奇数分频器(verilog)

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1、奇数分频器  /***********************************************************         Filename      :      odd_divider.v         Author         :      Cardinal         Company     :      Cardinal         Revision      :      2010/03/1517:20         Description   :      Ex

2、erciseofaodddivider         描述          :      这是一个奇数分频器                               奇数分频法有多种实现方式，这里采用的是                               错位相“或”法.这里实现的实现的是3分频                               占空比是50%，类似可以实现任意的N次奇数                                分频*******************

3、***************************************/moduleODD_DIVIDER(   clk_in,   rst_n,   clk_out   );            parameter         width=2;            input               clk_in;      input               rst_n;      output            clk_out;            reg      [width-1

4、:0]      cnt_posedge,cnt_negedge;      reg                           clk_1toN_p,clk_1toN_n;            always@(posedgeclk_in)      //上升沿分频，占空比1:2         begin            if(!rst_n)               begin                  cnt_posedge<=0;                  clk_1toN_p

5、<=0;               end            else   if(cnt_posedge==2'b10)                           cnt_posedge<=0;                     else                           begin                              cnt_posedge<=cnt_posedge+1;                              clk_1toN_p<=~

6、clk_1toN_p;                                                            end         end               always@(negedgeclk_in)      //下升沿分频，占空比1:2         begin            if(!rst_n)               begin                  cnt_negedge<=0;                  clk_1toN_n<=

7、0;               end            else   if(cnt_negedge==2'b10)                           cnt_negedge<=0;                     else                           begin                              cnt_negedge<=cnt_posedge+1;                              clk_1toN_n<=~cl

8、k_1toN_n;                                                            end         end               assignclk_out=clk_1toN_n

9、

10、clk_1toN_p; //错位相或                     en