VHDL language to achieve scanning keyboard and display on the digital

KEY\db\key4x4.amm.cdb
...\..\key4x4.asm.qmsg
...\..\key4x4.asm.rdb
...\..\key4x4.asm_labs.ddb
...\..\key4x4.cbx.xml
...\..\key4x4.cmp.bpm
...\..\key4x4.cmp.cdb
...\..\key4x4.cmp.hdb
...\..\key4x4.cmp.kpt
...\..\key4x4.cmp.logdb
...\..\key4x4.cmp.rdb
...\..\key4x4.cmp0.ddb
...\..\key4x4.cmp1.ddb
...\..\key4x4.cmp2.ddb
...\..\key4x4.cmp_merge.kpt
...\..\key4x4.db_info
...\..\key4x4.fit.qmsg
...\..\key4x4.hier_info
...\..\key4x4.hif
...\..\key4x4.idb.cdb
...\..\key4x4.lpc.html
...\..\key4x4.lpc.rdb
...\..\key4x4.lpc.txt
...\..\key4x4.map.bpm
...\..\key4x4.map.cdb
...\..\key4x4.map.hdb
...\..\key4x4.map.kpt
...\..\key4x4.map.logdb
...\..\key4x4.map.qmsg
...\..\key4x4.map_bb.cdb
...\..\key4x4.map_bb.hdb
...\..\key4x4.map_bb.logdb
...\..\key4x4.pre_map.cdb
...\..\key4x4.pre_map.hdb
...\..\key4x4.rtlv.hdb
...\..\key4x4.rtlv_sg.cdb
...\..\key4x4.rtlv_sg_swap.cdb
...\..\key4x4.sgdiff.cdb
...\..\key4x4.sgdiff.hdb
...\..\key4x4.sld_design_entry.sci
...\..\key4x4.sld_design_entry_dsc.sci
...\..\key4x4.smart_action.txt
...\..\key4x4.smp_dump.txt
...\..\key4x4.sta.qmsg
...\..\key4x4.sta.rdb
...\..\key4x4.sta_cmp.8_slow.tdb
...\..\key4x4.syn_hier_info
...\..\key4x4.tis_db_list.ddb
...\..\key4x4.tmw_info
...\..\logic_util_heursitic.dat
...\..\prev_cmp_key4x4.qmsg
...\incremental_db\compiled_partitions\key4x4.db_info
...\..............\...................\key4x4.root_partition.cmp.cdb
...\..............\...................\key4x4.root_partition.cmp.dfp
...\..............\...................\key4x4.root_partition.cmp.hdb
...\..............\...................\key4x4.root_partition.cmp.kpt
...\..............\...................\key4x4.root_partition.cmp.logdb
...\..............\...................\key4x4.root_partition.cmp.rcfdb
...\..............\...................\key4x4.root_partition.map.cdb
...\..............\...................\key4x4.root_partition.map.dpi
...\..............\...................\key4x4.root_partition.map.hbdb.cdb
...\..............\...................\key4x4.root_partition.map.hbdb.hb_info
...\..............\...................\key4x4.root_partition.map.hbdb.hdb
...\..............\...................\key4x4.root_partition.map.hbdb.sig
...\..............\...................\key4x4.root_partition.map.hdb
...\..............\...................\key4x4.root_partition.map.kpt
...\..............\README
...\key4x4.asm.rpt
...\key4x4.done
...\key4x4.fit.rpt
...\key4x4.fit.smsg
...\key4x4.fit.summary
...\key4x4.flow.rpt
...\key4x4.map.rpt
...\key4x4.map.summary
...\key4x4.pin
...\key4x4.pof
...\key4x4.qpf
...\key4x4.qsf
...\key4x4.sof
...\key4x4.sta.rpt
...\key4x4.sta.summary
...\key4x4.vhd
...\key4x4.vhd.bak
...\key_scan.vhd
...\key_scan.vhd.bak
...\scan_clk.vhd
...\scan_clk.vhd.bak
...\incremental_db\compiled_partitions
...\db
...\incremental_db
KEY

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