Self-diagnosis, self-recovery method for computer CPU anti-interference

Abstract

A self-diagnosis self-recover method of computer CPU anti-jamming is provided. The invention relates to a computer CPU self-diagnosis noise-tolerant scheme which belongs to electronic technology electro-magnetism compatibility technology field. The invention receives a stable pulse provided by inner clock by using a timer / counter unit in microcomputer slice, and puts forward a IRQ when the timer overflows (addition type) or is zero (subtraction type); corresponding interrupt service program compels a program indicating pin return to the designated location and recover important port and data in order to forcedly realize 'soft reset'. When functional application programs operate normally, the soft makes the timer zero clearing or number setting every definite time (within the overflow periodic of the timer) so that the mis-reset caused by the overflow interrupt can be prevented. The invention does not need slice-out hard ware, is low failure rate, finds PC indicating pin's abnormity in time, and forces 'soft reset' and recover important data in real time so that the normal operation of the computer system is ensured.

Description

technical field [0001] The invention relates to a computer CPU self-diagnosis noise tolerance scheme, which belongs to the technical field of electronic technology-electromagnetic compatibility. Background technique [0002] With the continuous improvement of computer performance, it has rapidly penetrated into various control fields of traditional industries. The operating environment of the measurement and control computer is complex: some are installed in the screen cabinet of the central control room of the power plant, and some are located next to various controlled equipment; and for mechatronic products, the computer is a part of the product. Industrial computer is a combination of hardware and software, and most of them are in the harsh electromagnetic environment formed by strong electric circuits, strong electric equipment and even ultra-high frequency and ultra-high voltage electrical appliances. [0003] For the scientific and technological personnel who develop...

AI Technical Summary

Problems solved by technology

[0004] (1) For cheap microcomputer control systems (such as single-chip computers), the introduction of the above-mentioned anti-jamming hardware will significantly increase the conventional cost of the product, and in some cases the proportion of increased expenditure is even intolerable

Because of this, the noise suppression facilities of most household automatic control devices and portable digital instruments are not perfect, and malfunctions often occur in areas with strong interference

[0005] (2) The added hardware will complicate the circuit board, which will introduce new noise and improper circuit coupling

This problem is more prominent on the micro smart meter

[0006] (3) Due to the fast flipping speed of digital circuits, radio frequency interference pulses are easily generated, and the high-speed response characteristics of other integrated circuits make such pulses easy to be received, which leads to new interference and composite interference

[0007] (4) The increase of hardware often leads to the shortening of the system's trouble-free working time. "Hardware is more prone to failure than software" has become a consensus in the field of industrial control

Therefore, blindly adding anti-interference hardware not only increases the long-term cost, but also sometimes adds additional noise sources or noise receivers, increasing the incidence of system hardware failures

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