$random的一个小问题

1. always@(posedge clk)
   
2. begin
   
3.         a = {$random}%2;
   
4.         b = {$random}%2;
   
5.         idataa = {idataa[6:0],a};
   
6.         idatab = {idatab[6:0],b};
   
7. end

1. always@(posedge clk)
   
2. begin
   
3.         idataa = {idataa[6:0],{$random}%2};
   
4.         //idatab = {idatab[6:0],{$random}%2};
   
5. end

使用非阻塞赋值符<=