Research And Design Of The Embedded HMI Configuration Software

With the development of technology of computer software and hardware, embedded HMI is used in the field of industrial control more and more. HMI configuration software provides a way of architecture in a building block for engineers and technicians to product the scene control process and control interface. A variety of control objects of control system are abstracted in several types of basic graphic elements and components. Configuration software can help us to establish the relationship between them to form a simple, intuitive man-machine interface.HMI configuration software is divided into two parts, PC Configuration Software (PCCS) and Embedded Configuration Software (ECS) . PCCS is used to edit configuration control interface, running on PC, and the ECS redraw the control interface and achieve monitoring, running on embedded device.Such a configuration idea is the same with the concept of object-oriented technology, design patterns based on encapsulation, inheritance and polymorphism of object-oriented. It can help us to solve problems of object-oriented design. The use of design patterns can improve the efficiency and quality of software development.The main work and innovation of the paper reflects in the following aspects:First, design concept of Embedded HMI is proposed, based on the traditional configuration software. The architecture of the embedded HMI hardware and software is analysised, choosing a suitable development platform. Functional requirements of the embedded HMI configuration software are Analysised, dividing function modules reasonable. The design methods of PCCS and ECS are detailed.Second, the embedded system's RAM and file storage space is limited. According to the functional requirements and efficiency considerations, configuration file format is defined to made it easy to read, saving storage space, solving the embedded configuration information' s conversion of embedded HMI.Third, not only the theory how to select and apply design patterns is stuied, but also use the appropriate design patterns in the specific design in accordance with the actual situation and selection method in order to improve software development efficiency, scalability and flexibility.Finally, Embedded HMI functions are tested by application. The results show that the running of the system achieved the desired objective.