use my Timer class on all platforms, it works better than the freertos version

src/mesh/RadioLibInterface.h

@@ -1,5 +1,6 @@
 #pragma once
 
+#include "PeriodicTask.h"
 #include "RadioInterface.h"
 
 #include <RadioLib.h>
@@ -11,13 +12,12 @@
 #define INTERRUPT_ATTR
 #endif
 
-class RadioLibInterface : public RadioInterface
+class RadioLibInterface : public RadioInterface, private PeriodicTask
 {
     /// Used as our notification from the ISR
     enum PendingISR { ISR_NONE = 0, ISR_RX, ISR_TX, TRANSMIT_DELAY_COMPLETED };
 
     volatile PendingISR pending = ISR_NONE;
-    volatile bool timerRunning = false;
 
     /**
      * Raw ISR handler that just calls our polymorphic method
@@ -104,7 +104,14 @@ class RadioLibInterface : public RadioInterface
 
     static void timerCallback(void *p1, uint32_t p2);
 
+    virtual void doTask();
+
   protected:
+    /// Initialise the Driver transport hardware and software.
+    /// Make sure the Driver is properly configured before calling init().
+    /// \return true if initialisation succeeded.
+    virtual bool init();
+    
     /**
      * Convert our modemConfig enum into wf, sf, etc...
      *