EEPW论坛

折腾了一周，终于把数码管搞通了。

啥也不说了，先上张效果图。

本来是按时间格式写的，左边4为数码管显示2013，右边显示分钟.秒。但是精确定时没写，日历也还没研究，所以只是随便显示的一个计数器。左边2013，右边为递增的计数器：右边1、2位数码管增加到60，则像右边3、4为数码管进1。

代码采用VHDL写的，希望大家指点：所有代码没加注释，也算让要学习的学习一下，有不明白的欢迎留言探讨。

library ieee;

use ieee.std_logic_1164.all;


entity Seg_Increasing is
port(
segment:buffer bit_vector(0 to 7);
seg_select:out bit_vector(0 to 7);
clk:in std_logic
 ); 
end Seg_Increasing;




architecture segment_show_number of Seg_Increasing is
signal sel : integer range 0 to 8;
signal data1 : integer  range 0 to 10;
signal data2 : integer  range 0 to 6;
signal data3 : integer  range 0 to 10;
signal data4 : integer  range 0 to 6;
--signal data5 : integer  range 0 to 10;
--signal data6 : integer  range 0 to 10;
--signal data7 : integer  range 0 to 10;
--signal data8 : integer  range 0 to 10;


procedure show_number(n :in integer; withdot: in bit)is
begin
case n is
when 1 =>
if withdot='1' then segment <= "10011111" and "11111110"; --1
else segment <= "10011111";
end if;
when 2 =>
if withdot='1' then segment <= "00100101" and "11111110"; --2
else segment <= "00100101";
end if;
when 3 =>
if withdot='1' then segment <= "00001101" and "11111110"; --3
else segment <= "00001101";
end if;
when 4 =>
if withdot='1' then segment <= "10011001" and "11111110"; --4
else segment <= "10011001";
end if;
when 5 =>
if withdot='1' then segment <= "01001001" and "11111110"; --5
else segment <= "01001001";
end if;
when 6 =>
if withdot='1' then segment <= "01000001" and "11111110"; --6
else segment <= "01000001";
end if;
when 7 =>
if withdot='1' then segment <= "00011111" and "11111110"; --7
else segment <= "00011111";
end if;
when 8 =>
if withdot='1' then segment <= "00000001" and "11111110"; --8
else segment <= "00000001";
end if;
when 9 =>
if withdot='1' then segment <= "00001001" and "11111110"; --9
else segment <= "00001001";
end if;
when 0 =>
if withdot='1' then segment <= "00000011" and "11111110"; --0
else segment <= "00000011";
end if;
when others=>segment <= "11111111";
end case;
end show_number;










begin



process(Clk)
constant N:integer :=8000;
variable count:integer range 0 to N :=0;
begin
if(rising_edge(Clk)) then
count := count + 1;
if count>=N then
if sel>8 then
sel <= 1;
else 
sel <= sel + 1;
end if;
count := 0;
end if;
end if;
end process;



process(Clk)
constant N:integer :=3000;
variable count1:integer range 0 to N :=0;
variable count2:integer range 0 to N :=0;
begin
if(rising_edge(Clk)) then
count1 := count1 + 1;
if count1>=N then
count1 := 0;
count2 := count2+1;
if count2 >= N then
count2 := 0;
if data1>=9 then
data1 <= 0;
if(data2>=5) then
data2 <= 0;
if data3 >= 9 then
data3 <= 0;
if data4>=5 then
data4 <= 0;
else 
data4 <= data4+1;
end if;
else 
data3 <= data3+1;
end if;
else
data2 <= data2+1;
end if;
else 
data1 <= data1 + 1;
end if;
end if;

end if;
end if;
end process;






process(sel)
begin
case (sel) is
when 1 => show_number(2,'0');seg_select <= "11111110";
when 2 => show_number(0,'0');seg_select <= "11111101"; 
when 3 => show_number(1,'0');seg_select <= "11111011"; 
when 4 => show_number(3,'1');seg_select <= "11110111"; 
when 5 => show_number(data4,'0');seg_select <= "11101111";
when 6 => show_number(data3,'1');seg_select <= "11011111";
when 7 => show_number(data2,'0');seg_select <= "10111111"; 
when 8 => show_number(data1,'0');seg_select <= "01111111";
WHEN OTHERS => seg_select <= "11111111";
end case;
end process;






end architecture;