【FPGA】数字交通灯设计-Tools

module Freq_divider
#(parameter N = 27)
(
input clk,
input rst,
output [N-1:0]freq_div,
output count
);
reg [N-1:0]regN = 0;
always@(posedge clk)
begin
    if(rst)
        regN <= 0;
    else
        regN <= regN+1;
end
assign freq_div = regN;
assign count = (regN == 2**N-1)?1'b1:1'b0;
endmodule

module Digital_decode
(
input clk,
input [3:0]data,
output [7:0]Trans_num
);

reg [7:0]reg_Trans_num = 0;

always@(posedge clk)
begin
   case(data)
       4'd0: reg_Trans_num <= 8'b0000_0011;
       4'd1: reg_Trans_num <= 8'b1001_1111;
       4'd2: reg_Trans_num <= 8'b0010_0101;
       4'd3: reg_Trans_num <= 8'b0000_1101;
       4'd4: reg_Trans_num <= 8'b1001_1001;
       4'd5: reg_Trans_num <= 8'b0100_1001;
       4'd6: reg_Trans_num <= 8'b0100_0001;
       4'd7: reg_Trans_num <= 8'b0001_1111;
       4'd8: reg_Trans_num <= 8'b0000_0001;
       4'd9: reg_Trans_num <= 8'b0000_1001;
       default: reg_Trans_num <= 8'b0001_0001;
   endcase
end
assign Trans_num = reg_Trans_num;
endmodule