Has been a complete VHDL program measurement and verification, measurement range from 1Hz to 1GHz frequency counter can be used as a counter LCD1602 displays frequency value, the four separate buttons can control the output frequency value, the control corresponds to an independent LEDlight off, control the buzzer. The input crystal frequency is 25MHz, does not meet your own to change the parameters in the frequency multiplier.

LCD显示频率计\altpll0.bsf
.............\altpll0.cmp
.............\altpll0.ppf
.............\altpll0.qip
.............\altpll0.vhd
.............\altpll0_wave0.jpg
.............\altpll0_waveforms.html
.............\altpll1.bsf
.............\altpll1.cmp
.............\altpll1.ppf
.............\altpll1.qip
.............\altpll1.vhd
.............\altpll1_wave0.jpg
.............\altpll1_waveforms.html
.............\beep.bsf
.............\beep.v.bak
.............\beepin.bsf
.............\Block1.bdf
.............\cf.bsf
.............\cf.vhd
.............\cf.vhd.bak
.............\clk_div.bsf
.............\clk_div.vhd
.............\cz.bsf
.............\cz.vhd
.............\cz.vhd.bak
.............\db\prev_cmp_tmx.asm.qmsg
.............\..\prev_cmp_tmx.fit.qmsg
.............\..\prev_cmp_tmx.map.qmsg
.............\..\prev_cmp_tmx.qmsg
.............\..\prev_cmp_tmx.sim.qmsg
.............\..\prev_cmp_tmx.sta.qmsg
.............\..\prev_cmp_tmx.tan.qmsg
.............\..\tmx.asm.qmsg
.............\..\tmx.asm_labs.ddb
.............\..\tmx.cbx.xml
.............\..\tmx.cmp.cdb
.............\..\tmx.cmp.hdb
.............\..\tmx.cmp.kpt
.............\..\tmx.cmp.logdb
.............\..\tmx.cmp.rdb
.............\..\tmx.cmp.tdb
.............\..\tmx.cmp0.ddb
.............\..\tmx.cmp2.ddb
.............\..\tmx.db_info
.............\..\tmx.eco.cdb
.............\..\tmx.eds_overflow
.............\..\tmx.fit.qmsg
.............\..\tmx.hier_info
.............\..\tmx.hif
.............\..\tmx.map.cdb
.............\..\tmx.map.hdb
.............\..\tmx.map.logdb
.............\..\tmx.map.qmsg
.............\..\tmx.pre_map.cdb
.............\..\tmx.pre_map.hdb
.............\..\tmx.rtlv.hdb
.............\..\tmx.rtlv_sg.cdb
.............\..\tmx.rtlv_sg_swap.cdb
.............\..\tmx.sgdiff.cdb
.............\..\tmx.sgdiff.hdb
.............\..\tmx.sim.cvwf
.............\..\tmx.sim.hdb
.............\..\tmx.sim.qmsg
.............\..\tmx.sim.rdb
.............\..\tmx.sld_design_entry.sci
.............\..\tmx.sld_design_entry_dsc.sci
.............\..\tmx.smp_dump.txt
.............\..\tmx.sta.qmsg
.............\..\tmx.sta.rdb
.............\..\tmx.syn_hier_info
.............\..\tmx.tan.qmsg
.............\..\tmx.tis_db_list.ddb
.............\..\tmx.tmw_info
.............\..\wed.wsf
.............\dis.bsf
.............\dis.vhd
.............\dis.vhd.bak
.............\incremental_db\compiled_partitions\tmx.root_partition.map.kpt
.............\..............\README
.............\key_debounce.v
.............\key_debounce.v.bak
.............\key_led.bsf
.............\key_led.v
.............\key_led.v.bak
.............\led_key_beep.bsf
.............\led_key_beep.vhd
.............\led_key_beep.vhd.bak
.............\tmx.asm.rpt
.............\tmx.bsf
.............\tmx.cdf
.............\tmx.done
.............\tmx.dpf
.............\tmx.fit.rpt
.............\tmx.fit.smsg
.............\tmx.fit.summary
.............\tmx.flow.rpt
.............\tmx.map.rpt
.............\tmx.map.summary
.............\tmx.pin

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