基于ＦＰＧＡ的秒表的设计

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基于ＦＰＧＡ的秒表的设计

课程设计刚做完，发个秒表的程序分享下。
6 q5 H0 f; T8 @9 }  c实验版是Ａｌｔｅｒａ公司的ｅｐ２ｃ５ｑ２０８ｃ８，晶振为５０Ｍｈｚ。
功能为复位，启停，用６为数码管显示。精确到１/１００ｓ。
: A- G; F- e& [5 q" ?/ ]1 Y程序为：
LIBRARY IEEE;
USE IEEE.STD_LOGIC_1164.ALL;
USE IEEE.STD_LOGIC_UNSIGNED.ALL;
--------------实体----------------
ENTITY jishuqi IS
PORT(start_stop,res,clk:IN STD_LOGIC;
& b; H$ |' G4 D8 ^7 C- Fsel:OUT STD_LOGIC_VECTOR (2 DOWNTO 0);
data:OUT STD_LOGIC_VECTOR (6 DOWNTO 0));
END jishuqi;
( ^. T- b1 x: j1 S: _' D1 [2 G/ _--------------构造体-------------------------------------
ARCHITECTURE rtl OF jishuqi IS
SIGNAL clk_1:STD_LOGIC;
SIGNAL clk_2:STD_LOGIC;
3 H; M$ }$ I0 E: X: I% SSIGNAL Flag_1:STD_LOGIC:='0';
SIGNAL Flag_2:STD_LOGIC:='0';
BEGIN
) d+ W8 `) h4 q9 z# K. A---------------分频-----------------------------------
PROCESS(clk)
' G+ t! L' {) tVARIABLE count:integer:=0;
! _4 u( T' U9 b) d4 G- QBEGIN
IF(clk'event AND clk='1') THEN
count:=count+1;
3 V1 w' B: [9 h( ^' rIF(count <= 390) THEN
clk_1<='0';
! q- G' W0 @& jEND IF;
IF(count > 390 ) THEN
clk_1<='1';
END IF;
IF(count >= 790 ) THEN
count:=0;
: A: ]% f# m3 }# ^6 gEND IF;
END IF;
END PROCESS;
+ k+ g* w% u2 p--------------------------------------------------------
PROCESS(clk)
' C: K4 [4 _/ ?3 o2 B" iVARIABLE count_1:integer:=0;
3 j1 M9 [/ T8 Z! ^! U5 E: cBEGIN
IF(clk'event AND clk='1') THEN
count_1 := count_1 + 1;
IF(count_1 <= 159999) THEN
clk_2 <= '0';
8 I' p7 q; I) x0 g8 l" B: N* KEND IF;
) f- \5 w$ O* F# h% yIF(count_1 > 159999) THEN
clk_2 <= '1';
1 X3 L# j) |2 l% Q, f3 T) DEND IF;
IF(count_1 >= 319999) THEN
count_1 := 0;
END IF;
+ z, H8 Y+ z; v! O# DEND IF;
END PROCESS;
- q( q4 O6 x3 F8 Q7 C--------------------计数-----------------------------------
PROCESS(clk_1,clk_2,start_stop,res)
* a3 K& ]7 g0 W' @$ a% z% H7 ZVARIABLE temp:integer:=0;
VARIABLE odata:integer:=0;
VARIABLE second_1:integer:=0;
  [5 K8 E, N3 Y& M  V- kVARIABLE second_2:integer:=0;
' m, _& d% B0 I$ d; cVARIABLE second_3:integer:=0;
- T! B& e, d% `VARIABLE second_4:integer:=0;
; P; i! O0 {# c5 `6 fVARIABLE second_5:integer:=0;
" d1 w* `' A$ }) l4 OVARIABLE second_6:integer:=0;
BEGIN
IF(clk_2'EVENT AND clk_2='1' AND Flag_1 = '1') THEN
. Y1 a9 P2 ]; u( }" Bsecond_1 := second_1 + 1;
) B# R7 N, E" l) q' H; K2 P3 z" ?IF(second_1 = 10) THEN
second_1 := 0;
' P% G" E8 z/ Q* O2 I" o9 x6 Jsecond_2 := second_2 + 1;
END IF;
' P0 N# Q5 V: Q) ]3 S# s; l& PIF(second_2 = 10) THEN
9 j5 J/ c+ R. i. b$ jsecond_2 := 0;
+ t% ]9 v' m* n: m& fsecond_3 := second_3 + 1;
END IF;
IF(second_3 = 10) THEN
! f+ A$ U# I6 w% c! c- ?second_3 := 0;
+ h6 ^% S4 v$ y$ @* o7 ~- M/ Ysecond_4 := second_4 + 1;
END IF;
IF(second_4 = 6) THEN
  G9 v, d+ k7 f$ T8 p2 k8 n- `second_4 := 0;
& N) ^3 j* q+ Msecond_5 := second_5 + 1;
/ e- w8 t  ]  D& m) B* k* lEND IF;
- z9 L2 a; t+ @! f; C8 r2 aIF(second_5 = 10) THEN
second_5 := 0;
second_6 := second_6 + 1;
END IF;
0 z* s1 ~, X1 ?  v( EIF(second_6 = 6) THEN
* c+ G: ?( S  ]  jsecond_6 := 0;
END IF;
END IF;
if (res='1')  then
second_1:=0;
9 O% F+ U$ B+ O$ R( Csecond_2:=0;
4 v% E0 x8 V( J/ Ysecond_3:=0;
second_4:=0;
second_5:=0;
second_6:=0;
/ ^1 {6 T' h- F8 d7 K7 A! Iend if;
4 O1 J; l( C7 g8 A6 T: i( T  
4 z3 P2 X7 G: E
1 a7 n! f: x8 R* h9 e5 d-----------------------位选------------------------------------
$ |! `4 L& ]1 R% P3 IIF(clk_1'EVENT AND clk_1='1') THEN
1 M; @+ c; p5 @  J( ^temp:= temp + 1;
9 C, [1 h( a5 oIF(temp = 1) THEN
sel <= "010";
' h9 I& V7 F2 U, {3 k/ x$ vodata := second_6;
ELSIF(temp = 2) THEN
sel <= "011";
! D+ c* t0 F5 x6 a! }  O! ^odata := second_5;
' W  v0 T6 c) y+ u& Z- f& O. [ELSIF(temp = 3) THEN
. N) N+ S2 H3 L3 T4 X6 ^' W* R# Usel <= "100";
odata := second_4;
ELSIF(temp = 4) THEN
sel <= "101";
odata := second_3;
% _' q( P2 v! W' U- y: W) v9 Q+ Y  nELSIF(temp = 5) THEN
sel <= "110";
odata := second_2;
# o" E- @! Q1 h* Y: e0 L% NELSIF(temp = 6) THEN
* _2 ?1 y+ P) Q" l: Z  E; Q1 w# p5 bsel <= "111";
odata := second_1;
& O: {6 {8 I. G. S7 L* ]temp:= 0;
. ^3 ]$ }4 `/ C$ x2 B) FEND IF;
END IF;
9 v! k# g7 B* A; e' S" u% c----------------------显示--------------------------------
3 c$ r2 y* _) YIF(odata = 0) THEN data<="0111111";
ELSIF(odata = 1) THEN data<="0000110";
ELSIF(odata = 2) THEN data<="1011011";
, k+ I: P* J9 }$ f) T0 cELSIF(odata = 3) THEN data<="1001111";
ELSIF(odata = 4) THEN data<="1100110";
ELSIF(odata = 5) THEN data<="1101101";
ELSIF(odata = 6) THEN data<="1111101";
ELSIF(odata = 7) THEN data<="0000111";
$ N- e1 Z* x! @* c3 EELSIF(odata = 8) THEN data<="1111111";
. @2 F" A- s; d5 O9 nELSIF(odata = 9) THEN data<="1101111";
+ w- ]2 {4 @9 g* t1 VELSE
% K( O1 Z6 |; Q* _: _* g& ~data<="XXXXXXX";
6 f$ c& r6 o! |4 @END IF;
END PROCESS;
---------------------起停------------------------------------
PROCESS(start_stop)
: ^  L# c" l& s1 j: D2 fBEGIN
IF(start_stop'EVENT AND start_stop='0') THEN
Flag_1 <= NOT Flag_1;
0 |+ m1 c" D. W7 p2 i# |END IF;
/ V; V) ]4 i0 C! B) _4 E, GEND PROCESS;
END rtl;
+ _; w  ?8 ^2 A0 e/ u
! J5 S/ R( r& b1 z! V/ S9 v8 \: w6 b另一个秒表程序
9 R! i2 n$ l3 X8 I9 a2 F
0 [) ]5 `6 k+ ^6 W4 k太长，以压缩包形式发送。。。。
希望飘过的朋友们也可以发送自己的秒表程序分享下。还有模块化的写法有机会在发个吧。
# d, W9 o1 ?3 y! ~- d

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网上的秒表资料，附几个程序。
- a5 Q) L) F/ h, K
压缩包内也有几个秒表程序，仅供参考。具体更具自己的题目要求改写即可！欢迎更多的秒表程序。。。。。

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