This written in VHDL digital logic circuit。It can realize the function of timing and by 23:59 to 00:00 conversion, has been in the FPGA test through!

shizhong
........\db
........\..\prev_cmp_shuzishizhong.asm.qmsg
........\..\prev_cmp_shuzishizhong.fit.qmsg
........\..\prev_cmp_shuzishizhong.map.qmsg
........\..\prev_cmp_shuzishizhong.qmsg
........\..\prev_cmp_shuzishizhong.tan.qmsg
........\..\shuzishizhong.asm.qmsg
........\..\shuzishizhong.asm_labs.ddb
........\..\shuzishizhong.cbx.xml
........\..\shuzishizhong.cmp.bpm
........\..\shuzishizhong.cmp.cdb
........\..\shuzishizhong.cmp.ecobp
........\..\shuzishizhong.cmp.hdb
........\..\shuzishizhong.cmp.logdb
........\..\shuzishizhong.cmp.rdb
........\..\shuzishizhong.cmp.tdb
........\..\shuzishizhong.cmp0.ddb
........\..\shuzishizhong.cmp2.ddb
........\..\shuzishizhong.cmp_bb.cdb
........\..\shuzishizhong.cmp_bb.hdb
........\..\shuzishizhong.cmp_bb.logdb
........\..\shuzishizhong.cmp_bb.rcf
........\..\shuzishizhong.db_info
........\..\shuzishizhong.dbp
........\..\shuzishizhong.eco.cdb
........\..\shuzishizhong.fit.qmsg
........\..\shuzishizhong.hier_info
........\..\shuzishizhong.hif
........\..\shuzishizhong.map.bpm
........\..\shuzishizhong.map.cdb
........\..\shuzishizhong.map.ecobp
........\..\shuzishizhong.map.hdb
........\..\shuzishizhong.map.logdb
........\..\shuzishizhong.map.qmsg
........\..\shuzishizhong.map_bb.cdb
........\..\shuzishizhong.map_bb.hdb
........\..\shuzishizhong.map_bb.logdb
........\..\shuzishizhong.pre_map.cdb
........\..\shuzishizhong.pre_map.hdb
........\..\shuzishizhong.psp
........\..\shuzishizhong.pss
........\..\shuzishizhong.rtlv.hdb
........\..\shuzishizhong.rtlv_sg.cdb
........\..\shuzishizhong.rtlv_sg_swap.cdb
........\..\shuzishizhong.sgdiff.cdb
........\..\shuzishizhong.sgdiff.hdb
........\..\shuzishizhong.signalprobe.cdb
........\..\shuzishizhong.sld_design_entry.sci
........\..\shuzishizhong.sld_design_entry_dsc.sci
........\..\shuzishizhong.syn_hier_info
........\..\shuzishizhong.tan.qmsg
........\..\shuzishizhong.tis_db_list.ddb
........\shuzishizhong.asm.rpt
........\shuzishizhong.done
........\shuzishizhong.dpf
........\shuzishizhong.fit.rpt
........\shuzishizhong.fit.smsg
........\shuzishizhong.fit.summary
........\shuzishizhong.flow.rpt
........\shuzishizhong.map.rpt
........\shuzishizhong.map.summary
........\shuzishizhong.pin
........\shuzishizhong.pof
........\shuzishizhong.qpf
........\shuzishizhong.qsf
........\shuzishizhong.qws
........\shuzishizhong.sof
........\shuzishizhong.tan.rpt
........\shuzishizhong.tan.summary
........\shuzishizhong.vhd

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