Scientific grade ccd gigabit ethernet communication system and method based on ax88180

Abstract

The invention relates to an AX88180-based scientific-grade CCD Gigabit Ethernet communication system and method and the problem of loss of image data collected by equipment caused by communication congestion or even collapse in a 100-mega network in an existing image transmission system is solved. The system comprises a network communication circuit board and an FPGA circuit board. The FPGA circuit board comprises an FPGA chip, an EEPROM chip and an SDRAM chip. The FPGA chip and the EEPROM chip are connected according to an IIC protocol, and the SDRAM chip is connected to the FPGA chip for data storage. The network communication circuit board comprises an MAC layer chip, a PHY layer chip and an RJ-45 interface connected in sequence. The MAC layer chip is AX88180, and the PHY layer chip is88E1111. The data collected by the FPGA chip is transmitted to the MAC layer chip and the PHY layer chip and is transmitted a PC upper computer through the RJ-45 interface. The FPGA chip includes a network initialization module, a packet unpacking module, a network protocol module, a command parsing module, a control scheduling module and an EEPROM parameter access module. The invention also provides a method for realizing scientific-grade CCD Gigabit Ethernet communication based on the above system.

Description

technical field [0001] The present invention relates to the field of high-speed image transmission and control systems, in particular to a scientific grade CCD Gigabit Ethernet communication system and method based on AX88180. The system and method control the AX88180 chip and PHY layer chip through FPGA to realize Gigabit Ethernet communication , and run the communication scheme of the communication protocol inside the FPGA. Background technique [0002] In scientific research, objects are often observed and quantitatively analyzed under low-light conditions. At this time, instruments and equipment with high sensitivity, low noise, high linearity, and large dynamic range are required to collect and process image data, and image data acquisition Whether it can be timely and accurately transmitted to the PC host computer will directly affect the practicability, reliability and image data index of the image acquisition equipment. In addition, some observation conditions may e...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of communication blockage or even collapse in the existing 100M network in the existing image transmission system, resulting in the loss of image data collected by the equipment, and to provide a scientific grade CCD Gigabit Ethernet communication system based on AX88180 and The method, the system and method can realize the interconnection between the scientific grade CCD and the PC upper computer through a gigabit network, can transmit the image data collected by the scientific grade CCD to the PC upper computer at high speed, and can realize the control command reception of the PC upper computer , command analysis, command processing, command return, and can realize UDP, ARP, ICMP (realize ping function) and other network protocols, and can check whether the network is blocked by sending heartbeat packets, and make corresponding processing

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