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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.& o0 n+ G/ o6 A! @9 d9 X. ?
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Library ieee;/ {% v/ m0 ^, M% v; v4 [
Use ieee.std_logic_1164.all;) x: ~" B' b& r6 g5 o9 A
Use ieee.std_logic_unsigned.all;
{+ r. r; h& ]- y1 g4 F4 a' v, i9 u, z1 z7 D
Entity Keyboard_scanning_2 is M; `3 t: |/ I6 k0 u6 x. U
Port(; H3 x; w( e1 l# U+ G! W
clk,c1,c2,p_21 : in std_logic;$ S/ Z. \! c6 g8 ^2 s
kbi : in std_logic_vector(2 downto 0);; ~: k" m4 S4 s
lt,p_20,p_6 : out std_logic;# `" v3 M( ?3 U, p
kscano,key : out std_logic_vector(3 downto 0));
% N' A! C" c# ^( } @7 J p) mend Keyboard_scanning_2;
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Architecture K_S of Keyboard_scanning_2 is& _8 m1 C( }1 w: f1 Z6 S p
signal x0,x1,x2,x3,ena,l_p,d_b,count : std_logic;
0 ?. @. Y" a* f6 P9 |: Rsignal D : std_logic_vector(1 downto 0);# M' U: V) E% ~4 S
signal ks1,kok : boolean;
( }8 x5 {( c/ A. |: Q6 [4 o8 U4 |Begin; ~0 d/ g) z( V
lt<=c1 nor c2;8 i$ k6 U5 ?" o! d* D% E$ ]# D G
2 U% \; H4 W2 P& ffreqprocess(clk) 4 u0 R5 m4 Q7 J. z. A) l, R, k
variable ff : std_logic_vector(16 downto 0); 5 ^! _! O5 S% k- J k
Begin
5 E/ a# t& K7 l( \5 c- @) @% N if (clk'event and clk='1') then2 g1 T. }8 U( d' I: L6 C$ j7 d
ff:=ff+1;' e9 Q- a3 t7 ]0 T, f5 D) @4 t3 r
end if;
- {+ R9 z" `" `: @& W! ^ l_p<=ff(12); , X B) C C7 V/ F
d_b<=ff(13); . } t3 [- y5 r0 M1 N
count<=ff(15); + ?. D) y, n& C; q& V, U% l
end process freqp;
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debrocess(d_b)6 N2 Y( I; |9 u0 N; X2 z# y
variable c : std_logic_vector(1 downto 0);1 E, Z( ]$ @, p
Begin/ S* n* H8 t& t" i3 y4 H
if (d_b'event and d_b='1') then
+ O9 i+ Z" t3 F: | e. ] if (kbi(2) or kbi(1)or kbi(0))='1' then( }+ w* q5 f+ d$ D; W: l2 c5 q1 b
if c="11" then
9 D+ { f7 B; } ena<='1';3 ~7 U. T- C# e) q0 Q. k
x2<=kbi(1);6 z) Q8 |2 a/ v
x3<=kbi(0);7 f. b" T' H1 Z- m. b6 j
kok<=false;
; H3 L; J2 C- R t! ^$ E else ( N3 m: R9 \6 _% q( C# `; v1 n
c:=c+1;- u. t' Y# _: S* Q
end if;
- u" S. x! P% W; Q3 K. m elsif (kbi(2) or kbi(1)or kbi(0))='0' then u7 K4 v4 }5 `; f
ena<='0';
\8 f, X& d5 t; p" w0 B kok<=true;
5 e3 \; Y$ b5 _2 E8 c: e! P6 w4 W. w: _ c:="00";
/ q) |, x$ ]) y% X' P& v! @ end if; N& p2 L. o" I* } q
end if;: c/ R5 a5 E c4 F
end process deb;1 y/ A" O+ n$ U) ^8 c- `
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counter_scanrocess(count)
; |- G2 w. I# Q0 EBegin8 E. ~8 W5 W, h* c; f) ~* T
if (count'event and count='1') then) p( p' }* _2 m; T# _
if ena='1' then
- z% R, p0 K; J, X/ |8 ? x1<=D(1);
3 ^9 J0 P! m, t" I x0<=D(0);
7 h1 e4 B! o, U) p" ]) f else9 K/ n5 ^: l# S5 {# }* i4 v7 R, M4 K
if D="11" then
5 i( l, C2 e3 [8 L# x5 m9 H D<="00";8 G; W( \+ [" }: |, H6 E
else " |) o; y! s/ K6 A/ Q) s' R1 C& g
D<=D+1;- C0 o0 }, `( P9 r
end if;6 O. c _; U" Q7 m" j
end if;) {' w* M6 m4 v7 y$ W0 K6 w
end if;
( L( ^4 z; f9 t1 | case D is8 d0 u& m+ K+ W2 U5 T' G+ N& L
when "00"=>
& [$ u) {/ L2 A% E% ^ kscano<="0001";
6 ]: Z: I* |- F* v when "01"=>
2 h" g8 j! K5 a: v5 r kscano<="0010"; % C6 r- j- P" i$ h2 ^( x2 ?
when "10"=>$ h9 P- B1 p0 M
kscano<="0100"; & C6 y/ w, K$ \: B# i4 u
when "11"=>
% S9 Y) Z; d5 ~3 a* u# h kscano<="1000";$ l& U* ~5 S ]' N, G! k' c" P
when others=>null;
; l: U# T. Z) h% O9 y+ s) V end case; / P8 k( a; K# ]/ b1 o. A
end process counter_scan;
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ld_plsrocess(l_p)
0 \5 f2 S9 H& K3 @+ F% tBegin; f$ E/ Q1 A% p8 {4 B
if (l_p'event and l_p='1') then
/ }' x) W, Q' C6 p if ena='1' then" n+ U/ N/ K2 w" h
if ks1 then
1 _3 d4 v$ d5 r0 o, Z p_6<='1';
# U& [* _$ M. X p_20<='0';
* Z. {3 a8 W# t9 D9 l' V& B- J ks1<=false;' T# @+ s1 G6 `
elsif ks1=false then1 n: f4 r, R2 _, c$ J
p_6<='0'; " O/ X! W+ ?8 h% ]
if p_21='1' then- K9 e) u b, g' d
p_20<='1';2 o' D/ U: W m* K8 E5 n
key(3)<=x3;7 Q* l* b; Q1 g0 ~1 I4 d
key(2)<=x2;
' |( q3 j" G; p5 Y5 a key(1)<=x1;
, A+ Y& u1 z, f# M key(0)<=x0;% @8 N3 {8 @5 m0 f8 Q
else
% h4 Z4 V, V* I5 f2 ?$ I- _1 t$ b4 D: G' j p_20<='0';
( r x+ K1 s4 F, d end if;* p; `4 R6 \8 x( [6 g) u
end if;
; |0 N9 ?% b) C0 p, P( G. C$ l! t# _* } elsif kok then- z; L7 u" a2 y1 n8 ?* \$ v
ks1<=true; 1 \. m" q7 ^/ b5 i( c1 d
end if;
- k# j( t' O! Y, @ end if;
0 @! G3 }7 C0 m: t1 K8 W5 cend process ld_pls;, l! {5 z% p# y1 L7 V: Y
end K_S; |
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