Embedded CNC system with the μc/os-Ⅱ OS
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摘要: 介绍了嵌入式数控系统的结构及其组成.系统硬件平台采用嵌入式微控制器ARM(Advanced RISC Machines)和现场可编程门阵列FPGA(Field Programmable Gate Arrays),软件平台采用μc/os-Ⅱ实时操作系统.给出了该系统的硬件结构.根据数控系统的软件需求,给出了系统的软件结构,系统的模块,任务以及任务的优先级和周期.同时给出了实现系统的一些关键技术.在嵌入式实时操作系统μc/os-Ⅱ上实现了该系统,在数控机床上进行了加工试验、环境适应能力测试以及静电放电抗干扰试验,试验表明系统稳定可靠.Abstract: An embedded CNC(computer numerical control) system and its hardware and software platform are presented. The system hardware consists of microcontroller ARM(advanced RISC machines) and FPGA(field programmable gate arrays). The CNC system application runs on the ARM, while FPGA is used to connect IO and generate pulses. The software platform utilizes the μc/os-Ⅱ OS to provide hard real time capabilities. The CNC controller software architecture which applies a generic open architecture model with a software bus is presented. Some important methods for carrying out the implementing of the CNC controller are researched and demonstrated, including thread cutting. Finally, a real machining experiment on the system mentioned above is introduced. The result shows that it can be successfully used in real manufacturing environment.
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