基于CPLD的出租车计价器的设计与研究

the Design and Research of Taxi Price System Based on CPLD

该文论述了一种基于CPLD的出租车计价系统。该系统硬件主要由CPLD芯片、车速传感器、外围芯片74LS164和数码管组成;软件包括显示子程序、时钟子程序、计量子程序等几个子程序模块。该计价器通过十六个数码管和三个按键,可以显示时间、单价、起步价、里程数,可以手动切换返程价、郊区价,可以自由修改时间、单价、起步价,可以实现夜间价、低速价的自动转换等功能。

This article elaborated one kind to count the price system of taxi based on the CPLD. This system hardware mainly inducle of CPLD. the vehicle speed sensor, periphery chip 74LS164 and the digital tube, Software including demonstration subroutine, clock subroutine, measurement subroutine and so on several stature program module.