Standard Modbus protocol code, you can use

ModBus-RTU模块化程序库
ModBus-RTU模块化程序库\Display.LST
ModBus-RTU模块化程序库\Display.OBJ
ModBus-RTU模块化程序库\Display.__i
ModBus-RTU模块化程序库\Display.bak
ModBus-RTU模块化程序库\Display.c
ModBus-RTU模块化程序库\Display.h
ModBus-RTU模块化程序库\Modbus
ModBus-RTU模块化程序库\Modbus.LST
ModBus-RTU模块化程序库\Modbus.M51
ModBus-RTU模块化程序库\Modbus.OBJ
ModBus-RTU模块化程序库\Modbus.Uv2.bak
ModBus-RTU模块化程序库\Modbus.__i
ModBus-RTU模块化程序库\Modbus.bak
ModBus-RTU模块化程序库\Modbus.c
ModBus-RTU模块化程序库\Modbus.h
ModBus-RTU模块化程序库\Modbus.hex
ModBus-RTU模块化程序库\Modbus.lnp
ModBus-RTU模块化程序库\Modbus.opt.bak
ModBus-RTU模块化程序库\Modbus.plg
ModBus-RTU模块化程序库\Modbus.uvopt
ModBus-RTU模块化程序库\Modbus.uvproj
ModBus-RTU模块化程序库\Modbus_Opt.Bak
ModBus-RTU模块化程序库\Modbus_Uv2.Bak
ModBus-RTU模块化程序库\Modbus_uvopt.bak
ModBus-RTU模块化程序库\STARTUP.A51
ModBus-RTU模块化程序库\STARTUP.LST
ModBus-RTU模块化程序库\STARTUP.OBJ
ModBus-RTU模块化程序库\UART.LST
ModBus-RTU模块化程序库\UART.OBJ
ModBus-RTU模块化程序库\UART.__i
ModBus-RTU模块化程序库\UART.bak
ModBus-RTU模块化程序库\UART.c
ModBus-RTU模块化程序库\UART.h
ModBus-RTU模块化程序库\main.LST
ModBus-RTU模块化程序库\main.OBJ
ModBus-RTU模块化程序库\main.__i
ModBus-RTU模块化程序库\main.bak
ModBus-RTU模块化程序库\main.c
ModBus-RTU模块化程序库\复件 Modbus.c

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