|
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.
& o% i$ S# o8 T8 F5 g0 r2 Y
1 r$ Z" v& U9 _. K4 F" |Library ieee;0 G5 B$ ^4 W7 _; ]9 B$ ^1 l
Use ieee.std_logic_1164.all;4 f% T9 n2 } Y5 R+ l: A/ R h
Use ieee.std_logic_unsigned.all;
4 `/ _& X$ H% v @; u
& W( I( x: O" K0 f% K5 WEntity Keyboard_scanning_2 is! h" A8 k( X: q! Z
Port(6 T% ]" a" C, P% m( }
clk,c1,c2,p_21 : in std_logic;
/ |5 E: N0 M( d! R, ]: B2 G- R kbi : in std_logic_vector(2 downto 0);& n2 U8 B6 D0 C3 k( D7 A) Y Y
lt,p_20,p_6 : out std_logic;, R7 s! P$ }/ ?3 C+ H
kscano,key : out std_logic_vector(3 downto 0));2 _3 u) i1 s, H/ D8 S6 v
end Keyboard_scanning_2;
* C8 y+ @# ?# l* V; A) P2 J1 h1 x# t
Architecture K_S of Keyboard_scanning_2 is
. [# M5 Y( z1 b& m" O, n3 vsignal x0,x1,x2,x3,ena,l_p,d_b,count : std_logic;
" h4 `2 D7 L. jsignal D : std_logic_vector(1 downto 0);. a y& w: \2 b3 k+ c1 K' B
signal ks1,kok : boolean;" K/ O; Z; B7 t7 _" g ^
Begin
/ o' F3 |0 a$ f6 c8 ]1 A% P+ ^lt<=c1 nor c2;
7 M; T; P; e! L( E4 v7 s8 q% @3 U/ X1 O
freqprocess(clk) / N; O6 B5 X6 I
variable ff : std_logic_vector(16 downto 0); , u: h/ d/ X9 g0 s4 u7 y
Begin
0 l, e/ f4 v6 X' R8 A2 H, i if (clk'event and clk='1') then
L. {1 x9 X8 ^& g ff:=ff+1;2 }8 |7 I% M ~0 F5 Z& T7 f
end if;
! h! |/ G1 o# _5 i# V6 \6 R l_p<=ff(12); 5 L* ?% _. B7 @; C4 |9 S
d_b<=ff(13); / t) v$ G$ I' j* _
count<=ff(15); " x2 ~* Q" Q4 l% \9 I) R h
end process freqp;/ Y, o% ^) Y+ y8 H7 X4 d% g
7 b# t: `6 b- Z' l- Fdebrocess(d_b)
C2 m; d3 b. B8 F, V& n) g( Avariable c : std_logic_vector(1 downto 0);
4 ?( l/ n, m, \7 t, O4 h _* S. YBegin' b; n$ _# G6 P6 |3 m! v% h
if (d_b'event and d_b='1') then
' c: f. i+ L" r7 U, s if (kbi(2) or kbi(1)or kbi(0))='1' then! A/ q- Q, j. k: a
if c="11" then! e2 E0 l, M/ h3 x
ena<='1';& W8 P. l$ J5 U+ N
x2<=kbi(1);
6 J4 T8 s4 T D$ J x3<=kbi(0);& |# `: [6 H# x; n9 D) v
kok<=false;
( {: C1 A! }/ I, [& A0 ]# i else 9 u0 L) G$ p/ ?* [ ]2 j
c:=c+1;& |$ ~$ ^; C3 w; s% L
end if;
% l j8 O; C1 b- Z2 m& _ elsif (kbi(2) or kbi(1)or kbi(0))='0' then9 L! }& u9 G) v0 [
ena<='0';
, q9 V1 s" f1 ^2 W% P: J0 b! m kok<=true;+ O! g! V4 O7 ?
c:="00"; + h; w0 ?- r1 s7 z- P0 r
end if; # p# \ x) s* b& S7 y8 p
end if;" b* r c$ q' V }/ ~- ?* X' n
end process deb;
! P8 d/ ^$ U* R! b, S& J5 c$ F2 q3 d0 L- z" O/ {* O6 N
counter_scanrocess(count)/ M' @( j/ ]& P1 B1 g5 x8 Y
Begin
' {8 ^8 U, o9 d& b# [! [+ Z, w if (count'event and count='1') then; k, j9 }( b* b! _% R5 s
if ena='1' then
2 B9 M, s' A+ } x1<=D(1);
4 s0 B9 [* h* i2 W7 H6 q$ n; Z& z x0<=D(0);" q3 c; E r% @: [; A1 t! R6 L
else
2 @* E0 x" [6 x" J _ if D="11" then% c. `& P* ^; K( u4 @2 Q
D<="00";8 X1 \1 z. w' {6 u
else , y# a; L" T( w1 P
D<=D+1;4 ~/ t1 N G/ Q) j
end if;. r; S# K' I3 l- S, {3 J j
end if;$ z# i) j8 a0 P1 }! |* _
end if;) r! B+ R# P9 |, x* x" j% k2 I) ]
case D is
: R( l4 t9 p1 h6 b* ^; Q" p when "00"=>
" D: a* ? m: j' _' D' g kscano<="0001";
; \4 n4 p. C1 ~, X0 ] when "01"=>9 p+ y/ e- O* Z6 W, q$ N4 w
kscano<="0010"; * q. Y. {2 e4 P U* J) E$ F# \
when "10"=>
7 ?, v L& n: ]6 Z2 M1 a kscano<="0100"; v' _: ~4 i- v' Y
when "11"=>/ V2 `* \# K+ M; x7 W
kscano<="1000";$ T! ]5 r- s$ g
when others=>null;5 C2 n& D9 |# H1 C- `9 K6 g
end case;
) V% J! H( `1 i: R+ p# L# K! Uend process counter_scan;
* p, R; k- R8 X2 ~; e4 S4 O( ]- j6 x% @/ L
ld_plsrocess(l_p)
% Z9 b7 y/ i1 r2 kBegin1 F0 w6 O' S* a+ U
if (l_p'event and l_p='1') then8 c) P$ [6 K) y g4 l
if ena='1' then; u O4 V z+ u: Q
if ks1 then# e$ C( \$ A) B2 J% T# ]# L
p_6<='1';
# v0 n: g- Q9 `! l p_20<='0';. T! t6 E) R8 e+ t
ks1<=false;
2 H3 C% t4 @7 ~( h0 ?# Z! e( t; ^ elsif ks1=false then% p I8 Y9 {5 s) {5 r" E0 |
p_6<='0'; - n" d2 s8 N3 c T! |
if p_21='1' then( A5 Y3 Z4 ^- n2 o1 c+ t; O5 s( N
p_20<='1';
6 r c9 s: n; _7 |- b, o" H key(3)<=x3;) u! E4 k) J% U0 G Z9 o
key(2)<=x2;# B6 F5 x4 e) z% E
key(1)<=x1;* n$ ]" s( Q5 n! s/ E
key(0)<=x0;
6 X% k7 ?, M- I3 N; @4 T else6 u- l7 n* k" |; [! [( i
p_20<='0';) n0 a: `7 q% T% s7 o: J2 R
end if;( E5 L6 p% ^' f# p
end if;
0 |5 \& ~ E6 V. P% {8 e elsif kok then; u+ g. l4 M6 M# g# C& J& P, w
ks1<=true;
( I' H& a$ y5 R3 S4 E: T1 p5 Y end if;4 i" H7 L/ r2 \* ?' d: F
end if;
9 e2 G1 @, ]! Dend process ld_pls;) K: S1 j9 T9 n$ R
end K_S; |
評分
-
查看全部評分
|