Terminal Based On Arm Embedded Wireless Ordering System Research And Design

Wireless electronic ordering system is an important part of restaurant information management system. The application of this system will not merely bring the good economic benefits to food and beverage enterprise, and is favorable to the advanced science and technology popularization and application in national economy, bring good social benefit. A glance at order-dish system appearing in native market, there have been many products belonging high or low rank, but they aren't introduced in restaurants widely. It can be speculated that scarcity of medium system satisfying china society is the main reason. In this thesis, it analyses characteristic of all kinds of order-dish systems, and concludes that the primary difference among so many system is the implement method of order-dish terminal. Based on this conclusion, it put forward a appropriate solution ranking in medium class: building the wireless order-dish terminal by using embedded system technologies and transmitting data by using short distance wireless communication.Firstly, we analyzed the system constitution and function assignments of wireless electronic ordering system, and designed the total scheme and each hardware module of the system. Secondly, we proposed a new method of data rectification based on analyzing the whole process of data collection and studying the main influential factors of the precision of touch screen coordinate location. Then, we decided to adopt single RF chip technology to implement wireless data transmit function, after comparing several short distance wireless communication methods. The structure of data frame and hierarchical communication protocol were explained in detail, communication mode uses the way of main module querying and slave module listening. Finally, the integrative software design was presented, the whole process is composed of two steps: 1. After discussing the transplantation ofμC/OS-II opening system and the design of Boot Loader startup code, we transplanted and downloaded it to S3C44B0X successfully 2. We described the design of ordering interface, communication protocol and critical driver based on theμC/OS-II opening system.The design has reference and practical value to embedded systems development in the embeddedμC/OS-II opening system environment. Meanwhile, it has a market prospects and practical value, since it is portable and be used to support a variety of wireless Internet occasions.