Question

每隔一段时间来一组方波 verilog语言实现

大概波形如下图，方波的时间周期随意，可以自拟
感谢杜仲杜仲杜仲，方正结果是对的！上图

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Answer 1

module fangbo(
input rst,
input clk,
output reg wave)
reg [7:0] counter;
always(posedge clk)
begin

if(rst)

begin
count <= 0;
wave <= 0;
end
else if(count == 20)
begin
count <= 0;
wave <= 0;
end
else if(count <= 8)
begin
count <=count +1；
wave <= count[0];
end
else if(count < 20)
begin
count <=count +1；
wave <= 0;
end
end
endmodule

Answer 2

用状态机写，清晰，简单。