fpga阻塞赋值和非阻塞赋值

阻塞赋值:      用了= 号

非阻塞赋值:     用了<= 号

假设初始化为a = 1, b = 2

阻塞赋值: 

// 初始化a = 1, b = 2
[email protected](posedge clk)

begin

       b = a;

       c = b;

end

//运行后c = b = 1

非阻塞赋值:

// 初始化a = 1, b = 2
[email protected](posedge clk)

begin

       b <= a;
       c <= b;

end

//运行后b = 1, c = 2
 

建议：

在 assign 中用 = 号

在 always 中用 <= 号