t_led.v

用硬件描述语言编写的关于LED的驱动显示程序。

module T_LED(clk,out_LED7_NS,out_LED7_WE,out_LED3_NS,out_LED3_WE,clk_1S,Time_10,Time_1,Time_Y,in_NS,in_WE);
input clk;
input[2:0] in_NS,in_WE;
wire clk_1S;
output[3:0] Time_10,Time_1;
output Time_Y;
output Clk_1S;
output[13:0] out_LED7_NS,out_LED7_WE;
reg[13:0] out_LED7_NS,out_LED7_WE;
output[2:0] out_LED3_NS,out_LED3_WE;
reg[2:0] out_LED3_NS,out_LED3_WE;

reg[7:0] TIME;
clkToclk_1S
	Second(.clk(clk),.clk_1S(clk_1S));
reg[3:0] Time_10,Time_1;
reg[2:0] Time_Y;
reg[1:0] Stage;
always@(posedge clk_1S)begin
	case(Stage)
		2'b00:begin//NS pass
			if((Time_10==0)&(Time_1==0))begin
				Stage<=2'b11;
				Time_Y<=3'd3;
			end
			else begin
				if(Time_1==0)begin
					Time_1<=4'd9;
					Time_10<=Time_10-1;
				end
				else begin
					Time_1<=Time_1-1;
				end
			end
			out_LED7_NS<={out_LED7_NUM(Time_10),out_LED7_NUM(Time_1)};
			out_LED7_WE<={out_LED7_NUM(Time_10),out_LED7_NUM(Time_1)};
			out_LED3_NS<=3'b001;
			out_LED3_WE<=3'b100;
		end
		2'b01:begin//WE pass
			if((Time_10==0)&(Time_1==0))begin
				Stage<=2'b10;
				Time_Y<=3'd3;
			end
			else begin
				if(Time_1==0)begin
					Time_1<=4'd9;
					Time_10<=Time_10-1;
				end
				else begin
					Time_1<=Time_1-1;
				end
			end
			out_LED7_WE<={out_LED7_NUM(Time_10),out_LED7_NUM(Time_1)};
			out_LED7_NS<={out_LED7_NUM(Time_10),out_LED7_NUM(Time_1)};
			out_LED3_WE<=3'b001;
			out_LED3_NS<=3'b100;
		end
		2'b10:begin//Yellow to NS pass
			if(Time_Y==0)begin
				Stage<=2'b00;
				Time_10={1'b0,in_NS}+4'd1;
				Time_1=4'd0;
			end
			else begin
				Time_Y<=Time_Y-1;
			end
			out_LED7_WE<={out_LED7_NUM(4'd0),out_LED7_NUM(Time_Y)};
			out_LED7_NS<={out_LED7_NUM(4'd0),out_LED7_NUM(Time_Y)};
			out_LED3_WE<=3'b010;
			out_LED3_NS<=3'b010;
		end
		2'b11:begin//Yellow to WE pass
			if(Time_Y==0)begin
				Stage<=2'b01;
				Time_10={1'b0,in_WE}+4'd1;
				Time_1=4'd0;
			end
			else begin
				Time_Y<=Time_Y-1;
			end
			out_LED7_NS<={out_LED7_NUM(4'd0),out_LED7_NUM(Time_Y)};
			out_LED7_WE<={out_LED7_NUM(4'd0),out_LED7_NUM(Time_Y)};
			out_LED3_NS<=3'b010;
			out_LED3_WE<=3'b01;
		end
		default:begin
			Stage<=2'b00;
			Time_10=4'd2;
			Time_1=4'd0;
		end
	endcase
end

function[6:0]out_LED7_NUM;
	input[3:0] in_NUM;
	
	begin
		case(in_NUM)
			4'd00:out_LED7_NUM=7'b111_1110;
			4'd01:out_LED7_NUM=7'b011_0000;
			4'd02:out_LED7_NUM=7'b110_1101;
			4'd03:out_LED7_NUM=7'b111_1001;
			4'd04:out_LED7_NUM=7'b011_0011;
			4'd05:out_LED7_NUM=7'b101_1011;
			4'd06:out_LED7_NUM=7'b101_1111;
			4'd07:out_LED7_NUM=7'b111_0000;
			4'd08:out_LED7_NUM=7'b111_1111;
			4'd09:out_LED7_NUM=7'b111_0011;
			default:out_LED7_NUM=7'b111_1111;			
		endcase
	end
endfucntion
endmodule