OSD: add VTX power indicator

Complement to iNavFlight#4717. It is now possible to change the VTX power setting
in flight. This allows to see what power the VTX is set at and also when
the VTX power RC adjustment is active.

Author: shellixyz

src/main/cms/cms_menu_osd.c

@@ -258,6 +258,8 @@ static const OSD_Entry menuOsdElemsEntries[] =
     OSD_ELEMENT_ENTRY("BARO TEMP", OSD_BARO_TEMPERATURE),
 #endif
 
+    OSD_ELEMENT_ENTRY("VTX POWER", OSD_VTX_POWER),
+
 #ifdef USE_TEMPERATURE_SENSOR
     OSD_ELEMENT_ENTRY("SENSOR 0 TEMP", OSD_TEMP_SENSOR_0_TEMPERATURE),
     OSD_ELEMENT_ENTRY("SENSOR 1 TEMP", OSD_TEMP_SENSOR_1_TEMPERATURE),

src/main/io/osd.c

@@ -61,6 +61,7 @@
 #include "io/flashfs.h"
 #include "io/gps.h"
 #include "io/osd.h"
+#include "io/vtx.h"
 #include "io/vtx_string.h"
 
 #include "fc/config.h"
@@ -2516,6 +2517,14 @@ static bool osdDrawSingleElement(uint8_t item)
         }
 #endif
 
+    case OSD_VTX_POWER:
+        {
+            tfp_sprintf(buff, "%d", vtxSettingsConfig()->power);
+            if (isAdjustmentFunctionSelected(ADJUSTMENT_VTX_POWER_LEVEL)) TEXT_ATTRIBUTES_ADD_BLINK(elemAttr);
+            displayWriteWithAttr(osdDisplayPort, elemPosX, elemPosY, buff, elemAttr);
+            return true;
+        }
+
     default:
         return false;
     }
@@ -2719,6 +2728,8 @@ void pgResetFn_osdConfig(osdConfig_t *osdConfig)
     osdConfig->item_pos[0][OSD_GFORCE_Y] = OSD_POS(12, 6);
     osdConfig->item_pos[0][OSD_GFORCE_Z] = OSD_POS(12, 7);
 
+    osdConfig->item_pos[0][OSD_VTX_POWER] = OSD_POS(3, 5);
+
 #if defined(USE_RX_MSP) && defined(USE_MSP_RC_OVERRIDE)
     osdConfig->item_pos[0][OSD_RC_SOURCE] = OSD_POS(3, 4);
 #endif

src/main/io/osd.h

@@ -142,6 +142,7 @@ typedef enum {
     OSD_GFORCE_Y,
     OSD_GFORCE_Z,
     OSD_RC_SOURCE,
+    OSD_VTX_POWER,
     OSD_ITEM_COUNT // MUST BE LAST
 } osd_items_e;