Fixed PWM frequency watching and restoring.

PwmLib/PwmManager.cs

@@ -19,7 +19,7 @@ public bool FreqWatch
             {
                 return _freqWatch;
             }
-            private set
+            set
             {
                 _freqWatch = value;
             }
@@ -81,7 +81,7 @@ public uint SetFrequency(int frequency)
             // Actually, I am in no way responsible for any damage of your device cause by this app, sorry :)
             if (frequency < 100 || frequency > 100000)
             {
-                OnError(frequency, $"Frequency {frequency} is not allowed. Frequency should be >= 200 and <= 2000.");
+                OnError(frequency, $"Frequency {frequency} is not allowed. Frequency should be >= 200 and <= 100000.");
                 return 100500;
             }
 

Wpf/App.xaml.cs

@@ -3,6 +3,7 @@
 using System.ComponentModel;
 using NotifyIcon = System.Windows.Forms.NotifyIcon;
 using PwmLib;
+using System.Windows.Threading;
 
 namespace Wpf
 {
@@ -55,6 +56,16 @@ protected override void OnStartup(StartupEventArgs e)
             // by some reason _pwm.SetFrequency doesn't work if called from a background thread
             // _pwm.LookAfterFreq();
             CheckLastFrequency();
+
+            var timer = new DispatcherTimer { Interval = TimeSpan.FromSeconds(5) };
+            timer.Tick += OnTimedEvent;
+            timer.Start();
+            _pwm.FreqWatch= true;
+        }
+
+        private void OnTimedEvent(object sender, EventArgs e)
+        {
+            CheckLastFrequency();
         }
 
         private void CheckLastFrequency()
@@ -130,6 +141,7 @@ private void setFreq_Click(object sender, EventArgs e)
             }
 
             _mainWindow.Show();
+            _mainWindow.Focus();
         }
     }
 }