Software reuse technology can efficiently and cost-effectively build embedded CNC systems to meet the current needs of the manufacturing industry. In view of the characteristics of embedded systems, an embedded hierarchical architecture is proposed and the component model of the embedded CNC system under this structure is described in detail. Keywords: embedded CNC system; component; software reuse The high-speed, intelligent, networked, integrated and open characteristics of modern CNC systems make CNC systems based on single-chip microcomputers no longer suitable for the development and needs of modern CNC. However, due to the versatility of structure and performance, the application advantages of PC-based CNC systems in modern CNC systems are not obvious. On the other hand, with the development of microelectronics technology, the reliability and application level of microprocessors as hardware carriers of embedded systems are getting higher and higher, and the number of integrated components is increasing, and the functions are becoming more and more powerful. Not only is the power consumption getting lower and lower, but it is also increasingly combined with analog circuits. The distance between embedded microprocessors and PC systems is getting smaller and smaller, and the application advantages in some occasions are getting greater and greater. At the same time, the compactness of the structure, high reliability, integration, real-time performance, high adaptability to harsh working environments, unified programming interface, and powerful network communication capabilities of embedded microprocessors and embedded systems all meet the needs of modern CNC. Embedded software is the soul of embedded systems, responsible for the allocation, scheduling and control of all resources of embedded systems. The development of embedded systems focuses on the development of embedded software. However, the defects of life cycle-based software development technology have long plagued embedded software developers, such as: long overall development cycle, low modularity, poor reusability, poor portability, and high maintenance costs. Therefore, shortening the software development cycle, reducing development and maintenance costs, and improving software quality are urgent requirements for embedded software developers, and are also requirements for embedded software to adapt to the rapid development of embedded technology and the rapid expansion of application fields today. Software reuse is an effective way to improve software quality and development efficiency, and is one of the hot spots in current software development research.
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