diff --git a/menu_main.cpp b/menu_main.cpp
new file mode 100644
index 0000000..e9a4985
--- /dev/null
+++ b/menu_main.cpp
@@ -0,0 +1,132 @@
+#include "menu_main.h"
+
+#include "morse.h"
+#include "settings.h"
+#include "utils.h"
+
+MenuReturn_e runMainMenu(ButtonPress_e tuner_button,
+                         ButtonPress_e touch_button,
+                         Point touch_point,
+                         int16_t knob);
+
+Menu_t mainMenu = {
+  runMainMenu
+  nullptr
+};
+
+static Menu_t* const rootMenu = &mainMenu;
+
+bool mainMenuSelecting = false;//Tracks if we're selecting buttons with knob, or adjusting frequency
+uint8_t mainMenuSelectedItemRaw = 0;
+
+void drawMainMenu(void)
+{
+  //TODO
+}
+
+void mainMenuTune(int16_t knob)
+{
+  static uint32_t current_freq = 0;
+
+  if((0 == knob) && (GetActiveVfoFreq() == current_freq)){
+    //Nothing to do - we're already set!
+    return;
+  }
+
+  current_freq = GetActiveVfoFreq();
+  uint32_t new_freq = current_freq + (50 * knob);
+  
+  //Transition from below to above the traditional threshold for USB
+  if(current_freq < THRESHOLD_USB_LSB && new_freq >= THRESHOLD_USB_LSB){
+    SetActiveVfoMode(VfoMode_e::VFO_MODE_USB);
+  }
+  
+  //Transition from above to below the traditional threshold for USB
+  if(current_freq >= THRESHOLD_USB_LSB && new_freq < THRESHOLD_USB_LSB){
+    SetActiveVfoMode(VfoMode_e::VFO_MODE_LSB);
+  }
+
+  setFrequency(new_freq);
+  current_freq = new_freq;
+}
+
+MenuReturn_e runMainMenu(ButtonPress_e tuner_button,
+                         ButtonPress_e touch_button,
+                         Point touch_point,
+                         int16_t knob)
+{
+  if(runSubmenu(&mainMenu,
+                drawMainMenu,
+                tuner_button,
+                touch_button,
+                touch_point,
+                knob)){
+    //Submenu processed the input, so return now
+    return MenuReturn_e::StillActive;//main menu always returns StillActive
+  }//end submenu
+
+  //Submenu didn't run, so handle the inputs ourselves
+
+  //Check tuner_button
+  if(ButtonPress_e::NotPressed != tuner_button){
+    switch(tuner_button){
+      default://Fallthrough intended
+      case ButtonPress_e::NotPressed:
+      {
+        //Nothing to do
+        break;
+      }
+      case ButtonPress_e::ShortPress:
+      {
+        if(mainMenuSelecting){
+          uint8_t menu_index = mainMenuSelectedItemRaw/MENU_KNOB_COUNTS_PER_ITEM;
+          //TODO: activate button
+        }
+        mainMenuSelecting = !mainMenuSelecting;
+
+        //Don't handle touch or knob on this run
+        return MenuReturn_e::StillActive;//main menu always returns StillActive
+        break;
+      }
+      case ButtonPress_e::LongPress:
+      {
+        if(!globalSettings.morseMenuOn){
+            globalSettings.morseMenuOn = true;//set before playing
+            morseLetter(2);
+        }
+        else{
+            morseLetter(4);
+            globalSettings.morseMenuOn = false;//unset after playing
+        }
+        SaveSettingsToEeprom();
+        //Don't handle touch or knob on this run
+        return MenuReturn_e::StillActive;//main menu always returns StillActive
+        break;
+      }
+    }//switch
+  }//tuner_button
+
+  else if(ButtonPress_e::NotPressed != touch_button){
+    //We treat long and short presses the same, so no need to have a switch
+    Button b;
+    if(findPressedButton(mainMenuButtons,MAIN_MENU_NUM_BUTTONS,&b,touch_point)){
+      //TODO: activate button
+    }
+    else{
+      //Touch detected, but not on our buttons, so ignore
+    }
+  }//touch_button
+
+  else{//Neither button input type found, so handle the knob
+    if(mainMenuSelecting){
+      mainMenuSelectedItemRaw += LIMIT(mainMenuSelectedItemRaw+knob,0,MAIN_MENU_NUM_BUTTONS*MENU_KNOB_COUNTS_PER_ITEM);
+    }
+    else{
+      mainMenuTune(knob);
+    }
+  }
+
+  //
+
+  return MenuReturn_e::StillActive;//main menu always returns StillActive
+}
\ No newline at end of file
diff --git a/menu_main.h b/menu_main.h
new file mode 100644
index 0000000..ec8ec84
--- /dev/null
+++ b/menu_main.h
@@ -0,0 +1,2 @@
+#include "menu.h"
+extern static Menu_t* const rootMenu;