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发表于 2022-7-18 15:08:19
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library ieee;
: @/ E Q- |9 T5 n/ V) s$ n" huse ieee.std_logic_1164.all;
7 l& ?2 ~ v+ z& f, {% uuse ieee.std_logic_unsigned.all;
) o( l& V6 l1 T9 j* ]+ h. Q' Uentity decoder is$ Q$ w' J# y' p9 C0 F# [1 e
port(clk20mhz:in std_logic;
# M4 W* i* W0 o( D$ m money_in:in integer range 0to 8000;
6 ?4 A+ s4 F6 E6 Q! q- A- {) c" Adistance_in:in integer range 0 to 8000;
$ D/ V+ d! b* r" U' kscan:out std_logic_vector(7 downto 0);6 U$ N+ }% N, p! \
seg7:out std_logic_vector(6 downto 0);
( ~, D. G" M3 }% f% adp:out std_logic);
, ]# k$ l4 w8 V' M( Z9 cend;
$ k2 W/ }3 D3 `8 marchitecture one of decoder is
* z% k, ]9 ]$ p0 ?. _6 j6 u signal clk1khz:std_logic;3 @. u, w$ n! A5 o
signal data:std_logic_vector(3 downto 0);
! P1 ^1 U8 @! ~- Q% [. o2 ~signal m_one,m_ten,m_hun,m_tho:std_logic_vector(3 downto 0 );
: X1 [3 ?4 q6 Xsignal d_one,d_ten,d_hun,d_tho:std_logic_vector(3 downto 0);5 H# A# c2 W$ v- B" G: p
begin
; J2 v* m: N4 @9 G, rprocess(clk20mhz)
- _; @& {% R$ Z! evariable count:integer range 0 to 9999;
) q2 F9 X8 |2 a* ^+ X- ?begin' M: Q- S2 h* g& n
if clk20mhz'event and clk20mhz='1'then0 H/ B% `# f/ e. y# V
if count=9999 then clk1khz<=not clk1khz;count:=0;
+ Z4 D8 S% [- `; c3 eelse count:=count+1;
& q- P1 h1 k5 O. N6 X# Gend if;
+ R2 I1 M0 p" {% C& {end if;
+ U- n2 m7 C1 Q& D( qend process;
1 } y, J1 Z4 D/ o) `: yprocess(clk20mhz,money_in)* D8 K9 ]; z$ `: g5 d+ [
variable comb1:integer range 0 to 8000;
, }$ p( ^. E6 Y: W" S( Z& o variable comb1_a,comb1_b,comb1_c,comb1_d:std_logic_vector(3 downto 0);# ~* _( ^- v5 k) u
begin7 P7 j4 _! N p: |' X3 i
if clk20mhz'event and clk20mhz='1'then% [5 p, n& Y% r6 P
if comb1<money_in then3 g5 f; ` s* o8 I
if comb1_a=9 and comb1_b=9 and comb1_c=9 then
. a0 X' `+ P$ _ comb1_a:="0000";% F# ^3 K: G& M7 X
comb1_b:="0000";
* ]- W" A6 w' a. j* s8 ~comb1_c:="0000";+ E2 h" k) n/ f7 n A
comb1_d:=comb1_d+1;4 G1 j/ x1 V& f5 [ E; ^9 l
comb1:=comb1+1;
7 y/ W) }( T3 U7 a7 q7 R$ zelsif comb1_a=9 and comb1_b=9 then4 E. n& @3 u0 c% j3 m$ x
comb1_a:="0000";
" u' F+ ^/ ~6 m' w; @7 gcomb1_b:="0000";
, r2 y, z0 \/ _# E+ l, Ecomb1_c:=comb1_c+1;
$ X1 O% w5 ?( i# Jcomb1:=comb1+1;* b+ @+ k9 O# Z" B" Y
elsif comb1_a=9 then/ l% u+ v. f3 [: d7 k
comb1_a:="0000";$ ?8 `) p/ G$ M/ u1 J
comb1_b:=comb1_b+1;+ w" ~* ^4 H4 N1 G/ L
comb1:=comb1+1;* k2 t. r; v L% b% s
else+ T- A6 B- H: l# i; K
comb1_a:=comb1_a+1;
4 e3 s2 [' s* D7 ^comb1:=comb1+1;
* d( X8 r1 M( \ F! b4 U end if;* }4 G7 r. Q5 d3 t2 a
elsif comb1=money_in then
2 V( O8 q6 r+ F m_one<=comb1_a;
- g$ _6 @, {, k7 Om_ten<=comb1_b;) h; \' F, `* u, B/ \# D/ P- r
m_hun<=comb1_c;
- c* x4 s1 h& C2 Rm_tho<=comb1_d;
) b( h7 L g8 Z/ z3 z# aelsif comb1>money_in then, }/ D% L0 R8 Y$ ~! w9 D7 T9 s
comb1_a:="0000";
2 t7 p6 W1 {1 u/ w comb1_b:="0000";
& D7 q+ r M' e; E, _comb1_c:="0000";
: Z+ ~ M C5 H X' U comb1_d:="0000";2 C( y+ v" D( l Z- U5 y
comb1:=0;+ ~. m! r L( ]+ C% A' u. b
end if;5 n( M+ t5 q( k- l1 x
end if;0 V; c: \' O' Q# `! h+ ?
end process;
" F2 S( w5 f8 ]: B! x W. g/ Oprocess(clk20mhz,distance_in)9 k; f+ m: x+ T* m/ s
variable comb2:integer range 0 to 8000;6 _: Z0 J9 f) _ I5 A5 r
variable comb2_a,comb2_b,comb2_c,comb2_d:std_logic_vector(3 downto 0);
+ f' R$ i' T, k. {0 g# Ebegin. h* L% Q+ `: v
if clk20mhz'event and clk20mhz='1'then1 B, \7 u- o7 X# I% N/ j: v6 S) e) w
if comb2<distance_in then
9 J+ y x8 e+ p% n- i S' J if comb2_a=9 and comb2_b=9 and comb2_c=9 then
4 }! t( k1 a4 |( z0 F$ i2 X comb2_a:="0000";
3 {; t. P- U! v comb2_b:="0000";' m7 D( {6 v7 B" T
comb2_c:="0000";, s5 x# ]$ p$ q6 C q0 y* v
comb2_d:=comb2_d+1;
5 @. R- w- y1 y4 N. }& X* Z comb2:=comb2+1;. l. |& _# B3 P* I! Q' g1 }# F# N
elsif comb2_a=9 and comb2_b=9 then
t0 J c, J$ f6 w0 H comb2_a:="0000";: o8 @( W! M8 \" I
comb2_b:="0000";$ E( ?7 {# l, W# ]* T
comb2_c:=comb2_c+1;
+ Q0 r5 o X1 d+ \; }0 j comb2:=comb2+1;
0 h$ {: C6 T' B) K# h' C4 oelsif comb2_a=9 then: Y. c( c5 X6 R% g6 c. m
comb2_a:="0000";
5 F, Q# c4 J- v6 r8 M comb2_b:=comb2_b+1;
/ Q* E. ~& ?% Q6 c( R6 S comb2:=comb2+1;; i, J* x3 {& t& ?8 D( d. t) c0 |
else
( {; w' y/ y$ m5 d+ G: B8 D comb2_a:=comb2_a+1;9 O8 K5 p8 d$ s+ W
comb2:=comb2+1;) S6 ^2 _: X& h
end if;
8 U3 `. h! O( Z elsif comb2=distance_in then. b7 Z u3 s& @8 w* d
d_one<=comb2_a;
( n' P. L& @8 E# p0 [" U3 n d_ten<=comb2_b;. M) s7 v! @( H
d_hun<=comb2_c;
; ^& y$ m! ]& I' M* {; P& } d_tho<=comb2_d;
5 ]0 m! q# L! w$ a$ uelsif comb2>distance_in then; ?6 ?, J: Y& l
comb2_a:="0000";7 c, j& s2 o. e+ H" A
comb2_b:="0000";3 }' [' L4 L6 c3 }
comb2_c:="0000";$ x2 w2 |4 V% p8 X6 t. a: X
comb2_d:="0000";) H9 c* {3 A$ u0 w% ?2 a
comb2:=0;# {+ q) ^- r* H# S: O$ ?
end if;
' {: ~* T1 f; T+ C* K8 t& Dend if;
d, e) @8 E! _2 ^9 \end process;. D' T; m/ }2 p7 A
process(clk1khz,m_one,m_ten,m_hun,m_tho,d_one,d_ten,d_hun,d_tho)
9 i5 Y# {- `" _; Ovariable cnt:std_logic_vector(2downto 0);
$ n$ |, ^1 n; H, Y, Hbegin; j' U) H9 L* a$ W6 f3 Q, T
if clk1khz'event and clk1khz='1'then
. D* ~$ s# b+ K+ f. {( k cnt:=cnt+1;+ X" k$ `( [4 M C* e& ~4 u
end if;
* h! e( |% J# _4 [' q+ R Q6 Y8 zcase cnt is( B$ P3 d+ y" F5 }4 g3 g) ~
when"000"=>data<=m_one;dp<='0';scan<="00000001";* G" U4 b% V$ s$ s, N s
when"001"=>data<=m_ten;dp<='0';scan<="00000010";
& q% C% z0 D0 A3 A when"010"=>data<=m_hun;dp<='1';scan<="00000100";" k1 c; |9 \! _. O/ K. X
when"011"=>data<=m_tho;dp<='0';scan<="00001000";3 x3 q9 v8 ~+ R; ?& n
when"100"=>data<=m_one;dp<='0';scan<="00010000";
# I, U4 `# a3 [& ^8 G T3 M# h when"101"=>data<=m_ten;dp<='0';scan<="00100000";! t" g" [% N6 i
when"110"=>data<=m_hun;dp<='1';scan<="01000000";
9 N. K7 _/ [2 l1 c+ N when"111"=>data<=m_tho;dp<='0';scan<="10000000";
& x/ Q) s" {( b/ `* |end case;
6 J6 H8 N+ V3 L: Z- d8 Zend process;
5 b0 ~& m% D Y; y5 H, I* Q8 o, Eprocess(data)
) S! @. t4 Q& C* _9 ?; n5 Dbegin
4 Q" ~6 [+ r9 |+ e- ]case data is2 {& f6 V8 a1 D- F6 g5 a- Q
when"0000"=>seg7<="1111110"; X* `; J* e. m* n/ ~4 }; g
when"0001"=>seg7<="0110000";# j& a/ k3 Y. E! r
when"0010"=>seg7<="1101101";% f$ p% Z2 [+ f
when"0011"=>seg7<="1111001";9 t( W4 Z1 M. t6 t2 w* E
when"0100"=>seg7<="0110011";7 T/ I0 W# ]: d
when"0101"=>seg7<="1011011";4 {/ T& h# }2 {" v
when"0110"=>seg7<="1011111";; g9 ^5 |" m! E4 X# E
when"0111"=>seg7<="1110000";
8 _% o ]: V* V when"1000"=>seg7<="1111111";9 p I) ]/ y% g2 b6 B
when"1001"=>seg7<="1111011";& C9 g, J9 e3 c8 f- }: \, c
when others=>seg7<="0000000";5 m& x U- X( ?. J: ]7 q y
end case;! A1 x' i H5 r& }( x
end process;
$ G! g* r' h- X5 |& l8 zend;
! ~1 o; }6 H4 T& m8 d' _3 c! U2 T# Z) X s; w
: F1 x7 L5 s* E8 }# w5 q+ E- b( b
' _8 v2 n$ r- H第二个程序是这样的 |
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