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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.
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# j3 W( b# f# u0 x' QLibrary ieee;
, f( c2 T$ e# L# ^4 u, n: bUse ieee.std_logic_1164.all;
9 D4 R' }# ?4 [7 U" JUse ieee.std_logic_unsigned.all;/ B F, z; Z% F% ?, n! A8 x0 o
5 V% M; x0 X9 q; {Entity Keyboard_scanning_2 is' N0 |$ k4 M0 @- h, d! ~' Y
Port(: p4 I6 Y1 }5 z: c2 ?0 `" E
clk,c1,c2,p_21 : in std_logic;9 l- V6 B( }' ~" h" |7 X0 j6 K
kbi : in std_logic_vector(2 downto 0);: {, g/ g& j& r0 I
lt,p_20,p_6 : out std_logic;' A( n" F: @) D# q# ?$ p
kscano,key : out std_logic_vector(3 downto 0));; V0 Q, g6 [! C% a! c
end Keyboard_scanning_2;2 F* h$ |3 p" @6 W4 E+ A0 z5 @3 V* R
3 g+ I* q& V; t! w/ I
Architecture K_S of Keyboard_scanning_2 is
9 r5 I4 i8 F! B2 Y3 K8 Fsignal x0,x1,x2,x3,ena,l_p,d_b,count : std_logic;3 Z$ p: x4 E: L7 u
signal D : std_logic_vector(1 downto 0);8 ]. _& G; _: [3 J
signal ks1,kok : boolean;
4 u. y1 R+ z' L, a SBegin: N, q0 p! c6 @6 q4 L _! {" e
lt<=c1 nor c2;
# N# U8 n* K) T, R h& R, w
, k' b |0 W9 v- f3 ~freqp rocess(clk)
& `! R$ d" U( s. v0 ?variable ff : std_logic_vector(16 downto 0);
8 V8 M* b8 W! B1 \Begin6 f/ s& a4 {2 d5 s# b
if (clk'event and clk='1') then
. l2 c/ _+ B! s$ U# O ff:=ff+1;3 c, O1 Z* z7 r& P+ }
end if;
, z$ Y( z7 p0 V( a3 h- ] l_p<=ff(12);
0 G$ E0 D7 s: w d_b<=ff(13); 0 T+ f' i/ [% a
count<=ff(15); ( `$ q0 \! }/ O' B" s' w
end process freqp;' D, m/ b' B3 Y& G" p
3 d1 m1 T2 H( O1 W
deb rocess(d_b)' D4 q" b+ w7 d$ {+ J# K
variable c : std_logic_vector(1 downto 0);
Y- Z% x" S0 GBegin
% ~8 N# e5 S" y if (d_b'event and d_b='1') then
2 ] i% m. a/ L2 h y T if (kbi(2) or kbi(1)or kbi(0))='1' then
. m* |' g' I% s1 I, e& J if c="11" then3 C7 o( L; n; K4 I) E
ena<='1';; C$ ?3 q" q' r/ G+ G" [5 Y
x2<=kbi(1);
; Q; s3 h% {. _- a/ ?8 k) Q x3<=kbi(0);
' F% P M# X, r# r' p* Y# ]: c kok<=false; H+ g: V+ ^, p" F9 b$ Q/ G
else
) X0 |) R B1 a0 ~" N ? c:=c+1;. r& X* O1 u! ^7 | _) H
end if;7 i# j; K' B, Z
elsif (kbi(2) or kbi(1)or kbi(0))='0' then
: A. [1 M8 {6 _" |9 Q0 O6 D* J ena<='0';
+ @- e$ A0 E: j5 \- W' O kok<=true;
" s# L/ {7 }: t5 n c:="00"; 7 u+ n6 j0 F' A/ j; [
end if; & P) I( f9 b5 M/ I, v) U
end if;3 k# r. G, `3 Q4 q
end process deb;
) y* ]9 T4 ]! r% d$ `2 z
9 `3 S$ d! m0 \4 s7 S+ [counter_scan rocess(count)7 F2 U! }$ o q1 i: q: E& x5 f7 ~
Begin
% t+ n- `* F) x0 a, ]& J: r if (count'event and count='1') then0 n& W9 K( b" r2 l( R
if ena='1' then
% L( n. u( i0 K% p% |$ t x1<=D(1);! e7 I; Z5 ~: ^& Z/ ]: n9 G
x0<=D(0);
9 ~; G7 W3 v. E8 t else
, }9 n! L; Q3 u, e if D="11" then1 q/ z' z6 ~3 }) R
D<="00";
8 N0 z9 X* O& W( T& _3 m/ {# X else
1 s" d1 U ]7 U+ V. w9 @ D<=D+1;. Y' A, _/ v. d
end if;
* R. q1 S L9 E+ T' ?( c& | end if;
7 }# s0 a6 o5 H- Y7 J+ e# A8 Z0 O end if;* X* h7 x: i* G
case D is
2 L) u7 S1 H1 N _9 _, w: a when "00"=>9 [; B6 x; j) G2 v5 a
kscano<="0001";2 a. ~( D# U# V: M0 i! i+ O) Q
when "01"=>
9 u6 l; M; @0 K- R+ h( a kscano<="0010";
# U: U5 c6 D7 g. | D8 t5 ?( c/ [9 ] when "10"=>3 U0 b9 h# D0 \# b& ?
kscano<="0100";
+ N+ f: k+ l M8 d when "11"=>/ v Z7 F9 t j4 |
kscano<="1000";
3 ~- T) y: j* K1 O! ~- n when others=>null;
9 \3 E% n7 B& z end case;
/ g' Z9 t7 n, u, o7 f, Q: Eend process counter_scan;/ ^9 @) B8 `4 _2 f6 _& S
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ld_pls rocess(l_p)
0 O+ E$ N o+ @& @) }; Z6 ~Begin- g6 x0 b% I9 u. z/ S) N
if (l_p'event and l_p='1') then
0 q, H, Q: L; C7 J2 d \ if ena='1' then
. W7 S" |$ ]- a' Y; {" I# W z* e if ks1 then
* L, J9 D) ?) c1 m p_6<='1';9 N2 T- [" Z. {7 S* C
p_20<='0';
8 J* S: L' ?/ X& K9 Y: d2 w) F ks1<=false;# s r, w, G* n, q1 S. \( s: ]1 H- B
elsif ks1=false then
4 e4 q! O$ A9 O1 ~ p_6<='0'; 6 R$ h# g% h1 x
if p_21='1' then
8 n; h/ T2 V' ^) B3 i1 G: F' ]# G p_20<='1'; I8 a5 x6 G! E, @
key(3)<=x3;
/ f% F: Y% W. G% G# I) [) w8 H key(2)<=x2;
" A4 c/ O% Y# Z7 M key(1)<=x1;
7 c/ b* B0 I0 r" l key(0)<=x0;! P. ]3 @% G' Q- l" K' F& W
else
" s1 ]) N' \+ u* }3 \$ d+ N p_20<='0';8 y0 r+ g* O v
end if;" J" ]" f, ?$ \% J6 R
end if;. H( y% p9 m+ D
elsif kok then2 K; }; F8 |# K' I/ f1 w
ks1<=true; " `- G( F; D- L8 B- a4 ?
end if;
6 z+ [5 {4 R1 v& t- i) `0 Y7 M end if;: [. w$ ]. l" k, G: {- Q
end process ld_pls;$ j- b f+ @# d5 o. y
end K_S; |
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