Program six counters, 000000 999999, an enable signal en enable signal en by the FPGA pin 68 access, using the signal generator to produce a square wave, en signal is 1 when the counter count for input square-wave amplitude adjusted to 3.3V, can be found in the counter for some time to stop, and then count.

复件 999999\999999.vhd
...........\clkhms.bsf
...........\clkhms.vhd
...........\clkhms.vhd.bak
...........\db\jshu.asm.qmsg
...........\..\jshu.asm_labs.ddb
...........\..\jshu.cbx.xml
...........\..\jshu.cmp.bpm
...........\..\jshu.cmp.cdb
...........\..\jshu.cmp.ecobp
...........\..\jshu.cmp.hdb
...........\..\jshu.cmp.kpt
...........\..\jshu.cmp.logdb
...........\..\jshu.cmp.rdb
...........\..\jshu.cmp.tdb
...........\..\jshu.cmp0.ddb
...........\..\jshu.cmp2.ddb
...........\..\jshu.cmp_merge.kpt
...........\..\jshu.db_info
...........\..\jshu.eco.cdb
...........\..\jshu.fit.qmsg
...........\..\jshu.hier_info
...........\..\jshu.hif
...........\..\jshu.lpc.html
...........\..\jshu.lpc.rdb
...........\..\jshu.lpc.txt
...........\..\jshu.map.bpm
...........\..\jshu.map.cdb
...........\..\jshu.map.ecobp
...........\..\jshu.map.hdb
...........\..\jshu.map.kpt
...........\..\jshu.map.logdb
...........\..\jshu.map.qmsg
...........\..\jshu.map_bb.cdb
...........\..\jshu.map_bb.hdb
...........\..\jshu.map_bb.logdb
...........\..\jshu.pre_map.cdb
...........\..\jshu.pre_map.hdb
...........\..\jshu.rtlv.hdb
...........\..\jshu.rtlv_sg.cdb
...........\..\jshu.rtlv_sg_swap.cdb
...........\..\jshu.sgdiff.cdb
...........\..\jshu.sgdiff.hdb
...........\..\jshu.sld_design_entry.sci
...........\..\jshu.sld_design_entry_dsc.sci
...........\..\jshu.syn_hier_info
...........\..\jshu.tan.qmsg
...........\..\jshu.tis_db_list.ddb
...........\..\jshu.tmw_info
...........\..\jshu_global_asgn_op.abo
...........\..\prev_cmp_jshu.asm.qmsg
...........\..\prev_cmp_jshu.fit.qmsg
...........\..\prev_cmp_jshu.map.qmsg
...........\..\prev_cmp_jshu.qmsg
...........\..\prev_cmp_jshu.tan.qmsg
...........\div.bdf
...........\div.bsf
...........\incremental_db\compiled_partitions\jshu.root_partition.cmp.atm
...........\..............\...................\jshu.root_partition.cmp.dfp
...........\..............\...................\jshu.root_partition.cmp.hdbx
...........\..............\...................\jshu.root_partition.cmp.kpt
...........\..............\...................\jshu.root_partition.cmp.logdb
...........\..............\...................\jshu.root_partition.cmp.rcf
...........\..............\...................\jshu.root_partition.map.atm
...........\..............\...................\jshu.root_partition.map.dpi
...........\..............\...................\jshu.root_partition.map.hdbx
...........\..............\...................\jshu.root_partition.map.kpt
...........\..............\...................\jshu.root_partition.merge_hb.atm
...........\..............\README
...........\jshu.asm.rpt
...........\jshu.bdf
...........\jshu.done
...........\jshu.dpf
...........\jshu.fit.rpt
...........\jshu.fit.smsg
...........\jshu.fit.summary
...........\jshu.flow.rpt
...........\jshu.map.rpt
...........\jshu.map.summary
...........\jshu.pin
...........\jshu.pof
...........\jshu.qpf
...........\jshu.qsf
...........\jshu.qws
...........\jshu.sof
...........\jshu.tan.rpt
...........\jshu.tan.summary
...........\pl.bsf
...........\pl.cmp
...........\pl.ppf
...........\pl.qip
...........\pl.vhd
...........\pl_inst.vhd
...........\pl_wave0.jpg
...........\pl_waveforms.html
...........\serv_req_info.txt
...........\程序说明.txt
...........\incremental_db\compiled_partitions
...........\db
...........\incremental_db

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