module myledwater(reset,clk,led);
input reset;
input clk;
output [7:0] led;
reg [7:0] led;
reg [26:0] count=0;
always @(clk)
begin
count=count+1;
end
always @(clk)
if(!reset)
begin
case(count[26:24])
0:led<=8'b00000001; 1:led<=8'b00000010; 2:led<=8'b00000100; 3:led<=8'b00001000; 4:led<=8'b00010000; 5:led<=8'b00100000; 6:led<=8'b01000000; 7:led<=8'b10000000;
endcase
endendmodule
想实现一个LED灯的控制程序;但是出现如下错误:The signal > is incomplete. The signal is not driven by any source pin in the design. (当然count2,3.。。。26)都是报错的,这是肿么回事