基于51单片机的出租车计价器

北京理工大学珠海学院2020届本科生毕业设计Taximeter based on 51 microcontrollerABSTRACTThe application scenario of the meter design is for taxi operation,which requires theperformance of the meter to have the range pricing.Meter by STC89C52 MCU as the mainbody,customs clearance MCU rich excuses connection,togertherwith clock circuitkeyboard circuit,reset circuit and other peripheral chips as the auxiliary,constitute a wholeto work.The significance of the reset circuit is to restart the MCU,any one of the normaluse of the meter are essential functions,when necessary can also get rid of the operatingerror dilemma,through the function of the reset circuit can work again.The purpose of the12MHz crystal clock circuit as part of the timing is to provide the meter with a highprecision system clock source.Use Proteus and other simulation software to simulate thebehavior of the meter hardware and software debugging.Connected to a power supply,the character LCD 1602 displays three types ofcharges:the starting price within the minimum starting distance,the official rate beyond theminimum distance and the waiting fare.According to the different application scenarios,you can use the button to switch between three modes:mileage charge,starting price andwaiting time.Imitate the behavior pattern of taxi in carrying passengers,pause and end.Thepause time is allow to be displayed on the 1602 LCD,as well as the runing time.The totalcost and total distance can be calculated.STC89C52 controller MCU as the main body,POport and LCD module 1602 display chip connection,Pl port is the keyboard moduleconnection port,the key is responsible for input.Keyword:STC89C52:1602 LCD:Taxi devices:DS1302;K24C02