题解 | #简易秒表#

需要一个标志位，控制分钟60之后，秒表不增加

`timescale 1ns/1ns

module count_module(
	input clk,
	input rst_n,

    output reg [5:0]second,
    output reg [5:0]minute
	);
	
	reg flag;

	always @(posedge clk or negedge rst_n) begin
		if(!rst_n)
			begin
				minute <= 6'd0;
				second <= 6'd0;
				flag <= 1'd0;
			end
		else if (second == 6'd60)
			begin
				minute <= minute + 1'd1;
				second <= 6'd1;
				flag <= flag;
			end
		else if (minute == 6'd60)
			begin
				second <= 6'd0;
				flag <= 1'd1;
			end
		else if(!flag) begin
			second <= second + 6'd1;
			minute <= minute;
		end
	end
	
	
endmodule