fix hud display will be clear sometimes. (#185)

Author: leonunix

mazda/callbacks.cpp

@@ -758,11 +758,19 @@ void MazdaEventCallbacks::HandleNaviTurnDistance(IHUConnectionThreadInterface& s
     navi_data->distance_unit = now_unit;
     navi_data->distance = now_distance;
     navi_data->changed = 1;
+    navi_data->previous_msg = navi_data->previous_msg+1;
+    if (navi_data->previous_msg == 8) {
+      navi_data->previous_msg = 1;
+    }
   }
 
   if (navi_data->time_until != request.time_until()) {
     navi_data->time_until = request.time_until();
     navi_data->changed = 1;
+    navi_data->previous_msg = navi_data->previous_msg+1;
+    if (navi_data->previous_msg == 8) {
+      navi_data->previous_msg = 1;
+    }
   }
 
   hudmutex.unlock();
@@ -813,4 +821,4 @@ void logUnknownFields(const ::google::protobuf::UnknownFieldSet& fields) {
             break;
     }
   }
-}
+}

mazda/hud/hud.cpp

@@ -35,7 +35,7 @@ uint8_t turns[][3] = {
   {NaviTurns::SHARP_LEFT,NaviTurns::SHARP_RIGHT,0}, //TURN_SHARP_TURN
   {NaviTurns::U_TURN_LEFT, NaviTurns::U_TURN_RIGHT,0}, //TURN_U_TURN
   {NaviTurns::LEFT,NaviTurns::RIGHT,NaviTurns::STRAIGHT}, //TURN_ON_RAMP
-  {NaviTurns::LEFT,NaviTurns::RIGHT,NaviTurns::STRAIGHT}, //TURN_OFF_RAMP
+  {NaviTurns::OFF_RAMP_LEFT,NaviTurns::OFF_RAMP_RIGHT,NaviTurns::STRAIGHT}, //TURN_OFF_RAMP
   {NaviTurns::FORK_LEFT, NaviTurns::FORK_RIGHT, 0}, //TURN_FORK
   {NaviTurns::MERGE_LEFT, NaviTurns::MERGE_RIGHT, 0}, //TURN_MERGE
   {0,0,0},  //TURN_ROUNDABOUT_ENTER
@@ -161,4 +161,4 @@ bool hud_installed()
       loge("DBUS: GetHUDIsInstalled failed %s: %s\n", error.name(), error.message());
       return(false);
   }
-}
+}

mazda/hud/hud.h

@@ -50,7 +50,9 @@ enum NaviTurns: uint32_t {
   FORK_LEFT = 15,
   FORK_RIGHT = 14,
   MERGE_LEFT = 16,
-  MERGE_RIGHT = 17
+  MERGE_RIGHT = 17,
+  OFF_RAMP_LEFT = 7,
+  OFF_RAMP_RIGHT = 30
 };
 
 void hud_start();