C51 Microcontroller development, there are examples there are described, is a good stuff

电热恒温水壶系统\protus仿真（包括源程序）\DS18B20.H
................\........................\KEYSCAN.H
................\........................\KEYSCAN1.H
................\........................\Last Loaded 电热恒温.DBK
................\........................\lcd1602.h
................\........................\MAIN.C
................\........................\MAIN.LST
................\........................\MAIN.OBJ
................\........................\PID.h
................\........................\SHUIWEN
................\........................\SHUIWEN.hex
................\........................\SHUIWEN.lnp
................\........................\SHUIWEN.M51
................\........................\SHUIWEN.Opt
................\........................\SHUIWEN.plg
................\........................\SHUIWEN.Uv2
................\........................\SHUIWEN_Opt.Bak
................\........................\SHUIWEN_Uv2.Bak
................\........................\STARTUP.A51
................\........................\STARTUP.LST
................\........................\STARTUP.OBJ
................\........................\XIANSHI.H
................\........................\电热恒温.DSN
................\........................\电热恒温.PWI
................\protus仿真（包括源程序）
电热恒温水壶系统

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