也许以后的更新速度越来越慢了；曾经的一个面试刺激了我，我说我曾经做过
***工具，这工具在网上广为流传，也确实还能用用，可那个x人，这东西要做吗？
网上多得是，我顿时无语！他一直认为是做工程，因为这工具对做工程，帮助很大，
解析了半天，没用，真是“有眼无珠“啊。有时想想也是，这是不是浪费时间了
或者是####@!$%,哎，------------------------------


嵌入式开发Dnp

. 通道、设备配置成固定  ？不能variable  or function ??
. Tx时间可配置
.  Link confirm ( link_comfirm_never , link_comfirm_sometimes,link_comfirm_always )
   somtimes confirm means  only on mutiframe fragments .
.  link_comfirm_timeout
.  link_max_retries
.  brm  ( build request message )
.  cold restart  delay
.  warm restart delay
.  application layer respond messages  RESP_FRAMENT_SIZE 2048
.  REQ_FRAGMENT_SIZE 2048
.  NEED_TIME_INTERVAL need time IIN bit ( 用来要求主站对时)
.  if  the device will not support  report by exception or this is no reason the device
   synchronized with the master ( 没有带时间的邮标数据 )  
.  the number of  binary  input change events that can be saved (queued) between event reports.
   the number may be less than the number of static points ( 01 points ), on the other  hand
   可能一点产生多个事件。may be a single point to generate multiple events
.  analog input  change events buffer size
.  min number of event  in each class to generate an 主动上报( 包含class1 class 2 class 3 )
.  unsolicited reponses: fuction code 0x14 0x15
.  unsolicited reponse : 0  最小累计 如上点 1: 产生立即发送 send event immediately when they occur
                                     >=2  send events after either  this amount of time has accumulated or 如 0值