Matrix keyboard, eight key show 0 ~ f, than in digital tube display

KEY_SCAN
........\Src
........\...\matrikeyscan.vhd
........\...\matrikeyscan.vhd.bak
........\quartus
........\.......\db
........\.......\..\matrikeyscan.asm.qmsg
........\.......\..\matrikeyscan.asm_labs.ddb
........\.......\..\matrikeyscan.cbx.xml
........\.......\..\matrikeyscan.cmp.bpm
........\.......\..\matrikeyscan.cmp.cdb
........\.......\..\matrikeyscan.cmp.ecobp
........\.......\..\matrikeyscan.cmp.hdb
........\.......\..\matrikeyscan.cmp.kpt
........\.......\..\matrikeyscan.cmp.logdb
........\.......\..\matrikeyscan.cmp.rdb
........\.......\..\matrikeyscan.cmp.tdb
........\.......\..\matrikeyscan.cmp0.ddb
........\.......\..\matrikeyscan.cmp2.ddb
........\.......\..\matrikeyscan.cmp_merge.kpt
........\.......\..\matrikeyscan.db_info
........\.......\..\matrikeyscan.eco.cdb
........\.......\..\matrikeyscan.fit.qmsg
........\.......\..\matrikeyscan.hier_info
........\.......\..\matrikeyscan.hif
........\.......\..\matrikeyscan.lpc.html
........\.......\..\matrikeyscan.lpc.rdb
........\.......\..\matrikeyscan.lpc.txt
........\.......\..\matrikeyscan.map.bpm
........\.......\..\matrikeyscan.map.cdb
........\.......\..\matrikeyscan.map.ecobp
........\.......\..\matrikeyscan.map.hdb
........\.......\..\matrikeyscan.map.kpt
........\.......\..\matrikeyscan.map.logdb
........\.......\..\matrikeyscan.map.qmsg
........\.......\..\matrikeyscan.map_bb.cdb
........\.......\..\matrikeyscan.map_bb.hdb
........\.......\..\matrikeyscan.map_bb.logdb
........\.......\..\matrikeyscan.pre_map.cdb
........\.......\..\matrikeyscan.pre_map.hdb
........\.......\..\matrikeyscan.rtlv.hdb
........\.......\..\matrikeyscan.rtlv_sg.cdb
........\.......\..\matrikeyscan.rtlv_sg_swap.cdb
........\.......\..\matrikeyscan.sgdiff.cdb
........\.......\..\matrikeyscan.sgdiff.hdb
........\.......\..\matrikeyscan.sld_design_entry.sci
........\.......\..\matrikeyscan.sld_design_entry_dsc.sci
........\.......\..\matrikeyscan.syn_hier_info
........\.......\..\matrikeyscan.tan.qmsg
........\.......\..\matrikeyscan.tis_db_list.ddb
........\.......\..\matrikeyscan.tmw_info
........\.......\..\matrikeyscan_global_asgn_op.abo
........\.......\..\prev_cmp_matrikeyscan.asm.qmsg
........\.......\..\prev_cmp_matrikeyscan.fit.qmsg
........\.......\..\prev_cmp_matrikeyscan.map.qmsg
........\.......\..\prev_cmp_matrikeyscan.qmsg
........\.......\..\prev_cmp_matrikeyscan.tan.qmsg
........\.......\incremental_db
........\.......\..............\README
........\.......\..............\compiled_partitions
........\.......\..............\...................\matrikeyscan.root_partition.cmp.atm
........\.......\..............\...................\matrikeyscan.root_partition.cmp.dfp
........\.......\..............\...................\matrikeyscan.root_partition.cmp.hdbx
........\.......\..............\...................\matrikeyscan.root_partition.cmp.kpt
........\.......\..............\...................\matrikeyscan.root_partition.cmp.logdb
........\.......\..............\...................\matrikeyscan.root_partition.cmp.rcf
........\.......\..............\...................\matrikeyscan.root_partition.map.atm
........\.......\..............\...................\matrikeyscan.root_partition.map.dpi
........\.......\..............\...................\matrikeyscan.root_partition.map.hdbx
........\.......\..............\...................\matrikeyscan.root_partition.map.kpt
........\.......\matrikeyscan.asm.rpt
........\.......\matrikeyscan.done
........\.......\matrikeyscan.dpf
........\.......\matrikeyscan.fit.rpt
........\.......\matrikeyscan.fit.smsg
........\.......\matrikeyscan.fit.summary
........\.......\matrikeyscan.flow.rpt
........\.......\matrikeyscan.map.rpt
........\.......\matrikeyscan.map.summary
........\.......\matrikeyscan.pin
........\.......\matrikeyscan.pof
........\.......\matrikeyscan.qpf
........\.......\matrikeyscan.qsf
........\.......\matrikeyscan.qws
........\.......\matrikeyscan.sof
........\.......\matrikeyscan.tan.rpt
........\.......\matrikeyscan.tan.summary

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