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Embedded satellite-borne computer watchdog circuit and working method thereof

An on-board computer and watchdog technology, applied in the field of watchdog circuits, can solve problems such as the failure of the watchdog clearing operation and the reduction of software operating efficiency, so as to reduce the number of clearing operations, reduce the number of operations, and improve the The effect of operating efficiency

Active Publication Date: 2020-06-19
XIAN MICROELECTRONICS TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the watchdog clearing operation adopts pulse mode, the system software needs to perform two write operations to complete one clearing operation (such as figure 2 As shown), there is also the risk that the watchdog clearing operation may fail after the two write operations are interrupted, which reduces the operating efficiency of the software

Method used

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  • Embedded satellite-borne computer watchdog circuit and working method thereof
  • Embedded satellite-borne computer watchdog circuit and working method thereof
  • Embedded satellite-borne computer watchdog circuit and working method thereof

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

[0029] Such as image 3 As shown, the embedded star-borne computer watchdog circuit disclosed by the present invention includes a watchdog counting circuit, a dog clearing pulse width generating circuit, a dog bite counting circuit, a clearing watchdog signal combining logic circuit and a resistance-capacitance network; The input terminal CLR of the clear dog pulse width generating circuit communicates with the application software for writing operation of the application software; the output terminals of the clear dog pulse width generating circuit are respectively connected to the input terminals of the logic circuit for clearing the watchdog signal through a jumper wire The output end of the combination logic circuit for clearing the watchdog signal is connected with the dog bite times cou...

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Abstract

The invention particularly discloses an embedded satellite-borne computer watchdog circuit. The watchdog circuit comprises a watchdog counting circuit, a dog clearing pulse width generation circuit, adog biting frequency counting circuit, a watchdog clearing signal merging logic circuit and a resistance-capacitance network, a dog feeding end of the dog clearing pulse width generation circuit communicates with the application software and is used for writing operation of the application software; the output ends of the dog clearing pulse width generation circuits are connected with the input end of the watchdog clearing signal merging logic circuit through jumper wires respectively, and the output end of the watchdog clearing signal merging logic circuit is connected with the dog bite frequency counting circuit through the watchdog counting circuit. And the resistance-capacitance network is connected with the watchdog counting circuit. The dog clearing pulse width generation circuit isadditionally arranged in a traditional circuit, watchdog clearing pulses can be output through the dog clearing pulse width generation circuit only by one-time writing operation of software, the watchdog clearing function is achieved, the frequency of dog clearing operation of system software is reduced, and the running efficiency of the software is improved.

Description

technical field [0001] The invention relates to a watchdog circuit, in particular to an embedded star-borne computer watchdog circuit. Background technique [0002] At present, there are relatively mature watchdog circuit designs in my country's embedded on-board computers. The function of the watchdog circuit is mainly to reset the product to the initial state of power-on and restart operation when the product is running abnormally. The traditional onboard computer watchdog circuit design is composed of watchdog counting circuit 54HC4060, dog bite counting circuit 54HC164, clear watchdog signal merge logic circuit, resistance-capacitance network, etc., such as figure 1 shown. Since the watchdog clearing operation adopts pulse mode, the system software needs to perform two write operations to complete one clearing operation (such as figure 2 As shown), there is also the risk that the watchdog clearing operation may fail after the two write operations are interrupted, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/07
CPCG06F11/0757Y02D10/00
Inventor 张毅郭芳余国强石强胜
Owner XIAN MICROELECTRONICS TECH INST
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