Verilog 中总是跟在 #(...) 磅后面的是什么意思? [英] What is always followed by #(...) pound mean in Verilog?

问题描述

在一个简单的时钟发生器示例中，我看到以下代码:

In a simple clock generator example, I see the following code:

always #(cycle/2) clk ~= clk;

我以前总是看到@(*) 但没有看到英镑(#).我试图在文档中找到它，但我只能找到一些对实值端口"的引用，没有进一步详细说明.

I've seen always @(*) before but not pound (#). I tried to find it in the documentation, but all I could find was some reference to "real-valued ports" with no further elaboration.

推荐答案

这是一个延迟操作.它基本上只是读取

It's a delay operation. It essentially just reads

always begin
   #(cycle/2) //wait for cycle/2 time
   clk ~= clk;
end

有时您可能会看到它与原始值一起使用，例如 #5 或 #10，这意味着等待 5 或 10 个单位的时间刻度.

You might sometimes see this used with raw values, like #5 or #10, which means to wait 5 or 10 units of your timescale.

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