Method for checking whether external watchdog chip works normally

A technology of watchdog chip and normal operation, which is applied in the direction of error detection/correction, faulty hardware testing method, faulty computer hardware detection, etc. The effect of operating hazards

Pending Publication Date: 2017-01-25
INTEGRATED ELECTRONICS SYST LAB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the industry generally defaults that the chip can work normally, and does not test the function of the chip, which buryes hidden dangers for the normal operation of the product in the later stage.

Method used

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  • Method for checking whether external watchdog chip works normally

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Embodiment Construction

[0024] The specific implementation steps of the present invention are described in detail below in conjunction with the accompanying drawings: a method for detecting whether the external watchdog chip works normally, comprising the following steps:

[0025] Step 1. Initiate a self-test command

[0026] In the data storage area where power-off data will not be lost, open up a storage unit that can be used to write strings S1, S2, and S3. The strings S1, S2, and S3 represent the self-test request flag, self-test success flag, and self-test respectively. invalid flag;

[0027] Initiate a self-test command through an external interactive interface such as a communication port or a button, and write a character string S1 in the storage unit, and enter step 3;

[0028] Step 2. System reset

[0029] Reset the system, read the data content in the storage unit, judge whether the data content of this section is consistent with the character string S1, if it is consistent, change the d...

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Abstract

A method for checking whether an external watchdog chip works normally comprises initiation of a self-check instruction, system resetting, entering of a self-check state, result output and normal operation of the system. Through detection of the watchdog chip, a collector terminal, which cannot work normally, of the chip can be found timely, a fault terminal is prevented from coming into the market, and the potential operation risk of an on-site terminal is eliminated timely.

Description

technical field [0001] The invention relates to the technical field of electricity consumption information collection systems, in particular to a method for detecting whether an external watchdog chip is working normally in a data collection terminal. Background technique [0002] With the continuous advancement of the information transformation of the power system, the use of various collection equipment in the centralized copying system continues to increase. The working environment makes each data acquisition equipment inevitably subject to external electromagnetic field interference. Once encountering serious electromagnetic field interference, it will cause the microprocessor of the acquisition equipment to go down. Watchdog chip, as a chip for system operation status monitoring, plays a vital role in timely wake-up when the system is down. [0003] Due to the influence of factors such as the quality of the chip itself, production welding, etc., the watchdog chip will ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/22G06F11/07
CPCG06F11/2273G06F11/0757G06F11/2236
Inventor 衡泽超贾凯宋忠强薛坤宁晨光郑宝毅王福斌赵长收王春城
Owner INTEGRATED ELECTRONICS SYST LAB
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