Abnormal reset system protection method and reset protection system

Abstract

The invention relates to a system protecting method for abnormal reset and a reset protecting system, and the method comprises the steps of: 1. when system abnormal reset occurs, automatically capturing system hardware reset by the reset protecting system and not distributing the reset to a processor; 2. the reset protecting system utilizes the hardware reset to trigger to make system protection operations; 3. when all system protection operations end, the reset protecting system releases the captured hardware reset and triggers the processor to reset. And the invention avoids harddisk damage caused by abnormal reset and assures the system bus is not occupied by asynchronous reset as reset. Besides, it can store abnormal information, convenient to collect data about reset problem difficult to reproduce as debugging a device and quickly locate repeated restart failure.

Description

technical field [0001] The invention relates to a system protection method for abnormal reset and a reset protection system, which are suitable for communication, network and other related fields. Background technique [0002] With the development of the communication industry, the functions and performance of communication products are becoming more and more perfect, and people's requirements for the reliability of communication products are becoming more and more stringent. At the same time, the complexity and system integration of the communication system are getting higher and higher, and it is becoming more and more difficult to locate errors when the system fails. [0003] When a system failure occurs, in order to quickly recover from the failure state, a watchdog is generally used to monitor the system's operating status. The output pin of the watchdog is connected to the reset pin of the processor. When the system is running normally, the software will reset the tim...

AI Technical Summary

Problems solved by technology

[0004] (1) If there are mechanical structural devices such as hard disks in the system, such devices need to perform operations such as partition table synchronization during normal data access. buffer, if the system resets abnormally, the synchronization operation of the partition table cannot be completed, and the data in the buffer cannot be written to the hard disk in time. Causing the system to fail to provide services normally

[0005] (2) Some asynchronous reset devices in the system, such as IIC devices, etc., when these devices occupy the system bus, if an abnormal system reset occurs, these devices will always occupy the system bus because they cannot know the arrival of the reset, resulting in the system after reset. can't start normally

[0006] (3) The abnormal reset of the system directly causes the contents of the registers of all chips in the entire system to return to the initial values, and the information stored in the system data cache is also cleared. In this way, various status information when the system fails are not recorded. And this information is an important clue for the abnormal reset of the positioning system, which caused great difficulty for the fault of the positioning system after the event

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