|
各位先進們,老師最近派了一個鍵盤掃描題目給我們寫,硬體架構和老師發的一些資料都在附件中,我有寫出來兩個程式,一個是用Mealy狀態機防彈跳和看書說故事的寫法,不過我很討厭Mealy狀態機和看書說故事,所以我又寫了第二個寫法,用旗標交握以及計數器防彈跳,因為班上沒人寫出來,所以才在這裡發帖,主要想看先進們的邏輯寫法,以下是我的程式,寫的邏輯很爛可以噹我沒關係,呵呵...因為小弟弟剛升會員,所以只有1RDB,希望先進們見諒.
9 Q$ y6 ^2 i- N% O# w ~% _$ o, P/ l7 ?0 x; O
Library ieee;) i. f% ~+ n _3 W, }
Use ieee.std_logic_1164.all;
0 z* \6 O& B) c% @& ]! gUse ieee.std_logic_unsigned.all;
5 |( L' ]% C; j/ a: v7 j- P: w# }, w% y- H0 c' _' ]! U
Entity Keyboard_scanning_2 is
9 Q9 e8 F1 m4 _8 b; vPort(8 n# T p$ V, B% s" K
clk,c1,c2,p_21 : in std_logic;
. j* V8 h; X: b8 U7 ? kbi : in std_logic_vector(2 downto 0);
! m) H$ H% }# R+ E lt,p_20,p_6 : out std_logic;
$ h' p+ h$ e, w kscano,key : out std_logic_vector(3 downto 0));
5 Y- H; X. q/ i$ u8 O' eend Keyboard_scanning_2;. _5 H+ E9 e: W( s
* P p; s, q$ y& |, ?; t' _6 k8 k
Architecture K_S of Keyboard_scanning_2 is
. f' R7 w3 c/ q0 I( r5 R- isignal x0,x1,x2,x3,ena,l_p,d_b,count : std_logic;6 }& A& P5 h* R% U+ O3 u9 s
signal D : std_logic_vector(1 downto 0);
. Q* P3 K2 f1 l/ K% `! gsignal ks1,kok : boolean;
0 }: B5 O! V0 y7 h8 X" n9 q# Q$ o4 @) OBegin
8 j5 @* v8 i& g* W! k4 F5 Hlt<=c1 nor c2;0 O6 N. b( H) C# ?. W. g
" o2 @' ^6 B* s9 h) Mfreqprocess(clk) 3 M2 S8 v6 Y b5 t9 k
variable ff : std_logic_vector(16 downto 0); % q, {6 k1 S B7 J, t1 @
Begin
/ l+ d5 T5 V2 T. z% T if (clk'event and clk='1') then
$ a7 B! i; Q! ~9 h# C( m ff:=ff+1;! L7 }5 D* t0 }/ S o% H
end if;
* H, x0 k: N/ L2 S4 v4 B- ~$ f9 G l_p<=ff(12);
' K" v/ I$ I ^. T0 l q$ N& F2 u d_b<=ff(13);
9 T# N) Z A3 V# q. b2 J- n count<=ff(15); t# V5 x* J, k% K" _" Q g$ e9 L
end process freqp;
/ W$ x, E: e! l4 ~3 B5 f) {
" U" r& G s% J- {* ndebrocess(d_b)
, _/ {' f3 I: uvariable c : std_logic_vector(1 downto 0); J/ }' |+ q: U- Y
Begin
# [4 I( a1 d1 ^; ~ if (d_b'event and d_b='1') then. J$ ^0 X, {' z/ r' K
if (kbi(2) or kbi(1)or kbi(0))='1' then3 w+ G5 s& f6 l6 y) f2 c6 l }/ _$ ~
if c="11" then% i4 W; p+ K5 x5 E$ @' z5 t2 {
ena<='1';
9 ~3 Z% P6 M6 R3 t$ K( N' s x2<=kbi(1);0 K# L4 p2 M( E. A8 v- w% G+ E
x3<=kbi(0);: ]" `9 y$ U$ }
kok<=false;4 F: \& z& I' l
else $ ~3 ^' z: n/ N0 z
c:=c+1;; c" g% e1 k* V& Q: w5 s1 J6 z
end if;
- |% z7 U: G5 Y$ ~ elsif (kbi(2) or kbi(1)or kbi(0))='0' then
1 `0 Q$ [* s' T/ W) h1 ]$ f ena<='0';6 L3 `# c; Y$ j' B/ U+ |' U
kok<=true;) a v+ p# y- P# o
c:="00";
) Y4 C& u8 Z( s' f5 N. ^2 X+ D0 g end if;
7 l7 ^% q* M4 k. A+ | end if;
0 n; @* U6 t% h5 @end process deb;
0 d$ j3 k3 O# e* k4 ]8 _9 _2 M: i A9 N/ y6 x4 e9 U6 \3 \, X# l
counter_scanrocess(count)) e+ [% W" B; W, N
Begin/ \8 f5 W7 c: w# H7 n; C
if (count'event and count='1') then
% J" Q4 i- t8 s; o) K8 p if ena='1' then
1 f* s* P" j ^8 \: R x1<=D(1);
4 n! m. E/ Y; V) A% K x0<=D(0);$ M" e' v2 B+ Q2 g
else# ?: l4 P5 y6 V9 w( Y( N
if D="11" then) c# T, l1 h$ \6 n
D<="00";
% s$ P3 P# t; t0 I0 ~ else
3 K+ s9 N/ o3 @* H# }% Y D<=D+1;. `/ w8 u6 v' S) a' j: y+ v* a
end if;
. s2 v: y% S s/ R/ D5 x end if;2 T1 J) B* A- {2 f
end if;
8 `9 ~3 ?9 H- x5 p/ d G2 G case D is
: ^8 L# y# r8 B% w: d7 Z) ~ when "00"=>
?) ~1 t T" X6 O3 p kscano<="0001";
3 p! x0 S: Z; P0 X# ~! n when "01"=>
: V( C3 ]% n z$ a$ W1 j8 q kscano<="0010";
; u i! L8 } G' \( I when "10"=>
) P4 J9 D) e; }3 H b1 y kscano<="0100"; # b) B1 L. [2 n
when "11"=>
: x4 X; Y" R! x kscano<="1000";5 y" y5 c( w* @+ ?: E+ E
when others=>null;
- F0 C: E, \3 y" ?; s# U& A end case;
8 ?: R& \8 y' t; W3 R+ P6 U) Oend process counter_scan;: V8 W' M+ i% d5 ] ?0 `* Y' B
* ]4 S+ l! G O4 \
ld_plsrocess(l_p)
- N+ d. v% S: Y" g s& TBegin
5 @* a# V. L' P( d0 Q- ~: A. R B if (l_p'event and l_p='1') then
. B" H( B' p& `" ]+ ] if ena='1' then
% {1 r0 F. x7 Q; i% I9 J5 C if ks1 then' }+ L) J* K6 E4 G% @' J( U* s3 b
p_6<='1';
| X6 s9 P1 b% R8 f p_20<='0';
* a+ e1 N. X2 p# T+ s3 ?: V4 { ks1<=false;
/ f1 X$ ^1 n* q* a0 S elsif ks1=false then- D4 u) i' q; _# m
p_6<='0';
8 M' A$ @1 z* D* s if p_21='1' then5 Y% j5 N* l* G% p" a& p
p_20<='1';" Z5 Y( u* \3 p* a
key(3)<=x3;
/ C. i, N c* P3 } key(2)<=x2;
0 M% h) M4 i3 p3 b. b* N key(1)<=x1;
5 N2 _- R6 @8 O key(0)<=x0;
( d8 r. I6 I7 s7 h. w6 J else
6 a- ]2 D0 g$ o1 M p_20<='0';. C% x' x3 H5 d: |5 w
end if;" q6 W0 v. `) Q& a. J2 z t
end if;
* f# ?* t& b: j% m$ ?+ P elsif kok then2 ]0 q4 s* ^! N3 t+ i: N, ^- M
ks1<=true;
; ?( E* R0 R4 Y1 N4 q5 G end if;
% `; W/ [! v1 }( n end if;
6 }+ e. h* L# Z3 l) tend process ld_pls;
/ x! L* W; v8 Y* Hend K_S; |
評分
-
查看全部評分
|