支持生成bin文件，为bootloader做准备

CMakeLists.txt

@@ -70,3 +70,10 @@ target_link_libraries(${CMAKE_PROJECT_NAME}
 	main
     # Add user defined libraries
 )
+
+add_custom_command(TARGET ${CMAKE_PROJECT_NAME} POST_BUILD
+    COMMAND ${CMAKE_OBJCOPY} -O binary 
+        $<TARGET_FILE:${CMAKE_PROJECT_NAME}> 
+        ${CMAKE_PROJECT_NAME}.bin
+    COMMENT "正在生成 ${CMAKE_PROJECT_NAME}.bin 文件..."
+)