cout6.v

用verilog实现的四乘四键盘程序,在Quartus II上编译通过并成功

module cout6(out,clk,rst);
output[2:0] out;
input clk,rst;
reg[2:0] out;

always @(posedge clk )
  begin
  if (rst==0) out[2:0]<=3'b000;
      else  
	        begin   if(out[2:0]==3'b101)    out[2:0]<=3'b000;
				    else                         out[2:0]<=out[2:0]+1;	
            end		
  end        
endmodule