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这些都是小错误,希望细心一点7 f# E3 ]# \ s, p: |$ R* w
library ieee;
* [! Z% [$ v( b+ A: v& ? P8 wuse ieee.std_logic_1164.all;. a& w% {8 u" f2 @' F
use ieee.std_logic_arith.all;/ S0 G! x' ]8 e
use ieee.std_logic_unsigned.all;% } l( I& o- F, P
entity mycounter_60 is
% {: m. a+ t6 ~! s% fport( clk,clr,en,bcd1wr,bcd10wr :in std_logic;
9 h6 h& U$ l! `9 `6 d, q5 `: ] din:in std_logic_vector(3 downto 0);( N* m- p# }" @6 z# ]: y
co ut std_logic;& f5 |+ n' }, P3 U! m; Y
bcd1 ut std_logic_vector(3 downto 0);" L" r6 M3 r3 _; M( u2 m" d& k3 Q
bcd10 ut std_logic_vector(2 downto 0)
' ? h; ]6 z1 u+ V. \- E% B" b- ? );
' b i3 G* B5 n7 U3 T+ Cend;& y9 F. m4 n( o7 \2 t, V; l+ x
architecture behav of mycounter_60 is3 [: Z, p: x/ _3 L2 M$ g
signal bcd1n:std_logic_vector(3 downto 0);
" a) W3 [6 |# A/ J& wsignal bcd10n:std_logic_vector(2 downto 0);
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& c; i, }* G1 m5 {4 w( Hbegin
: L2 d9 A# k g; G8 [ process(bcd1wr,clr,en,clk)
9 ?7 s! m3 f" G" {+ ^% j- r begin
1 B' I- l; F, U0 wif(clr='0')then' J. |4 K/ E' A- g, P5 t
bcd1n<=(others=>'0');
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elsif(clk'event and clk='1')then
7 c% p# Z e7 o$ `6 s8 cif (bcd1wr='1' and en='1')then* w' \. |3 k: T% E* c. o
bcd1n<=din;7 i: V5 p9 V0 x2 u; A
elsif (en='1')then4 ^" M. g7 ~* u
bcd1n<=bcd1n+1;
7 r q, b5 D$ y. }5 gif (bcd1n>=9)then
6 W& h/ }# }; r+ k a& Y% lbcd1n<="0000";: c$ p2 {0 ^& g; v: D
% ~' f; i6 p5 Kend if;
3 J7 _( F; o1 Nend if;+ ^' H2 P. L, q! h8 N6 w
end if;
) C2 j3 ?& U8 v3 \% {7 wend process;
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process(bcd10wr,en)
/ K7 h$ x" o- p' l' ]begin
2 @: ]+ l5 R* \/ v( Iif(clr='0')then7 W+ J6 g; v' D, G, M
bcd10n<=(others=>'0');
, a6 w3 x+ f5 jif(bcd10wr='1' and en='1')then
4 B7 a5 P) q M0 I% `7 vbcd10n<=din(2 downto 0);
G/ z. _2 s$ d6 A, b! Q, Oelsif(bcd1n=9 and en='1') then+ J Z, z* o& P8 R6 }" g1 s% Q, h" c
bcd10n<=bcd10n+1;
% A/ q) G6 d2 Z2 q; lif(bcd10n=5) then
' c% ~5 M$ @1 X6 Wbcd10n<="000";
, k) ^/ O1 f) Pco<='1';
$ s6 z0 ]3 R- F/ b l% v4 ~else
; J, j2 w; }1 k, L7 t6 |co<='0';
) I- w* r4 x2 b. W* bend if;
2 E' k. d4 |/ L5 a Kend if;9 J* o6 E6 X n9 b$ O5 t
end if;
, G( f8 W& K' U6 x( h w, tend process;
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- ^6 d2 _# L& I- O T5 Pbcd1<=bcd1n;
/ L$ x9 `7 x, `- Rbcd10<=bcd10n;. D& L8 o3 J- a, |4 P$ N/ f
end behav;
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