流水灯基于Verilog语言实现及测试代码4页.docx

流水灯实验的Testbench报告一、 设计源码（顺序方法）module led(input clk,input rstn,output reg3:0led);parameter T1s = 4d10;reg3:0cnt_1s;always(posedge clk or negedge rstn)if(!rstn)begincnt_1s = 0;endelse if(cnt_1s = T1s)begincnt_1s = 0;endelse begincnt_1s = cnt_1s + 1b1;endalways(posedge clk or negedge rstn)if(!rstn)beginled = 4hf;endelse if(led = 4hf) beginled = 4he;endelse if(cnt_1s =