You can use this to build a stopwatch on a nexys 3 board in VHDL.

chronometer\BCD7segmDec.vhd
...........\BCD7segmDec_stx_beh.prj
...........\chro.ucf
...........\chronometer.bgn
...........\chronometer.bit
...........\Chronometer.bld
...........\Chronometer.cmd_log
...........\chronometer.drc
...........\chronometer.gise
...........\Chronometer.lso
...........\Chronometer.ncd
...........\Chronometer.ngc
...........\Chronometer.ngd
...........\Chronometer.ngr
...........\Chronometer.pad
...........\Chronometer.par
...........\Chronometer.pcf
...........\Chronometer.prj
...........\Chronometer.ptwx
...........\Chronometer.stx
...........\Chronometer.syr
...........\Chronometer.twr
...........\Chronometer.twx
...........\Chronometer.unroutes
...........\Chronometer.ut
...........\Chronometer.vhd
...........\chronometer.xise
...........\Chronometer.xpi
...........\Chronometer.xst
...........\Chronometer_beh.prj
...........\Chronometer_bitgen.xwbt
...........\Chronometer_envsettings.html
...........\Chronometer_guide.ncd
...........\Chronometer_map.map
...........\Chronometer_map.mrp
...........\Chronometer_map.ncd
...........\Chronometer_map.ngm
...........\Chronometer_map.xrpt
...........\Chronometer_ngdbuild.xrpt
...........\Chronometer_pad.csv
...........\Chronometer_pad.txt
...........\Chronometer_par.xrpt
...........\Chronometer_stx_beh.prj
...........\Chronometer_summary.html
...........\Chronometer_summary.xml
...........\chronometer_tb.vhd
...........\chronometer_tb_isim_beh.exe
...........\chronometer_tb_isim_beh.wdb
...........\chronometer_tb_stx_beh.prj
...........\Chronometer_usage.xml
...........\Chronometer_xst.xrpt
...........\chrono_ucf.ucf
...........\Control.vhd
...........\Control_stx_beh.prj
...........\deler.vhd
...........\deler2.vhd
...........\deler_summary.html
...........\fuse.log
...........\fuse.xmsgs
...........\fuseRelaunch.cmd
...........\iseconfig\chronometer.projectmgr
...........\.........\Chronometer.xreport
...........\.........\deler.xreport
...........\.........\T6.xreport
...........\..im\chronometer_tb_isim_beh.exe.sim\chronometer_tb_isim_beh.exe
...........\....\...............................\isimcrash.log
...........\....\...............................\ISimEngine-DesignHierarchy.dbg
...........\....\...............................\isimkernel.log
...........\....\...............................\libPortability.dll
...........\....\...............................\netId.dat
...........\....\...............................\tmp_save\_1
...........\....\...............................\work\a_0424875824_3212880686.c
...........\....\...............................\....\a_0424875824_3212880686.didat
...........\....\...............................\....\a_0424875824_3212880686.nt64.obj
...........\....\...............................\....\a_0533247049_3212880686.c
...........\....\...............................\....\a_0533247049_3212880686.didat
...........\....\...............................\....\a_0533247049_3212880686.nt64.obj
...........\....\...............................\....\a_0878096478_3212880686.c
...........\....\...............................\....\a_0878096478_3212880686.didat
...........\....\...............................\....\a_0878096478_3212880686.nt64.obj
...........\....\...............................\....\a_0893791676_2372691052.c
...........\....\...............................\....\a_0893791676_2372691052.didat
...........\....\...............................\....\a_0893791676_2372691052.nt64.obj
...........\....\...............................\....\a_1022465959_3212880686.c
...........\....\...............................\....\a_1022465959_3212880686.didat
...........\....\...............................\....\a_1022465959_3212880686.nt64.obj
...........\....\...............................\....\a_1081563116_3212880686.c
...........\....\...............................\....\a_1081563116_3212880686.didat
...........\....\...............................\....\a_1081563116_3212880686.nt64.obj
...........\....\...............................\....\a_1443467215_3212880686.c
...........\....\...............................\....\a_1

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