|
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.# Z) B8 X4 X3 r( u% m6 _
( ^1 B$ ^8 g" v/ i
Library ieee;
H1 b$ |; O" \8 I9 a" rUse ieee.std_logic_1164.all;
1 `" Y/ A2 m# P! n" AUse ieee.std_logic_unsigned.all;
9 r/ i4 S. X2 }/ q' @3 e- |% g3 q" p! }1 K; R; Z5 U$ `+ ]
Entity Keyboard_scanning_2 is( L/ g% k5 M, P6 G6 n+ M
Port(5 S7 M# j# C1 g( s2 S4 C
clk,c1,c2,p_21 : in std_logic;6 R8 V. O# X! C4 u/ b0 f8 X
kbi : in std_logic_vector(2 downto 0);% ^" V' S0 W9 B3 K$ g3 i# z
lt,p_20,p_6 : out std_logic;$ ?% }* P1 y$ c
kscano,key : out std_logic_vector(3 downto 0));
, c; x7 M. c) L8 q( aend Keyboard_scanning_2; B4 t7 o. @! ?8 {5 B% h& i5 Y
" @ Q* @$ H. P
Architecture K_S of Keyboard_scanning_2 is9 }' ~/ K4 @1 t$ D' r- v* E! _" C) E& X! T
signal x0,x1,x2,x3,ena,l_p,d_b,count : std_logic;
9 B" B: _ f2 }7 Y9 Y' F; }; zsignal D : std_logic_vector(1 downto 0);
! j0 M* ^( F$ vsignal ks1,kok : boolean;3 K& L" x% W, N$ \
Begin
8 J$ w s K0 V" ^9 xlt<=c1 nor c2;
2 `" ?: d% h3 t! U+ d
~2 [4 q4 u8 ^+ c8 A9 x/ V. |freqprocess(clk) ! G0 _1 f$ n" L4 j' o6 P
variable ff : std_logic_vector(16 downto 0);
, D' Z& \6 a, G5 MBegin
5 @* H6 `2 D/ Y8 G; s4 [6 B if (clk'event and clk='1') then' c$ d# [6 H7 x7 W; a& M
ff:=ff+1;8 ?2 n! p4 H# a- G! [# G
end if;( R' F9 ~! O. E) \! a+ c$ C# y2 M
l_p<=ff(12);
! |8 Q" U2 `, B# Q5 I: Q d_b<=ff(13); - u6 Z- V( ?- h2 v1 Q
count<=ff(15); ' L! Z( ?; z4 s! I5 Q" c: G
end process freqp;! M2 F$ e Y, u, p
$ q7 R; J2 i( e9 o' u; G6 h
debrocess(d_b)
1 _$ [8 c" v1 U* O! j: e3 Wvariable c : std_logic_vector(1 downto 0);
8 E$ ?$ t0 p7 v* Z6 g+ UBegin' f+ M! r1 ^4 e9 ^4 b% a
if (d_b'event and d_b='1') then: a2 U r0 n+ P) r! u
if (kbi(2) or kbi(1)or kbi(0))='1' then
9 S( G9 g0 d# g4 O! K4 S if c="11" then
& j8 J2 p0 A6 G1 d" @' m' Q ena<='1';
# L$ ]2 L4 p8 T; k$ w x2<=kbi(1);
0 H; m: u0 U! d4 T! K; L. L6 j x3<=kbi(0);
1 s% ]; t( D! {/ u& M) Q kok<=false;, t# y5 j8 s& h( n* t; X
else
) W" c/ Q5 Y* U/ K; E0 i! U+ u! d c:=c+1;
9 z3 h0 ~; L4 J" U, ` end if;; _2 n& ^. m, i7 ] h- W/ A
elsif (kbi(2) or kbi(1)or kbi(0))='0' then
. D0 Y! F+ n. }; Q' F* g ena<='0';8 R4 D2 }0 {: E' p* R" ^) y
kok<=true;- A! u7 W6 f1 N, {4 h; a5 i
c:="00"; 7 G: j7 G# G. M5 ]+ @& F$ s% t9 c
end if;
7 Q- d* D. E$ Q# f8 L' z$ N end if;! A j, g* S. R2 z& o2 d
end process deb;
# l' V& x3 T- c3 e1 o$ n4 ]) i) e0 R5 q/ C5 {" M
counter_scanrocess(count). V) V0 m) ]7 a+ J0 k% o
Begin
9 F! n9 t- d. { if (count'event and count='1') then4 h1 w5 |, o& |
if ena='1' then- a$ o5 I' D+ A5 n8 f% I, u- c
x1<=D(1);; ]/ |4 z& u( V/ }- c; O. n
x0<=D(0);
8 o' e. W2 k7 @4 e7 z! C else
3 H) a# w, _) W& W8 g5 i if D="11" then; |" a: H1 \9 _) e( p# }
D<="00";' I3 W$ g2 y- o9 V9 G9 V8 C9 H
else 7 `( [3 i: P4 w4 E/ S
D<=D+1;
8 E! e1 H6 D8 k* X4 O3 P1 b, E end if;
F2 j% @1 x( t4 D. a end if;# n n% V9 w4 R$ L6 d9 V8 R2 J d
end if;
& M7 h$ Y# e/ H' }8 s- U case D is+ E+ J3 X: g0 d! a, h: u# m7 Q
when "00"=>
/ x( r: g# c2 X/ }2 q. x _: Q kscano<="0001";! ~: V8 X2 G! r
when "01"=>
" l3 i L0 H+ f1 Q, F6 L kscano<="0010"; 2 m5 t- i4 i6 P- d, X9 m
when "10"=>. {. o5 _0 E& @+ T
kscano<="0100"; 8 I! B/ z2 {& T9 h, X
when "11"=>( f7 y. T0 g, ~ e' ~
kscano<="1000";
9 J; r; I* r' }8 U1 l when others=>null;
: n- E9 U/ q! e" ^ end case;
7 r! R4 z8 W6 `1 f; D2 o' Send process counter_scan;' N2 X: g4 o! R4 L8 Y9 |
1 f5 d- ]1 W5 p" Z' d+ @
ld_plsrocess(l_p)7 B. n# \7 c. q- I7 t7 |, c
Begin
. T' Y+ w) d& s4 x if (l_p'event and l_p='1') then
# s) X* z' h7 }/ u7 D! W5 e! R4 T S1 f if ena='1' then
) m# \ ?1 H6 s: N9 J6 f9 l if ks1 then0 T/ U E6 r- \ {: D @
p_6<='1';8 D: N0 C4 M: C5 c: F( p- p3 W
p_20<='0';0 y7 Y0 Y T1 r! `6 x/ Z Z
ks1<=false;
8 N; s. o( K" L+ o/ G1 o2 m. E; h elsif ks1=false then
5 G- T7 m2 s; U3 Z5 G4 H6 x5 @ p_6<='0';
3 v; i# Y' {. z/ y' _: d' R9 x, A if p_21='1' then3 `% c' U" A9 g8 C- r8 K7 }
p_20<='1';
+ X" y' p: t) G! ^ key(3)<=x3;
5 E4 c% @1 c6 m key(2)<=x2;+ w) d5 |0 ~! s1 g- f
key(1)<=x1;- \9 s g7 P$ }3 r1 @
key(0)<=x0;* H& D$ P2 ]' i) b3 N; l; T8 q5 S
else
: S! |: k; q2 j6 @2 c) x) f p_20<='0';# B) C2 k3 z* P& f8 C' z
end if;# K" C: F2 B5 S
end if;4 p6 N( I& k y8 E1 U
elsif kok then
* u& }" x! K: T1 D ks1<=true; ( [7 k% o, n, ^1 c8 C- r
end if; D5 I e3 Y4 ^7 ?% y' }
end if;; M W5 ~" U( O! o" ~; {
end process ld_pls;
" [' a3 V. O- f+ Q1 h qend K_S; |
評分
-
查看全部評分
|