| Embedded system is one of the fastest developped technology in recent years. The rapid rise of the embedded technology, the improvement of application function and design complexity of system are very important to the numerical control of our country. The design and implementation of the software and hardware of the embedded CNC system based on ARM and the research on the control method of the motion control chip are the main tasks of this paper.In this paper, the embedded technology and the numerical control technology are analyzed, and the software and hardware platform of the embedded CNC system is determined. Hardware platform based on ARM7 series microprocessor S3C2440 is selected to be the core, in which arm subsystem is mainly responsible for operation of the CNC system control software and achieve the procedures as well as command input, display of the graphical interface and communication, based on programmable logic device to realize fine interpolator and the necessary peripheral circuits. The system software platform adopts the embedded real-time operating system ?C/OS- II which is open source code, and the task of the software module of the CNC system is divided and the communication and coordination mechanism between each task module is divided.Secondly, the software and hardware development tools and debugging methods of the system are introduced. Software and hardware test results show that the embedded CNC system can meet the expected target. Debugging results show that the hardware platform not only has performances of fast response speed, low cost, good reliability, but also has good portability and scalability. And the system is easy to expand and reduce the function according to the actual needs. The design of the hardware platform of the numerical control system has achieved the expected goal.Finally, the author makes a summary of the research content of this paper, and looks forward to the development of Embedded CNC system based on ARM. |
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