With the rapid development of my country\'s economic construction, people\'s living consumption level is getting higher and higher, and new requirements are constantly being put forward for the service quality and service methods of the catering industry. Catering service systems based on computer processing and wireless communication technology have emerged. This paper studies and develops a wireless catering service terminal system based on ARM9, and realizes the wireless ordering function through the operation of the terminal. Based on the reference and reading of a large amount of information, the overall design scheme of wireless communication based on embedded systems as terminals and micro-power short-range wireless communication technology is determined. Embedded systems are low-cost, small in size, low in power consumption and high in reliability. They are an excellent choice for developing catering service terminal systems, and micro-power short-range wireless communication technology is easy to develop and low in cost. Therefore, this project selects ARM embedded development boards and short-range RF wireless data transmission modules as the hardware for developing catering service terminals. This paper configures a cross-compilation environment suitable for embedded system development. In this environment, an embedded Linux operating system based on this platform is developed by configuring the system boot program, cutting the Linux kernel and customizing the root file system. A wireless communication application based on the wireless data transmission module is written in C language. Through data sending and receiving, the wireless transmission of ordering data between the catering service terminal and the server is realized. A graphical user interface of the ordering terminal is designed, and the operator can order dishes on this interface to realize the ordering function. During the development process, the kernel source code, operation and management mechanism of the Linux operating system are deeply studied, and the modification of the startup code and the cutting of the kernel are discussed and developed. The application uses the Linux multi-threading technology of shared memory for function processing, and the thread management problem is analyzed and discussed.
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