setPreference -pref AutoSignature:FALSE
setPreference -pref KeepSVF:FALSE
setPreference -pref ConcurrentMode:FALSE
setPreference -pref UseHighz:FALSE
setPreference -pref svfUseTime:FALSE
setMode -bs
setMode -bs
setCable -port auto
Identify 
identifyMPM 
assignFile -p 1 -file "E:/Xilinx/PS2_prj2/ps2.bit"
Program -p 1 -defaultVersion 0