文档介绍：海电力学院
课程设计报告
课程设计名称： FPGA设计实践课程
设计课题名称： 出租车计费器
班级： 2008141 指导老师: 赵倩
姓名： 丁晓亮 学号： 20082614
成绩： 设计时间：2011-6-27f (luc1>="0011" or luc2>="0001") then --路程超过 30 (3000M)
if (luf3<"0010") then -- 路费低于 20 元
if (luf1="1000" and luf0<="0110") then luf0<=luf0+"0010"; luf1<="0000";c1:='1';
elsif(luf1="1000" and luf0="1000") then
luf0<="0000";luf1<="0001";c1:='1';
elsif(luf1="0111" and luf0="1000") then luf0<="0000";luf1<="0000";c1:='1';
elsif(luf1="1001" and luf0<="0110") then luf0<=luf0+"0010";luf1<="0001";c1:='1';
elsif(luf1="1001" and luf0="1000") then luf0<="0000";luf1<="0010";c1:='1';
elsif(luf1<"0111" and luf0="1000") then luf0<="0000";luf1<=luf1+"0011";c1:='0';
else
luf0<=luf0+"0010";luf1<=luf1+"0010";c1:='0';
end if;
else -- 路费大于 20 元
if (luf0<="0110" and luf1="0111") then
luf0<=luf0+"0011";luf1<="0000";c1:='1'; elsif(luf0<="0110" and luf1="1000") then
luf0<=luf0+"0011";luf1<="0001";c1:='1'; elsif(luf0<="0110" and luf1="1001") then
luf0<=luf0+"0011";luf1<="0010";c1:='1'; elsif(luf0="0111" and luf1<="0101") then
luf0<="0000" ; luf1<=luf1+"0100";c1:='0'; elsif(luf0="0111" and luf1="0110") then
luf0<="0000" ;luf1<="0000";c1:='1'; elsif(luf0="0111" and luf1="0111") then
luf0<="0000" ;luf1<="0001";c1:='1'; elsif(luf0="0111" and luf1="1000") then
luf0<="0000" ; luf1<="0010";c1:='1'; elsif(luf0="0111" and luf1="1001") then
luf0<="0000" ; luf1<="0011";c1:='