求eda数字钟24、 12 切换程序

没有看到你的要求，给你一个我写的数字钟，在实验箱上能用
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity szz is
port(clk:in std_logic; //时钟
clk1:in std_logic;
md1:in std_logic;//设置
md2:in std_logic_vector(1 downto 0);
speak:out std_logic;蜂鸣器
dout:out std_logic_vector(6 downto 0);//数码管
selout:out std_logic_vector(2 downto 0);
scan:out std_logic_vector(7 downto 0));
end szz;
architecture one of szz is
signal sel:std_logic_vector(2 downto 0);
signal hou1:std_logic_vector(3 downto 0);
signal hou2:std_logic_vector(3 downto 0);
signal min1:std_logic_vector(3 downto 0);
signal min2:std_logic_vector(3 downto 0);
signal seth1:std_logic_vector(3 downto 0);
signal seth2:std_logic_vector(3 downto 0);
signal setm1:std_logic_vector(3 downto 0);
signal setm2:std_logic_vector(3 downto 0);
signal sec1:std_logic_vector(3 downto 0);
signal sec2:std_logic_vector(3 downto 0);
signal h1:std_logic_vector(3 downto 0);
signal h2:std_logic_vector(3 downto 0);
signal m1:std_logic_vector(3 downto 0);
signal m2:std_logic_vector(3 downto 0);
signal s1:std_logic_vector(3 downto 0);
signal s2:std_logic_vector(3 downto 0);
-------------------------------------------------
begin

----------------------------------------------模6计数
choice:process(clk1)
begin
if clk1'event and clk1='1' then
if sel="101" then sel<="000";
else
sel<=sel+1;
end if;
end if;
end process ;
-----------------------------------------------小时十位
h110:process(clk,hou2,min1,min2,sec1,sec2,md1,md2)
begin
if clk'event and clk='1' then
if (hou1="0010" and hou2="0011")and(min1="0101" and min2="1001") and (sec1="0101" and sec2="1001")then hou1<="0000";
elsif (hou1="0010"and hou2="0011")and (md1='0' and md2="10" )then--当时间为23点且处于校时状态时
hou1<="0000";
elsif (hou2="1001"and(min1="0101" and min2="1001") and (sec1="0101" and sec2="1001"))or (hou2="1001"and (md1='0' and md2="10")) then
hou1<=hou1+1;
end if;
end if;
end process h110;
-----------------------------------------------小时个位
h220:process(clk,min1,min2,sec1,sec2,md1,md2,hou1)
begin
if clk'event and clk='1' then
if (hou1="0010" and hou2="0011")and(min1="0101" and min2="1001") and (sec1="0101" and sec2="1001") then
hou2<="0000";
elsif hou2="1001"and(min1="0101" and min2="1001") and (sec1="0101" and sec2="1001")then
hou2<="0000";
elsif (hou2="1001"and (md1='0' and md2="10"))or ((hou1="0010"and hou2="0011")and (md1='0' and md2="10") )then
hou2<="0000";--md<='1'
elsif ((min1="0101" and min2="1001") and (sec1="0101" and sec2="1001") )or (md1='0' and md2="10")then
hou2<=hou2+1;--speak<=clk;
end if;
end if;
end process h220;
-----------------------------------------------分钟十位
m110:process(clk,min2,sec1,sec2,md1,md2)
begin
if clk'event and clk='1' then
if (min1="0101" and min2="1001") and (sec1="0101" and sec2="1001") then
min1<="0000";
elsif min1="0101"and min2="1001"and (md1='0' and md2="01")then
min1<="0000";
elsif (min2="1001"and (sec1="0101" and sec2="1001")) or (min2="1001"and md1='0' and md2="01")then
min1<=min1+1;
end if;
end if;
end process m110;
----------------------------------------------分钟个位
m220:process(clk,sec1,sec2,md1,md2)
begin
if clk'event and clk='1' then
if( min2="1001"and (sec1="0101" and sec2="1001"))then
min2<="0000";
elsif min2="1001"and (md1='0' and md2="01")then
min2<="0000";
elsif (sec1="0101" and sec2="1001") or(md1='0' and md2="01")then
min2<=min2+1;
end if;
end if;
end process m220;
---------------------------------------------秒十位
s110:process(clk)
begin
if clk'event and clk='1' then
if (sec1="0101" and sec2="1001")then
sec1<="0000";
else if sec2="1001"then
sec1<=sec1+1;
end if;
end if;end if;
end process s110;
--------------------------------------------秒个位
s220:process(clk)
begin
if clk'event and clk='1' then
if sec2="1001" then
sec2<="0000";
else sec2<=sec2+1;
end if;
end if;
end process s220;
-------------------------------------------时间设置小时部分
sethour1:process(clk,seth2)
begin
if clk'event and clk='1' then
if seth1="0010"and seth2="0011" then
seth1<="0000";
elsif seth2="1001" then
seth1<=seth1+1;
end if;
end if;
end process sethour1;
-------------------------------------------
sethour2:process(clk,md1,md2,seth1)
begin
if clk'event and clk='1' then
if (seth1="0010"and seth2="0011")or seth2="1001"then
seth2<="0000";
elsif md1='1' and md2="00" then
seth2<=seth2+1;
end if;
end if;
end process sethour2;
-------------------------------------------时间设置分钟部分
setmin1:process(clk,setm2)
begin
if clk'event and clk='1' then
if setm1="0101"and setm2="1001"then
setm1<="0000";
elsif setm2="1001"then
setm1<=setm1+1;
end if;
end if;
end process setmin1;
setmin2:process(clk,md1,md2)
begin
if clk'event and clk='1'then
if setm2="1001"then
setm2<="0000";
elsif md1='1' and md2="01"then
setm2<=setm2+1;
end if;
end if;
end process setmin2;
speaker:process(clk1,hou1,hou2,min1,min2)
begin
if clk1'event and clk1='1'then
if seth1=hou1 and seth2=hou2 and setm1=min1 and setm2=min2 then
speak<=clk1;
else speak<='0';
end if;
end if;
end process speaker;
disp:process(sel,md1,hou1,hou2,min1,min2,sec1,sec2,seth1,seth2,setm1,setm2)
begin
if sel="000" then
selout<="000";scan<="10000000";
case h1 is
when "0000"=>dout<="0111111";
when "0001"=>dout<="0000110";
when "0010"=>dout<="1011011";
when others =>dout<="1000000";
end case;
elsif sel="001" then
selout<="001";scan<="01000000";
case h2 is
when "0000"=>dout<="0111111";
when "0001"=>dout<="0000110";
when "0010"=>dout<="1011011";
when "0011"=>dout<="1001111";
when "0100"=>dout<="1100110";
when "0101"=>dout<="1101101";
when "0110"=>dout<="1111101";
when "0111"=>dout<="0000111";
when "1000"=>dout<="1111111";
when "1001"=>dout<="1101111";
when others=>dout<="1000000";
end case;
elsif sel="010" then
selout<="010";scan<="00100000";
case m1 is
when "0000"=>dout<="0111111";
when "0001"=>dout<="0000110";
when "0010"=>dout<="1011011";
when "0011"=>dout<="1001111";
when "0100"=>dout<="1100110";
when "0101"=>dout<="1101101";
when others=>dout<="1000000";
end case;
elsif sel="011" then
selout<="011";scan<="00010000";
case m2 is
when "0000"=>dout<="0111111";
when "0001"=>dout<="0000110";
when "0010"=>dout<="1011011";
when "0011"=>dout<="1001111";
when "0100"=>dout<="1100110";
when "0101"=>dout<="1101101";
when "0110"=>dout<="1111101";
when "0111"=>dout<="0000111";
when "1000"=>dout<="1111111";
when "1001"=>dout<="1101111";
when others=>dout<="1000000";
end case;
elsif sel="100" then
selout<="100";scan<="00001000";
case s1 is
when "0000"=>dout<="0111111";
when "0001"=>dout<="0000110";
when "0010"=>dout<="1011011";
when "0011"=>dout<="1001111";
when "0100"=>dout<="1100110";
when "0101"=>dout<="1101101";
when others=>dout<="1000000";
end case;
elsif sel="101" then
selout<="101";scan<="00000100";
case s2 is
when "0000"=>dout<="0111111";
when "0001"=>dout<="0000110";
when "0010"=>dout<="1011011";
when "0011"=>dout<="1001111";
when "0100"=>dout<="1100110";
when "0101"=>dout<="1101101";
when "0110"=>dout<="1111101";
when "0111"=>dout<="0000111";
when "1000"=>dout<="1111111";
when "1001"=>dout<="1101111";
when others=>dout<="1000000";
end case;
end if;
if md1='0' then---------------计时时间显示和设置模式
h1<=hou1;h2<=hou2;
m1<=min1;m2<=min2;
s1<=sec1;s2<=sec2;
else -----------闹铃时间现实和设置模式
h1<=seth1;h2<=seth2;
m1<=setm1;m2<=setm2;
s1<="1111";s2<="1111";
end if;
end process disp;
end ;