In order to realize the purpose of controlling the single chip computer through the upper computer of the PC

and controlling the slave computer through the single chip computer

a multi-machine communication system based on FreeRTOS for STM32F407 chip is designed.The system is based on FreeRTOS real-time operating system

with STM32F407 as the core

the PC upper computer sends information to the single chip computer host through Ethernet

and CAN command the single chip computer host to control the single chip computer slave through CAN bus

to achieve the purpose of multi-machine communication.This paper will analyze and design program software for CAN communication

Ethernet communication and other parts.The experiment results show that the design of the multi-machine communication system can successfully send information to the slave microcomputer and receive the information from the slave microcomputer

can realize the data transmission between multiple control modules

so as to achieve the mutual cooperation between the multi-computer to complete the target task.