5分频

module divfreq(clk, clk1x, rst, clk1xpose, clk1xnege, coutpose, coutnege);

input clk;
C+p1APiHi+H*@v181133input rst;EDA中国门户网站'yi"o(d%t
output clk1x;EDA中国门户网站,[#N.m o%w}d
output clk1xpose;EDA中国门户网站$b X+F6r.t*TQ+~
output clk1xnege;
fSXX9|E*m181133output[2:0] coutpose;EDA中国门户网站~ O_E:[R
output[2:0] coutnege;

reg clk1xpose;
&j5g-F]w#S181133reg clk1xnege;
{2anCd.Z"G181133reg[2:0] coutpose;EDA中国门户网站K'R T iEn? D
reg[2:0] coutnege;

parameter div1 = 2 , div2 = 4;  // div1 ＝ 5 / 2, div2 = 5 - 1

assign clk1x = clk1xpose | clk1xnege;

always@(posedge clk or negedge rst)
Ng U7bH#bDB181133 begin
ODF%C:O/?}W181133  if(!rst)EDA中国门户网站zio[Q;?
  EDA中国门户网站w`)piFm
    clk1xpose = 0;EDA中国门户网站d.A1d9]+v0x Ph
 
3Ls*NP0}#G;o B*n H181133  else if(coutpose == div1)EDA中国门户网站-SfE_AF/x
    clk1xpose = ~clk1xpose;EDA中国门户网站 ]6K%p o-C
  else if(coutpose == div2)
9[6SJq0@x181133    clk1xpose = ~clk1xpose;EDA中国门户网站:Q3S6s3p1co
  else
&iL;o |;vL181133    clk1xpose = clk1xpose;
i
i}g/Mnb181133 end

always@(negedge clk or negedge rst)
~z~&^l0JMh181133 begin
0k X/c~R{Qm`"v&?181133  if(!rst)
5k8LIi/}SW[-c181133 
X\"_)?)h%j7{181133    clk1xnege = 0;
$r8zDt!N%H"s4^ v181133 EDA中国门户网站7O(b8_u El0_B]K
  else if(coutnege == div1)
w%x:uT9O6L7ba181133   clk1xnege = ~clk1xnege;EDA中国门户网站|
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  else if(coutnege == div2)EDA中国门户网站^ucoH1{*P4Mf
   clk1xnege = ~clk1xnege;
j I)] r"M181133  else EDA中国门户网站%`R6G S)^.AO1n
   clk1xnege = clk1xnege;
n$M4Y]#X-h%n;V~6`181133 end

always@(posedge clk or negedge rst)
s7v f3S$W6Y B*k9E181133 beginEDA中国门户网站SHjz5M3B
  if(!rst)
\L{"Vs%]yRzt181133   coutpose = 0;
i
F.m|7d181133  else if(coutpose == div2)EDA中国门户网站Z;L6F"doH5^$m
   coutpose = 0;EDA中国门户网站h:fL:z~.\
  elseEDA中国门户网站7Y2}u-m#c!O
   coutpose = coutpose + 1;EDA中国门户网站
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 end

always@(negedge clk or negedge rst)EDA中国门户网站X,VL:Z&}j
 begin
Q
ikB-Tuxx#a2w181133  if(!rst)EDA中国门户网站~ p](o UwS
   coutnege = 0;
b-k5R3o'|Az `181133  else if(coutnege == div2)
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|'xx:?_181133   coutnege = 0;
Wf/jK1fn181133  else
D$yWMR[181133   coutnege = coutnege + 1;EDA中国门户网站;Rz(P,Z2C&K+n
 end

endmodule