Research And Realization Of Ethernet Technology In The DSP System

Along with development and popularization of communication technology,network technology and Semi-conductor technology,the case of embemded technology combining with network technology has become very mature.To realize long-distance control, maintenance and trouble diagnosis based on appliance wiring, industrial control equipment or the instrument, safety supervises and control system, car electronics etc,network has become a important trend of the development of embeded system.A method ,which achieved the connection of DSP system with Ethernet interface and Internet,is given in this paper.The Ethernet interface module is made up of 8 bit MCU and network card chip RTL8019AS. DSP system connects with Ethernet by communicating with MCU in the Ethernet interface moduleIn the hardware designation, the circuit of hardware in communication between MCU and DSP and the Ethernet interface module are achieved in this paper.System software designation is introduced in this paper,which is consisit of asynchronous serial communication between DSP and MCU program,the driver of network card and TCP/IP protocol program module.Finally, by testing the system and the analysis of data, the method achieved in this paper can make DSP embedded system connect with Ethernet .So long-distance control and maitanace based on DSP embedded system also come true.