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module _7segscan(clk,dataA,dataB,dataC,dataD,segd,sel);
3 ]. U5 ^: f; l9 qinput [7:0]dataA;3 I, l/ a# ]/ j. e
input [7:0]dataB;
% D# D r' `) u# o7 F$ D+ c9 }input [7:0]dataC;5 y! N5 `+ i9 K( ^! }8 u' o8 J0 {9 x
input [7:0]dataD;
% L9 q: z0 g( }" E( yinput clk;
2 |8 s" o" y: x' u+ a# M' Y! j! L, }output [7:0]segd;
$ V# [5 E, B" ?! Q) m4 f+ A3 Woutput [3:0]sel;' v- z* S5 D5 N1 V
reg [7:0]segd;
; W3 i) o" S; b4 n! qreg [3:0]sel;/ b+ t+ Q6 I1 z) d7 c j" X; Q* ?
reg [1:0]i;
/ N& ~( ~. q( @" {- F[email=always@(posedge]always@(posedge[/email] clk)7 _# ^) L$ _( p& H; J8 X1 L
begin
4 v2 w0 O. L, u6 ?. `i<=i+1;
; `, F" ^! c' m6 p; o& ] ~& @( ycase(i)& x; y7 d, v3 Z2 b& X- E
0:begin segd=dataA;sel=8;end
* ~+ w/ n ~& F6 T* S; A 1:begin segd=dataB;sel=4;end: \( P1 W. g! o' u
2:begin segd=dataC;sel=2;end
$ H; h1 J$ {) q9 ~7 n3 w4 H 3:begin segd=dataD;sel=1;end- a: y o) c5 @, @& j
default:begin segd=8'bx;sel=0;end
! k" E$ y4 a* L& f# V' ~0 d, Pendcase) F9 y5 ?8 A$ O# n
end- G' c: i! \/ u
endmodule
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这个是Verilog 的,VHDL的没有;;;8 O( S9 j/ }# h- x' J
刚学VHDL,很多概念;分析方法多不知道;* } C! v: v7 b( i0 J
有时候把问题想的很复杂,让自己陷入困境;更难写了: q1 j3 s& x( _ g# w6 l
VHDL的8位数码管扫描显示电路 有头绪了,但还是写不出来;没有输入端口直接显示会了;
# V+ Y4 a& k7 e f2 E但是有输入。老是把它想成锁存,每位多要带锁存器硬件电路; / O$ f2 p V4 I. |8 m4 K% b ]
写软件的时候老是想着硬件电路,怎么样也想不出办法) M+ {) n9 V1 h) N( t. E2 o
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今天早上在写。。。7 ?( y n% I3 \' p& l
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! T r7 m+ s- R/ H' Mzyunfei 威望 +10 谢谢版主 ,不过上面的不是原创内容;今天下午用VHDL写了个8位数码管扫描电路;编译通过了。不过有不少waring;1 t& Y- ]0 O }# V" d
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一个人孤军作战一个字 累!!!更更何况我是新手;新手也寂寞啊 i. S9 c5 T4 G ?, k. {- D
Warning: Timing Analysis does not support the analysis of latches as synchronous elements for the currently selected device family+ p, \& i+ q! M: b5 v# E* G
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Warning: Found pins functioning as undefined clocks and/or memory enables Info: Assuming node "CLK" is an undefined clock
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不去掉仿真设置下的的CHECK OUTPUTS仿真的时候会出现如下错误:请高手指点一二:
& z* c" H- C7 y. a9 DError: Simulation results from F:/VHDL/LED_SCAN/db/LED_SCAN.sim.cvwf (0 ps to 1.0 us) do not match expected results from vector source file F:/VHDL/LED_SCAN/LED_SCAN.vwf
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由于不会做仿真最后没有仿真,序列信号多不会赋值,晕死了; 大家会就教教我把!!!0 P; B3 Z- F, Y, W4 l0 U
1 [7 n, |2 w8 q0 I3 Y4 g$ c* S数码管是共阴的,位码大家自己看下是不是对应起来了!!
, u, }7 Z& b: A+ b此程序不带译码功能,直通输出;
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! i+ I! h2 B/ X8 e. `如果你使用的是7064(64个宏),那 Error: Can't fit 67 registers in device ;哈哈,资源不够/ u/ q* W; Z! I# |; k6 b4 |, h
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下面是完全自己写的源码,没有在目标板上试验过。 复制代码的朋友要注意了!!!
p7 I+ q+ K: e8 K4 D z9 c7 T: f, Z" \
LIBRARY IEEE;
Y$ j( j( X& \USE IEEE.STD_LOGIC_1164.ALL;
5 Z3 i# K/ M# x+ V0 l- I S4 eUSE IEEE.STD_LOGIC_UNSIGNED.ALL;
# j: {# i5 z( P$ qUSE IEEE.STD_LOGIC_ARITH.ALL;' S# N; X7 i4 i$ ?) j( C
- O! T3 q/ w6 d% P" ~* @/ M! S6 b
ENTITY LED_SCAN IS; R3 c7 I Q; v' L7 |" z
PORT(
, B+ r \# T0 J' @ SEG7IN:IN STD_LOGIC_VECTOR(7 DOWNTO 0); ) R7 L8 K j5 x3 M* j( N
SEL:IN STD_LOGIC_VECTOR(2 DOWNTO 0);, N& l" B2 J+ q
CLK:IN STD_LOGIC;
$ B0 b4 x+ L& F0 k8 G1 A. K! G SEG7OUT:OUT STD_LOGIC_VECTOR(7 DOWNTO 0);3 @1 _, z" x" e7 w4 d* ]& _
SCAN:OUT STD_LOGIC_VECTOR(7 DOWNTO 0)
7 V: L, W( w1 c" K4 s7 R );
7 p( @8 A! F0 q" e( d" L! NEND LED_SCAN;% F* h8 m1 |# F" m) \0 c
ARCHITECTURE BEHAV OF LED_SCAN IS4 r" U% O: o+ c) w! h
SIGNAL cnt8:INTEGER RANGE 0 TO 7;
/ m& A7 j8 s8 v9 lSIGNAL TEMP0,TEMP1,TEMP2,TEMP3,TEMP4,TEMP5,TEMP6,TEMP7:STD_LOGIC_VECTOR(7 DOWNTO 0):="00000000";# G* o. O3 u, }
BEGIN
, Z! V: p/ v" lPROCESS(CLK)
& p) p2 u2 Z5 F; X6 C+ N3 KBEGIN
3 H4 \, V& t: @9 eIF (CLK'EVENT AND CLK='1') THEN
, T( A, \/ }$ B, T7 ]2 t% y cnt8<=cnt8+1;
6 o( p" l& C" h* w) R% ^% DEND IF;1 b+ n& M, V8 Z) R c
END PROCESS;
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6 Y: ~; U- N( v# e0 l% i- a1 GPROCESS(CLK)
, N# g0 d* U% WBEGIN
, _1 Q# |- K* x' J" b6 dIF (CLK'EVENT AND CLK='1') THEN( a2 `# U+ C, ?1 j: H# Z( c
CASE SEL IS
- x: h& P# C, G" zWHEN "000"=>TEMP0<=SEG7IN;
3 w4 C0 \0 ?* A0 Y) JWHEN "001"=>TEMP1<=SEG7IN;7 }( f7 t& y7 k- I1 @6 k2 o/ S/ ^
WHEN "010"=>TEMP2<=SEG7IN;
9 R6 {0 n/ _+ p3 N2 S) DWHEN "011"=>TEMP3<=SEG7IN;
* v+ g( q/ \7 M! D# g R+ I7 AWHEN "100"=>TEMP4<=SEG7IN;
0 c, R8 k7 P) _" l1 W) P* x s2 D7 UWHEN "101"=>TEMP5<=SEG7IN;: u, ^$ s/ ^+ E9 L
WHEN "110"=>TEMP6<=SEG7IN;
8 O# b/ d0 ~1 Z0 y- v0 OWHEN "111"=>TEMP7<=SEG7IN;
% d7 b# M# C7 x& TWHEN OTHERS=>NULL;8 G2 i+ `9 U# F3 |$ V! C; ]2 }
END CASE;
$ o4 S+ A' g# v) O1 R/ \/ EEND IF;
- y$ n" G* d1 D g% I# U, { |END PROCESS;4 F7 h4 @+ ~: _. Z
process(cnt8,TEMP0,TEMP1,TEMP2,TEMP3,TEMP4,TEMP5,TEMP6,TEMP7)
5 u$ I3 y7 A) F7 ^BEGIN
, i* D# |# Y) A1 [ CASE cnt8 IS
$ p0 z" A3 O- D7 f9 i( k# }) [ WHEN 0=>SCAN<="01111111";SEG7OUT<=TEMP0;
6 Q& ^6 {. i% @; G q WHEN 1=>SCAN<="10111111";SEG7OUT<=TEMP1;
* M% D! g3 g0 G5 g+ N. F WHEN 2=>SCAN<="11011111";SEG7OUT<=TEMP2;8 {+ l3 H7 ~9 O0 x- Y
WHEN 3=>SCAN<="11101111";SEG7OUT<=TEMP3;
5 \8 g5 B- z# b9 d" p: \: S$ V" U WHEN 4=>SCAN<="11110111";SEG7OUT<=TEMP4;5 M" e3 M3 J& G. z8 B
WHEN 5=>SCAN<="11111011";SEG7OUT<=TEMP5;
$ f5 E9 H- F, }$ \8 w WHEN 6=>SCAN<="11111101";SEG7OUT<=TEMP6;0 O# b& ~* Y! q0 J! y6 R. B% T
WHEN 7=>SCAN<="11111110";SEG7OUT<=TEMP7;) c# T$ m& N" | m
WHEN OTHERS=>NULL;
Z+ h( x' A7 h! jEND CASE;
, w2 {# g* D/ R P" M0 dend process;& u( P/ [- b3 o5 v; H7 z
END;
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* x: {$ D; o# ^7 K6 K U现在又发现没有带一个写入使能;所以就加WR信号,当WR为1的时候允许写入,当7位写完后置0,此后不管 SEG7IN ,SEL 为什么多不会进行写入;
$ ?5 x, _$ k& c8 t5 z这个东西断断续续 搞了我一下午, 哎,,很久没有这么投入了的做一件事情了!!!! C- P& {+ U$ Z) p+ b
现附上源代码:
3 d' Y M* O8 J- z% S3 |LIBRARY IEEE;
1 K0 m2 D4 k1 I" ?6 r L4 d; rUSE IEEE.STD_LOGIC_1164.ALL;
; v0 w; n% S: t! Q+ [, W. M, HUSE IEEE.STD_LOGIC_UNSIGNED.ALL; b j* R: T' } ^3 q5 j1 d' u5 H
USE IEEE.STD_LOGIC_ARITH.ALL;. E# o7 w6 }, U5 b* O6 U
8 I0 J6 [/ v, r' i% ?& M1 _
ENTITY LED_SCAN IS1 ~6 }4 i0 O) y3 D" a/ F; R
PORT( - b. Z5 T, C' E7 I' k* F s
SEG7IN:IN STD_LOGIC_VECTOR(7 DOWNTO 0); ; H; a4 m0 x' G2 C
SEL:IN STD_LOGIC_VECTOR(2 DOWNTO 0);
3 L( v+ \# p4 w! v1 P6 P/ k CLK,WR:IN STD_LOGIC;
& q5 A) M% x7 d+ V5 G SEG7OUT:OUT STD_LOGIC_VECTOR(7 DOWNTO 0);4 _ I, S8 ?! X# X: N& a2 a
SCAN:OUT STD_LOGIC_VECTOR(7 DOWNTO 0)
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END LED_SCAN;
) F7 b3 t" {) Q( i; j' @ARCHITECTURE BEHAV OF LED_SCAN IS4 D( v$ V. x5 w9 E+ y. @) s0 K
SIGNAL cnt8:INTEGER RANGE 0 TO 7:=0;
: K% d; i# |8 N e1 e3 k, h" `# DSIGNAL TEMP0,TEMP1,TEMP2,TEMP3,TEMP4,TEMP5,TEMP6,TEMP7:STD_LOGIC_VECTOR(7 DOWNTO 0);7 [+ Z- e4 c, Z
BEGIN
; @7 b. f% M0 s# nPROCESS(CLK)
+ ]( L5 U+ B. I7 h$ H3 [: _. i# WBEGIN C* ?& x# {2 u, ^' Y0 `4 Q' q$ ~
IF (CLK'EVENT AND CLK='1') THEN
/ J3 \, H2 d" Z0 r/ {7 \IF WR='1' THEN
" I7 X# z% k/ QCASE SEL IS
: W: |9 \) P( ~- B5 M9 G KWHEN "000"=>TEMP0<=SEG7IN;0 Y6 a% h& A' G# }
WHEN "001"=>TEMP1<=SEG7IN;" r9 ~ U6 G+ D5 Z* Z2 n* L# l
WHEN "010"=>TEMP2<=SEG7IN;
8 g5 h; w9 w+ z9 i1 _+ TWHEN "011"=>TEMP3<=SEG7IN;) `5 b2 f$ S" f/ m# m
WHEN "100"=>TEMP4<=SEG7IN;
$ b5 @1 J. N0 k" cWHEN "101"=>TEMP5<=SEG7IN;4 z5 ~5 l3 c# x+ o
WHEN "110"=>TEMP6<=SEG7IN;
1 p! u, r7 T$ x6 R; j N1 cWHEN "111"=>TEMP7<=SEG7IN;, z! w3 L- O+ x& l5 @
WHEN OTHERS=>NULL;
# o/ b+ d$ k2 B JEND CASE;7 W( V% ^- o; X' O% u/ l1 U
END IF;
0 D; `+ W/ J7 }4 ~) M0 y( A4 i9 |END IF;
! x# y- m0 E) |3 I+ E; R5 kEND PROCESS;
9 F" G+ e: W, g$ e( EPROCESS(CLK)
- x5 [2 ~/ y5 v" K5 L. j1 g% WBEGIN
4 l+ @5 ^7 m" D/ X& CIF (CLK'EVENT AND CLK='1') THEN
. r' b( ]6 T2 _0 U: G cnt8<=cnt8+1;* M/ o5 N4 p$ J9 k2 j
END IF;: g: `- n' i- ]2 b7 d1 M$ }3 R
END PROCESS;
8 M8 m" K. r& G7 S Xprocess(cnt8)
7 R* w+ W0 K7 ], |9 }BEGIN0 M- \7 ~2 e. @; Q# Q7 c( @
CASE cnt8 IS( F, }. b7 y0 a1 J
WHEN 0=>SCAN<="01111111";SEG7OUT<=TEMP0;# g2 }! `# g. U
WHEN 1=>SCAN<="10111111";SEG7OUT<=TEMP1;3 s$ f$ J$ z$ P
WHEN 2=>SCAN<="11011111";SEG7OUT<=TEMP2;6 @8 z1 V; u) f. N0 h
WHEN 3=>SCAN<="11101111";SEG7OUT<=TEMP3;
! k1 {. @% h/ e( `" x4 x; D# x7 [" Y WHEN 4=>SCAN<="11110111";SEG7OUT<=TEMP4;
* B, N' M: j& B$ \5 Y* O' I3 E! B WHEN 5=>SCAN<="11111011";SEG7OUT<=TEMP5;
- H& V8 M( b/ ~* L; \0 o c | WHEN 6=>SCAN<="11111101";SEG7OUT<=TEMP6;9 ]) D c$ b" ~1 J6 K5 N- R4 C
WHEN 7=>SCAN<="11111110";SEG7OUT<=TEMP7;
/ x/ E! y8 c% q, R6 W5 w WHEN OTHERS=>NULL;: W' z3 v( Y/ A8 B. y0 P
END CASE;
1 a& t5 [( E6 `* U, m1 P; |3 f+ Xend process;$ u- i S, m5 H
END;
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下面有仿真图7 H9 E7 ~6 E5 _0 C: t. g2 d
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& q6 Z4 K5 }4 F( L* w- d附上一张RTL ! }$ D4 `. N" O# ?- p' d' b
8 X8 D _- g8 t( |[ 本帖最后由 zgq800712 于 2008-12-3 20:23 编辑 ] |
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