Its 51 instances in protues simulation, there protues schematics, original program, is a magic weapon for beginners.

20130820proteus-h\2013-8-12提交-proteus辅助的单片机原理实践-源程序\lab2_10\keil\STARTUP.A51
.................\................................................\.......\....\串口
.................\................................................\.......\....\串口.c
.................\................................................\.......\....\串口.hex
.................\................................................\.......\....\串口.lnp
.................\................................................\.......\....\串口.LST
.................\................................................\.......\....\串口.M51
.................\................................................\.......\....\串口.OBJ
.................\................................................\.......\....\串口.plg
.................\................................................\.......\....\串口.uvopt
.................\................................................\.......\....\串口.uvproj
.................\................................................\.......\....\串口_uvopt.bak
.................\................................................\.......\....\串口_uvproj.bak
.................\................................................\.......\Last Loaded 串口.DBK
.................\................................................\.......\串口.DSN
.................\................................................\.......\串口.PWI
.................\................................................\......1\keil\Last Loaded MAIN.DBK
.................\................................................\.......\....\MAIN.PWI
.................\................................................\.......\....\STARTUP.A51
.................\................................................\.......\....\行列式键盘
.................\................................................\.......\....\行列式键盘.c
.................\................................................\.......\....\行列式键盘.hex
.................\................................................\.......\....\行列式键盘.lnp
.................\................................................\.......\....\行列式键盘.LST
.................\................................................\.......\....\行列式键盘.M51
.................\................................................\.......\....\行列式键盘.OBJ
.................\................................................\.......\....\行列式键盘.plg
.................\................................................\.......\....\行列式键盘.PWI
.................\................................................\.......\....\行列式键盘.uvopt
.................\................................................\.......\....\行列式键盘.uvproj
.................\................................................\.......\....\行列式键盘_uvopt.bak
.................\................................................\.......\....\行列式键盘_uvproj.bak
.................\................................................\.......\Last Loaded 行列式键盘.DBK
.................\................................................\.......\行列式键盘.DSN
.................\................................................\.......\行列式键盘.PWI
.................\................................................\......2\图形液晶12864\keil\STARTUP.A51
.................\................................................\.......\.............\....\字符液晶12864
.................\................................................\.......\.............\....\字符液晶12864.c
.................\................................................\.......\.............\....\字符液晶12864.hex
.................\................................................\.......\.............\....\字符液晶12864.lnp
.................\................................................\.......\.............\....\字符液晶12864.LST
.................\................................................\.......\.............\....\字符液晶12864.M51
.................\................................................\......

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