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这些都是小错误,希望细心一点$ N$ Y* V) ]) d3 {" l$ Z
library ieee;
0 ^0 l7 u8 ?* `7 guse ieee.std_logic_1164.all;6 I- a$ R2 b; C; o
use ieee.std_logic_arith.all;
j: T2 g8 l0 ~) E- C6 G. n6 |use ieee.std_logic_unsigned.all;+ Q' p! Z2 m1 D; D! L3 p" w
entity mycounter_60 is: f/ t+ E5 ?, ?% L& @: o; E% K8 P" Y4 h
port( clk,clr,en,bcd1wr,bcd10wr :in std_logic;
. Q, S2 v" Q3 y$ y: l: J6 k din:in std_logic_vector(3 downto 0);
4 v! b5 Z/ o( f3 m) y. O- U6 i0 l co ut std_logic;% S9 R; u/ f+ Y. e
bcd1 ut std_logic_vector(3 downto 0);
1 D! K; r; I+ d& J bcd10 ut std_logic_vector(2 downto 0)
" W$ X4 O& l7 p* W" x );
+ `( O1 i5 l$ L9 T# a3 Mend;- g9 L; T, n% R5 Y. D
architecture behav of mycounter_60 is
0 }- E+ P4 T$ [% {% \4 u- _/ `signal bcd1n:std_logic_vector(3 downto 0);/ g; s# U q0 n1 M7 F2 ~8 ]
signal bcd10n:std_logic_vector(2 downto 0);) K- B6 a7 b8 F; v& J( ^6 F, {
; z" `- l" @& X
begin
D, R; E. c8 K process(bcd1wr,clr,en,clk)2 M9 R$ C g2 n0 x8 R/ H1 L) U( ^
begin . L7 F' X d6 F) N" I7 g3 H& h- v
if(clr='0')then+ q8 Q6 D, _$ {+ ]+ T# k
bcd1n<=(others=>'0');2 O( ~4 Z1 R, H4 x" V) ^
7 \, n$ }: T$ ^+ |8 M
elsif(clk'event and clk='1')then! F; G, w! A1 `( C5 T* ]
if (bcd1wr='1' and en='1')then
' M/ Z) X. C0 j" nbcd1n<=din;
c) F4 x+ g4 x; C D# Aelsif (en='1')then" P; j6 B7 {3 G3 b& t1 n
bcd1n<=bcd1n+1;& U4 O: Z/ o" M, `4 R+ c$ V: A
if (bcd1n>=9)then) I0 T/ ?* d2 |9 `; p
bcd1n<="0000";
. W3 v4 T5 L: I6 e* Z: e. L
) q7 e7 w: p; P! W' `) uend if;
' ]# P% E7 c- [* ]+ y2 ~8 kend if;
9 z' u W$ g! k! _end if;
3 G9 p$ ]$ B5 L0 w$ M, uend process;/ C8 L0 x% v+ N4 A& ~* W2 c: |" K4 `
4 o7 p: B% Y7 J! q" H1 n( {- O m" j7 w
) u/ _ n, ` Y" ]process(bcd10wr,en)
/ q8 b1 E5 h8 B% O/ J/ Hbegin6 D6 n ?) d* B" z
if(clr='0')then
2 b. V# u" ]1 B9 M3 mbcd10n<=(others=>'0');4 z* d) {2 u, I) o( v
if(bcd10wr='1' and en='1')then1 r4 A& r" C/ ^& I! B
bcd10n<=din(2 downto 0);
+ K, T6 {3 c9 ^. N. P0 ielsif(bcd1n=9 and en='1') then
8 |7 G9 ]! H4 j/ Jbcd10n<=bcd10n+1;" b6 G# ^ t* @7 E
if(bcd10n=5) then7 g* {# ^2 h8 {. J o* y0 R, S
bcd10n<="000";$ n( i& ~8 I7 ^3 Z8 ^/ L- r
co<='1';6 V) t% ~1 K1 q* W
else, k- S7 z% S) [0 O" `
co<='0';9 X& y9 B; e. y9 x) ]& U; G+ N
end if;
4 M4 l3 W) i: a. o: yend if;
( p) N* a* \$ h. u; K7 c) aend if;4 P6 |9 D b7 X2 c+ O- c
end process;
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bcd1<=bcd1n;
- r. I" X% P/ Z0 @/ obcd10<=bcd10n;
. T7 p9 Z& h+ ?5 }. Q4 F+ vend behav;
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