With the continuous development of embedded systems
power measurement and control instrument is also a great development. Keyboard and LCD as the intermediary between users and systems are generally used in computer systems. This paper presents a multi-level in the power measurement and control instrument characters displayed in the menu structure design and gives a detailed implementation method. Through the embedded LINUX platform by the C language program written in a vivid demonstration examples
the dot-matrix LCD display and keyboard operation of the software design methodology are revealed.