由于C8051f为比较新的单片机，网上的例子比较少，本人研究了芯片手册，以（P2.5端口作为模拟输入），进行了编写（编写环境KEIL C）。-Because C8051f for the relatively new single-chip, on-line examples of relatively small, I studied the manual chip to (P2.5 port as an analog input), were prepared (the preparatio