Such as precision measurement principle based on the frequency meter, AT89S52 and CPLD, has detailed notes. Measurement accuracy.

Packet : 23825731s51 cpld.rar filelist
S51+CPLD\cpld\freq.ajx
S51+CPLD\cpld\freq.chn
S51+CPLD\cpld\freq.log
S51+CPLD\cpld\freq.rpt
S51+CPLD\cpld\top.jed
S51+CPLD\cpld源码\cpld\bus8.cmp
S51+CPLD\cpld源码\cpld\bus8.inc
S51+CPLD\cpld源码\cpld\bus8.sym
S51+CPLD\cpld源码\cpld\bus8.tdf
S51+CPLD\cpld源码\cpld\bus8_inst.tdf
S51+CPLD\cpld源码\cpld\counter32.acf
S51+CPLD\cpld源码\cpld\counter32.cmp
S51+CPLD\cpld源码\cpld\counter32.hif
S51+CPLD\cpld源码\cpld\counter32.inc
S51+CPLD\cpld源码\cpld\counter32.sym
S51+CPLD\cpld源码\cpld\counter32.tdf
S51+CPLD\cpld源码\cpld\counter32_inst.tdf
S51+CPLD\cpld源码\cpld\freq.ajx
S51+CPLD\cpld源码\cpld\freq.chn
S51+CPLD\cpld源码\cpld\freq.log
S51+CPLD\cpld源码\cpld\freq.rpt
S51+CPLD\cpld源码\cpld\frequency.acf
S51+CPLD\cpld源码\cpld\frequency.fit
S51+CPLD\cpld源码\cpld\frequency.gdf
S51+CPLD\cpld源码\cpld\frequency.hif
S51+CPLD\cpld源码\cpld\frequency.jam
S51+CPLD\cpld源码\cpld\frequency.jbc
S51+CPLD\cpld源码\cpld\frequency.mmf
S51+CPLD\cpld源码\cpld\frequency.ndb
S51+CPLD\cpld源码\cpld\frequency.pin
S51+CPLD\cpld源码\cpld\frequency.snf
S51+CPLD\cpld源码\cpld\frequency.sym
S51+CPLD\cpld源码\cpld\mcu_ctrl(1).cnf
S51+CPLD\cpld源码\cpld\mcu_ctrl(2).cnf
S51+CPLD\cpld源码\cpld\mcu_ctrl.acf
S51+CPLD\cpld源码\cpld\mcu_ctrl.cnf
S51+CPLD\cpld源码\cpld\mcu_ctrl.fit
S51+CPLD\cpld源码\cpld\mcu_ctrl.gdf
S51+CPLD\cpld源码\cpld\mcu_ctrl.hif
S51+CPLD\cpld源码\cpld\mcu_ctrl.jam
S51+CPLD\cpld源码\cpld\mcu_ctrl.jbc
S51+CPLD\cpld源码\cpld\mcu_ctrl.mmf
S51+CPLD\cpld源码\cpld\mcu_ctrl.ndb
S51+CPLD\cpld源码\cpld\mcu_ctrl.pin
S51+CPLD\cpld源码\cpld\mcu_ctrl.rpt
S51+CPLD\cpld源码\cpld\mcu_ctrl.snf
S51+CPLD\cpld源码\cpld\mcu_ctrl.sym
S51+CPLD\cpld源码\cpld\top(1).cnf
S51+CPLD\cpld源码\cpld\top(10).cnf
S51+CPLD\cpld源码\cpld\top(11).cnf
S51+CPLD\cpld源码\cpld\top(17).cnf
S51+CPLD\cpld源码\cpld\top(18).cnf
S51+CPLD\cpld源码\cpld\top(19).cnf
S51+CPLD\cpld源码\cpld\top(2).cnf
S51+CPLD\cpld源码\cpld\top(20).cnf
S51+CPLD\cpld源码\cpld\top(3).cnf
S51+CPLD\cpld源码\cpld\top(4).cnf
S51+CPLD\cpld源码\cpld\top(8).cnf
S51+CPLD\cpld源码\cpld\top(9).cnf
S51+CPLD\cpld源码\cpld\top.acf
S51+CPLD\cpld源码\cpld\top.cnf
S51+CPLD\cpld源码\cpld\top.fit
S51+CPLD\cpld源码\cpld\top.gdf
S51+CPLD\cpld源码\cpld\top.hif
S51+CPLD\cpld源码\cpld\top.jam
S51+CPLD\cpld源码\cpld\top.jbc
S51+CPLD\cpld源码\cpld\top.jed
S51+CPLD\cpld源码\cpld\top.mmf
S51+CPLD\cpld源码\cpld\top.ndb
S51+CPLD\cpld源码\cpld\top.pin
S51+CPLD\cpld源码\cpld\top.pof
S51+CPLD\cpld源码\cpld\top.rpt
S51+CPLD\cpld源码\cpld\top.snf
S51+CPLD\cpld源码\cpld\top.sym
S51+CPLD\cpld源码\cpld\top.txt
S51+CPLD\cpld源码\cpld内部计数器.gif
S51+CPLD\cpld源码\cpld顶层设计.gif
S51+CPLD\mcu\Demo
S51+CPLD\mcu\Demo.hex
S51+CPLD\mcu\Demo.lnp
S51+CPLD\mcu\Demo.M51
S51+CPLD\mcu\Demo.Opt
S51+CPLD\mcu\Demo.plg
S51+CPLD\mcu\Demo.Uv2
S51+CPLD\mcu\Demo_Opt.Bak
S51+CPLD\mcu\Demo_Uv2.Bak
S51+CPLD\mcu\LCD1602.h
S51+CPLD\mcu\main.c
S51+CPLD\mcu\main.LST
S51+CPLD\mcu\main.OBJ
S51+CPLD\硬件连接.txt
S51+CPLD\等精度测量.pdf
S51+CPLD\cpld源码\cpld
S51+CPLD\cpld
S51+CPLD\cpld源码
S51+CPLD\mcu
S51+CPLD

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