先放我們的實(shí)驗(yàn)要求。實(shí)驗(yàn)要求不一樣的話，慎重參考。









源程序：
//總模塊

module FrequencyCounter(
input [1:0] testmode ,
input sysclk ,
input modecontrol,
output  highfreq,
output [6:0] hex0,
output[6:0] hex1,
output[6:0] hex2,
output[6:0] hex3

);
wire sigin11;
assign highfreq=modecontrol;
signalinput signalin(.testmode(testmode),.sysclk(sysclk),.sigin1(sigin11));
Frequency freq(.sigin11(sigin11),.sysclk(sysclk),.modecontrol(modecontrol),.hex0(hex0),.hex1(hex1),.hex2(hex2),.hex3(hex3));
 
 
endmodule


//頻率計(jì)模塊
module Frequency(sigin11,sysclk,modecontrol,hex0,hex1,hex2,hex3);
    input sigin11,sysclk,modecontrol;
   // output  highfreq;
    output [6:0]hex0,hex1,hex2,hex3;
   
    wire [15:0]countBCD;
    wire [15:0]locker;
    wire OneClk;
    wire enable,reset,lock,sigin12;
   //signalinput siginai(.testmode(testmode),.sysclk(sysclk),.sigin1(sigin11));
   OneHzClk onehz(.sysclk(sysclk),.OneClk(OneClk));
   ControlSig controls(.OneClk(OneClk),.enable(enable),.reset(reset),.lock(lock));
   TenDivideFre tendiv(.sigin(sigin11),.sigin1(sigin12));
   TenCounter tencou(.sigin(sigin11),.sigin1(sigin12),.modecontrol(modecontrol),.enable(enable),.reset(reset),.countBCD(countBCD));
   lockMachine lockma(.lock(lock),.countBCD(countBCD),.locker(locker));
   ShuMa shum(.locker(locker),.hex0(hex0),.hex1(hex1),.hex2(hex2),.hex3(hex3));
  
   endmodule
  
  
//siginal Input Module   
module signalinput(
input [1:0] testmode,//00,01,10,11????4???????3125?250?50?12500Hz???SW1~SW0???
input sysclk,//????50M   
output sigin1//??????
);
reg[20:0] state;
reg[20:0] divide;
reg sigin;
assign sigin1=sigin;
initial
begin
sigin=0;
state=21'b000000000000000000000;
divide=21'b0000000_1111_1010_000000;
end
always@(testmode) begin
case(testmode[1:0])
2'b00:divide=21'b0000000_1111_1010_000000;  //3125Hz
 2'b01:divide=21'b00000000_1111_1010_00000;  //6250Hz
  2'b10:divide=21'b01111_0100_0010_0100_0000;//50Hz
   2'b11:divide=21'b00000_0000_1111_1010_0000;  //12500Hz
    endcase
    end
always@(posedge sysclk)//?divide??
begin
if(state==0)
sigin=~sigin;
state=state+21'b0_00__0000_0000_0000_0000_10;
if(state==divide)
state=27'b000_0000_0000_0000_0000_0000_0000;
end
endmodule


//1Hz clock module
module OneHzClk(sysclk,OneClk);
reg[25:0] state;
reg[25:0] divide;
input sysclk;
output  OneClk;
reg sigin;
assign OneClk=sigin;
initial
begin
sigin=0;
state=26'b00_0000_0000_0000_0000_0000;
divide=26'b10_1111_1010_1111_0000_1000_0000;
//divide=21'b000000_0000_0000_0001000;
end
always@(posedge sysclk)//?divide??
begin
if(state==0)
sigin=~sigin;

state=state+26'b0000_0000__0000_0000_0000_0000_10;

if(state==divide)
state=26'b00_0000_0000_0000_0000_0000_0000;
end
endmodule



//1Hz clk produce control siginal
module ControlSig(OneClk,enable,reset,lock);
input wire OneClk;
output reg enable,reset,lock;
reg countcc;
initial begin
enable=0;
reset=1;
lock=0;
countcc=0;
end
always@(posedge OneClk)
begin
    countcc=countcc+1;
    if(countcc==0)
   begin
      lock=0;
      reset=1;
      enable=1;
   end
   else if(countcc==1)
   begin
       lock=1;
       reset=0;
       enable=0;
   end
end
endmodule

//10 counter module
module TenCounter(sigin,sigin1,modecontrol,enable,reset,countBCD);
    input wire sigin,sigin1,modecontrol,enable,reset;
    output [15:0] countBCD;
    wire sigi;
    assign sigi=modecontrol?sigin1:sigin;
    reg [3:0]count0,count1,count2,count3;
    assign countBCD[3:0]=count0;
    assign countBCD[7:4]=count1;
    assign countBCD[11:8]=count2;
    assign countBCD[15:12]=count3;
    initial begin
        count0=4'b0000;
        count1=4'b0000;
        count2=4'b0000;
        count3=4'b0000;
    end
    always@(posedge sigi or negedge reset)
    begin
        if(!reset)
        begin
           
        count0=4'b0000;
        count1=4'b0000;
        count2=4'b0000;
        count3=4'b0000;
    end
    else
    begin
        if(enable)
        begin
        count0=count0+4'b0001;
 if(count0==4'b1010)
 begin
     count1=count1+1;
     count0=0;
 end
 if(count1==4'b1010)
 begin
     count2=count2+1;
     count1=0;
 end
 if(count2==4'b1010)
 begin
     count3=count3+1;
     count0=0;
 end
 end
 end
end
endmodule


//shiliu wei suocunqi mokuai
module lockMachine(lock,countBCD,locker);
   input lock;
   input wire [15:0]countBCD;
   output reg  [15:0]locker;
   always@(*)
   begin
    if(!lock)
   
    locker[15:0]=countBCD[15:0];
end
   
endmodule




//shumaguan mokuai

module ShuMa(input [15:0]locker,output[6:0] hex0,hex1,hex2,hex3);
   SevenYimaqi seven0(.A(locker[3:0]),.D0(hex0[0]),.D1(hex0[1]),.D2(hex0[2]),.D3(hex0[3]),.D4(hex0[4]),.D5(hex0[5]),.D6(hex0[6]));
   SevenYimaqi seven1(.A(locker[7:4]),.D0(hex1[0]),.D1(hex1[1]),.D2(hex1[2]),.D3(hex1[3]),.D4(hex1[4]),.D5(hex1[5]),.D6(hex1[6]));
   SevenYimaqi seven2(.A(locker[11:8]),.D0(hex2[0]),.D1(hex2[1]),.D2(hex2[2]),.D3(hex2[3]),.D4(hex2[4]),.D5(hex2[5]),.D6(hex2[6]));
   SevenYimaqi seven3(.A(locker[15:12]),.D0(hex3[0]),.D1(hex3[1]),.D2(hex3[2]),.D3(hex3[3]),.D4(hex3[4]),.D5(hex3[5]),.D6(hex3[6]));
endmodule

//qiduan yimaqi mokuai
module SevenYimaqi(input[3:0] A,output D0,D1,D2,D3,D4,D5,D6);
 
 assign D0=!A[3]&&(!A[2])&&(!A[1])&&A[0]||!A[3]&&A[2]&&!A[1]&&!A[0]||A[3]&&A[2]&&!A[1]&&A[0]||A[3]&&!A[2]&&A[1]&&A[0];//1/4/11/13
 assign D1=A[3]&&A[2]&&!A[1]&&!A[0]||!A[3]&&A[2]&&!A[1]&&A[0]||A[3]&&A[2]&&A[1]||A[3]&&A[1]&&A[0]||A[2]&&A[1]&&!A[0];//5/6/11/12/14/15
 assign D2=!A[3]&&!A[2]&&A[1]&&!A[0]||A[3]&&A[2]&&A[1]||A[3]&&A[2]&&!A[1]&&!A[0];//2/12/14/15
 assign D3=!A[3]&&!A[2]&&!A[1]&&A[0]||!A[3]&&A[2]&&!A[1]&&!A[0]||A[3]&&!A[2]&&A[1]&&!A[0]||A[2]&&A[1]&&A[0];//1/4/7/10/15
 assign D4=!A[3]&&!A[2]&&A[0]||!A[3]&&A[2]&&!A[1]||!A[3]&&A[2]&&A[0]||A[3]&&!A[2]&&!A[1]&&A[0];//1/3/4/5/7/9
 assign D5=!A[3]&&!A[2]&&A[0]||!A[3]&&!A[2]&&A[1]||!A[3]&&A[1]&&A[0]||A[3]&&A[2]&&!A[1]&&A[0];//1/2/3/7/13
 assign D6=!A[3]&&!A[2]&&!A[1]||!A[3]&&A[2]&&A[1]&&A[0]||A[3]&&A[2]&&!A[1]&&!A[0];//0/1/7/12

endmodule



//shifenpin mokuai
module TenDivideFre(sigin,sigin1);
input wire sigin;
output reg sigin1;
reg [3:0]count;
reg r;
initial begin
r=1;
sigin1=0;
count=4'b0000;
end

always@(posedge sigin)
begin
   if(count==4'b0100)
   begin
   sigin1=~sigin1;
   count=0;
   end
   else
   count=count+1;
end
endmodule


測試文件：

module FrequencyCounterTest;
     reg [1:0]testmode;
     reg sysclk,modecontrol;
     wire highfreq;
    wire [6:0]hex0,hex1,hex2,hex3;
   
    initial begin
    sysclk=1;
    testmode=2'b01;
    modecontrol=1;
end
   
always #10 sysclk=~sysclk;
FrequencyCounter frecounter(.testmode(testmode),
 .sysclk(sysclk),
.modecontrol(modecontrol),
.highfreq(highfreq),
.hex0(hex0),
 .hex1(hex1),
 .hex2(hex2),
 .hex3(hex3)
);
endmodule


仿真波形：



我能說，自己傻到一定程度了嗎？？
本來早就應(yīng)該出來結(jié)果了，結(jié)果鼻子都撞到了，又折返回來了~~
首先，我竟然一直以為1億（10的8次方）就是1G（10的9次方）！！！！媽蛋，讓我50兆寫成了5兆，我說結(jié)果咋一直是正確結(jié)果的10分之1。。。。。
其次，我用的BCD碼，但是后來在modelsim仿真波形里卻用unsigned格式來看locker中保存的值，我說咋他媽一直是1573這么奇葩的數(shù)。。。。是知道人家是625……傻逼不是一兩天。。

最后，苦逼地，終于寫出來了，過程很艱辛，但是過后心情很舒暢，自信感爆棚啊！！

學(xué)弟學(xué)妹們，如果不幸看到了這篇文章，僅當(dāng)參考，哈~畢竟，還是學(xué)習(xí)還是需要鉆研的。

相關(guān)文章