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自動售貨機(jī)VHDL程序 （1）自動售貨機(jī)VHDL程序如下： --文件名：pl_auto1.vhd。 --功能：貨物信息存儲，進(jìn)程控制，硬幣處理，余額計(jì)算，顯示等功能。 --說明：顯示的錢數(shù)coin的以5角為單位。 library ieee; use ieee.std_logic_arith.all; use ieee.std_logic_1164.all; use ieee.std_logic_unsigned.all; entity PL_auto1 is port ( clk:in std_logic; --系統(tǒng)時(shí)鐘 set,get,sel,finish: in std_logic; --設(shè)定、買、選擇、完成信號 coin0,coin1: in std_logic; --5角硬幣、1元硬幣 price,quantity :in std_logic_vector(3 downto 0); --價(jià)格、數(shù)量數(shù)據(jù) item0 , act:out std_logic_vector(3 downto 0); --顯示、開關(guān)信號 y0,y1 :out std_logic_vector(6 downto 0); --錢數(shù)、商品數(shù)量顯示數(shù)據(jù) act10,act5 :out std_logic); --1元硬幣、5角硬幣 end PL_auto1; architecture behav of PL_auto1 is type ram_type is array(3 downto 0)of std_logic_vector(7 downto 0); signal ram :ram_type; --定義RAM signal item: std_logic_vector(1 downto 0); --商品種類 signal coin: std_logic_vector(3 downto 0); --幣數(shù)計(jì)數(shù)器 signal pri,qua:std_logic_vector(3 downto 0); --商品單價(jià)、數(shù)量 signal clk1: std_logic; --控制系統(tǒng)的時(shí)鐘信號 begin com:process(set,clk1) variable quan:std_logic_vector(3 downto 0); begin if set='1' then ram(conv_integer(item))<=price & quantity;act<="0000"; --把商品的單價(jià)、數(shù)量置入到RAM elsif clk1'event and clk1='1' then act5<='0'; act10<='0'; if coin0='1' then if coin<"1001"then coin<=coin+1; --投入5角硬幣，coin自加1 else coin<="0000"; end if; elsif coin1='1' then if coin<"1001"then coin<=coin+2; --投入1元硬幣，coin自加2 else coin<="0000"; end if; elsif sel='1' then item<=item+1; --對商品進(jìn)行循環(huán)選擇 elsif get='1' then --對商品進(jìn)行購買 if qua>"0000" and coin>=pri then coin<=coin-pri;quan:=quan-1; ram(conv_integer(item))<=pri & quan; if item="00" then act<="1000"; --購買時(shí)，自動售貨機(jī)對4種商品的操作 elsif item="01" then act<="0100"; elsif item="10" then act<="0010"; elsif item="11" then act<="0001"; end if; end if; elsif finish='1' then --結(jié)束交易，退幣（找?guī)牛? if coin>"0001" then act10<='1';coin<=coin-2; --此IF語句完成找?guī)挪僮? elsif coin>"0000" then act5<='1'; coin<=coin-1; else act5<='0'; act10<='0'; end if; elsif get='0' then act<="0000"; for i in 4 to 7 loop pri(i-4)<=ram (conv_integer(item))(i); --商品單價(jià)的讀取 end loop; for i in 0 to 3 loop quan(i):=ram(conv_integer(item))(i); --商品數(shù)量的讀取 end loop; end if; end if; qua<=quan; end process com; m32:process(clk) --此進(jìn)程完成對32Mhz的脈沖分頻 variable q: std_logic_vector( 24 downto 0); begin if clk'event and clk='1' then q:=q+1; end if; if q="111111111111111111111111" then clk1<='1'; else clk1<='0'; end if; end process m32; code0:process(item) --商品指示燈譯碼 begin case item is when "00"=>item0<="0111"; when "01"=>item0<="1011"; when "10"=>item0<="1101"; when others=>item0<="1110"; end case; end process; code1: process (coin) --錢數(shù)的BCD到七段碼的譯碼 begin case coin is when "0000"=>y0<="0000001"; when "0001"=>y0<="1001111"; when "0010"=>y0<="0010010"; when "0011"=>y0<="0000110"; when "0100"=>y0<="1001100"; when "0101"=>y0<="0100100"; when "0110"=>y0<="0100000"; when "0111"=>y0<="0001111"; when "1000"=>y0<="0000000"; when "1001"=>y0<="0000100"; when others=>y0<="1111111"; end case; end process; code2: process (qua) --單價(jià)的BCD到七段碼的譯碼 begin case qua is when "0000"=>y1<="0000001"; when "0001"=>y1<="1001111"; when "0010"=>y1<="0010010"; when "0011"=>y1<="0000110"; when "0100"=>y1<="1001100"; when "0101"=>y1<="0100100"; when "0110"=>y1<="0100000"; when "0111"=>y1<="0001111"; when "1000"=>y1<="0000000"; when "1001"=>y1<="0000100"; when others=>y1<="1111111"; end case; end process; end behav;

回答者：syugf2016-12-04 00:00