I2C总线技术在舰船能量管理系统I/O端口扩展中的应用

Application of I2C bus technology in I/O port expansion of ship energy management system

    摘要
  • 摘要:
      目的  为处理舰船能量管理系统的多个数字量信号，需实时获取并下达多个底层被控电站的指令与状态信号，进而对各个底层控制器的接触器、继电器、断路器及能量链切换开关依次实施有效的控制。
      方法  将STM32F407作为微控制器，设计基于I2C总线的双级隔离系统，建立高级精简指令集机器（ARM）、I2C总线与扩展I/O端口芯片的硬件架构。通过软件模拟I2C总线时序并利用ARM控制器的2个通用端口，可以方便地扩展128路I/O端口并确保I2C总线的实时性与可靠性。
      结果  ARM控制器能够按照既定的能量管理策略对各个底层控制器的I/O端口进行有效、可靠地扩展与实时控制。
      结论  在工程应用方面，该I/O端口扩展方法具备一定的推广与参考价值。

     

    Abstract:
      Objectives  This paper aims to implement the multiple digital signal processing of ship energy management systems. It achieves the real-time acquisition and delivery of instructions and state signals for multiple power stations, thereby enabling the efficient and sequential control of the relays, indicator lamps and energy chains of power stations.
      Methods  Based on the STM32F407 microcontroller, a double-isolation system is designed for the I2C bus, the topology constructed via the Advanced RISC Machine(ARM), I2C bus and I/O expander chip, and the I2C bus timing imitated by two general purpose I/O ports. This not only easily extends the 128 I/O port but ensures the effectiveness and real time property of the I2C bus.
      Results  This ARM controller can reliably control all the I/O ports of the underlying controllers in real time according to the established energy management strategy.
      Conclusions  This results of this research can be applied to other I/O port expansion engineering practices, giving it high application and promotion value.

     

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