Remote online upgrading method based on CAN (Controller Area Network) bus

Abstract

The invention discloses a remote online upgrading method based on a CAN (Controller Area Network) bus. The remote online upgrading method is based on a CAN bus system; the system comprises a plurality of embedded functional modules which work independently and a control module for upgrading the system; each functional module is provided with a cured guiding program; the guiding program supports a CAN bus protocol; the control module is used for sending an upgrading command to a functional module which is required to be upgraded; and each functional module is used for skipping to the guiding program after receiving the upgrading command, waiting for the control module to transmit an upgrading data packet, transmitting the received upgrading data packet through a serial file transmission protocol Xmodem, programming the received upgrading data packet to Flash to realize online upgrading, performing software resetting operation after the completion of upgrading, and starting to run an upgraded application.

Description

technical field [0001] The invention belongs to the technical field of embedded devices, in particular to a remote online upgrading method based on CAN bus. Background technique [0002] In recent years, with the development of computer technology and integrated circuit technology, embedded technology has become more and more popular, and it plays an increasingly important role in the fields of communication, network, industrial control, medical treatment, and electronics. Embedded systems undoubtedly become one of the hottest and most promising IT application fields at present. With the development of informatization, intelligence and networking, embedded system technology will also gain broad development space. [0003] At present, some advanced PDAs have realized the writing of Chinese characters and voice release of short messages on the display screen, and the scope of daily use will also become wider and wider. For enterprise-specific solutions, such as logistics man...

AI Technical Summary

Problems solved by technology

This method is time-consuming and labor-intensive, which is not conducive to modern production methods and increases unnecessary workload

Therefore, the problem of updating the embedded system program has been perplexing people all the time.

[0005] 1. These systems are located in various positions of the large system, and it is difficult to upgrade each system individually;

[0006] 2. In order to meet the requirements of confidentiality and reliability, some systems have permanently sealed the system, and only reserved communication and power ports, which makes it even more impossible to upgrade it independently

Due to the nature of its bus form, it has the disadvantages of limited load capacity, prone to network paralysis, and low data security, prone to bit errors;

[0009] 2. When updating the program, it is generally necessary to re-power on and reset;

[0010] 3. Generally, professional and technical personnel are required to go to the site to operate the update program, which is not easy to operate;

[0011] 4. The protection mechanism is not perfect. During the update process, when there is a power failure or other reasons, it is easy to cause data loss

[0012] The above problems have greatly increased the workload of the update program and the insecurity when upgrading the program

Images