modified the bsp files of at32 to make them work better

hw/bsp/at32f402_405/boards/at_start_f405/board.cmake

@@ -3,6 +3,15 @@ set(MCU_LINKER_NAME AT32F405xC)
 
 set(JLINK_DEVICE ${MCU_VARIANT})
 
+set(RHPORT_SPEED OPT_MODE_FULL_SPEED OPT_MODE_HIGH_SPEED)
+
+if (NOT DEFINED RHPORT_DEVICE)
+  set(RHPORT_DEVICE 1)
+endif()
+if (NOT DEFINED RHPORT_HOST)
+  set(RHPORT_HOST 0)
+endif()
+
 function(update_board TARGET)
   target_compile_definitions(${TARGET} PUBLIC ${MCU_VARIANT})
 endfunction()