|
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.
( s. c4 s/ ]7 `) a
" b; q' b. T4 T$ ^) ?Library ieee;& h3 l& g- `7 y; i! R* C
Use ieee.std_logic_1164.all;
0 g5 G! v9 r' z% y# }' b6 H" YUse ieee.std_logic_unsigned.all;
+ X0 M, w. ~% I F* [% p: c+ s+ C( ~
Entity Keyboard_scanning_2 is
+ r$ Y' ]( u" H. @) X4 fPort(
: U( ], i' X7 v0 e0 S n3 z* J clk,c1,c2,p_21 : in std_logic;
4 o5 Z& U* U1 G# p# A1 H& M kbi : in std_logic_vector(2 downto 0);
2 P( T# ~ z$ J) p lt,p_20,p_6 : out std_logic;; F$ Y* U% C- |( @# m
kscano,key : out std_logic_vector(3 downto 0));
: a8 j# Z4 }' b9 Mend Keyboard_scanning_2;" Q( A9 a, [7 }3 w" ~. k9 Q! G
7 e& \' C+ f5 h0 ?# u5 o2 C7 U
Architecture K_S of Keyboard_scanning_2 is! k+ N; [- ]7 ?9 k7 L
signal x0,x1,x2,x3,ena,l_p,d_b,count : std_logic;
$ g a! M% D! Zsignal D : std_logic_vector(1 downto 0);
6 e& n, k- t9 W# K- e3 nsignal ks1,kok : boolean;' R, k2 V* ~6 ~2 g0 F0 [
Begin
2 r& Q- Z% y* K( V. G. rlt<=c1 nor c2;
1 f% u$ U- X- k" r9 M( E3 ^( U
8 {5 N0 F! s, |* S7 R6 Rfreqprocess(clk) 8 N8 X' k" q9 w" q) K% q/ W
variable ff : std_logic_vector(16 downto 0);
( w" I b9 a( B8 j& P- J% QBegin
& x" G/ Z* ^; _, n* j if (clk'event and clk='1') then% R' ?. j# C$ j& H
ff:=ff+1;
* s" {) |4 o% {% w* G) n; S9 u end if;
3 w2 M8 i& K h& r9 E6 ]" x9 Q l_p<=ff(12);
0 ?3 B. P( |1 Z$ N d_b<=ff(13); 3 i, c- u+ M8 C4 Q
count<=ff(15); ( n. M2 g. A0 N3 F! }- V+ n
end process freqp;
4 @0 H, Y) h' J9 c' |( l" P' I; _
7 A, [% h3 L0 Q- S0 T; Kdebrocess(d_b)
; t% d+ }' W; n4 kvariable c : std_logic_vector(1 downto 0);1 s6 I3 ]! W: T7 z/ Q; O3 M$ D* e
Begin
6 v1 W, c; ^; ]8 }( W if (d_b'event and d_b='1') then
( J* }, H9 v' }0 _0 ?+ G if (kbi(2) or kbi(1)or kbi(0))='1' then
2 m' V. A" d9 s0 K; u1 R% ] if c="11" then
0 k( T9 W6 f" c( Q. C) x2 Y ena<='1';
9 O0 ]" I9 n- G+ U' z x2<=kbi(1);
# R. f5 K- A% O% g a4 h' N x3<=kbi(0);
( F* R. I1 D: O kok<=false;, d& U# p7 Y* k# `
else " {. R0 _% m$ |" Y7 S2 M
c:=c+1;+ v: P* f/ V" G
end if;
0 F' W6 b2 ^" M3 l9 D: s elsif (kbi(2) or kbi(1)or kbi(0))='0' then
# x( u ^9 F, J) ~; u% [" g ena<='0';- Y1 p% x& e+ L: b! G; t7 e
kok<=true;
9 x! w6 A+ a+ ^7 U" S) e c:="00";
) \& b9 E1 K9 I2 f q0 {+ J, k end if;
) L* H5 H+ q; x+ r# a/ d6 q& S$ R end if;
/ E& X& i( F; v+ Q- ^end process deb;
$ m7 r# B0 c& }0 W9 ]! e" ]" u E: o3 x$ S6 {' U, `% n
counter_scanrocess(count)
3 p1 e! m" R+ k. i5 J- kBegin
- O9 M# r: _* H" h, A& Q- `8 k# r if (count'event and count='1') then! y6 Q* V7 z. j1 A/ {6 e
if ena='1' then/ R- g+ p3 |; ?% [( {" ^
x1<=D(1);/ c% u: R: T8 |
x0<=D(0);
; g9 @. L. L0 T else
( n2 n4 X* W0 a8 l- i3 |7 R) m* | if D="11" then
) u- u" q m$ e) J$ s9 r! G D<="00";
7 N o& b& i' d else
& p) X; k8 @0 I+ K& R D<=D+1;- g# |/ x, {: f
end if;. q8 ]8 B" ]2 \, x3 q8 y
end if;
1 D8 d+ n. g2 s end if;
7 t- t5 o8 n" N' w" h7 g. A case D is, F$ [( j3 g: m) {4 \8 c( `! f
when "00"=>
k/ ^/ W" v' F kscano<="0001";2 J6 i1 R# |9 A% {0 {9 C
when "01"=># I- x$ r( B& b2 [: d5 d
kscano<="0010";
, b& h( r- H9 g when "10"=>
( p( D. t% j& Y h3 e6 [4 b kscano<="0100";
; G& L) w' d& `6 Y! R when "11"=>
& q/ n7 a1 z0 R2 g& O% S kscano<="1000";
" S- F: a+ R7 L, D6 t when others=>null;& k7 V1 S) a5 M# ?6 R& z6 N) B
end case;
! u: I+ T$ e2 gend process counter_scan;& D. A, G( }' o( ?* e
6 E% H! v4 v3 R& kld_plsrocess(l_p) X8 q2 V* y4 m6 N3 C+ ?$ S: d
Begin: p( v% ~5 `* a7 S( ~
if (l_p'event and l_p='1') then- S& E% n- R5 w0 s- n8 @, M
if ena='1' then3 X4 ^# B4 V7 z
if ks1 then+ d: j: P. i# P# P6 v7 E
p_6<='1';+ y$ S) |! r5 o( A3 d
p_20<='0';( u3 I/ n* R2 s! z5 _ ? |: G
ks1<=false;
& ~ w, \8 d" C$ v* }; R$ n elsif ks1=false then
1 [8 O5 ^1 R% x3 } p_6<='0';
c& t. L7 u2 p8 j if p_21='1' then! c5 Z6 p! z& Q( a( Z9 G5 O
p_20<='1';5 \) ]6 C! I2 `/ }. e9 L
key(3)<=x3;7 ~4 A0 a1 l. N+ R
key(2)<=x2;
/ V1 r4 E" x6 V, }( | key(1)<=x1;& S; q" u( S o3 a. e. l) F$ i
key(0)<=x0;
5 s6 q" U3 g, m! K+ G0 N else
, X" J5 Q% F/ E- ?& K0 E p_20<='0';; J# Z/ W$ z( ?' j( Z) }
end if;, K5 J+ q1 j n j/ O* b4 ?
end if;
s% x% G2 f! X# } elsif kok then5 U, X3 T6 t1 b: K1 w
ks1<=true; 3 e7 t. }3 r; b8 ?; }" g
end if;
& X0 H- S3 p7 i5 H1 p end if; `) R* a: u+ S4 e6 _
end process ld_pls;2 b. P% F. j* i& }+ i. S
end K_S; |
評分
-
查看全部評分
|