出租车计费器VHDL代码Quartus仿真

名称：出租车计费器VHDL代码Quartus仿真

软件：Quartus

语言：VHDL

代码功能：

设计一个满足日常生活所需功能的出租车计费器

该计费器能实现计费功能。车起步开始计费,首先显示起步价,起步费为1000元,车在行驶3km以内,只收起步价。车行驶超过3km后,每km2元,车费依次累加。当费用达到或超过40元时,每km收费4元。当遇到红灯或客户需要停车等待时,则按时间计费为每20s收费1元。

实现计费器预置功能,能够预置起步费、每公里收费、车行加费里程、计时收费等。

FPGA代码Verilog/VHDL代码资源下载：www.hdlcode.com

演示视频：

设计文档：

1. 工程文件

2. 程序文件

原理图

代码

3. 程序编译

4. RTL图

5. 仿真图

整体仿真图

速度控制模块

状态机控制模块

显示模块

部分代码展示:

LIBRARY?ieee;
???USE?ieee.std_logic_1164.all;
???USE?ieee.std_logic_unsigned.all;
--状态机控制模块
ENTITY?taxi_state?IS
???PORT?(
??????clk_in???????????????:?IN?STD_LOGIC;--时钟100Hz
??????reset_n??????????????:?IN?STD_LOGIC;--复位信号
??????start_n??????????????:?IN?STD_LOGIC;--启动信号，行程开始
??????stop_n???????????????:?IN?STD_LOGIC;--中途暂停
??????pulse_kilometre??????:?IN?STD_LOGIC;--1公里产生一次脉冲
??????mileage_out??????????:?OUT?STD_LOGIC_VECTOR(15?DOWNTO?0);--里程
??????totel_money_out??????:?OUT?STD_LOGIC_VECTOR(15?DOWNTO?0)--合计费用
???);
END?taxi_state;
ARCHITECTURE?behave?OF?taxi_state?IS
--定义状态
???TYPE?State_type?IS?(s_idle,?s_starting_price,?s_mileage_price,?s_highmileage_price?,s_stop_1,s_stop_2,s_stop_3);??--?定义状态
???SIGNAL?state:?State_Type;????--?创建信号
???SIGNAL?totel_money???:?STD_LOGIC_VECTOR(15?DOWNTO?0)?:=?"0000000000000000";--总价钱
???SIGNAL?mileage???????:?STD_LOGIC_VECTOR(15?DOWNTO?0)?:=?"0000000000000000";--里程
???
???SIGNAL?ten_seconds???:?STD_LOGIC?:=?'0';
???SIGNAL?count_seconds?:?integer?:=?0;
BEGIN
???mileage_out?<=?mileage;--输出
???PROCESS?(clk_in,?reset_n)
???BEGIN
??????IF?(reset_n?=?'0')?THEN--复位
?????????mileage?<=?"0000000000000000";
??????ELSIF?(clk_in'EVENT?AND?clk_in?=?'1')?THEN
?????????IF?(state?=?s_starting_price?OR?state?=?s_mileage_price?OR?state?=?s_highmileage_price)?THEN
????????????IF?(pulse_kilometre?=?'1')?THEN--1公里里程加1
???????????????mileage?<=?mileage?+?"0000000000000001";
????????????ELSE
???????????????mileage?<=?mileage;
????????????END?IF;
?????????END?IF;
??????END?IF;
???END?PROCESS;
???
???--每20秒收取1元
???PROCESS?(clk_in,?reset_n)
???BEGIN
??????IF?(reset_n?=?'0')?THEN
?????????count_seconds?<=?0;
?????????ten_seconds?<=?'0';
??????ELSIF?(clk_in'EVENT?AND?clk_in?=?'1')?THEN
?????????IF?(state?=?s_stop_1?OR?state?=?s_stop_2?OR?state?=?s_stop_3)?THEN--停车等待
????????????IF?(count_seconds?>=?200)?THEN--20秒
???????????????count_seconds?<=?0;
???????????????ten_seconds?<=?'1';--20秒信号
????????????ELSE
???????????????count_seconds?<=?count_seconds?+?1;--计数
???????????????ten_seconds?<=?'0';
????????????END?IF;
?????????END?IF;
??????END?IF;
???END?PROCESS;

点击链接获取代码文件：http://www.hdlcode.com/index.php?m=home&c=View&a=index&aid=553