(untested) add user callbacks for 'pause' and 'continue'

src/uClock.cpp

@@ -191,6 +191,9 @@ void uClockClass::continue_playing() {
         } else {
             state = STARTING;
         }
+        if (onClockContinueCallback) {
+            onClockContinueCallback();
+        }
     }
 }
 
@@ -201,6 +204,9 @@ void uClockClass::pause()
             continue_playing();
         } else {
             state = PAUSED;
+            if (onClockPauseCallback) {
+                onClockPauseCallback();
+            }
         }
     }
 }

src/uClock.h

@@ -116,6 +116,14 @@ class uClockClass {
             onClockStopCallback = callback;
         }
 
+        void setOnClockContinue(void (*callback)()) {
+            onClockStartCallback = callback;
+        }
+
+        void setOnClockPause(void (*callback)()) {
+            onClockPauseCallback = callback;
+        }
+
         void init();
         void setPPQN(PPQNResolution resolution);
 
@@ -172,6 +180,8 @@ class uClockClass {
         void (*onSync24Callback)(uint32_t tick);
         void (*onClockStartCallback)();
         void (*onClockStopCallback)();
+        void (*onClockContinueCallback)();
+        void (*onClockPauseCallback)();
 
         // internal clock control
         // uint16_t ppqn;