TA的每日心情 | 擦汗 2020-1-14 15:59 |
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签到天数: 1 天 [LV.1]初来乍到
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最近写的一个SRAM控制器verilog格式 不对的地方高人多指点! _' ~+ c( G, J+ d" A
控制外部SRAM需要注意什么?) Z0 u- L. k* J/ _
在代码风格上如何描述更稳定可靠呢?
& s0 f" @6 ~ B2 U
% e! [9 M Y5 \) |: ~1 `5 Z1 x4 y5 Qmodule SRAM_TEST(
7 E1 ?* ]' i, e E5 a+ { i_Reset_n,
$ l2 Q. U* g3 {$ u/ m i_Clock,% e9 O# [- h( z" t3 k4 t
i_EN,: c, c8 h5 v, P H& D0 j
i_StepByStep,! W( Q+ Y7 A+ O4 q0 m6 v6 J
i_WR_Control,
! B# y: s. p8 k: ?. H8 ~ o_W_FullSign,
& c7 i1 P( Y1 _8 X /* SRAM InteRFace */; |! m- J7 r, `5 h: W
o_Sram_add,; o1 @) `- S- i& C. g
io_Sram_data,
" r4 z8 y6 S- u# Z: c2 p o_Sram_CE_n,
. O. V% y* q/ b7 Z o_Sram_WE_n,- J% L% l( R) s
o_Sram_OE_n,
# z+ ?8 E% E) \0 ] o_Sram_UB_n,
, n6 S- X% m: z7 p o_Sram_LB_n,
& o5 \- z) a! j& l& v; I /* Display */
( T" x9 g: ~; l9 X2 L" ^1 q o_HEX,
$ v8 T! r* ?; k+ } \' Q. m t_HEX); $ [0 u1 ~# Y" `/ u5 j
. c2 |, }* o s9 i# T2 F# M input i_Reset_n;: F( M/ r" E y! f& o" d
input i_Clock;
0 G$ @) d$ a+ D) v$ s6 W input i_EN;
; z& H S& i9 X- i7 | input i_StepByStep;
9 X) Y2 x# M( K2 }3 L: b- Y& Z input i_WR_Control;
: ^- S% m( Q5 ?& S. F* k/ P: q output o_W_FullSign;9 F+ G7 h* a5 s+ o' m
/*SRAM Interface*/7 Z; k9 K4 E+ a0 S- H! [5 w
output [17:0] o_Sram_add;
. w4 ?/ Q/ V1 q2 z inout [15:0] io_Sram_data; & C7 ]2 ~' ?2 B: W4 `0 h
output o_Sram_CE_n;
( ~+ O5 Q1 g4 y, V8 Y: Z3 j8 g output o_Sram_WE_n;
9 S1 X7 `- M% y$ r8 \5 T+ j output o_Sram_OE_n;
& L% a7 I, Y& b5 r) G+ @ output o_Sram_UB_n;
" t+ z5 L5 T- Q7 T, v+ m6 U output o_Sram_LB_n;
8 `# E1 I/ m' w* C3 } /* Display */
9 y* t5 z" @; x8 n( {0 x output [6:0] o_HEX;
& P0 p. r& `- k! f; S output [6:0] t_HEX;5 ^7 r* O8 R- u. Z4 ~+ U
: ~; `- s L0 C# K; M; b- G
reg [6:0] o_HEX;# {; x" i: u6 z& |- s$ w" [, m
reg [6:0] t_HEX;, M* @0 M6 d- w
reg [17:0] o_Sram_add;
$ G* b4 y( ?# ?! g# j( |( u reg [3:0] t_counter;
% |# V' l7 h/ Z* I* z reg o_Sram_CE_n;
) H8 d/ u0 G9 \/ V, F( O( V9 } reg o_Sram_WE_n;* M% r" ]9 {8 @; t! Q# Z
reg o_Sram_OE_n;; F8 {3 M5 S6 U% A' G3 _- N
reg o_Sram_UB_n;
5 T5 p/ P# V8 N5 d5 \ reg o_Sram_LB_n;
, E) n, y6 Q" O# g# S( d( Y' ? reg [15:0] Sram_data_in;
' z/ k& m3 K: @ reg [15:0] Sram_data_out;% V( _& a+ E, \' i4 a- m4 H& M
reg Counter_EN;6 N5 f9 L- E' S/ d
reg [17:0] WADD_Counter; * t2 w1 @, Q+ J3 j7 V1 Z6 s
reg [17:0] RADD_Counter; 8 c5 i9 C; t9 c: Y4 J8 m
reg [15:0] W_data;
+ D m5 M# ]* S( P; u7 o reg o_W_FullSign;
' ], S2 m) g, [5 A* D/ Q reg [2:0] Sram_State; & y* }1 ^, i( G' `9 i$ V# G; C% q
reg i_StepByStep1;
+ c t" R# s- W$ E reg i_StepByStep2;# G+ b {$ b, d( B7 m
reg i_StepByStep3;3 N& K3 m* k7 d7 e
reg i_StepByStep4;- F8 u% k( I( k& S: W% U& v7 Q
reg i_WR_Control1;
a2 E! r$ |* W+ @0 t reg i_WR_Control2;
" a% Z H5 R9 H& I0 `) ^& R2 ^ reg i_WR_Control3;
$ E- D3 Q' Z& j, j+ T
: i9 t6 L. W, [* R8 } always @(posedge i_Clock or negedge i_Reset_n)
& ?# R7 E/ N% P% \3 Y2 B2 p if(~i_Reset_n)
) L7 P3 e" X7 l$ E Counter_EN<=0;
9 |5 e6 A9 d; a! |, ^$ ] else begin
0 }7 I! x' K) U# @/ s! i% o6 c if(i_EN) 3 n3 j9 L3 Q7 O" U# n' e
Counter_EN<=0;
+ t' F& Y. y8 y/ g- c0 o5 e else
x6 Z6 G7 ~6 b- z7 G& } Counter_EN<=~Counter_EN; 4 \" m% n/ w- n! Q! ]0 T% F
end u8 \+ m3 F6 W, [5 @3 \
0 y8 ]- ?- G9 ]7 O always @(posedge i_Clock or negedge i_Reset_n)begin
# V8 D. U- n" b5 v. `8 ^/ l t if(~i_Reset_n)begin
* ~" w( o. M7 N4 m; ]& M( H i_StepByStep1<=1; & |, i% W5 i5 i: K1 i( u, x
i_StepByStep2<=1;
6 m/ k) z1 j6 A! ^* l i_StepByStep3<=1;3 `; R# {4 h9 e' b* R+ E( }
i_StepByStep4<=0;3 \* |9 b. v" A* O5 } h
i_WR_Control1<=1;
5 ?9 w8 R: V; z0 L" g0 ]; ?: I$ Z i_WR_Control2<=1;
# n' `$ ^ X+ j/ t# Y, g$ g i_WR_Control3<=1;
{ n% g- p q5 v1 X+ ] end: @ R5 n( }; R4 T% a i' B
else begin
4 P C! t* E* Y) t! K1 { i_StepByStep1<=i_StepByStep;$ b" h) @; r+ M8 n( V. |) n
i_StepByStep2<=i_StepByStep1;
9 q7 {; p9 ?0 |9 `4 |* j9 u i_StepByStep3<=i_StepByStep2;
* g' u. K; M* G5 d7 ^2 C# H i_StepByStep4<=(i_StepByStep2 ^ i_StepByStep3) & i_StepByStep3;! a6 `* s1 w& w: ^. x
i_WR_Control1<=i_WR_Control;
2 I4 \" s" b; J# i i_WR_Control2<=i_WR_Control1;
. T9 ~1 X7 b9 J7 C i_WR_Control3<=i_WR_Control2;
7 V: `# p1 p) r0 U4 m end
1 V b" s# n8 N: ?; Z end
* X, ]% a& X; j- z! }: B3 L: |9 X
9 t% T R m: `/ M2 Y9 W2 i always @(posedge i_Clock or negedge i_Reset_n)
& Y$ t6 m' b# M8 Z4 o; J0 [ if(~i_Reset_n)begin 6 V6 S! t2 T1 P' z {/ A
WADD_Counter<=0; 6 D5 ^% q. @' Z4 D9 M* u
o_W_FullSign<=1;- u: R( P8 P& Q' i" M7 [' F
end
$ c& T* `. _ n2 ~3 e* Y else begin
+ H2 V' ~5 B/ p M6 b& ^ if(i_WR_Control3 &i_StepByStep4==1)0 M( v+ T" e/ s
if(WADD_Counter==15)begin # ]# B; x0 Q: y/ L) C
WADD_Counter<=WADD_Counter; 9 B3 e. a" y4 x8 B1 G8 q9 L
o_W_FullSign<=0;
" W5 a" W( s! X( m: Y0 {# B) p end
" a4 U& {5 p0 T else begin 1 x) O. L+ U0 P# h; ^$ K
WADD_Counter<=WADD_Counter+1;
- \5 M5 H0 b: O. |1 X( z o_W_FullSign<=o_W_FullSign;2 K! S$ B% D2 c& L- q5 T% G
end
$ i" L! f9 y# z! N else begin * E `# C& n. t1 X) I
WADD_Counter<=WADD_Counter;
. i# O% A% M0 b/ W4 `5 U o_W_FullSign<=o_W_FullSign;
# W2 l/ D8 h9 x' H7 A) D end 8 G& v3 ~* c* P9 o/ f! D" a/ d
end8 U( i: o7 `9 w
" ^! Y4 N, h+ N+ u$ |9 a
always @(posedge i_Clock or negedge i_Reset_n)
9 O& W# C& W# h% \" f if(~i_Reset_n)begin
0 d' V9 ` ~2 a! K* v W_data<=0;
- D4 k, x8 i6 l6 {6 ~ end F$ e" W8 d& N
else begin; c4 |/ n; s8 v: r) {4 }- U
if(i_WR_Control3 &i_StepByStep4==1)6 Y8 @. f8 G( V0 {. q5 I
if(W_data==15) : B6 i5 J$ `; ]
W_data<=W_data;! R3 r' z0 m6 I# d& q
else, f* V ?! _4 X5 C# Q4 t
W_data<=W_data+1;
6 p- [) a2 H( n# g else/ \, o8 i$ v5 {$ |: F
W_data<=W_data; ( u4 o5 a* Q4 A; v
end9 G; o* H. A- _. Y3 S1 I
4 P1 \: Y1 N; u always @(posedge i_Clock or negedge i_Reset_n)
7 I& @8 k1 w/ R* x4 J- E2 { if(~i_Reset_n)
0 ]- n6 F+ z7 X) m: P! p- T RADD_Counter<=15;! v* @* B" a: O
else begin
7 d o4 s' J& p6 {3 {/ k if(i_StepByStep4==1 & ~i_WR_Control3)
, x$ f( r9 @3 l7 b# k1 Y& k if(RADD_Counter==0)5 k& }4 r' z# N8 r+ h2 S9 Z
RADD_Counter<=15;
8 k6 X6 |) ~; p1 y3 g4 \ J5 b else1 k5 Q0 P$ i( U
RADD_Counter<=RADD_Counter-1;
$ z5 i2 Y* X) F- j: z else
+ [' B+ o) u- N, s4 M! G S RADD_Counter<=RADD_Counter; # e8 l; J/ F T1 ~8 \3 ?6 E
end$ Y0 s/ J8 ?0 a `6 _
! A0 @; u4 u0 S0 t6 S parameter IDLE =3'b000;. X+ i( _6 ^) k, \8 q
parameter READ =3'b001; 0 {! P+ h; e$ J S6 P( E. q
parameter WRITE =3'b010;
& G4 X% \ B! i 5 ]5 \; j* E& ~8 K
always @(posedge i_Clock or negedge i_Reset_n)6 X; H+ `3 Y; @% r" g1 Y% ^
if(~i_Reset_n)begin 2 P' u d3 E$ u4 Y" k; d
Sram_State<=IDLE;
: h& l. p/ {3 r, C7 W) I E o_Sram_add<={16{1'b0}};0 O9 w& V' E+ {9 W' J
Sram_data_in<={16{1'b0}};7 E; {! L+ Y* K- w; ~3 C
Sram_data_out<={16{1'b0}};5 H0 B; D$ S# v, d3 T
o_Sram_CE_n<=1;2 E3 i; y& [4 }$ B+ e
o_Sram_WE_n<=1;* q. ?1 x% T' Z8 f5 o
o_Sram_OE_n<=1;' |3 l$ {5 M2 \5 p
o_Sram_UB_n<=1;$ b" `" S( ^5 V6 b
o_Sram_LB_n<=1;
; {" `& Q! v9 ? x end5 {1 @0 G) [; ~" F! g" u0 v
else begin # e. ^; O8 R$ B) m# K
case(Sram_State) 2 }3 q3 e3 z5 A, c$ v
IDLE:begin
5 F% N; P* `" p2 }3 ^ if(~i_EN)begin ; J1 M J, P' | ?/ @" |
if(i_WR_Control3)begin
" A$ F; Z5 a! _3 a5 L Sram_State<=WRITE; r! e5 O5 \0 \, u5 [/ }6 A9 V! G7 q
o_Sram_add<=WADD_Counter;
. ~( l/ L# G) g Sram_data_in<={16{1'bz}};
+ Q) P% m) w0 ? Sram_data_out<=Sram_data_out;
" I0 t1 O2 @1 J: d2 P o_Sram_CE_n<=0;* r ^* y+ v, D5 I6 `$ Y0 K" r
o_Sram_WE_n<=0;
( {' ^4 _0 L3 L9 X) Q( H o_Sram_OE_n<=1;
- \$ z, s- Z b/ | o_Sram_UB_n<=0;$ W8 g: T0 e! ]( P
o_Sram_LB_n<=0;
2 K Z; }; }% K5 u: K2 Z# [ end , |# t# n" v8 e$ g+ o* |9 S
else begin ! K) a4 Q/ X' P8 v7 i! u' s# C
Sram_State<=READ;
8 h5 `- o2 d- J2 q8 ?# r o_Sram_add<=RADD_Counter;
7 u/ y/ T" H' g) _ Sram_data_in<=Sram_data_in; _( H; e4 s% \# ?3 I0 l9 T
Sram_data_out<={16{1'bz}};
' [1 l; H! |' g" G$ } o_Sram_CE_n<=0;, u2 F2 s; G# `8 y
o_Sram_WE_n<=1;4 i7 J" |1 e$ s" x4 o0 s
o_Sram_OE_n<=0;( L. U3 \4 e# s* p# }2 J ?6 J
o_Sram_UB_n<=0;. {) N* Z! g9 z& ?3 p5 W& ?# y- h1 H/ a
o_Sram_LB_n<=0;
" q2 h2 c6 t, M# k$ ^! v end 0 i3 T& i, b J5 m, @
end
+ J' ? e& w1 K# U else begin
/ P) Y2 G0 Y( O! e: l Sram_State<=IDLE;
" K0 \8 B! u+ F2 n% M o_Sram_add<=0;
' ^% t* m3 ]! c1 K4 x Sram_data_in<={16{1'b0}};5 R5 g$ J6 D) x4 k) c
Sram_data_out<={16{1'b0}};( y, U0 A1 C' h2 Y; q7 G
o_Sram_CE_n<=1;
# J4 v3 ~* E6 }2 J o_Sram_WE_n<=1;7 Q$ s% U& G5 c7 I/ A7 I
o_Sram_OE_n<=1;
( M J( M1 G* O2 G) [: P o_Sram_UB_n<=1;
" a+ K3 @' s I& n( z1 @1 y o_Sram_LB_n<=1;- J) q+ C& [3 D
end : m$ e2 T0 [" A U' u& y2 x3 X/ F" i
end
& ~6 B7 F: v: { READ:begin
5 o+ M! C4 ]2 Q* b1 _5 D; `, ~ Sram_State<=IDLE;/ t# M7 L3 ] Y# U5 G/ g9 r
o_Sram_add<=RADD_Counter;
K9 p8 t+ n* z! w9 _ Sram_data_in<=io_Sram_data;
9 S! z9 s6 A8 o2 N. l) B Sram_data_out<={16{1'bz}};: f. }0 X" Z; f. C I) H( [1 h+ {$ L
o_Sram_CE_n<=0;
, ~& m0 u- i2 U# j, n o_Sram_WE_n<=1;
6 z6 t2 v2 i: J, q9 v, _4 [ o_Sram_OE_n<=0;
5 d/ B. u3 S9 _2 ^! m o_Sram_UB_n<=0;
8 z, b( S0 B$ v9 [% M: L4 K o_Sram_LB_n<=0;
! ~) f1 O! T5 M; [. F5 B/ k$ K end
$ ~8 n% ~2 ~: S" l; p* ~( d% ~ WRITE:begin/ I6 C# T% U% V; I+ g" S
Sram_State<=IDLE;$ k% J& |1 ?* y) v4 c% O0 w
o_Sram_add<=WADD_Counter;
6 y6 p3 Z3 p# I3 c$ s Sram_data_in<={16{1'bz}};
9 ]; }9 R! o* `5 b7 e" |3 H Sram_data_out<=W_data;: N3 q' ~$ e7 v1 N' |9 d4 C
o_Sram_CE_n<=0;( _% J) `) q' f0 Z1 J& O
o_Sram_WE_n<=0;4 U& e; |5 z% B5 t& D% ^0 }( }5 d
o_Sram_OE_n<=1;
1 l. n: \& p- q! ]+ B2 ] o_Sram_UB_n<=0;) ?/ Y& z. {" B& d9 R
o_Sram_LB_n<=0; : b. N9 T9 e: a2 ], O: ?3 e; n
end* N% D% Q8 z- S: s% ~ S* v
default:begin # f! Z# F$ s1 n7 }' s, T5 c9 f
Sram_State<=IDLE;: c: Y" N$ S4 C/ \
o_Sram_add<=0;
+ k- R' n3 O. Q3 x) ^ Sram_data_in<={16{1'bz}};
/ C, _4 d2 |7 O/ S4 V Sram_data_out<={16{1'bz}};6 A' f5 i; |& b6 ^
o_Sram_CE_n<=1;
/ `% Y# D+ K9 T: T o_Sram_WE_n<=1;- t2 O' d, E* t: O
o_Sram_OE_n<=1;
/ g# q0 B; b4 d4 @5 Z, P5 B8 ~/ } o_Sram_UB_n<=1; k1 d6 o0 ?. f
o_Sram_LB_n<=1;% g9 r2 k, b( V9 |: P
end+ V4 `8 L R9 e1 _" x3 R0 |
endcase
}1 x, D* Z4 x$ q; ? end! U+ t3 [& t' W: b' H$ R7 I
assign io_Sram_data=(i_WR_Control3)? Sram_data_out:{16{1'bz}}; ! P5 N" ~: c1 V1 Q
; k6 _& O* a$ @: }+ O& \ always @(posedge i_Clock or negedge i_Reset_n)- \# H4 K; [8 Q+ [1 @) B% K+ o
if(~i_Reset_n) : S' x- V- l1 f2 L! z4 B
o_HEX<=7'b1000000;
- L2 f Z: s8 ~- a# ^7 e else begin / N1 c0 n; m. r8 h1 x
if(i_WR_Control3)! N' ]; H0 o2 h+ O% }
case(Sram_data_out[3:0])3 V* H3 _7 G: h1 @5 K
4'b0000 _HEX<=7'b1000000;
9 `4 W; @9 r1 i# Z3 D) E6 m 4'b0001 _HEX<=7'b1111001;
3 r: s/ ?! W& f! H$ Q7 h9 U9 g# p 4'b0010 _HEX<=7'b0100100;$ d' W- D. [4 p$ s- M$ {) D' g8 ^. y* _
4'b0011:o_HEX<=7'b0110000;# P" u @% X" u2 w* L- @0 M# t8 u; Q
4'b0100:o_HEX<=7'b0011001;1 t& P1 h! Y# u' j$ H
4'b0101:o_HEX<=7'b0010010;
: m5 W5 r1 u7 o' Q0 u2 v 4'b0110:o_HEX<=7'b0000010;
C, _' Y( V$ a" T4 J3 z; [$ w 4'b0111:o_HEX<=7'b1111000;* ~( ^: G, j! ?4 V) v5 c/ \
4'b1000:o_HEX<=7'b0000000;8 N: k7 F9 w3 P0 c7 _5 n% U, H5 }
4'b1001:o_HEX<=7'b0010000;, ]! Y) ~- R6 l5 D+ X- K4 ?
4'b1010:o_HEX<=7'b0001000;7 M! W; C3 P2 p* h' y, W, A8 Z% P
4'b1011:o_HEX<=7'b0000011;
: K. A0 A5 i: e" ~2 o1 k 4'b1100:o_HEX<=7'b1000110;9 c. z0 {3 W, W$ o- W
4'b1101:o_HEX<=7'b0100001;) J C' H, s( z1 u6 f
4'b1110:o_HEX<=7'b0000110;" t* B0 B% n+ `' J2 f% k; }8 [& e
4'b1111:o_HEX<=7'b0001110;; ~. |6 s+ W) M5 F4 B4 m/ F. S
default:o_HEX<=7'b1000000;
7 j, T( ?. c5 R! V; v; z endcase
. k: V2 k6 H$ M else/ ?& F1 B. D7 }: C( p* [
o_HEX<=7'b1000000; ' ?' p8 G/ j D7 L( t
end
9 m1 _: f) Q! @; H0 X1 g/ P ' [9 N+ {' M6 i
always @(posedge i_Clock or negedge i_Reset_n): ]# Q# W4 i7 R5 t
if(~i_Reset_n); S' k9 y1 l6 o# d
t_HEX<=7'b1000000; 2 B ~1 Q2 o2 s* A- L: ?
else begin
2 @/ P4 o6 g, d# t5 C case(Sram_data_in[3:0])
/ m+ D& F# B4 Z4 U! S 4'b0000:t_HEX<=7'b1000000;
$ E3 E! P+ }3 Q7 p( z 4'b0001:t_HEX<=7'b1111001;% W# Q2 B( X9 B$ @8 ]
4'b0010:t_HEX<=7'b0100100;7 B' `9 E$ G$ T" Q9 L8 E
4'b0011:t_HEX<=7'b0110000; P2 Z4 j B) _7 a! Y+ j
4'b0100:t_HEX<=7'b0011001;" q) }- D0 b4 g! R# [& @$ S1 d% Q
4'b0101:t_HEX<=7'b0010010;9 C8 t/ X, l3 G* W: L( Z
4'b0110:t_HEX<=7'b0000010;( e6 i+ J' C' O' L+ h8 z0 s
4'b0111:t_HEX<=7'b1111000;( N0 B+ Z J) R. i% [
4'b1000:t_HEX<=7'b0000000;+ x' x# G# |3 \
4'b1001:t_HEX<=7'b0010000;0 O" z+ V+ A: H" D, g0 E+ P+ V! B; c! s
4'b1010:t_HEX<=7'b0001000;% k1 z: a) r* J) k
4'b1011:t_HEX<=7'b0000011;* I4 G$ @+ q+ G
4'b1100:t_HEX<=7'b1000110;
3 L+ o! ~! h9 v6 x4 T0 E 4'b1101:t_HEX<=7'b0100001;
7 X. q0 t6 |/ Z7 { q 4'b1110:t_HEX<=7'b0000110;, Q8 I. w/ s6 u% M: A- R
4'b1111:t_HEX<=7'b0001110;
& H/ b) u' J7 c Z# B% Y( {! } default:t_HEX<=7'b1000000;
( P8 O* |$ }5 v% \9 { endcase
6 }, S' q& x- n. V1 ?0 X end
. Z' O: F8 _5 W, B( r8 n
% a5 E* V9 ]' ?- z4 dendmodule |
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