Research Of PROFIBUS-DP Slave Station Interface Based On FPGA

PROFIBUS technology is a hot pot in the current field of control technology. The application and research of PROFIBUS-DP technology have been fully-fledged abroad, but it is mainly in unitized device from big corporations such as Siemens, using the MCU(Micro Controller Unit)+Firmware control the PROFIBUS-DP have been fully-fledged. But the independent research and development are lacked. According to this the slave station interface system based on FPGA technology is presented after the theory about PROFIBUS-DP technology is analyzed. Then the slave stations which have the RS-232 interface can communicate with the PROFIBUS master station.PROFIBUS technology is introduced first, including its technology features, protocol structure, transmission technology and protocol access. Then introduce the PRODIBUS-DP components and configuration of the system, the way of working, data transmission, fuction of DP and status mechanism of slave station.Then the hardware and software realization of the communication interface based on PROFIBUS-DP is discussed. According to the detailed function of interface chip SPC3, applying the EDA (Electronic Design Automation) Top-Down designing method to put forward the total design scheme PROFIBUS interface. Then make sure the universal interface by a selectsignal, and also gives the design, simulation and test of the important modules. The commonality and expansibility of the hardware is also considerated.The design is described by VHDL, synthesis by synplify and realized on the FPGA (Field ProgrammableGate Array) chip EP1C6. In the software design, the realization of software is introduced in detail, including the realization of state machine and all kinds of messages and GSD file and so on.The CP5611 network interface of Siemens company and PC compose the master station, using the COMPROFIBUS software, for test the slave station interface and get good result.