I^2C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 I^2C bus technology in I/O port expansion of ship energy management system

[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。[方方法]将STM32F407作为微控制器,设计基于I^2C总线的双级隔离系统,建立高级精简指令集机器(ARM)、I^2C总线与扩展I/O端口芯片的硬件架构。通过软件模拟I^2C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I^2C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。

[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 I^2C bus,the topology constructed via the Advanced RISC Machine(ARM),I^2C bus and I/O expander chip,and the I^2C 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 I^2C 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.