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写一个复位模块
0 U4 p* v7 q# V7 b8 E, _# e然后在此模块中把要设置的初值设好
4 R2 T1 C! z/ N0 c! d举个例子9 S0 U& B, M4 M$ E- D
module SHORT_RESET(0 N6 u1 A+ u$ q, d4 ?! e1 G) f
inpu wire Clk,5 @9 C6 O7 G+ f
output reg Reset_n
3 y" d! _6 j( L3 F: Y# c9 Q);# m. E: ~7 F; h
parameter U_DLY = 2;- k1 ~: k- T# `
parameter RSTCNT_LENGTH = 12'd2499;0 J" `+ K* x4 P
parameter RSTCNT_WIDTH = 12;
" d/ J7 r A1 X6 v5 n% Oreg [RSTCNT_WIDTH-1:0] Rst_Cnt;4 |, O# J! X) P6 \& f# q
always @ ( posedge Clk )
0 B7 k5 A J$ r# s8 i. Rbegin
: |( l6 z6 D5 P) Q" oif ( Rst_Cnt == RSTCNT_LENGTH )
$ c |2 f! h$ U, ^+ _# d7 Z4 Sbegin8 `3 A' U# h# V6 L% A1 g* F6 e. o7 N
Rst_Cnt <= RSTCNT_LENGTH;
4 ?/ T" s# o& z, y$ Cend
9 L: T. b/ J6 [+ Celse if ( Rst_Cnt < RSTCNT_LENGTH )
" |8 T% T9 [' W) l% Tbegin" B6 \2 m/ M t7 R3 y. J# n
Rst_Cnt <= Rst_Cnt + 1'b1;/ g9 O# j! b* C1 Q
end
* ?, i( G$ h4 g, uelse begin
/ j1 [1 o( C1 |+ N6 P3 ERst_Cnt <= {(RSTCNT_WIDTH){1'b0}};
4 [ N. z/ Z& |' ]' b' J+ s1 Kend/ u: C; |1 B7 F: ^( J2 _
end$ }7 B" V/ T0 t7 }& ^6 u" {! I$ E
//在此模块中对你所要的赋初值的寄存器赋值+ r% ~1 W, |5 a! C( V4 ]1 T' ~
always @ ( posedge Clk )1 Z% ~: U% }5 J
begin
3 z* c! ], x) ^: lif ( Rst_Cnt == RSTCNT_LENGTH )
2 R! _/ C$ I! w( d9 F5 N) Cbegin! n2 J9 s4 v- I3 }7 @* u6 W
Reset_n <= 1'b1;/ J4 u/ j4 H, V5 H# c
end
( X" t+ G" y3 K" g/ _9 ]else begin
. w7 y, \3 d4 L) B% i4 _Reset_n <= 1'b0;
7 q2 E" O% j# Lend
* R* o% Y( N1 F9 W: ?8 mend
( S; F2 m7 P6 w" N v0 V5 Yendmodule |
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发表于 2022-11-18 13:58
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支持！
反对！