UART-based TFT screen alarm lamp self-checking method and system

Abstract

The embodiment of the invention provides a UART (Universal Asynchronous Receiver / Transmitter)-based TFT (Thin Film Transistor) screen alarm lamp self-checking method and system. The method comprises the steps that an instrument MCU (Microprogrammed Control Unit) collects a signal of a related electric control unit of a TFT screen alarm lamp for operation and processing, and obtains a self-checkinginstruction of the TFT screen alarm lamp; after the instrument is powered on at an ON gear, the instrument MCU sends a self-checking instruction to an instrument MPU through the UART port; and afterthe operation system of the instrument MPU is started, the TFT screen alarm lamp is detected according to the self-checking instruction. The TFT screen alarm lamp self-checking scheme provided by theinvention is based on UART serial port communication, and an interface protocol can be customized and is relatively flexible. According to the invention, the liquid crystal instrument performs self-inspection on the alarm lamp in the TFT screen for a preset period of time every time ON gear power is switched on, so that a driver can recognize the signal effectiveness of the alarm lamp icon, colorand alarm loop corresponding to each electronic control unit before the vehicle is started every time, and the driver can deal with the fault type of the electronic control unit associated with the alarm lamp in time in the driving process.

Description

technical field [0001] The invention relates to the technical field of vehicles, and more specifically, to a method and system for self-inspection of a TFT screen warning light based on UART. Background technique [0002] The intelligentization, electrification, networking, light weight and sharing of automobiles have increased the number of electronic control components supporting the vehicle, and the connection relationship and control logic between various components have become more complicated. The functions of electronic control systems such as engine operation, automatic transmission shifting, electric power steering, body stability control, and body control systems require the use of various sensors, collectors, processors, and actuators. communicate with each other. If a component of the above-mentioned electronic control system fails, or there is a communication failure between them, it may cause the electronic control unit of the vehicle to fail to obtain correct...

AI Technical Summary

Problems solved by technology

[0007] The embodiment of the present invention provides a UART-based TFT screen alarm light self-inspection method and system to solve the problem in the prior art that the alarm light in the TFT screen of the liquid crystal instrument cannot be turned on for self-inspection

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