4* 4 matrix keyboard (must have pull-up resistor), has debounce, can be directly used.

jianpan_and_shumaguan\.HDI-PlanAhead-3768-wzw-PC\ngc2edif\ngc2edif.log
.....................\..........................\........\_xmsgs\ngc2edif.xmsgs
.....................\clk_gen_summary.html
.....................\iseconfig\.xreport
.....................\.........\jianpan_and_shumaguan.projectmgr
.....................\.........\JP_AND_SMG.xreport
.....................\jianpan_and_shumaguan.gise
.....................\jianpan_and_shumaguan.xise
.....................\jp_and_smg.bgn
.....................\jp_and_smg.bit
.....................\JP_AND_SMG.bld
.....................\JP_AND_SMG.cmd_log
.....................\jp_and_smg.drc
.....................\JP_AND_SMG.lso
.....................\JP_AND_SMG.ncd
.....................\JP_AND_SMG.ngc
.....................\JP_AND_SMG.ngd
.....................\JP_AND_SMG.ngr
.....................\JP_AND_SMG.pad
.....................\JP_AND_SMG.par
.....................\JP_AND_SMG.pcf
.....................\JP_AND_SMG.prj
.....................\JP_AND_SMG.ptwx
.....................\JP_AND_SMG.stx
.....................\JP_AND_SMG.syr
.....................\JP_AND_SMG.twr
.....................\JP_AND_SMG.twx
.....................\JP_AND_SMG.ucf
.....................\JP_AND_SMG.unroutes
.....................\JP_AND_SMG.ut
.....................\JP_AND_SMG.vhd
.....................\JP_AND_SMG.xpi
.....................\JP_AND_SMG.xst
.....................\JP_AND_SMG_bitgen.xwbt
.....................\JP_AND_SMG_envsettings.html
.....................\JP_AND_SMG_guide.ncd
.....................\JP_AND_SMG_map.map
.....................\JP_AND_SMG_map.mrp
.....................\JP_AND_SMG_map.ncd
.....................\JP_AND_SMG_map.ngm
.....................\JP_AND_SMG_map.xrpt
.....................\JP_AND_SMG_ngdbuild.xrpt
.....................\JP_AND_SMG_pad.csv
.....................\JP_AND_SMG_pad.txt
.....................\JP_AND_SMG_par.xrpt
.....................\JP_AND_SMG_summary.html
.....................\JP_AND_SMG_summary.xml
.....................\JP_AND_SMG_usage.xml
.....................\JP_AND_SMG_vhdl.prj
.....................\JP_AND_SMG_xst.xrpt
.....................\key44.bgn
.....................\key44.bld
.....................\key44.cmd_log
.....................\key44.drc
.....................\key44.lso
.....................\key44.ncd
.....................\key44.ngc
.....................\key44.ngd
.....................\key44.ngr
.....................\key44.pad
.....................\key44.par
.....................\key44.pcf
.....................\key44.prj
.....................\key44.ptwx
.....................\key44.stx
.....................\key44.syr
.....................\key44.twr
.....................\key44.twx
.....................\key44.ucf
.....................\key44.unroutes
.....................\key44.ut
.....................\key44.xpi
.....................\key44.xst
.....................\key44_bitgen.xwbt
.....................\key44_envsettings.html
.....................\key44_guide.ncd
.....................\key44_map.map
.....................\key44_map.mrp
.....................\key44_map.ncd
.....................\key44_map.ngm
.....................\key44_map.xrpt
.....................\key44_ngdbuild.xrpt
.....................\key44_pad.csv
.....................\key44_pad.txt
.....................\key44_par.xrpt
.....................\key44_summary.html
.....................\key44_summary.xml
.....................\key44_usage.xml
.....................\key44_vhdl.prj
.....................\key44_xst.xrpt
.....................\keyboard.bgn
.....................\keyboard.bld
.....................\keyboard.cmd_log
.....................\keyboard.drc
.....................\keyboard.lso
.....................\keyboard.ncd
.....................\keyboard.ngc
.....................\keyboard.ngd
.....................\keyboard.ngr
.....................\keyboard.pad

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