ArduPlane: Support for OLED display by Alexey Kozin

https://github.com/ArduPilot/ardupilot/pull/5135

ArduPlane/GCS_Mavlink.cpp

@@ -2181,6 +2181,7 @@ void Plane::gcs_update(void)
 void Plane::gcs_send_text(MAV_SEVERITY severity, const char *str)
 {
     GCS_MAVLINK::send_statustext(severity, 0xFF, str);
+    notify.send_text(str);
 }
 
 /*
@@ -2196,6 +2197,7 @@ void Plane::gcs_send_text_fmt(MAV_SEVERITY severity, const char *fmt, ...)
     hal.util->vsnprintf((char *)str, sizeof(str), fmt, arg_list);
     va_end(arg_list);
     GCS_MAVLINK::send_statustext(severity, 0xFF, str);
+    notify.send_text(str);
 }
 
 /*

ArduPlane/sensors.cpp

@@ -123,6 +123,9 @@ void Plane::read_battery(void)
         battery.exhausted(g.fs_batt_voltage, g.fs_batt_mah)) {
         low_battery_event();
     }
+    if (battery.get_type() != AP_BattMonitor::BattMonitor_TYPE_NONE) {
+        AP_Notify::flags.battery_voltage = battery.voltage(); //for on-board oled display
+    }
     
     if (should_log(MASK_LOG_CURRENT)) {
         Log_Write_Current();

ArduPlane/system.cpp

@@ -324,6 +324,7 @@ void Plane::set_mode(enum FlightMode mode, mode_reason_t reason)
         // don't switch modes if we are already in the correct mode.
         return;
     }
+    AP_Notify::flags.flight_mode = mode; //for on-board oled display
     if(g.auto_trim > 0 && control_mode == MANUAL)
         trim_control_surfaces();