Hardware watchdog circuit and single-chip microcomputer control system with task sequence monitoring

A technology of task timing and watchdog, which is applied in general control systems, control/regulation systems, program control, etc., can solve problems such as high software complexity and high circuit complexity, to avoid signal misreading, reduce complexity, The effect of improving reliability and safety

Active Publication Date: 2022-04-05
CHINA HANGFA SOUTH IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides a hardware watchdog circuit with task timing monitoring to solve the technical problems of high circuit complexity and high software complexity existing in the existing single-chip microcomputer using BIT test

Method used

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  • Hardware watchdog circuit and single-chip microcomputer control system with task sequence monitoring
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  • Hardware watchdog circuit and single-chip microcomputer control system with task sequence monitoring

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Embodiment Construction

[0036] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in various ways defined and covered below.

[0037] Such as figure 1As shown, the preferred embodiment of the present invention provides a hardware watchdog circuit with task timing monitoring, which is used to monitor the strobe signal of the multi-channel analog switch 20, so as to avoid the problem caused by the multi-channel analog switch 20 not following the sequence. The misreading of the signal caused by the gating will affect the realization of the control function of the single chip microcomputer or cause a malfunction. The hardware watchdog circuit with task timing monitoring includes watchdog circuit 11, memory 13, power-on reset RC circuit 15, 7-bit binary counter 12 and decimal synchronous add / subtract counter 16, and the power-on reset RC circuit 15 is used for being connected with power suppl...

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Abstract

The invention discloses a hardware watchdog circuit with task timing monitoring, which is used to monitor the gating signals of multi-channel analog switches, including a watchdog circuit, a 7-bit binary counter, a memory, a power-on reset RC circuit and Decimal synchronous up / down counter. Compared with the traditional BIT detection, the hardware watchdog circuit and single-chip microcomputer control system with task timing monitoring of the present invention integrate 7-bit binary counters and memory with the watchdog circuit, and will select and communicate with multi-channel analog switches. The comprehensive design of timing monitoring and hardware watchdog circuit not only solves the problem of real-time detection of time-sharing task monitoring, but also reduces software complexity, reduces circuit complexity, and improves system reliability and security. It can avoid signal misreading caused by the strobe signal not being strobed according to the timing, which will affect the realization of the control function or cause malfunction, and provides a solution for embedded applications that need timing monitoring.

Description

technical field [0001] The invention relates to the technical field of single-chip microcomputer control, in particular to a hardware watchdog circuit with task sequence monitoring. In addition, the present invention also relates to a single-chip microcomputer control system including the above-mentioned hardware watchdog circuit with task sequence monitoring. Background technique [0002] In the current single-chip microcomputer application system, in order to improve the reliability and testability of the system, the acquisition of analog quantity is to use an AD converter to select the signal to be converted by time-sharing gating the channels of multiple analog switches. In order to ensure the correct sampling of the signal, it is necessary to monitor the output multi-channel analog switch strobe signal, so as to avoid signal misreading caused by the switch not being gated according to the timing, affecting the realization of the control function or causing malfunction, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/07G05B19/042
CPCG05B19/042G06F11/0745G06F11/0757G06F11/0793
Inventor 薛晓波袁伟陈月安白燕羽付士会王魁温南方夏毅坚
Owner CHINA HANGFA SOUTH IND CO LTD
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