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: J. A" X$ f( ]" D+ K前面的部分請自己加入宣告
$ {# Y) H+ u& a E2 |( l7 I% d基本上這個code應該會動,如有小細節有問題自己改一下好了
( }; ~7 k9 k/ d9 @$ k另外這個code假設開關沒有彈跳且電路有額外提供一個clock source
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! c7 o" m+ l& Q; H" O( d) K# Dconstant dig_0 : std_logic_vector(7 downto 0) :="xxxxxxxx"; --請自己定義共陰的信號0 m2 o' }. g# a u6 Q: S
constant dig_1 : std_logic_vector(7 downto 0) :="xxxxxxxx"; --請自己定義共陰的信號3 c" e D$ M/ @+ E
constant dig_2 : std_logic_vector(7 downto 0) :="xxxxxxxx"; --請自己定義共陰的信號+ C% ?: n: \0 v. {; G
constant dig_3 : std_logic_vector(7 downto 0) :="xxxxxxxx"; --請自己定義共陰的信號4 G! P# k( H: u) s8 ?8 L
constant dig_4 : std_logic_vector(7 downto 0) :="xxxxxxxx"; --請自己定義共陰的信號# \/ Y9 }. h8 V& y4 [% l7 m% ]5 F9 ?
constant dig_5 : std_logic_vector(7 downto 0) :="xxxxxxxx"; --請自己定義共陰的信號
4 j } z, Z- a" O( v* _, e/ c! ~& sconstant dig_6 : std_logic_vector(7 downto 0) :="xxxxxxxx"; --請自己定義共陰的信號
+ p; h) I/ K) e7 R* h# s% g( ?- xconstant dig_7 : std_logic_vector(7 downto 0) :="xxxxxxxx"; --請自己定義共陰的信號8 v: B Q x" J* H/ ?6 i1 v
constant dig_8 : std_logic_vector(7 downto 0) :="xxxxxxxx"; --請自己定義共陰的信號) M# q8 o& C" W
constant dig_9 : std_logic_vector(7 downto 0) :="xxxxxxxx"; --請自己定義共陰的信號$ |, a. V4 ]& B! T
signal cnt : std_logic_vector(3 downto 0);
) L2 e9 d7 M* L* \) c6 xsignal sw1D, sw1Q : std_logic;$ r3 M2 j5 j0 i$ |7 i
signal sw2D, sw2Q : std_logic;7 K0 l9 H x, H1 ^
begin0 I4 ^# D. ~& a0 C0 R4 n$ D
' a7 N5 s2 ]. d: j# Q6 \4 A+ G
process(rst, clk, sw1)
( M: s3 m1 r1 B- {' g" @" I* O) \begin' H( }: r' n8 A5 D" T# _5 J
if clk'event and clk='1' then: E0 }* `/ s" v
if rst='1' then
9 a, n& p+ g" X N( x sw1D <= '0';3 i, L+ o9 u" P+ M6 F
sw1Q <= '0';' C1 a- v7 v# V6 \) Q
else
& v W1 q0 X: l% w$ c( `; s" k sw1D <= sw1;* K5 U- i3 v! m+ G2 s# m
sw1Q <= not sw1D and sw1;, T* _" P% K- ^
end if;$ P1 [' Y8 t2 {& v3 w. ^; |* D
end if;" y/ r% p6 \! p
end process;
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' V# s1 i A. c5 o" W( _process(rst, clk, sw2). U! l+ x/ |- |, a2 ?5 \1 }" H
begin$ Z8 {: N8 ]8 [" a$ k. l
if clk'event and clk='1' then: {4 ]! Z8 ]& k' j
if rst='1' then
3 \. v5 v1 g8 v% f5 `; C2 S sw2D <= '0';
$ S" r2 ~$ `& O- I2 o9 r& Q sw2Q <= '0';, i% Z, y+ V0 B: c7 X5 p
else
* s- C: p+ D' g3 j7 `9 P sw2D <= sw2;
1 C6 F- _, ?/ R/ r" Y" V/ @ sw2Q <= not sw2D and sw2;
$ w: V. E4 b* A5 G+ G+ j2 T2 X' [ end if;: B& L/ \# [$ u
end if;8 G% x y0 e7 }" l% i6 n4 ?
end process;
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% i+ t: ]* Q' c1 X* Pprocess(rst, clk, sw1Q, sw2Q)
0 t# w/ {! O% R& p1 x- Cbegin
6 R2 h3 h* E: {$ V: x2 z) k if clk'event and clk='1' then& {( O( V1 l6 l& V9 h
if rst='1' then- F1 e8 e- t1 s: S
cnt <= "1001"; --initialize to 9 when reset
- q& I" t2 ^- ~' s else' m8 k* H3 r; k5 k4 r
if sw1Q='1' then+ l2 p2 ?( z/ r- r& d: n6 U
if cnt/="0000" then cnt <= cnt - '1'; --下數時下限為0$ F/ @8 S1 u# j
elsif sw2Q='1' then9 q1 S' Q( c' W) C7 Z% D1 h
if cnt /="1001" then cnt <= cnt + '1'; --上數時上限為9
" d# s4 H6 S- h, X `. c' I. x, K- Y, _ end if;
' O0 B4 N- f' p/ e- O end if;7 s$ v y2 L3 F/ Z1 q. F% P
end if;
$ ?* e4 b# {4 ~end process;, Y5 @) |$ C! R* l5 M( s+ Q
b7 l1 Q: m1 f- T- b/ j& i7 Wled <= '1' when cnt="1001" else '0';! h h) S7 [: P Q' H
with cnt select led_dig <=
2 m9 Q) M1 P, d5 F; _; }$ ? dig_0 when "0000",
1 G1 O1 G6 g; t: K h, t2 E dig_1 when "0001",2 U+ G' v- Z K. q
dig_2 when "0010",
+ y' b' }1 I* E4 H( O dig_3 when "0011",
& X3 D% f* i2 u9 r9 L dig_4 when "0100",
, }1 j/ ]3 M( G5 e dig_5 when "0101",
& E. c& H9 J- V* d dig_6 when "0110",# z+ t: Q; Y3 L/ n* |: w
dig_7 when "0111",) m; D4 p1 C' C* Q0 m) k" b
dig_8 when "1000",# |' c9 d/ ?+ y' P! [) {$ {' n( W
dig_9 when others;; w5 A- X$ ~) w
6 b$ R; O4 r) M; _
end behavior; |
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