Merge branch '2.3' into 2.4

# Conflicts:
#	radio/src/fonts/480x272/font_dblsize.png
#	radio/src/fonts/480x272/font_xxlsize.png
#	radio/src/gui/128x64/model_setup.cpp
#	radio/src/gui/128x64/radio_setup.cpp
#	radio/src/gui/480x272/model_receiver_options.cpp
#	radio/src/gui/480x272/model_setup.cpp
#	radio/src/gui/480x272/radio_calibration.cpp
#	radio/src/gui/480x272/radio_hardware.cpp
#	radio/src/gui/common/stdlcd/draw_functions.cpp
#	radio/src/gui/gui_common.cpp
#	radio/src/keys.h
#	radio/src/lua/interface.cpp
#	radio/src/pulses/afhds3.h
#	radio/src/rtos.h
#	radio/src/switches.cpp
#	radio/src/targets/common/arm/stm32/aux_serial_driver.cpp
#	radio/src/targets/horus/CMakeLists.txt
#	radio/src/targets/horus/lcd_driver.cpp
#	radio/src/targets/horus/startup_stm32f42_43xxx.s
#	radio/src/targets/taranis/CMakeLists.txt
#	radio/src/telemetry/crossfire.h
#	radio/src/telemetry/multi.cpp
#	radio/src/translations.cpp
#	radio/src/translations/it.h.txt
#	radio/src/translations/untranslated.h
#	radio/util/font2png.py
#	tools/commit-tests.sh

radio/src/telemetry/crossfire.cpp

@@ -184,6 +184,25 @@ void processCrossfireTelemetryFrame()
       break;
     }
 
+    case RADIO_ID:
+      if (telemetryRxBuffer[3] == 0xEA    // radio address
+          && telemetryRxBuffer[5] == 0x10 // timing correction frame
+          ) {
+
+        uint32_t update_interval;
+        int32_t  offset;
+        if (getCrossfireTelemetryValue<4>(6, (int32_t&)update_interval) && getCrossfireTelemetryValue<4>(10, offset)) {
+
+          // values are in 10th of micro-seconds
+          update_interval /= 10;
+          offset /= 10;
+
+          TRACE("[XF] Rate: %d, Lag: %d", update_interval, offset);
+          getModuleSyncStatus(EXTERNAL_MODULE).update(update_interval, offset);
+        }
+      }
+      break;
+
 #if defined(LUA)
     default:
       if (luaInputTelemetryFifo && luaInputTelemetryFifo->hasSpace(telemetryRxBufferCount-2) ) {