medelsim遇到只有输入波形没有输出波形的问题

只看该作者 · 2011-5-25 09:10

大家好，我用的是modelsim6.1，遇到了只有输入只有振荡波形，输出为0，请大侠帮帮忙！！！！
头文件：
module fz;
// Inputs
reg clk_36M;
reg rst;
// Outputs
wire dateout1;
wire dateout2;
wire dateout3;
// Instantiate the Unit Under Test (UUT)
NO2 uut (
  .clk_36M(clk_36M),
  .dateout1(dateout1),
  .dateout2(dateout2),
  .dateout3(dateout3),
  .rst(rst)
);

initial
  begin
  // Initialize Inputs
  clk_36M = 0;
  #100 rst = 0;
  #130 rst = 1;
  //forever
  //#100 clk_36M=~clk_36M;
  end
  forever
  #100 clk_36M=~clk_36M;


endmodule

程序内容：
module NO2(
clk_36M,
dateout1,
dateout2,
  dateout3,
  rst,
);
  input clk_36M;
  input rst;
  output dateout1;
  output dateout2;
  output dateout3;
  reg dateout1;
  reg dateout2;
  reg dateout3; //死区报警指示
  reg clk_div1;
  reg clk_div2;
  reg[24:0]count;
  reg[24:0]count1;

  always @ (posedge clk_36M)
  begin
/*模拟信号的产生*/
  if(count==25000000)                               //用户定义波形周期，25M/36M
  count<=0;
  else
begin
  count<=count+1;
begin
   if(count>15900000 && count<20000000)          //clk_div1为1时的输出时间
   clk_div1<=1;
   else
   clk_div1<=0;
   if(count>10000000 && count<16000000)    //clk_div2为1时的输出时间
   clk_div2<=1;
   else
   clk_div2<=0;
end
end
end
/*输入信号重叠是，死区告警*/
always @(posedge clk_36M or negedge rst )
  if(!rst)                //复位电路
begin
dateout3<=0;
dateout2<=0;
dateout1<=0;
end
  else
begin
if( ((clk_div1&&clk_div2)!=1) && ((dateout2&&dateout1)!=1) ) //当输入信号和输出信号不同是为1时
begin
dateout3<=0;
dateout2<=clk_div2;
dateout1<=clk_div1;
end
else
begin
   if(count1==6000000)             //当输入信号或者输入信号同时为1，计数器count1=6000000时。
   count1<=0;
   if( ((clk_div1&&clk_div2)!=1) && ((dateout2&&dateout1)!=1))
   begin
   dateout3<=0;
   dateout2<=clk_div2;
   dateout1<=clk_div1;
   end
   else                //当输入信号或者输入信号同时为1，计数器不为6000000的情况下。
   begin
   dateout3<=1;
   dateout2<=0;
   dateout1<=0;
   count1<=count1+1;
   end
end
end
endmodule