| The embedded ethernet's essence is to realize the network in embedded system's foundation,enable the embedded system to realize the network communication protocols and make access to the Ethernet.Unify the embedded system and the ethernet are precisely the current research hot spots.The embedded ethernet technology's main application domain is the industrial control network,namely the industry Ethernet.A variety of intelligent instruments and meters with Ethernet interface are gradually replacing traditional monitoring and control equipment.The thesis is aimed at the data transmission between security inspection CT machine and PC,and ultimately achieve an agreement based on a custom UDP packet loss retransmission mechanism for data transmission,which takes real-time and reliability as the major objective.bases on NiosⅡsoft-core,μC/OS-Ⅱreal-time operating system and NicheStack TCP/IP Stack,uses hardware and software co-design approach.The thesis first detailedly narrates the foundation of embedded Ethernet for NiosⅡsoft-core.namely theμC/OS-Ⅱreal-time operating system and the embedded TCP/IP Stack, then puts forward an overall program for the hardware and software co-design using SOPC technology,and then separately elaborates the realizing process of the embedded Ethernet from the hardware and the software aspect.finally analyzes the realizing effect which through the software and hardware experiment. |
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