Wire mixing detection method

Abstract

The invention provides a wire mixing detection method, comprising the steps of for input pins which are arranged in sequence within a target chip, when external input signals need to be connected withthe input pins of the target chip, selecting spaced input pins as target pins, carrying out one-to-one connection on the target pins and the external input signals, taking idle pins between every other two target pins as check pins, and carrying out the one-to-one connection on the check pins and preset check signals; and when the external input signals need to be read from output pins of the target chip, judging whether wire mixing occurs in the input pins of the target pin or not according to a relationship between output signals on the output pins corresponding to the check pins, and the corresponding preset check signals. According to the wire mixing detection method provided by the invention, whether the wire mixing exists in the pins or not is judged in a mode of inserting the preset check signals into the continuous input pins. The method is simple, easy and effective and is applicable to wire mixing detection in various application scenes.

Description

technical field [0001] The invention relates to the technical field of safety control, in particular to a mixed line detection method. Background technique [0002] In safety-related control fields such as train operation control, elevator control, and fire control, the circuit design of related products has high safety and reliability requirements. When a component fails, it can be detected in real time and alarmed, so that correct safety measures can be taken to cut off the output, so that the product is in a safe state, and the safety and reliability are improved accordingly. [0003] The circuit design of most products will use the core processor chip to access external interface devices through an asynchronous bus (including chip select signal lines, address signal lines, and data signal lines) according to functional requirements. This is currently the most common and common circuit design. [0004] In this type of design, a common problem will be encountered. If the ...

AI Technical Summary

Problems solved by technology

In the figure, pins A and B, B and C, Y0 and Y1 of U1, pins A1 and A2, A2 and A3, A3 and A4, A4 and A5, A5 and A6, A6 and A7, A7 and A8, B1 and B2, B2 and B3, B3 and B4, B4 and B5, B5 and B6, B6 and B7, B7 and B8, if a short circuit fault occurs, the external input state obtained by the core processor will be wrong, which is in It is unexpected in the actual operation process. Obtaining wrong data to participate in the core operation processing will lead to dangerous processing and generate erroneous output.

For example, for INPUT1~INPUT8, the expected acquired data is 0b00001110, when the pins A1 and A2 are short-circuited, the actually acquired data is 0b00001100, resulting in a data error

Images