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Multi-state multi-semaphore serial feedback method and system

A multi-signal, multi-state technology, applied in the field of serial communication, can solve the problems of occupying more interface resources, low efficiency of signal detection and feedback, unfavorable circuit design simplicity, etc., to achieve easy implementation, flexible circuit output form, low cost effect

Pending Publication Date: 2022-04-08
WUHAN AOZE ELECTRONICS
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned technical deficiencies, provide a multi-state multi-semaphore serial feedback method and system, and solve the problem that the feedback of multiple signal states in the prior art is generally realized through multiple I / O ports or interface expansion chips. The feedback of multiple semaphores needs to occupy more interface resources, which is not conducive to the simplification of circuit design and program design, and the technical problem of low efficiency of signal detection and feedback

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  • Multi-state multi-semaphore serial feedback method and system

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Embodiment Construction

[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0025] like figure 1 As shown, the present invention provides a serial feedback method of multi-state multi-semaphore, comprising the following steps:

[0026] Step 1. After the system is powered on, activate the system first, and then perform a feedback delay, such as figure 1 As shown, a period of time before the vertical lines a and f in the figure is the feedback delay period. In this embodiment, the feedback delay signal is a low-level signal within a cycle T, and the system must be within the feedback delay period T Complete the initialization work.

[0027] Immediately output the feedback...

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Abstract

The invention discloses a multi-state multi-semaphore serial feedback method, which comprises the following steps of: firstly finishing an initialization program, then starting a feedback output period, firstly marking an operation state, and distinguishing a normal state and a fault state by a marking signal of the operation state according to the length of high level time; after operation state marking is completed, signal levels are generated at intervals of a period of time, then the semaphore state is marked, and marking signals of the semaphore state represent different states through different duty ratios; after the semaphore state flag is completed, a feedback output period is completed by the signal level at intervals of a period of time; and repeating the process, and continuing to finish the next feedback output cycle. The multi-semaphore feedback circuit can perform feedback output on the multi-semaphore with various states for each semaphore so as to report the current semaphore state, does not need a plurality of peripheral expansion interfaces, and is low in cost and easy to implement.

Description

technical field [0001] The invention relates to the technical field of serial communication, in particular to a multi-state multi-semaphore serial feedback method and system. Background technique [0002] In the field of automotive control systems, some control systems usually need to drive multiple loads. Since it is inevitable that an output channel will have an open circuit or short circuit fault, the status of each signal quantity is fed back to the ECU. State, provide warning instructions to the driver or directly take the following safety measures to avoid harming the safe operation of the vehicle system. [0003] However, the feedback of multiple signal states in the prior art generally realizes the feedback of multiple semaphores respectively through multiple I / O ports or interface expansion chips, which needs to occupy more interface resources, which is not conducive to the simplification of circuit design and program design. At the same time, the efficiency of sig...

Claims

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Application Information

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IPC IPC(8): G05B23/02
Inventor 黄俊黄浩李勇李鄂胜徐传珍
Owner WUHAN AOZE ELECTRONICS
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