verilog behavioral modeling ---Block statements

block statements :

1. sequential block  : begin-end block

2.parallel block       :  fork - join block

block name :

如果block有自己的label，

1.可以disable 此block.

2.可以穿层次应用 block中的变量。

变量都是静态存储。

ＰＳ：  when an assignement is to be made after two separate events have occured,known as the joining of events,a fork-join block can be useful.(此种方式，可以实现事件Aevent/Bevent的与操作)

begin

fork

@Aevent;

@Bevent;

join

areg = breg;

end

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STRUCTURED PROCEDURES

All procedures in the verilog HDL are specified within one of the following four statements

-------initial construct

--------always construct

---------task

----------function