Overflow on OverrideCHxx functions on ARM boards (range is now

-150:+150)

radio/src/mixer.cpp

@@ -252,8 +252,10 @@ int16_t applyLimits(uint8_t channel, int32_t value)
   if (lim->revert) ofs = -ofs; // finally do the reverse.
 
 #if defined(OVERRIDE_CHANNEL_FUNCTION)
-  if (safetyCh[channel] != -128) // if safety channel available for channel check
+  if (safetyCh[channel] != OVERRIDE_CHANNEL_UNDEFINED) {
+    // safety channel available for channel check
     ofs = calc100toRESX(safetyCh[channel]);
+  }
 #endif
 
   return ofs;

radio/src/opentx.cpp

@@ -110,7 +110,7 @@ uint8_t heartbeat;
 uint8_t stickMode;
 
 #if defined(OVERRIDE_CHANNEL_FUNCTION)
-int8_t safetyCh[NUM_CHNOUT];
+safetych_t safetyCh[NUM_CHNOUT];
 #endif
 
 union ReusableBuffer reusableBuffer;
@@ -1871,7 +1871,7 @@ void evalFunctions()
 
 #if defined(OVERRIDE_CHANNEL_FUNCTION)
   for (uint8_t i=0; i<NUM_CHNOUT; i++) {
-    safetyCh[i] = -128; // not defined
+    safetyCh[i] = OVERRIDE_CHANNEL_UNDEFINED;
   }
 #endif
 

radio/src/opentx.h

@@ -863,7 +863,14 @@ struct TimerState {
 extern TimerState timersStates[MAX_TIMERS];
 
 #if defined(OVERRIDE_CHANNEL_FUNCTION)
-extern int8_t safetyCh[NUM_CHNOUT];
+#if defined(CPUARM)
+  typedef int16_t safetych_t;
+  #define OVERRIDE_CHANNEL_UNDEFINED -4096
+#else
+  typedef int8_t safetych_t;
+  #define OVERRIDE_CHANNEL_UNDEFINED -128
+#endif
+extern safetych_t safetyCh[NUM_CHNOUT];
 #endif
 
 extern uint8_t trimsCheckTimer;