chen2.txt

是电子手表的程序

module ddd(clk,rst,dout,ce,outd);
    input clk;
    input rst;
    output [6:0]dout;
    output [3:0]ce;
    output outd;
    reg[6:0]dout;
    reg[3:0]led1;
    reg[3:0]led2;
    reg[3:0]led3;
    reg[3:0]led4;
    reg[25:0]c;
    reg[24:0]c1;
    reg[3:0]ce;
    reg dian;
    reg outd;
    always@(posedge clk)
    begin
    if(!rst)begin
    led1<=0;
    led2<=0;
    led3<=0;
    led4<=0;
    c<=0;
    dian<=0;
    end
    else  if(c<5000_0000)c<=c+1;
    else begin
	      dian<=~dian;
         c<=0;
          if(led3==5&&led4==9)
         begin
             led3<=0;
             led4<=0;
             if(led2<9)led2<=led2+1;
             else if(led1==5&&led2==9)begin
             led1<=0;
             led2<=0;  
             end
             else begin 
             led2<=0;
             led1<=led1+1;
             end
             end
         else begin 
             if(led4<9)led4<=led4+1;
             else begin
             led4<=0;
             led3<=led3+1;
             end
             end
		   end
		   end
    always@(posedge clk)
    begin if(!rst)begin
    dout<=0;
    c1<=0;
    ce<=4'b1011; outd<=0;
    end
    else if(ce==4'b1011)
    begin
    
    if(c1<10_0000)c1<=c1+1;

    else 
    begin	
	  ce<=4'b1101;	   outd<=0;
     c1<=0;
    case(led3)
    0:dout<=7'b011_1111;
    1:dout<=7'b000_0110;
    2:dout<=7'b101_1011;
    3:dout<=7'b100_1111;
    4:dout<=7'b110_0110;
    5:dout<=7'b110_1101;
    default:dout<=7'b000_1111;
    endcase
    end
    end
    else if(ce==4'b1101)
    begin	
    if(c1<10_0000)c1<=c1+1;
    else 
    begin
	   ce<=4'b1110; outd<=0;	 

    	c1<=0;
    case(led4)
    0:dout<=7'b011_1111;
    1:dout<=7'b000_0110;
    2:dout<=7'b101_1011;
    3:dout<=7'b100_1111;
    4:dout<=7'b110_0110;
    5:dout<=7'b110_1101;
    6:dout<=7'b111_1101;
    7:dout<=7'b000_0111;
    8:dout<=7'b111_1111;
    9:dout<=7'b110_1111;
    default:dout<=7'b000_0000;
    endcase
    end
    end
	else if(ce==4'b1110) 
    begin
    
    if(c1<10_0000)c1<=c1+1;

    else 
    begin	
	  ce<=4'b0111;	outd<=0;
     c1<=0;
    case(led1)
    0:dout<=7'b011_1111;
    1:dout<=7'b000_0110;
    2:dout<=7'b101_1011;
    3:dout<=7'b100_1111;
    4:dout<=7'b110_0110;
    5:dout<=7'b110_1101;
    default:dout<=7'b000_0000;
    endcase
    end
    end
    else if(ce==4'b0111)
    begin	
    if(c1<10_0000)c1<=c1+1;
    else 
    begin
	   ce<=4'b1011;
         outd<=dian;
    	c1<=0;
    case(led2)
    0:dout<=7'b011_1111;
    1:dout<=7'b000_0110;
    2:dout<=7'b101_1011;
    3:dout<=7'b100_1111;
    4:dout<=7'b110_0110;
    5:dout<=7'b110_1101;
    6:dout<=7'b111_1101;
    7:dout<=7'b000_0111;
    8:dout<=7'b111_1111;
    9:dout<=7'b110_1111;
    default:dout<=7'b000_11110;
    endcase
    end
    end
    else ce<=ce;
    end
   
    endmodule