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研究实现了一种HDLC(High Level Data Link Control)协议的改进方法,该方法把HDLC协议传统的同步传输方式改成了异步传输方式,既保留了原有HDLC协议的主要优点,又增强了传输数据的抗干扰性能,并节省了通信系统的同步时钟接口连线。文中简要介绍了HDLC的协议规程,并提供了CRC及删“0”部分的VHDL代码。最后,描述了HDLC协议的异步传输方式,并通过FPGA完成了HDLC协议的改进。
This paper researches and develops an improved method of HDLC (High Level Data Link Control) protocol, which changes the traditional synchronous transmission mode of HDLC protocol to asynchronous transmission mode, not only retains the main advantages of the original HDLC protocol, but also enhances the transmission Data anti-jamming performance, and save the communication system synchronization clock interface connection. This article briefly describes the HDLC protocol, and provides the CRC and delete “0” part of the VHDL code. Finally, the asynchronous transmission of HDLC protocol is described, and the improvement of HDLC protocol is completed by FPGA.