發(fā)布時(shí)間：2018-04-18 08:44

  本文選題：LED光帶 + 串口調(diào)試助手��； 參考：《天津大學(xué)》2014年碩士論文

【摘要】：隨著城市車輛數(shù)量的增加,交通擁堵現(xiàn)象越來越嚴(yán)重。本文闡述的光帶型可變信息標(biāo)志是為應(yīng)對現(xiàn)在的交通現(xiàn)象,提供司機(jī)前方路面情況信息而設(shè)計(jì)的智能交通誘導(dǎo)標(biāo)志。它是由光帶部分和文字部分組成,用圖形顯示道路整體輪廓走向,用文字提示信息。光帶部分顯示的顏色是紅、綠、黃三色,與之對應(yīng)的是路段堵塞、暢通和擁擠三種路面信息。光帶控制部分由工控機(jī)和光帶顯示控制器構(gòu)成,采用串口傳遞數(shù)據(jù),按自訂通信協(xié)議通訊。工控機(jī)使用串口調(diào)試助手發(fā)送數(shù)據(jù),采用串行方式。光帶顯示控制器主要由單片機(jī)和CPLD構(gòu)成。單片機(jī)采用STC89C52,其主要作用是通信處理并生成顯示數(shù)據(jù)。因?yàn)閱纹瑱C(jī)工作頻率低,數(shù)據(jù)傳輸需要快速移位,本文采用型號為EPM7128的CPLD來實(shí)現(xiàn)數(shù)據(jù)快速移位。驅(qū)動芯片選擇74HC595,其功能是實(shí)現(xiàn)串行數(shù)據(jù)轉(zhuǎn)換成并行數(shù)據(jù)輸出,驅(qū)動LED顯示不同顏色。文字部分同樣由單片機(jī)控制,行驅(qū)動器為74LS138,八個(gè)列驅(qū)動器為74HC595,驅(qū)動顯示屏顯示。該電子顯示屏用來顯示文字提示路況信息,全屏設(shè)計(jì)顯示四個(gè)漢字,采用十六塊八乘八點(diǎn)陣顯示模塊來組成四個(gè)十六乘十六點(diǎn)陣顯示模式。文字顯示采用動態(tài)顯示,顯示方式為左移入顯示方式。
[Abstract]:With the increase of the number of urban vehicles, traffic congestion is becoming more and more serious.The light band variable information sign described in this paper is an intelligent traffic guidance sign designed to deal with the current traffic phenomenon and provide information on the road conditions in front of the driver.It is composed of light band part and text part.The color of the ribbon is red, green and yellow, corresponding to three kinds of road information: road jam, smooth flow and congestion.The optical tape control part is composed of industrial control computer and optical tape display controller. Serial port is used to transmit data and communicate according to custom communication protocol.IPC uses serial debugging assistant to send data, using serial mode.The optical tape display controller is mainly composed of single chip and CPLD.Single-chip computer uses STC 89 C 52, its main function is communication processing and generating display data.Because of the low working frequency of single chip computer, the data transfer needs to be shifted quickly. In this paper, the CPLD of EPM7128 is used to realize the fast shift of data.The driver chip selects 74HC595. its function is to transform serial data into parallel data output and drive LED to display different colors.The text part is also controlled by single chip computer, the line driver is 74LS138. the eight column driver is 74HC595. the display screen is driven.The electronic display screen is used to display the information of road condition, the full-screen design displays four Chinese characters, and the display module of 16 blocks, 8 times 8 points array is used to form the display mode of four 16 times 16:00 array.Text display uses dynamic display, display mode is left-in display mode.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN873

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相關(guān)期刊論文 前2條

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本文編號：1767621