SPACE_200KHZ: spacing = 0.2; break;
case Native.SYSCONFIG2_SPACE_100KHZ: spacing = 0.1; break;
case Native.SYSCONFIG2_SPACE_50KHZ: spacing = 0.05; break;
}
return (ushort)(((frequency - band) / spacing) + .0001);
}
internal static double ToFrequency(this ushort channel, USBRadioDevice device) {
double frequency = 0;
double band = 87.5, spacing = 0.2;
//Determine the band and spacing
band = (device.Registers[Native.SYSCONFIG2] & Native.SYSCONFIG2_BAND) != 0 ? 76 : 87.5;
switch (device.Registers[Native.SYSCONFIG2] & Native.SYSCONFIG2_SPACE) {
case Native.SYSCONFIG2_SPACE_200KHZ: spacing = 0.2; break;
case Native.SYSCONFIG2_SPACE_100KHZ: spacing = 0.1; break;
case Native.SYSCONFIG2_SPACE_50KHZ: spacing = 0.05; break;
}
//Calculate the frequency and add .0001 to round up numbers not quite close enough to the frequency
frequency = (int)(((band + (spacing * channel)) + .0001) * 100.0) / 100.0;
return frequency;
}
