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Signal-abnormal-assistant positioning circuit and method

An auxiliary positioning and signal abnormality technology, which is applied in the field of signal processing, can solve problems such as analysis and debugging work resistance, inability to locate signal signal status, and inability to restore abnormal status, so as to improve debugging and verification efficiency and reduce development costs.

Active Publication Date: 2017-06-13
SHANDONG INSPUR SCI RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, when the signal is abnormal, because it is not sure which signal the abnormality is caused by, and the logic analyzer generally uses 1s as the display interval, it is impossible to locate the state of each signal in the circuit at the time of the signal abnormality, so it is impossible to restore the abnormal state. Debugging brings resistance

Method used

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  • Signal-abnormal-assistant positioning circuit and method

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Embodiment 1

[0025] Configure signal abnormality auxiliary positioning circuit, the auxiliary positioning circuit is mainly composed of counting module, edge detection module and abnormal position output module;

[0026] The counting module counts the clock cycle of the signal to be detected, before which the output of the edge detection module is effectively cleared; the count overflow valid signal is sent to the abnormal position output module to determine whether the abnormal position output signal is Effective; the counting range of the counting module is determined by the maximum value of the observed value of the interval between the normal high and low level transitions of the signal to be detected; the effective signal of the counting overflow of the counting module is determined by each bit of the counting module or its logical combination.

[0027] The edge detection module is used to detect the rising edge or falling edge change of the signal to be detected, the change trend of t...

Embodiment 2

[0034] Configure signal abnormality auxiliary positioning circuit, the auxiliary positioning circuit is mainly composed of counting module, edge detection module and abnormal position output module;

[0035] The counting module is effectively cleared by the output of the edge detection module, counts the clock cycle of the signal to be detected, and determines a count overflow upper limit by observing and analyzing the waveform of the signal to be detected, using the upper three bits of the counter or its logical combination As counting overflow effective output, its counting overflow effective signal is sent into described abnormal position output module, is used for judging whether the abnormal position output signal is effective; Described counting module counting range is by the interval of normal high and low level transition of signal to be detected The maximum value of the calculated value is determined; the effective signal of counting overflow of the counting module is...

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Abstract

The invention discloses a signal-abnormal-assistant positioning circuit and method. The signal-abnormal-assistant positioning circuit is mainly composed of a counting module, an edge detecting module and an abnormal-position output module; the counting module carries out clock period counting on a to-be-detected signal, an effective signal overflowed through counting of the counting module is fed into the abnormal-position output module, and the abnormal-position output module is used for judging an output signal of an abnormal position is effective or not; the edge detecting module is used for detecting changes of a rising edge of the to-be-detected signal or changes of a falling edge of the to-be-detected signal, and effective output of edge detection is fed into the counting module for zero clearing; the abnormal-position output module is used for marking the abnormal position of the to-be-detected signal. According to the technology of the signal-abnormal-assistant positioning circuit and method, a marking signal is grabbed through logical analysis software, the circuit state when the to-be-detected signal is abnormal can be rapidly and accurately positioned, abnormal appearance reasons are convenient to analyze and find, the debugging verification efficiency is improved accordingly, and the development cost is reduced.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a signal abnormality auxiliary positioning circuit and method. Background technique [0002] For programmable logic devices such as FPGA or CPLD, when verifying and debugging the design, you can usually use the logic analyzer software provided by the chip manufacturer to capture relevant signals, observe and analyze the high and low level changes of relevant signals to analyze the design. authenticating. [0003] However, when the signal is abnormal, because it is not sure which signal the abnormality is caused by, and the logic analyzer generally uses 1s as the display interval, it is impossible to locate the state of each signal in the circuit at the time of the signal abnormality, so it is impossible to restore the abnormal state. Debugging brings resistance. [0004] Published relevant patent documents: titled "Protection Method for Electronic Devices Driven by DC...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 王子彤姜凯于治楼
Owner SHANDONG INSPUR SCI RES INST CO LTD
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