feat: iFlight Commando 14 support (#7494)

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Co-authored-by: Peter Feerick <5500713+pfeerick@users.noreply.github.com>

radio/src/gui/colorlcd/boot_lcd.cpp

@@ -123,7 +123,6 @@ void lcdInitDisplayDriver()
 
   // Init hardware LCD driver
   lcdInit();
-  backlightInit();
 
   init_lvgl_disp_drv();
 
@@ -144,6 +143,12 @@ void lcdInitDisplayDriver()
   lv_draw_ctx_t* draw_ctx = disp_drv.draw_ctx;
   lcd->setDrawCtx(draw_ctx);
   lcdFront->setDrawCtx(draw_ctx);
+
+#if defined(LCD_BACKLIGHT_INIT_DELAY_MS)
+  delay_ms(LCD_BACKLIGHT_INIT_DELAY_MS);
+#endif
+
+  backlightInit();
 }
 
 void lcdClear() { lcd->clear(); }

radio/src/gui/colorlcd/radio/radio_setup.cpp

@@ -809,7 +809,7 @@ const static SetupLineDef setupLines[] = {
       new ToggleSwitch(parent, {x, y, 0, 0}, GET_SET_INVERTED(g_eeGeneral.dontPlayHello));
     }
   },
-#if defined(PWR_BUTTON_PRESS)
+#if defined(PWR_BUTTON_PRESS) && !defined(PWR_BUTTON_MANAGED)
   {
     // Pwr Off Delay
     STR_DEF(STR_PWR_OFF_DELAY),
@@ -823,7 +823,8 @@ const static SetupLineDef setupLines[] = {
           });
     }
   },
-
+#endif
+#if defined(PWR_BUTTON_PRESS)
   // Pwr Off If Inactive
   {
     STR_DEF(STR_PWR_AUTO_OFF),

radio/src/gui/gui_common.cpp

@@ -960,6 +960,19 @@ bool isExternalModuleAvailable(int moduleType)
     return false;
 #endif
 
+#if defined(EXTMODULE_USART) && !defined(EXTMODULE_TIMER)
+  // Serial external bay with no PPM timer (e.g. C14, S.PORT-only): restrict to
+  // the protocols that run over the half-duplex telemetry line.
+  switch (moduleType) {
+    case MODULE_TYPE_NONE:
+    case MODULE_TYPE_CROSSFIRE:
+    case MODULE_TYPE_GHOST:
+      break;
+    default:
+      return false;
+  }
+#endif
+
 #if !defined(HARDWARE_EXTERNAL_MODULE_SIZE_SML)
   if (isModuleTypeR9MLite(moduleType) || moduleType == MODULE_TYPE_XJT_LITE_PXX2)
     return false;