基于ISE的verilog代码以控制led

此程序用于LED跑马灯，是面向于Core3s250e的XILINX的程序，采用ISE 14.6编写，可以直接下载到3s250e中，经过下载可用。对于verilog初学者非常有益，希望可以共同学习。

LED
_ngo
_xmsgs
fuse.log
fuse.xmsgs
fuseRelaunch.cmd
ipcore_dir
iseconfig
isim
led4.bgn
led4.bit
LED4.bld
LED4.cfi
LED4.cmd_log
led4.drc
LED4.gise
LED4.lso
LED4.mcs
LED4.ncd
LED4.ngc
LED4.ngd
LED4.ngr
LED4.pad
LED4.par
LED4.pcf
LED4.prj
LED4.prm
LED4.ptwx
LED4.sig
LED4.stx
LED4.syr
LED4.twr
LED4.twx
LED4.ucf
LED4.unroutes
LED4.ut
LED4.v
LED4.xise
LED4.xpi
LED4.xst
LED4_beh.prj
LED4_bitgen.xwbt
LED4_envsettings.html
LED4_guide.ncd
LED4_ise12migration.zip
LED4_map.map
LED4_map.mrp
LED4_map.ncd
LED4_map.ngm
LED4_map.xrpt
LED4_ngdbuild.xrpt
LED4_pad.csv
LED4_pad.txt
LED4_par.xrpt
LED4_summary.html
LED4_summary.xml
LED4_usage.xml
LED4_xst.xrpt
LED41.v
LED42.v
LLED.cfi
LLED.mcs
LLED.prm
LLED.sig
output.txt
pa.fromNetlist.tcl
planAhead.ngc2edif.log
planAhead_run_1
planAhead_run_2
planAhead_run_3
templates
usage_statistics_webtalk.html
webtalk.log
webtalk_pn.xml
xilinxsim.ini
xlnx_auto_0_xdb
xst
_ngo
netlist.lst