vhdl code for up down counter




File list:
up_down_cntr
...........\isim
...........\....\isim.tmp_save
...........\....\.............\_1
...........\....\temp
...........\....\....\counter.vdb
...........\....\....\counter_comp.vdb
...........\....\....\tb_count.vdb
...........\....\work
...........\....\....\counter.vdb
...........\....\....\counter_comp.vdb
...........\....\....\tb_count.vdb
...........\....\_tmp
...........\....\....\ieee
...........\....\....\....\p_0017514958.didat
...........\....\....\....\p_0774719531.didat
...........\....\....\....\p_1242562249.didat
...........\....\....\....\p_1367372525.didat
...........\....\....\....\p_2592010699.didat
...........\....\....\....\p_2717149903.didat
...........\....\....\....\p_3039841270.didat
...........\....\....\....\p_3499444699.didat
...........\....\....\....\p_3564397177.didat
...........\....\....\....\p_3620187407.didat
...........\....\....\....\p_3972351953.didat
...........\....\....\....\p_4165608084.didat
...........\....\....\std
...........\....\....\...\textio.didat
...........\....\....\work
...........\....\....\....\a_1211396465_3212880686.c
...........\....\....\....\a_1211396465_3212880686.didat
...........\....\....\....\a_1211396465_3212880686.nt.obj
...........\....\....\....\a_1509281870_2372691052.c
...........\....\....\....\a_1509281870_2372691052.didat
...........\....\....\....\a_1509281870_2372691052.nt.obj
...........\....\....\....\a_4240282860_3212880686.c
...........\....\....\....\a_4240282860_3212880686.didat
...........\....\....\....\a_4240282860_3212880686.nt.obj
...........\....\....\....\tb_count_isim_beh.exe_lib.c
...........\....\....\....\tb_count_isim_beh.exe_lib.nt.dll
...........\....\....\....\tb_count_isim_beh.exe_lib.nt.obj
...........\....\....\....\tb_count_isim_beh.exe_main.c
...........\....\isimcrash.log
...........\....\simulate_dofile.log
...........\....\simulate_dofile.log_back
...........\up_down_cntr_xdb
...........\................\tmp
...........\................\...\ise
...........\................\...\...\__OBJSTORE__
...........\................\...\...\............\Autonym
...........\................\...\...\............\common
...........\................\...\...\............\HierarchicalDesign
...........\................\...\...\............\..................\HDProject
...........\................\...\...\............\..................\.........\HDProject
...........\................\...\...\............\..................\.........\HDProject_StrTbl
...........\................\...\...\............\..................\__stored_object_table__
...........\................\...\...\............\ISimPlugin
...........\................\...\...\............\..........\SignalOrdering1
...........\................\...\...\............\..........\...............\tb_count_isim_beh.exe
...........\................\...\...\............\..........\...............\tb_count_isim_beh.exe_StrTbl
...........\................\...\...\............\PnAutoRun
...........\................\...\...\............\.........\Scripts
...........\................\...\...\............\.........\.......\RunOnce_tcl
...........\................\...\...\............\.........\.......\RunOnce_tcl_StrTbl
...........\................\...\...\............\ProjectNavigator
...........\................\...\...\............\................\dpm_project_main
...........\................\...\...\............\................\................\dpm_project_main
...........\................\...\...\............\................\................\dpm_project_main_StrTbl
...........\................\...\...\............\................\................\NameMap
...........\................\...\...\............\................\................\NameMap_StrTbl
...........\................\...\...\............\................\__stored_objects__
...........\................\...\...\............\................\__stored_objects___StrTbl
...........\................\...\...\............\................\__stored_object_table__
...........\................\...\...\............\ProjectNavigatorGui
...........\................\...\...\............\...................\GuiProjectData
...........\................\...\...\............\...................\GuiProjectData_StrTbl
...........\................\...\...\............\SrcCtrl
...........\................\...\...\............\.......\SavedOptions
...........\................\...\...\............\STE
...........\................\...\...\............\WebTalk
...........\................\...\...\............\xreport
...........\................\...\...\............\.......\Gc_RvReportViewer-Current-Module
...........\................\...\...\............\.......\Gc_RvReportViewer-Current-Module_StrTbl
...........\................\...\...\............\.......\Gc_RvReportViewer-Module-Data-counter
...........\................\...\...\............\.......\Gc_RvReportViewer-Module-Data-counter_StrTbl
...........\................\...\...\............\.......\Gc_RvReportViewer-Module-DataFactory-Default
...........\................\...\...\............\.......\Gc_RvReportViewer-Module-DataFactory-Default_StrTbl
...........\................\...\...\............\_ProjRepoInternal_
...........\................\...\...\__REGISTRY__
...........\................\...\...\............\Autonym
...........\................\...\...\............\.......\regkeys
...........\................\...\...\............\bitgen
...........\................\...\...\............\......\regkeys
...........\................\...\...\............\common
...........\................\...\...\............\......\regkeys
...........\................\...\...\............\cpldfit
...........\................\...\...\............\.......\regkeys
...........\................\...\...\............\Cs
...........\................\...\...\............\..\regkeys
...........\................\...\...\............\dumpngdio
...........\................\...\...\............\.........\regkeys
...........\................\...\...\............\fuse
...........\................\...\...\............\....\regkeys
...........\................\...\...\............\HierarchicalDesign
...........\................\...\...\............\..................\HDProject
...........\................\...\...\............\..................\.........\regkeys
...........\................\...\...\............\..................\regkeys
...........\................\...\...\............\hprep6
...........\................\...\...\............\......\regkeys
...........\................\...\...\............\idem
...........\................\...\...\............\....\regkeys
...........\................\...\...\............\ISimPlugin
...........\................\...\...\............\..........\regkeys
...........\................\...\...\............\map
...........\................\...\...\............\...\regkeys
...........\................\...\...\............\netgen
...........\................\...\...\............\......\regkeys
...........\................\...\...\............\ngc2edif
...........\................\...\...\............\........\regkeys
...........\................\...\...\............\ngcbuild
...........\................\...\...\............\........\regkeys
...........\................\...\...\............\ngdbuild
...........\................\...\...\............\........\regkeys
...........\................\...\...\............\par
...........\................\...\...\............\...\regkeys
...........\................\...\...\............\ProjectNavigator
...........\................\...\...\............\................\regkeys
...........\................\...\...\............\ProjectNavigatorGui
...........\................\...\...\............\...................\regkeys
...........\................\...\...\............\runner
...........\................\...\...\............\......\regkeys
...........\................\...\...\............\SrcCtrl
...........\................\...\...\............\.......\regkeys
...........\................\...\...\............\STE
...........\................\...\...\............\...\bitgen
...........\................\...\...\............\...\......\regkeys
...........\................\...\...\............\...\map
...........\................\...\...\............\...\...\regkeys
...........\................\...\...\............\...\ngdbuild
...........\................\...\...\............\...\........\regkeys
...........\................\...\...\............\...\par
...........\................\...\...\............\...\...\regkeys
...........\................\...\...\............\...\trce
...........\................\...\...\............\...\....\regkeys
...........\................\...\...\............\...\xst
...........\................\...\...\............\...\...\regkeys
...........\................\...\...\............\...\regkeys
...........\................\...\...\............\taengine
...........\................\...\...\............\........\regkeys
...........\................\...\...\............\trce
...........\................\...\...\............\....\regkeys
...........\................\...\...\............\tsim
...........\................\...\...\............\....\regkeys
...........\................\...\...\............\vhpcomp
...........\................\...\...\............\.......\regkeys
...........\................\...\...\............\vlogcomp
...........\................\...\...\............\........\regkeys
...........\................\...\...\............\WebTalk
...........\................\...\...\............\.......\DesignDataCollection
...........\................\...\...\............\.......\....................\regkeys
...........\................\...\...\............\.......\regkeys
...........\................\...\...\............\xpwr
...........\................\...\...\............\....\regkeys
...........\................\...\...\............\xreport
...........\................\...\...\............\.......\regkeys
...........\................\...\...\............\XSLTProcess
...........\................\...\...\............\...........\regkeys
...........\................\...\...\............\xst
...........\................\...\...\............\...\regkeys
...........\................\...\...\............\_ProjRepoInternal_
...........\................\...\...\............\..................\regkeys
...........\................\...\...\version
...........\................\...\ise.lock
...........\................\cst.xbcd
...........\xst
...........\...\dump.xst
...........\...\........\counter.prj
...........\...\........\...........\ngx
...........\...\........\...........\...\notopt
...........\...\........\...........\...\opt
...........\...\........\...........\ntrc.scr
...........\...\file graph
...........\...\projnav.tmp
...........\...\work
...........\...\....\sub00
...........\...\....\.....\vhpl00.vho
...........\...\....\.....\vhpl01.vho
...........\...\....\.....\vhpl02.vho
...........\...\....\.....\vhpl03.vho
...........\...\....\hdllib.ref
...........\...\....\hdpdeps.ref
...........\_ngo
...........\....\netlist.lst
...........\_xmsgs
...........\......\bitgen.xmsgs
...........\......\map.xmsgs
...........\......\ngdbuild.xmsgs
...........\......\par.xmsgs
...........\......\trce.xmsgs
...........\......\xst.xmsgs
...........\.lso
...........\counter.bgn
...........\counter.bit
...........\counter.bld
...........\counter.cmd_log
...........\counter.drc
...........\counter.lso
...........\counter.ncd
...........\counter.ngc
...........\counter.ngd
...........\counter.ngr
...........\counter.pad
...........\counter.par
...........\counter.pcf
...........\counter.prj
...........\counter.ptwx
...........\counter.stx
...........\counter.syr
...........\counter.twr
...........\counter.twx
...........\counter.unroutes
...........\counter.ut
...........\counter.xpi
...........\counter.xst
...........\counter_comp.vhd
...........\counter_guide.ncd
...........\counter_map.map
...........\counter_map.mrp
...........\counter_map.ncd
...........\counter_map.ngm
...........\counter_map.xrpt
...........\counter_ngdbuild.xrpt
...........\counter_pad.csv
...........\counter_pad.txt
...........\counter_par.xrpt
...........\counter_prev_built.ngd
...........\counter_summary.html
...........\counter_summary.xml
...........\counter_usage.xml
...........\counter_vhdl.prj
...........\counter_xst.xrpt
...........\device_usage_statistics.html
...........\fuse.log
...........\isim.cmd
...........\isim.hdlsourcefiles
...........\isim.log
...........\isimwavedata.xwv
...........\pepExtractor.prj
...........\tb_count.vhd
...........\tb_count_beh.prj
...........\tb_count_isim_beh.exe
...........\tb_count_isim_beh.wfs
...........\tb_count_stx.prj
...........\test.txt
...........\ucf_counter.ucf
...........\up_down_cntr.ise
...........\up_down_cntr.ntrc_log
...........\up_down_cntr.restore
...........\up_down_cntr.vhd
...........\xilinxsim.ini