数码管从1到十流水显示

module shuma(rst,clk,out,seg,b);

input rst;

input clk;

output seg,b;

output [7:0]out;

wire b;

wire [3:0] data;

divi a1(clk,rst,b);

counter a3(b,rst,data);

display a2(data,out,seg);

endmodule

module divi(clk,rst,newclk);

input clk;

input rst;

output newclk;

reg newclk;

reg [24:0] count;

always@(posedge clk)

begin

if(!rst)

begin

count<=0;

newclk<=0;

end

else

begin

count<=count+1;

if(count==25000000)

begin

newclk<=~newclk;

count<=0;

end

end

end

endmodule

module counter(clk,rst,out);

input rst;

input clk;

output [3:0]out;

reg [3:0] out;

always@(posedge clk)

begin if(!rst) out<=0;

else begin

out<=out+1;

if(out==10) out<=0;

end

end

endmodule

module display(in,out,seg);

input [3:0] in;

output [6:0] out;

output seg;

reg [7:0] out;

always@(in)

begin

case(in)

0:out=8'b0000_0011;

1:out=8'b1001_1111;

2:out=8'b0010_0101;

3:out=8'b0000_1101;

4:out=8'b1001_1001;

5:out=8'b0100_1001;

6:out=8'b0100_0001;

7:out=8'b0001_1011;

8:out=8'b0000_0001;

9:out=8'b0000_1001;

default:out=0;

endcase

end

assign seg=0;

endmodule

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