[taranis] trainer detection and main view icons

src/taranis/board_taranis.h

@@ -84,7 +84,8 @@ uint8_t usbPlugged(void);
 #define BOOTLOADER_REQUEST() (0)
 #define usbBootloader()
 
-#define SLAVE_MODE()         (0/*pwrCheck() == e_power_trainer*/)
+#define SLAVE_MODE()         (g_model.trainerMode == 1)
+#define TRAINER_CONNECTED()  (GPIO_ReadInputDataBit(GPIOTRNDET, PIN_TRNDET) == Bit_RESET)
 
 void delaysInit();
 

src/view_main.cpp

@@ -263,11 +263,11 @@ void displayTopBar()
     x -= 12;
   }
 
-  if (SLAVE_MODE()) {
+  if (TRAINER_CONNECTED() && SLAVE_MODE()) {
     LCD_NOTIF_ICON(x, ICON_TRAINEE);
     x -= 12;
   }
-  else if (0) {
+  else if (TRAINER_CONNECTED() && !SLAVE_MODE()) {
     LCD_NOTIF_ICON(x, ICON_TRAINER);
     x -= 12;
   }