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本帖最后由 Annhu 于 2009-10-26 16:08 编辑 ) _! Q. p* W- k+ W9 N' R/ Y r5 N
9 [& e+ R$ y0 {2 v" ^! \5 g
:) 下面的程序是一款CCD的驱动程序,clk1=2MHZ,enable主要是控制sh的周期是10us还是10ms icg的周期不变始终为10ms,delay用于控制sh、icg的延时0.5us。编译错误见最下方,小弟把clk和enable的位置换了一下即先判断clk1上升沿然后在判断enable问题就解决了,麻烦高手帮忙看一下这到底是什么原因呢?还有j就是程序的代码有没有可以优化的地方呢,谢谢大家!# j' c1 ~2 o5 X8 c! q
--CCDshixu
! N; A2 k6 x8 ILIBRARY IEEE;4 v: A& A R* ^- D5 q
USE IEEE.STD_LOGIC_1164.ALL;
1 D ?+ Q: t! s0 jUSE IEEE.STD_LOGIC_UNSIGNED.ALL;! \( q4 \3 j; c3 E" n: B/ q% L6 [
entity divclk is
. j4 e% O) v* n port(clk: in std_logic;0 r# e. d2 E( o) F- i
start:in std_logic;# ]$ ^- n9 ?8 ]0 g- ?
enable:in std_logic_vector(1 downto 0);
( l @) h+ \, U4 M7 s$ z' }& M o_m_clk out std_logic;
+ G/ h/ i# A4 i& D6 r o_sh,o_icg out std_logic; : ~/ h* z% ^% X @9 Q
stop out std_logic);
& y Q6 `" y! R. u' C% U L' T6 r, Aend divclk;
! U M0 Y& U4 J* h( m* rarchitecture behave1 of divclk is* _9 @! f; A e
constant halftime :std_logic_vector(3 downto 0):="0101";
( {) r$ I# n+ T5 f3 m) b$ [' Wsignal divcounter: std_logic_vector(3 downto 0);--shizhong fenpinjishu
H. {! i8 J9 t+ M' C Gsignal shcounter : std_logic_vector(13 downto 0);--tiaozheng sh zhouqi he zhan kong bi
: k2 m5 K& n( o0 z* A- osignal icgcounter :std_logic_vector (14 downto 0);--tiao zheng icg zhouqi he zhan kong bi
/ P/ A+ z. P6 J+ A' J4 nsignal delay :std_logic_vector(1 downto 0);--shixian ICG/SH de mai chong jian ge
/ V4 E3 q @: Osignal clk1: std_logic;; q* ~) h( n) A; p9 d; [2 M
begin
: V5 {& n' J5 y: A3 K5 y7 |P1:process(clk,start)--24MHZ,12fenpin
! e5 C8 f5 W5 Q2 G. K5 t begin
8 u! X. g t: }" O& ` if start='1' then
: p6 s" v, D' P' ^) s q clk1<='0';: u6 m Z, Q w4 q' I. j' S
divcounter<="0000"; 7 G6 n0 n6 p' ]* v5 Q: @! Q* f
elsif clk'event and clk='1' then
! `# x+ c4 N" r) C# e* Z: s$ p1 Q4 S, o if divcounter = halftime then+ h7 y8 J1 ]! L+ V2 U
clk1 <= not clk1;
5 L9 n3 x! ^- I: ]6 i E: e3 Q# Z divcounter <= "0000";( Z2 y& h# `6 M
else
( R% ?# e1 a2 b divcounter <= divcounter + 1;
6 M1 j e2 R& ~4 d6 t" c end if;
- ~- c# [3 R0 Z0 X6 r3 N: h end if;" Y* ]" v: j# J4 n
o_m_clk <= clk1;# {( K- @/ q& P0 U* s& g+ |+ w+ G D
end process P1;5 q: ]* D( z/ K: h" S
P2:process(clk1,start,enable)
. X" J- S9 _6 ^. abegin# f" q1 ^$ ^7 q! q$ v4 h$ `
if start = '1' then
& x m- P9 Q4 v! s$ j A5 h delay <="00";, t! z. r/ ^; ~' D0 B. A$ O9 k
shcounter <= "00000000000000";/ T% q" D- n6 j( Z# Y
icgcounter <= "000000000000000";
& Z7 Y) U4 O# t8 G# u F7 N o_sh <= '0';& m; n5 w7 E i2 N4 G9 P5 Z3 ~
o_icg <='1';( D' j5 D9 H1 n4 u
stop <= '0';( _: w4 L& p" I, k/ m- D
elsif enable = "01" then0 F) K+ v& w1 h" }4 N8 L7 L) b
if clk1'event and clk1='1' then1 U9 s- f/ c3 z
if icgcounter <"100111000100000" then -- 20000分频产生10ms的周期! i+ @; @/ G, Z k# ` b
icgcounter <= icgcounter +1;
# J, Y; @ _% y/ y+ W; I% v5 c) A3 f& | if icgcounter <"000000000010100" then * ^, `( {! e, _' z) W
o_icg <= '0'; 6 q% ~4 T( t0 f! S
else
: B) N2 Z. D6 h3 A% v, t o_icg <= '1'; $ k4 O, D5 U& q* {" {6 U
end if;
- L9 b3 L2 L/ i K- E1 y else
& f7 H. j/ X' d icgcounter <= "000000000000000"; " C0 U6 @: L# k
stop<='1';# a4 J& `3 z( L4 j& y* j7 R" y/ S
end if;
# H; W ^ N, R0 |, g7 X. T if delay = "01" then
( I! y1 k6 f+ o1 g' d delay <= "00";7 @+ q& s/ D& a/ b: q
if shcounter < "00000000001001" then -- delay用于产生ICG、SH的脉冲间隔0.5us,10us SH" Q+ q E) e0 ~* \! n* f: A
shcounter <= shcounter +1;3 Z1 I. E' o$ \% X
if shcounter <"00000000000101" then o_sh <= '1';
t* O0 ?) U! M6 V0 b0 x" t* l# w else o_sh <= '0';
( m% t+ P+ t( r1 y2 k end if; 8 h: E& l6 z1 `# z7 p% u1 k
else; O7 f& d8 Y6 Z0 N& I( P
shcounter<= "00000000000000";/ |6 |8 p1 |# p& u/ P
end if;* N" V6 I- V `$ j0 O
else
# I9 J% I% J, f% p9 H8 B- {; O delay <= delay +1;: Y3 p# Y* F: L1 B7 I
end if;1 P; g# S( \8 Q- T
end if;2 H! w' E' m3 h5 T8 n6 s
6 u7 z a7 _$ t4 i! F elsif enable = "10" then
& x- V3 k9 s* D" O4 ^/ H, e if clk1'event and clk1='1' then6 K$ z/ T: a# o& u9 m; r
if icgcounter <"100111000100000" then -- 10ms ICG& {3 }6 @& |0 @
icgcounter <= icgcounter +1; i: w. A% E( y' H0 n$ D5 k
if icgcounter <"000000000010100" then
5 R H P. ]: l( X, S0 P o_icg <= '0';
O. z2 o) `. w8 \. q1 }6 v/ t9 I else9 l) Q4 a" `5 ~. G! v
o_icg <= '1';
9 E; @8 V- c. F. S7 }6 `, d end if;+ g X/ O0 b3 H8 P1 m
else 7 V1 N1 I5 n" e0 Z
icgcounter <= "000000000000000";
* d$ K+ \6 Y0 h" U stop<='1';
$ v8 T6 _1 q# y, ^& I+ i end if;
7 o0 e6 {3 N- Q; ? if delay = "01" then" k9 M' c# J1 O4 b$ u9 c
delay <= "00";1 B' a5 J `0 O0 u" c' n* ?/ Y
if shcounter < "10011100010000" then -- 2次10000分频delay用于产生ICG、SH的脉冲间隔0.5us,10ms SH
G" V' `6 z. F* f: {, `# [ shcounter <= shcounter +1;
}& R& }- Y: Q, r# Z if shcounter <"00000000000101" then
- L; O. v W8 ^( n1 Q7 `% {% ^ o_sh <= '1';
2 T3 C( `, T* T; m# W4 G- k else* D* r2 o J# h1 N3 _6 _! D8 A6 g
o_sh <= '0';
( n, ^" L* p. V& t- T* Y end if; 6 j; N7 f5 w; v n$ i
else! A1 u' N" S) K. h9 B d
shcounter<= "00000000000000";
5 K s! L, F4 k, E- u+ X) A) I( X% u4 d end if;
2 ~% {- T* C! E# M else9 q y$ [8 G% ^, |
delay <= delay +1;
3 o( ?! ]/ M, F0 f+ I0 h5 j end if;
5 p0 e' w7 g9 x6 R/ M7 H8 K end if;
$ @( z) q# `( a$ K. t" l v end if; 2 V1 G( b4 ]& d; v3 ]. R& ]
end process P2;
/ R& G& P+ u" w& ]0 X' A( h' @: Wend behave1;7 g9 V0 D8 _) G9 y5 s
Error (10821): HDL error at divclk.vhd(42): can't infer register for "stop" because its behavior does not match any supported register model& P3 c. ?: G' S( S c
Error (10821): HDL error at divclk.vhd(42): can't infer register for "o_icg" because its behavior does not match any supported register model2 h" }5 L+ B: [% Z; `1 ^- W1 ?
Error (10821): HDL error at divclk.vhd(42): can't infer register for "o_sh" because its behavior does not match any supported register model
+ O5 l5 U' z& C% v. O J- |: z7 ]Error (10821): HDL error at divclk.vhd(42): can't infer register for "icgcounter[0]" because its behavior does not match any supported register ' O$ ]4 H: y' D# e
model! O- @# @( e: B& n- y$ ^
Error (10821): HDL error at divclk.vhd(42): can't infer register for "icgcounter[1]" because its behavior does not match any supported register
" T$ ]) `( L, f2 l. b* |model
- r7 q9 E& n/ {; @. o, [" K# |* rError (10821): HDL error at divclk.vhd(42): can't infer register for "icgcounter[2]" because its behavior does not match any supported register
9 G* D' r8 S$ s- Z! Z G5 \model
! n( q4 I% L2 `2 c/ ]% W5 _Error (10821): HDL error at divclk.vhd(42): can't infer register for "icgcounter[3]" because its behavior does not match any supported register 5 f# W& y, ^+ F Y
model
# c; I) \: H: ~3 W8 S# IError (10821): HDL error at divclk.vhd(42): can't infer register for "icgcounter[4]" because its behavior does not match any supported register
/ z ~# Q1 l7 _# e$ O. zmodel
9 O7 ^# c% i( z; A$ Z# CError (10821): HDL error at divclk.vhd(42): can't infer register for "icgcounter[5]" because its behavior does not match any supported register
1 `5 g- h: p' f4 rmodel
( n$ b2 I9 w L6 ZError (10821): HDL error at divclk.vhd(42): can't infer register for "icgcounter[6]" because its behavior does not match any supported register
$ C X f r' ~( Zmodel
- g( s# L% m( XError (10821): HDL error at divclk.vhd(42): can't infer register for "icgcounter[7]" because its behavior does not match any supported register
g' s; W4 K. d0 a, T. k* ^4 cmodel& l8 L3 H, i$ H: E2 w5 d
Error (10821): HDL error at divclk.vhd(42): can't infer register for "icgcounter[8]" because its behavior does not match any supported register
' I0 S: M- g2 J" { O2 b! ymodel8 H( ^& q9 m; L4 A& j# \
Error (10821): HDL error at divclk.vhd(42): can't infer register for "icgcounter[9]" because its behavior does not match any supported register 0 _( Z3 U7 {; T& B) V5 Q& a
model) K4 A* j$ S; T) t8 u
Error (10821): HDL error at divclk.vhd(42): can't infer register for "icgcounter[10]" because its behavior does not match any supported register 4 L. V5 U) x8 x! q
model: s/ H9 z$ A' o3 Q9 m* x
Error (10821): HDL error at divclk.vhd(42): can't infer register for "icgcounter[11]" because its behavior does not match any supported register 7 D" |9 J1 U, G# P" O+ ?& r8 Q
model
& z" Y: a) f( }% |: xError (10821): HDL error at divclk.vhd(42): can't infer register for "icgcounter[12]" because its behavior does not match any supported register
# T D% v0 Q" e, Omodel9 o' p8 G$ `( D. W
Error (10821): HDL error at divclk.vhd(42): can't infer register for "icgcounter[13]" because its behavior does not match any supported register - C7 { z3 X7 e5 p
model/ Y2 U1 B$ K% }) V4 |
Error (10821): HDL error at divclk.vhd(42): can't infer register for "icgcounter[14]" because its behavior does not match any supported register
- d& ^" w3 X- u# K' I& |; M) x" L3 gmodel7 W4 x) o0 N, k8 V3 q
Error (10821): HDL error at divclk.vhd(42): can't infer register for "shcounter[0]" because its behavior does not match any supported register , H2 I& }1 t Z$ Q. ?' G; I6 Q0 ~
model( G' ~, H e2 J, w
Error: Can't elaborate top-level user hierarchy |
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