//Error（10028）：Can't resolve multiple constant drivers for net “ ” at **.v

//两个进程里都有同一个条件判断的话，会产生并行信号冲突的问题。

 1 module test(c1,c2,out1,out2);

 input c1,c2;

 output out1,out2;

 reg out1,out2;

 always @(posedge c1)

     begin

         out1<=;

         out2<=;

     end

 always@(posedge c2)

     begin

         out1<=;

         out2<=;

     end

 endmodule                    

 module shiyan(c1,c2,out1,out2);

 input c1,c2;

 output out1,out2;

 reg out1,out2;

 always @(posedge c1 or posedge c2)

     if(c1==)

         begin

             out1<=;

             out2<=;

         end

    else

         begin

             out1<=;

             out2<=;

         end

 endmodule

摘自网络：

http://blog.sina.com.cn/s/blog_5c5263cf0100qd2q.html