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摘要:An IoT(Internet of Things) system is a multi-machine system composed of a master controller and multiple slave controllers. In some automatic control systems such as petroleum and electric power, the main control uses UART(Universal Asynchronous Receiver/Transmitter) to communicate with the slave controller. However, the communication rate of the UART interface is limited and the delay time is long, which affects the system’s response to external events. In order to improve the response speed of the system to external events, this paper designs a multi-machine system based on SPI(Serial Peripheral Interface) interface. First, we use the SPI interface of the microcontroller to build a communication network. The circuit structure of the system is simple, and the hardware resource consumption is low. Then, for the problem that the SPI interface cannot detect communication errors and there is no response mechanism, we designed a communication protocol to make up for these defects from the software level. Finally, we use STM32 F429 IGT6 as the master controller and STM32 F103 C8 T6 as the slave controller to build the experimental platform. The experimental results show that the system is safe and reliable, and can meet the requirements of real-time applications.
会议名称:

The 10th International Conference on Computer Engineering and Networks(CENet2020)

会议时间:

2020-10-16

会议地点:

中国陕西西安

  • 专辑:

    信息科技

  • 专题:

    电信技术; 计算机软件及计算机应用

  • DOI:

    10.26914/c.cnkihy.2020.037237

  • 分类号:

    TP391.44;TN929.5

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