Signal line PWM function identification method

Abstract

The invention discloses a signal line PWM function identification method. An MCU control end and a PWM signal output switch are arranged at a vehicle end; the lamp end of the vehicle lamp is also provided with an MCU control end and a divider resistor; the MCU control end of the whole vehicle sends a PWM signal to the MCU control end of the vehicle lamp through an entity signal line, the PWM signal waveform sent by the MCU control end of the whole vehicle is transmitted to the vehicle lamp, the vehicle lamp end performs voltage division on the PWM signal and then accesses the PWM signal to the MCU receiving end of the vehicle lamp, and the vehicle lamp end controls the corresponding lamps according to the calculated PWM signal duty ratio information and a protocol agreed with the whole vehicle in advance. According to the invention, the transmission of various instructions is realized through different PWM duty ratios of a hard wire signal, so that the number of interfaces between the whole vehicle and the vehicle lamp is small; and due to the fact that the method is based on traditional high-low level instruction transmission, hard wire interfaces can be saved, precision is high, operation is convenient, and instruction transmission is more precise and accurate.

Description

technical field [0001] The invention relates to the technical field of communication signals, in particular to a signal line PWM function identification method. Background technique [0002] With the development of the automobile industry, the electronicization of automobiles currently on the market requires more and more refinement. [0003] In the current existing technology, there are many problems in the communication between the vehicle and the lights on the market. Usually, when the vehicle cannot use CAN / LIN communication to send function instructions to the lights due to various reasons, the vehicle needs to Instructions are issued through hard-wired high and low levels, but if the entire vehicle needs to issue multiple instructions to the lights, multiple hard-wired signal lines will be needed to connect to the lights, resulting in a great waste of resources. Contents of the invention [0004] (1) Solved technical problems [0005] Aiming at the deficiencies of ...

AI Technical Summary

Problems solved by technology

[0003] In the current existing technology, there are many problems in the communication between the vehicle and the lights on the market. Usually, when the vehicle cannot use CAN / LIN communication to send function instructions to the lights due to various reasons, the vehicle needs to Instructions are issued through hard-wired high and low levels, but if the whole vehicle needs to send multiple instructions to the lights, multiple hard-wired signal lines will be needed to connect to the lights, resulting in a great waste of resources

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