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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.: C5 D$ B4 I% c
. X# G8 E3 L0 B i @Library ieee;. Y; }. H7 ]9 q" [4 |
Use ieee.std_logic_1164.all;
- @! |8 x! T6 bUse ieee.std_logic_unsigned.all;) v) S6 {; M1 P; O
6 [: K4 k9 ]) U& |! Y! S
Entity Keyboard_scanning_2 is
) S+ j2 ?& e& t( B* mPort(+ d# g" S& E# R! Y
clk,c1,c2,p_21 : in std_logic;
, }8 y& k$ h* M: n' K kbi : in std_logic_vector(2 downto 0);. [4 R4 S9 u- \) V1 v% D6 C
lt,p_20,p_6 : out std_logic;
$ C! O/ B; W A j4 a kscano,key : out std_logic_vector(3 downto 0));& _! Q* `7 N/ n$ x9 `( a
end Keyboard_scanning_2;
8 D4 P8 n# _4 g5 v9 @: a( M
# z3 A+ w0 w# o$ M5 IArchitecture K_S of Keyboard_scanning_2 is: X! `/ V+ ? d3 X; A
signal x0,x1,x2,x3,ena,l_p,d_b,count : std_logic;
0 l/ f9 p- z) r6 o) r& K* Lsignal D : std_logic_vector(1 downto 0);. J9 E. v0 ~3 Z; t8 ^' w
signal ks1,kok : boolean;+ u5 v1 z1 A6 k2 u1 `( i( s
Begin
7 m3 c# g) r6 j; ]! Slt<=c1 nor c2;+ M* m* \2 p* ?! Q8 x
# u( e7 o* J: p0 t1 P0 D0 f" k4 Tfreqprocess(clk)
6 ]4 A% b; h+ y; i* b7 ivariable ff : std_logic_vector(16 downto 0); 9 q( O9 Z0 Q2 L# f1 `) t
Begin A9 F, X0 [3 M M
if (clk'event and clk='1') then$ b+ X: ]/ u) P
ff:=ff+1;
- y8 B/ K8 B7 i, E1 m' s; r! y7 L# u8 t end if;
; o# G7 Z7 y' C2 E l_p<=ff(12);
8 r# w# i( A0 j0 v) L5 @0 g, X- a d_b<=ff(13); 8 A! r+ }+ s4 _* K1 y
count<=ff(15); * w4 M& G( }; h9 `- B5 X4 ^
end process freqp;
3 Y8 k1 t( j( H. a$ ~( h& c
, q u7 I7 A" b( j3 ?2 U+ Mdebrocess(d_b)/ T, A* O6 L c9 F
variable c : std_logic_vector(1 downto 0);
5 E% o9 B2 [0 v, a6 iBegin
% D" z, F3 B3 i8 ~" m if (d_b'event and d_b='1') then
" ^% X* ^2 w* x8 j) j if (kbi(2) or kbi(1)or kbi(0))='1' then0 a& n" L: c% k- k1 y$ @
if c="11" then
) Q) ~! S" d; [ ^1 R* U, H" k( T ena<='1';- \+ r1 W2 n: r; \
x2<=kbi(1);
7 O" {8 F5 a5 y! c0 l; l/ ~ x3<=kbi(0);
, L8 T6 K Q% M) [ kok<=false;
9 Y! z, G! E9 Z% I- X else
- q+ S% B3 P4 D c:=c+1;
# C4 N- H% e% y1 z& } end if;
" k/ Q: r; N z& k, ~; ?6 O" { elsif (kbi(2) or kbi(1)or kbi(0))='0' then k. ]# A# A6 f0 W; c
ena<='0';( D& B9 z# l0 c& y2 L
kok<=true;0 M2 t' K {1 [; \
c:="00"; 7 G- \: e: ?7 @! E, o
end if;
& w7 [/ S$ W) {) q end if;& A, i& }2 J W; N
end process deb;3 N/ {) u8 {) ^- }: f! {
+ y! Y D( F, A. [4 O/ |" ~( r9 i$ p
counter_scanrocess(count)# ]9 z/ @6 r0 a/ Z: Q
Begin
1 B: ^8 c) M2 W) `2 T; U$ x: ? if (count'event and count='1') then
7 [, s$ {$ g ^- C1 h) q5 O if ena='1' then
" D; e2 d1 V; d! H x1<=D(1);
1 I$ M6 g( e% {9 [ x0<=D(0);5 R$ M4 B9 K [, \0 y! \
else# ~* d0 a1 ?& m
if D="11" then* G3 e- _% G; T. a' G
D<="00";" h, G: o6 X5 o8 W' F
else
( I+ W* W `# z D<=D+1;- J8 @+ N( t$ `1 m
end if;: L6 @5 a( E' Z5 s9 ` Z2 Q( S
end if;
' f( v, [) x$ L' g/ v* _ end if;
0 z! ?+ ]8 _# i; b& d9 v case D is" c7 s: L/ [% s: ^6 S" y
when "00"=>' y! y' ] y3 a
kscano<="0001";7 w6 T5 w+ q: \' N& v( p5 c
when "01"=>
/ d$ \. O8 V/ Z2 @3 } kscano<="0010"; , l& A& B* n0 K. o* W2 p/ j0 s, X
when "10"=>
8 R# h- s7 d# H6 `: _6 \* F7 T kscano<="0100"; % @: A O5 U( F+ Z- t4 ?
when "11"=>
* {! U6 k3 m: U9 H; y! H7 |' h kscano<="1000";! ` ?2 @8 X$ M0 T
when others=>null;- f2 s4 ]* g2 w% Y2 E
end case;
7 r+ t% x- N' F5 [8 send process counter_scan;
$ [! w) e% B+ z: ^. A( k# a3 u! L
9 I; Q# J6 G# b' |- N! M7 Gld_plsrocess(l_p)
1 _- v t) @, ?; F/ xBegin
( ^0 A/ u# Q c if (l_p'event and l_p='1') then5 `; D4 u- a- m1 ]3 O
if ena='1' then
0 t, A; Y; D; L% S& n) h$ t if ks1 then8 X1 [+ ~- M( ^- [: K
p_6<='1';6 K: [" `; c5 A6 z" o
p_20<='0';# z1 R* [5 K. ]$ g6 [# \
ks1<=false;
, V: c9 h. x* t1 c elsif ks1=false then- C( D, y5 J# m
p_6<='0'; 0 a2 _7 o7 F/ z7 ?7 t; U0 ~$ B& ?8 Q/ ?/ [
if p_21='1' then
" r2 p4 a7 K3 e: W' ~; B8 ~ p_20<='1';* F+ Q0 i7 P5 V0 f! j
key(3)<=x3;0 n) o- r% l7 m( u
key(2)<=x2;/ R& J0 L* T9 o* ?# {1 y; Y9 V5 O4 N
key(1)<=x1;- J4 X! c! n6 W0 t! w
key(0)<=x0;
- P( H7 k7 |* Y( Z+ K/ r2 K else
3 P; G2 H* X0 ?! { p_20<='0';7 c3 ]2 z) C, Z+ U1 N: F8 L7 M: }, t
end if;
" O3 Q( @9 B# \) Z* ^ end if;" k2 @" M- c0 c, d/ u8 u) a
elsif kok then( W, b/ t% X6 P+ ^1 u
ks1<=true;
+ c" g5 K9 G- [ {& g+ N# I end if;5 _# {$ X* z8 f0 L* p
end if;+ T& h5 K4 c! [
end process ld_pls;
" ~7 m4 r1 W4 b2 `* N3 [0 g3 X Vend K_S; |
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