High-speed serial port communication method used for multi-type interface heterogeneous interconnection

Abstract

The invention belongs to the technical field of asynchronous serial communication and discloses a high-speed serial port communication method used for multi-type interface heterogeneous interconnection. According to the method, a sending unit and a reception unit are achieved in an FPGA, wherein the sending unit consists of a sending shift register, a sending data buffer area, a local gating switch, a channel state register and a channel number register, and the reception unit includes a receiving gating switch, a sampling clock counter, a receiving shift register and a receiving data buffer area. The method is characterized in that the communication method includes a sending part and a reception part and has the advantages of simple design, low power consumption, high efficiency, high reliability and high flexibility; compared with an Ethernet, a PCI Express and an RAPIDIO protocol, the method can effectively reduce the complexity of control information during information transmission; compared with RS-422 and a CAN, the method has the advantages of high flexibility and a higher transmission speed rate.

Description

technical field [0001] The invention belongs to the technical field of asynchronous serial communication, in particular to a high-speed serial communication method for multi-type interface heterogeneous interconnection, which is suitable for serial communication with high data rate, reliability and flexibility requirements. Background technique [0002] With the increasing complexity of embedded systems, the reliability and transmission efficiency of multi-type interface heterogeneous interconnection systems are becoming more and more important; in the process of multi-type interface heterogeneous interconnection, information exchange mostly adopts asynchronous differential serial communication There are generally two ways to implement this method, one is to realize asynchronous serial communication through FPGA internal logic, and the other is to use an external serial communication chip; although the method of external serial communication chip programming is now It is sim...

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Problems solved by technology

[0003] There are many asynchronous serial data transmission methods in embedded systems, such as Ethernet, high-speed peripheral component interconnection standard expansion (PCI Express) and high-speed serial input and output interface (SerialRAPIDIO) based on serial deserialization technology. Serial standards, although the data transmission rate is high, consume a lot of resources, the protocol is complex and the transmission efficiency is low; while RS-422, RS-422, CAN and other low-speed standards, although the protocol is simple, the transmission distance is long, and the networking is convenient, but The communication rate is low, the flexibility of multi-point communication is limited and there are no good data flow control measures, so it is mostly used in industrial control occasions

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