摘要：In embedded system, man-machine command system is the main way for people to use the system. The command in man-machine system often needs upgrade. It is a hard work to upgrade the old command with the new version of the command. A novel man-machine command system proposed in this paper can be used to upgrade the command system in a smooth way. The method comprises: split the embedded system into different operating states, provide two command versions (old version and new version), and attach different privileges according to system operating states and command version. According to the current operating status of the system and the privilege of the command, it is determined whether or not to execute the command and whether or not prompt information about the command to be upgraded should be shown to the user. By using the method proposed in this paper embedded software can be a smooth upgrade. The old version command can continue to use, and the progress of the new version command replacing old version command will be a smooth progress.
关键词：Man-machine command; Smooth upgrade; System state
