Design Of CAN Bus Communication Node Based On STM32

STM32-based CAN bus communication node can make the hardware circuit design more concise,compact,but also improve the flexibility and reliability of data transmission.CAN bus has the advantages of high real-time performance and good stability.It is widely used in various industrial fields.This paper designs a gas detection node based on STM32 microcontroller and CAN bus communication protocol to meet the needs of different industrial occasions requirements for microcontrollers and data transmission bus performance and features.First of all,this paper takes the 32-bit ARM processor STM32 based on the Cortex-M3 core,and realizes the real-time data transmission of the modern industrial network,and uses the CAN bus to communicate the data collected by each gas concentration collection node Secondly,the basic peripheral circuit based on STM32 microcontrollers,key,gas collection circuit,LCD1602 liquid crystal display circuit and alarm circuit design including LED lamp and buzzer are completed.The design of the communication node is based on the structure design of the communication node,hardware circuit design and software design.Finally,the actual CAN bus communication node is used to debug the actual data transmission test,which verifies the feasibility and reliability of communication between nodes.The experimental results show that the system architecture is correct and the inter-node communication function is achieved to achieve the expected design purpose.