!!!!!!!!请各位帮我看看 647

nut99

请各位帮我看看，为什么说<frame_over>和<word_over>没有使用呢？
word_over和frame_over位wire型 输入值
WARNING:Xst:647 - Input <frame_over> is never used.
WARNING:Xst:647 - Input <word_over> is never used.

case (cs)
......
     f_w_over   :  begin                           //8
                    if(word_over==1)
       begin
                      ns=w_1fifo_go;
        word_ready=0;
        end
                    else
                      ns=f_w_over;                               
                    end                   
.......
      w_just_next:  begin                           //15
                    if(frame_over==1'b1)
                      ns=idle;
                    else
                      ns=w_1fifo_go;                               
                    end                            
      default:      ns=idle;                                 

.....
endcase

[此贴子已经被作者于2007-4-2 14:18:58编辑过]