feat: improve debug handling (#5039)

radio/src/CMakeLists.txt

@@ -532,6 +532,14 @@ set_target_properties(firmware PROPERTIES EXCLUDE_FROM_ALL TRUE)
 if(DEBUG)
   target_compile_definitions(firmware PRIVATE -DDEBUG)
   target_compile_definitions(stm32_drivers_w_dbg_fw PRIVATE -DDEBUG)
+  if(DEBUG STREQUAL RTT)
+    add_definitions(-DDEBUG_SEGGER_RTT)
+  endif()
+  if(DEBUG STREQUAL RTT_NO_USB)
+    add_definitions(-DDEBUG_SEGGER_RTT)
+    add_definitions(-DDEBUG_DISABLE_USB)
+  endif()
+
 endif()
 
 target_link_options(firmware PRIVATE

radio/src/targets/common/arm/stm32/usb_driver.cpp

@@ -62,6 +62,10 @@ void setSelectedUsbMode(int mode)
 #if defined(USB_GPIO_PIN_VBUS)
 int usbPlugged()
 {
+#if defined(DEBUG_DISABLE_USB)
+  return(false);
+#endif
+
   static uint8_t debouncedState = 0;
   static uint8_t lastState = 0;