这数电实验做的我要吐了

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实验1：五输入表决器设计

源码

module first(K,m_Result);
	input[5:1] K;
	output m_Result;
	integer i;
	reg m_Result;
	reg[2:0] sum;
	always@(K)
	begin
	sum=0;
	for(i=1;i<=5;i=i+1)
		if(K[i]) sum=sum+1;
	if(sum>=3) m_Result=1;
	else m_Result=0;
	end
endmodule

测试代码

module test;

	// Inputs
	reg [5:1] K;

	// Outputs
	wire m_Result;

	// Instantiate the Unit Under Test (UUT)
	first uut (
		.K(K), 
		.m_Result(m_Result)
	);

	initial begin
		// Initialize Inputs
		K = 0;

		// Wait 100 ns for global reset to finish
		#100;
        
		// Add stimulus here
		#100;
		K[0]=0;K[1]=1;K[2]=1;K[3]=0;K[4]=0;
		
		#100;
		K[0]=0;K[1]=1;K[2]=1;K[3]=0;K[4]=1;
		
		#100;
		K[0]=1;K[1]=1;K[2]=1;K[3]=1;K[4]=1;
		
		#100;
		K[0]=1;K[1]=1;K[2]=0;K[3]=0;K[4]=0;
	end
      
endmodule

实验2：多路数据选择器设计

源码

module second(sel,in1,in0,en,out);
	input[1:0] sel;
	input[3:0] in1,in0;
	input en;
	output reg[1:0] out;
	always@(sel && !en) begin
		if(!en) begin
			case({sel[1],sel[0]})
				2'b00: begin out[1]=in1[0];out[0]=in0[0]; end
				2'b01: begin out[1]=in1[1];out[0]=in0[1]; end
				2'b10: begin out[1]=in1[2];out[0]=in0[2]; end
				2'b11: begin out[1]=in1[3];out[0]=in0[3]; end
				default:begin out[1]=0;out[0]=0; end
			endcase
		end
		else begin out[1]=0;out[0]=0; end
	end
endmodule

测试代码

module test2;

	// Inputs
	reg [1:0] sel;
	reg [3:0] in1;
	reg [3:0] in0;
	reg en;

	// Outputs
	wire [1:0] out;

	// Instantiate the Unit Under Test (UUT)
	second uut (
		.sel(sel), 
		.in1(in1), 
		.in0(in0), 
		.en(en), 
		.out(out)
	);

	initial begin
		// Initialize Inputs
		sel = 0;
		in1 = 0;
		in0 = 0;
		en = 0;

		// Wait 100 ns for global reset to finish
		#100;
        
		// Add stimulus here
		#100;
		en=1;
		
		#100;
		en=0;
		in1[0]=1;in0[0]=1;
		in1[1]=1;in0[1]=0;
		in1[2]=0;in0[2]=1;
		in1[3]=0;in0[3]=0;
		sel[0]=0;sel[1]=1;
		
		#100;
		en=0;
		in1[0]=1;in0[0]=1;
		in1[1]=1;in0[1]=0;
		in1[2]=0;in0[2]=1;
		in1[3]=0;in0[3]=0;
		sel[0]=0;sel[1]=0;
		
		#100;
		en=0;
		in1[0]=1;in0[0]=1;
		in1[1]=1;in0[1]=0;
		in1[2]=0;in0[2]=1;
		in1[3]=0;in0[3]=0;
		sel[0]=1;sel[1]=1;
		
		#100;
		en=1;
		in1[0]=1;in0[0]=1;
		in1[1]=1;in0[1]=0;
		in1[2]=0;in0[2]=1;
		in1[3]=0;in0[3]=0;
		sel[0]=0;sel[1]=1;
		
		#100;
		en=0;
		in1[0]=1;in0[0]=1;
		in1[1]=1;in0[1]=0;
		in1[2]=0;in0[2]=1;
		in1[3]=0;in0[3]=0;
		sel[0]=0;sel[1]=0;
		
	end
      
endmodule

实验5：数值比较器设计

源码

module five(
	input wire[3:0] a,
	input wire[3:0] b,
	output reg[2:0] y
    );
	always@(a or b) begin
		if(a>b) y<=3'b011;
		if(a==b) y<=3'b101;
		if(a<b) y<=3'b110;
	end
endmodule

测试程序

module test5;

	// Inputs
	reg [3:0] a;
	reg [3:0] b;

	// Outputs
	wire [2:0] y;

	// Instantiate the Unit Under Test (UUT)
	five uut (
		.a(a), 
		.b(b), 
		.y(y)
	);

	initial begin
		// Initialize Inputs
		a = 0;
		b = 0;

		// Wait 100 ns for global reset to finish
		#100;
        
		// Add stimulus here
		#100;
		a=4'b0011;b=4'b1010;
		
		#100;
		a=4'b1110;b=4'b1110;
		
		#100;
		a=4'b1010;b=4'b1010;
		
		#100;
		a=4'b1110;b=4'b0010;
	end
      
endmodule

实验8:RS触发器

module RS(q,qb,r,s,clk); 
output q,qb; 
input r,s,clk; 
reg q; 
assign qb=~q; 
always @(posedge clk) 
	case({r,s}) 
		2'b01:q<=1'b1; 
		2'b10:q<=1'b0; 
		2'b11:q<=1'bx; 
	endcase 
endmodule

测试程序

module tt8;

	// Inputs
	reg r;
	reg s;
	reg clk;

	// Outputs
	wire q;
	wire qb;

	// Instantiate the Unit Under Test (UUT)
	RS uut (
		.q(q), 
		.qb(qb), 
		.r(r), 
		.s(s), 
		.clk(clk)
	);

	initial begin
		// Initialize Inputs
		r = 0;
		s = 0;
		clk = 0;

		// Wait 100 ns for global reset to finish
		#10;
		r = 0;
		s = 0;
	#20;
		r = 0;
		s = 1;
	#40;
		r = 1;
		s = 0;
	#60;
		r = 1;
		s = 1;
	end
	always #10 clk = ~clk;
      
endmodule

实验9:D触发器

module D(r,s,cp,d,q,qn);
input r;
input s;
input cp;
input d;
output q;
output qn;
reg q;
reg qn;
always@(posedge cp)
	begin
		if({r,s}==2'b01)
			begin
				q <= 1'b0;
				qn <= 1'b1;
			end
		else if({r,s}==2'b10)
			begin
				q <= 1'b1;
				qn <= 1'b0;
			end
		else if({r,s}==2'b11)
			begin
				q <= d;
				qn <= ~d;
			end
		end
endmodule

测试程序

module tt9;

	// Inputs
	reg r;
	reg s;
	reg cp;
	reg d;

	// Outputs
	wire q;
	wire qn;

	// Instantiate the Unit Under Test (UUT)
	D uut (
		.r(r), 
		.s(s), 
		.cp(cp), 
		.d(d), 
		.q(q), 
		.qn(qn)
	);

	initial begin
		// Initialize Inputs
		r = 0;
		s = 0;
		cp = 0;
		d = 0;

		// Wait 100 ns for global reset to finish
		#100;
			r=0;s=1;cp=1;d=1;
		#100;
			r=1;s=1;cp=1;d=1;
		#100;
			r=1;s=1;cp=0;d=0;
		#100;
			r=0;s=1;cp=0;d=1;
		#100;
			r=0;s=1;cp=1;d=0;
		#100;
			r=0;s=0;cp=1;d=1;
		// Add stimulus here

	end
      
endmodule

实验10:JK触发器

module jk(input J,input K,input clk,input rst_n,output reg Q);
always @(posedge clk or negedge rst_n)
  if(!rst_n) Q <= 1'b0;
  else 
    case({J,K})
	  2'b00: Q <= Q;
	  2'b01: Q <= 0;
	  2'b10: Q <= 1;
	  2'b11: Q <= ~Q;
	endcase
endmodule

测试程序

module tt10;

	// Inputs
	reg J;
	reg K;
	reg clk;
	reg rst_n;

	// Outputs
	wire Q;

	// Instantiate the Unit Under Test (UUT)
	jk uut (
		.J(J), 
		.K(K), 
		.clk(clk), 
		.rst_n(rst_n), 
		.Q(Q)
	);

	initial begin
		clk = 0;
	rst_n = 1;
	#10;
		J = 0;
		K = 0;
	#10;
		J = 0;
		K = 1;
	#10;
		J = 1;
		K = 0;
	#10;
		J = 1;
		K = 1;
	end
	always #10 clk = ~clk;
endmodule

实验11:同步二进制计数器设计

module counter2(q,cout,r,clk); 
output[3:0] q; 
output cout; 
input r,clk; 
reg[3:0] q; 
reg cout; 
always @(posedge clk) 
	begin q=q+1;  
		if(r) q=4'b00; 
		else if(q==4'b1111)
			cout=cout+1; 
		else cout=cout;  
	end 
endmodule

测试程序

module t11;

	// Inputs
	reg r;
	reg clk;

	// Outputs
	wire [3:0] q;
	wire cout;

	// Instantiate the Unit Under Test (UUT)
	counter2 uut (
		.q(q), 
		.cout(cout), 
		.r(r), 
		.clk(clk)
	);

	initial begin
		// Initialize Inputs
		r = 0;
		clk = 0;

		// Wait 100 ns for global reset to finish
      forever#20 clk = ~clk;  
		// Add stimulus here

	end
	initial begin     
		#30 begin
				r=1;
			end   
		#200 begin 
				r=1;
			end   
		#345 begin
				r=0;
			end   
	end
      
endmodule

实验12:十进制计数器设计

module cnt10(clk_k,clk,clr,ena,sum,cout); 
input clk,clk_k,clr,ena; 
output[3:0] sum; 
output cout;  
reg[3:0] sum; 
reg cout;  
reg a,b;  
always @(posedge clk ) 
	begin a <= clk_k;
			b = a; 
	end 
wire key_posedge = (~b&a)?1'b1:1'b0;
always @(posedge clk)
	begin 
		if(clr)
			begin   
				cout<= 0;
				sum <= 0;  
			end  
		else if(key_posedge&ena)  
			begin  
				if(sum < 4'd9)  
					begin    
						sum <= sum+1'b1;    
						cout<= 0;   
					end   
				else   
					begin    
						cout<= 1;    
						sum <= 0;   
					end  
				end  
		else  
			begin   
				cout<= cout;   
				sum <= sum;  
			end 
		end 
endmodule

测试程序

module t5;

	// Inputs
	reg clk_k;
	reg clk;
	reg clr;
	reg ena;

	// Outputs
	wire [3:0] sum;
	wire cout;

	// Instantiate the Unit Under Test (UUT)
	cnt10 uut (
		.clk_k(clk_k), 
		.clk(clk), 
		.clr(clr), 
		.ena(ena), 
		.sum(sum), 
		.cout(cout)
	);

	initial begin
		// Initialize Inputs
		clk_k = 0;
		clk = 0;
		clr = 0;
		ena = 0;

		// Wait 100 ns for global reset to finish
		forever#10 clk = ~clk; 
        
		// Add stimulus here

	end
	initial begin     
		forever#20 clk_k = ~clk_k;  
   end  
	initial begin     
		#30 begin clr = 1;
				ena= 0;
			end   
		#30 begin clr = 1;
				ena = 1;
			end   
		#30 begin clr = 0;
				ena = 1;
			end   
	end
      
endmodule

实验13:4位可逆计数器设计

module counter(clk,clr,s,en,updn,data_out);
	input clk,clr,s,en,updn;
	output [3:0] data_out;
	reg [3:0] data_out;
	always @ (posedge clk )
		if(clr) begin
			data_out<=0;
		end
		else
			if(s) begin
				data_out<=1;
			end
		else
			if(en) begin
				if(updn) begin
					if(data_out==15)
						data_out<=0;
					else
						data_out<=data_out+1;
					end
				else begin
					if(data_out==0)
						data_out<=15;
					else
						data_out<=data_out-1;
					end
				end
			else
				data_out<=data_out;
endmodule

测试程序

module tt14;

	// Inputs
	reg clk;
	reg clr;
	reg s;
	reg en;
	reg updn;

	// Outputs
	wire [3:0] data_out;

	// Instantiate the Unit Under Test (UUT)
	counter uut (
		.clk(clk), 
		.clr(clr), 
		.s(s), 
		.en(en), 
		.updn(updn), 
		.data_out(data_out)
	);

	initial begin
		// Initialize Inputs
		clk = 0;
		clr = 1;
		s = 0;
		en = 0;
		updn = 0;
		#10 clr=1;
		#10 en=1;
		#15 clr=0;
		#100 updn=1;
	end
	always begin 
		#2 clk = ~clk; 
	end
      
endmodule

实验14:基本寄存器设计

module shift4(clr,clk,DOUT,D); 
	input clr ; 
	wire clr ; 
	input clk ; 
	wire clk ; 
	input [3:0] D ; 
	wire [3:0] D ; 
	output [3:0] DOUT ; 
	reg [3:0] DOUT ; 
	always @ ( posedge clk or posedge clr) 
	begin 
	　　if (clr==1) DOUT <= 0; 
	　　else DOUT <= D ; 
	end 
endmodule

测试代码

module tt1;
	// Inputs
	reg load;
	reg clr;
	reg clk;
	reg [3:0] d;

	// Outputs
	wire [3:0] q;

	// Instantiate the Unit Under Test (UUT)
	register uut (
		.load(load), 
		.clr(clr), 
		.clk(clk), 
		.d(d), 
		.q(q)
	);

	initial begin
		// Initialize Inputs
		load = 0;
		clr = 0;
		clk = 0;
		d = 4'b0001;
	end
	always begin 
		#3 clk = ~clk; 
		#5 d = d + 4'b0001; 
	end
      
endmodule

实验15:4位移位寄存器设计

module ShiftRegister(q3,data_in,clk,clr);

output[3:0] q3;
input[3:0] data_in;
input clk;
input clr;
reg[3:0] q3,q2,q1,q0;
always@(posedge clk or posedge clr)
    if (clr == 1)
         begin
              q3 <= 0;
                q2 <= 0;
                q1 <= 0;
                q0 <= 0;
          end
     else
        begin 
          q3<=q2;
          q2<=q1;
          q1<=q0;
          q0<=data_in;
        end
endmodule

测试程序

module test1;

	// Inputs
    reg [3:0] data_in;
    reg clk;
    reg clr;

    // Outputs
    wire [3:0] q3;

    // Instantiate the Unit Under Test (UUT)
    ShiftRegister uut (
        .q3(q3), 
        .data_in(data_in), 
        .clk(clk), 
        .clr(clr)
    );

   initial begin
        // Initialize Inputs
        data_in = 4'b0001;
        #1 clr = 1'b0;
        #1 clk=1'b1;
   end
	always begin
    #3 clk = ~clk;
    #5 data_in = data_in + 4'b0001;
   end
      
endmodule

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