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process(clk40)' S' A, c8 p: i5 h
variable cnt:integer range 0 to 39999999;( J6 w1 G( U, h$ `7 g( i: Y9 f
constant final : integer := 39999999 ;- Z9 e9 H! h0 P% L# N
begin; X6 s- F+ _6 s4 |, ]! `
if clk40'event and clk40='1' then" q! K2 A; m: j: Y3 n" S4 A. a1 R
if cnt= final then7 O. I# d, v& [5 @
cnt:= 0 ;
+ ^3 I9 j& [% u9 K% t else
p7 |! x, p/ e0 O' u cnt:= cnt+1;- G1 x* [+ J/ U/ _ V# k
end if ;. W# }, S6 h; ~8 c# D- U
if cnt>= 20000000 then
# K6 ?1 O0 D, o( B clk1 <= '1' ;
: E& b" r! p$ u3 M& c. {4 B else. }4 P2 |- l! E" _) q
clk1<= '0' ;
5 I$ D) L: h0 _- j$ D% k end if ;$ D8 q9 K' Z7 j- k. I$ C! D' I+ U# [
end if ;
1 X, b; S/ S/ Z# b! }8 A; r end process;
2 A$ g9 x3 `! N8 r" w9 R
% x: ]- ]% t5 s5 X3 ~" E K$ X之前有addn詢問~但是都不行~這是我後來成功的!! 所以分享給大家!! |
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