feat: non inverted SBUS trainer support on serial inputs on H5/H7 (#7133)

radio/src/serial.cpp

@@ -218,6 +218,7 @@ static void serialSetCallBacks(int mode, void* ctx, const etx_serial_port_t* por
 #endif
 
   case UART_MODE_SBUS_TRAINER:
+  case UART_MODE_SBUS_TRAINER_INV:
     sbusSetReceiveCtx(ctx, drv);
     if (drv && drv->setIdleCb) {
       drv->setIdleCb(ctx, sbusAuxFrameReceived, nullptr);
@@ -317,6 +318,13 @@ static void serialSetupPort(int mode, etx_serial_init& params)
     params.direction = ETX_Dir_RX;
     break;
 
+  case UART_MODE_SBUS_TRAINER_INV:
+    params.baudrate = SBUS_BAUDRATE;
+    params.encoding = ETX_Encoding_8E2,
+    params.direction = ETX_Dir_RX;
+    params.polarity = ETX_Pol_Inverted;
+    break;
+
 #if defined(LUA)
   case UART_MODE_LUA:
     params.baudrate = LUA_DEFAULT_BAUDRATE;