D51 MCU MODBUS function, industrial control area can be used for reference.

ModBus\51单片机modbus例程\modbus51\main.c
......\..................\........\main.h
......\..................\........\main.LST
......\..................\........\main.OBJ
......\..................\........\main.opt.bak
......\..................\........\main.Uv2.bak
......\..................\........\main.uvopt
......\..................\........\main.uvproj
......\..................\........\main.__i
......\..................\........\main_Opt.Bak
......\..................\........\main_Uv2.Bak
......\..................\........\modbus.c
......\..................\........\modbus.h
......\..................\........\modbus.LST
......\..................\........\modbus.OBJ
......\..................\........\modbus.__i
......\..................\........\modbus51
......\..................\........\modbus51.hex
......\..................\........\modbus51.lnp
......\..................\........\modbus51.M51
......\..................\........\modbus51.plg
......\..................\........\STARTUP.A51
......\..................\........\Startup.LST
......\..................\........\Startup.OBJ
......\80C51SFR解释.doc
......\Atmel 8051 Microcontrollers.pdf
......\modbus RTU 的 AVR 单片机 C程序.doc
......\modbus RTU 的 C51 单片机 程序.doc
......\Modbus VC编程.doc
......\Modbus.doc
......\Modbus.pdf
......\modbus51\modbus51\main.c
......\........\........\main.h
......\........\........\main.LST
......\........\........\main.OBJ
......\........\........\main.Opt
......\........\........\main.Uv2
......\........\........\main_Opt.Bak
......\........\........\main_Uv2.Bak
......\........\........\modbus.c
......\........\........\modbus.h
......\........\........\modbus.LST
......\........\........\modbus.OBJ
......\........\........\modbus51
......\........\........\modbus51.hex
......\........\........\modbus51.M51
......\........\........\modbus51.plg
......\........\........\STARTUP.A51
......\........\........\Startup.LST
......\........\........\Startup.OBJ
......\......M16\modbusM16\init.c
......\.........\.........\init.dp2
......\.........\.........\init.lis
......\.........\.........\init.o
......\.........\.........\init.s
......\.........\.........\main.c
......\.........\.........\main.dp2
......\.........\.........\main.h
......\.........\.........\main.lis
......\.........\.........\main.o
......\.........\.........\main.s
......\.........\.........\modbus16.c
......\.........\.........\modbus16.dp2
......\.........\.........\modbus16.h
......\.........\.........\modbus16.lis
......\.........\.........\modbus16.o
......\.........\.........\modbus16.s
......\.........\.........\modbus16._c
......\.........\.........\modbus16._h
......\.........\.........\modbusM16.cof
......\.........\.........\modbusM16.dbg
......\.........\.........\modbusM16.hex
......\.........\.........\modbusM16.lk
......\.........\.........\modbusM16.lst
......\.........\.........\modbusM16.mak
......\.........\.........\modbusM16.mp
......\.........\.........\modbusM16.prj
......\.........\.........\MODBUSM16.SRC
......\Modbus两种协议的编程方法.doc
......\Modbus协议下单片机与eView触摸屏的通信方法.doc
......\Modbus通讯协议 .doc
......\MODBUS通讯协议及编程.doc
......\Modbus通讯协议简介.doc
......\_MODbus.pdf
......\_modbusconmmunication(chinese).pdf
......\_RS232通信程序.doc
......\_三相功率表（功率因数）使用说明书MODBUS.doc
......\_基于Modbus的智能工业控制器监控系统的设计.doc
......\串口通讯的概念及接口电路.doc
......\51单片机modbus例程\modbus51
......\modbus51\modbus51
......\......M16\modbusM16
......\51单片机modbus例程
......\modbus51
......\modbusM16
ModBus

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