端口打开和关闭do while

 ;Author : Bing Song
 ;Date   : //
 ;Usage: modify “logfile" according to actual drictory

 getdir logdir #获取当前路径
 changedir logdir #切换到当前目录下
 logfile="test.log"
 logopen logfile
 logwrite "*****************************************Start  log******************************"##
     timeout =3 #设置超时时间，超过3秒就执行下面的脚本
     wait "buildroot login: "
     sendln "root"
     wait "#"
     pause
     sendln ""
     pause
     wait "#"
     sendln 'cd sdk/'
     wait "#"
     sendln "cd R1165-J0003-01_V2.1.5_Shenzhou_SDK"
     wait "#"
     sendln './auto_load_user.sh -m PAM4_400G_32'
     pause
     wait "BCM.0>"
     num=
     do while -num >0 #循环执行端口cd0~cd31
         int2str var num #转换int型变量为str型，并存储到变量var
         sendln "port cd" var " " "en=off" #""表示空格
         pause
         wait "BCM.0>"
         pause
         sendln "ps"
         pause
         sendln "port cd" var " " "en=on"
         pause
         wait "BCM.0>"
         pause
         sendln "ps"
         num=num+
     loop
     sendln "exit"
 logclose
 logwrite "Log End"##
 logwrite "**************************************End*******************************************"##