| PROF1BUS is an international open field bus standard, widely used in manufacturing automation, process industry automation,and buildings, transportation, electric power and other areas of automation. PROFIBUS-DP is important component of PROF1BUS. PROFIBUS-DP is used for high speed data transfer in device-level.Central controllers communicate with dispersion field equipment over a high-speed serial lines.PROFIBUS-DP master(class two) can achieve acyclic communication, configuration and diagnostics of intelligent field devices. Therefore, Design of PROFIBUS-DP master(class two) helps maximize the advantages of PROFIBUS-DP bus technology and reduce project cost. Have positive significance and it’s engineering significance It has important significance in reality and engineering.By the detail agreement of PROFIBUS-DP profile, this article come up with overall design of PROFIBUS-DP master(class two).In section of hardware, STM32F103ZE chip is the kernel of PROFIBUS-DP protocol stack, ASPC2chip is core for media access control. The paper designs the STM32F103ZE and its peripheral circuits, ASPC2interface circuits, master user interface circuits, as well as PROFIBUS-DP master(class two) and DP bus interface circuit. Software complete and implement the master protocol chip interface software, services of fieldbus data link, management services, DDLM sevises and acyclic data communication services. And then it is transplanted on embedded operating systems μC/OS-Ⅱ, which is multi-tasking and in real time. So that the whole system has better real-time performance.This design of PROFIBUS-DP master(class two)has passed the enterprise testing, which demonstrate the reliability and integrity of the design of hardware and software. The main function of the product in accordance with the design requirements and get preliminary applications. |
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