EDA數(shù)字秒表的設(shè)計(jì)程序

EDA數(shù)字秒表的設(shè)計(jì)程序2。開機(jī)顯示00。00。00，用戶課隨時(shí)計(jì)時(shí)，暫停，清零，最大計(jì)時(shí)可到59分59。99秒。

3。技術(shù)時(shí)鐘為100HZ

4。采納時(shí)分復(fù)用的方法掌握4個(gè)數(shù)碼管的顯示，可節(jié)約資源。

程序如下：

Libraryieee;

Useieee.std_logic_1164.all;

Useieee.std_logic_arith.all;

Useieee.std_logic_unsigned.all;

Entitywatchis

Port(sel:outstd_logic_vector(6downto

1);

seg:outstd_logic_vector(7downto0);

Beginstop:instd_logic;

Reset:instd_logic;

Cp2:instd_logic);

Endwatch;

Architecturebehaveofwatchis

Signalnum1:std_logic_vector(3downto0);

Signalnum2:std_logic_vector(3downto0);

Signalnum3:std_logic_vector(3downto0);

Signalnum4:std_logic_vector(3downto0);

Signalnum5:std_logic_vector(3downto0);

Signalnum6:std_logic_vector(3downto0);

Signalnum:std_logic_vector(3downto0);

Signalnumlet:std_logic_vector(2downto0);

Signalcount:std_logic_vector(17downto

1);

Signalselsig:std_logic_vector(6downto

1);

Signalsegsig:std_logic_vector(7downto0);

Signalcp1:std_logic;

Signalcp3:std_logic;

Begin

Process(cp

2)----分頻。

Begin

If(cp2”eventandcp2=”1”)then

if(Count=“1100011010011111“)then

count=“00000000000000000“;cp1=notcp1;

elsecount=count1;

endif;

endif;

cp3=count

(10);

endprocess;

process(cp

1)

begin

ifreset=”1”thennum1(3downto0)=“0000“;

num2(3downto0)=“0000“;

num3(3downto0)=“0000“;

num4(3downto0)=“0000“;

num5(3downto0)=“0000“;

num6(3downto0)=“0000“;

elseifcp1”eventandcp1=”1”then

ifbeginstop=”1”thennum1=num11;

ifnum1(3downto0)=“1001“thenifnum2(3downto0)=“1001“then

num2(3downto0)=“0000“;num3=num31;

ifnum3(3downto0)=“1001“then

num3(3downto0)=“0000“;num4=num41;

ifnum4(3downto0)=“0101“then

num4(3downto0)=“0000“;num5=num51;

ifnum5(3downto0)=“1001“then

num5(3downto0)=“0000“;num6=num61;

ifnum6(3downto0)=“0101“then

num6(3downto0)=“0000“;

endif;endif;endif;endif;endif;endif;endif;

endif;endif;

endprocess;

process(cp

3)

begin

if(cp3”eventandcp3=”1”)then

if(numlet(2downto0)=“000“)then

num=num1;selsig(6downto

1)=“111110“;endif;

if(numlet(2downto0)=“001“)then

num=num2;selsig(6downto

1)=“111101“;endif;

if(numlet(2downto0)=“010“)then

num=num3;selsig(6downto

1)=“111011“;endif;

if(numlet(2downto0)=“011“)then

num=num4;selsig(6downto

1)=“110111“;endif;

if(numlet(2downto0)=“100“)then

num=num5;selsig(6downto

1)=“101111“;endif;

numlet(2downto0)=numlet(2downto0)1;

if(numlet(2downto0)=“101“)then

numlet(2downto0)=“011111“;endif;

endif;

if(num(3downto0)=“0000“)then

segsig(7downto0)=“01111111“;endif;

if(num(3downto0)=“0001“)then

segsig(7downto0)=“00001101“;endif;

if(num(3downto0)=“0010“)then

segsig(7downto0)=“10110111“;endif;

if(num(3downto0)=“0011“)then

segsig(7downto0)=“10011111“;endif;

if(num(3downto0)=“0100“)then

segsig(7downto0)=“11001101“;endif;

if(num(3downto0)=“0101“)then

segsig(7downto0)=“11011011“;endif;

if(num(3downto0)=“0110“)then

segsig(7downto0)=“11111011“;endif;

if(num(3downto0)=“0111“)then

segsig(7downto0)=“00001111“;endif;

if(num(3downto0)=“1000“)then

segsig(7downto0)=“11111111“;endif;