Added dispatcher start only if needed.

src/main/fc/fc_dispatch.c

@@ -27,6 +27,17 @@
 #include "fc/fc_dispatch.h"
 
 static dispatchEntry_t *head = NULL;
+static bool dispatchEnabled = false;
+
+bool isDispatchEnabled(void)
+{
+    return dispatchEnabled;
+}
+
+void dispatchStart(void)
+{
+    dispatchEnabled = true;
+}
 
 void dispatchProcess(uint32_t currentTime)
 {

src/main/fc/fc_dispatch.h

@@ -26,5 +26,7 @@ typedef struct dispatchEntry_s {
     struct dispatchEntry_s *next;
 } dispatchEntry_t;
 
+bool isDispatchEnabled(void);
+void dispatchStart(void);
 void dispatchProcess(uint32_t currentTime);
 void dispatchAdd(dispatchEntry_t *entry, int delayUs);

src/main/fc/fc_tasks.c

@@ -235,7 +235,9 @@ void fcTasksInit(void)
     setTaskEnabled(TASK_BATTERY, feature(FEATURE_VBAT) || feature(FEATURE_CURRENT_METER));
     setTaskEnabled(TASK_RX, true);
 
-    setTaskEnabled(TASK_DISPATCH, true);
+    if (isDispatchEnabled()) {
+        setTaskEnabled(TASK_DISPATCH, true);
+    }
 
 #ifdef BEEPER
     setTaskEnabled(TASK_BEEPER, true);

src/main/rx/spektrum.c

@@ -316,6 +316,9 @@ bool spektrumInit(const rxConfig_t *rxConfig, rxRuntimeConfig_t *rxRuntimeConfig
         rssi_channel = 0;
     }
 
+    if (serialPort && srxlEnabled) {
+        dispatchStart();
+    }
     return serialPort != NULL;
 }