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Safeguard device and safeguard interruption prewarm method

A technology of watchdog and flag signal, applied in watchdog early warning, watchdog device with interrupt early warning function, watchdog interrupt early warning field, can solve problems such as occupation of system resources, data loss, etc., to save system resources , increase flexibility, and avoid data loss

Inactive Publication Date: 2007-02-28
南通江涌投资开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The disadvantage is that the system may be reset without any precautions, resulting in data loss and other problems, and the software in the system must specially set up another counter to periodically clear the watchdog, occupying system resources

Method used

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  • Safeguard device and safeguard interruption prewarm method
  • Safeguard device and safeguard interruption prewarm method

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Embodiment Construction

[0039] According to the watchdog device and the interrupt early warning method provided by the present invention, through the interrupt early warning function, and further adopt programmable watchdog counter and watchdog reset selection, the system can reset.

[0040] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0041] Fig. 1 is a schematic diagram of an embodiment of a watchdog device with an interruption early warning function provided by the present invention. As shown in FIG. 1 , the device includes a latch 110 , a control unit 120 and a counting unit 130 .

[0042] The latch 110 includes a target value latch unit 111 and an interrupt existence flag signal latch unit 112 .

[0043] The target value latch unit 111 is used to store a preset target value. The preset target value can be an unchangeable fixed valu...

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Abstract

The invention relates to a door dog device with alarm function, wherein said device comprises latch, counter, and controller; when the counter reaches the target value preset in latch, it can alarm to the system via interruption alarm signal, and send out interruption mark signal to the controller, therefore, the system can based on alarm signal store and copy the system data, to avoid data loss and error caused by system reset without alarm function; in addition, the zero of door dog can be processed by several methods as hardware reset, software reset and automatic reset, without additional timer in system to periodically reset the door dog, to save system resource and reduce cost.

Description

technical field [0001] The invention relates to a watchdog device, in particular to a watchdog device with an interruption warning function. [0002] The invention also relates to a watchdog early warning method, in particular to a watchdog interrupt early warning method. technical background [0003] A large number of systems with CPU are used in communication, industrial control, automation and other fields, so the reliability of CPU is an important indicator. In order to avoid crashes or crashes due to unexpected events or programming errors, people have designed a watchdog, which can effectively prevent the system from entering an infinite loop or programs from running away. [0004] The main working module of the current watchdog is a timer. During normal operation, the system will clear the counter of the watchdog at regular intervals, so that the counter cannot reach the predetermined target value. And once the system does not clear the counter of the watchdog with...

Claims

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Application Information

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IPC IPC(8): G06F11/00
Inventor 余娜敏
Owner 南通江涌投资开发有限公司
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