本程序实现了超市收银台利用钱箱存储现金，通过向串口发送“Chr＄(27)；Chr＄(112)；Chr＄(0)；Chr＄(5)；Chr＄(225)”打开钱箱。-This program, the supermarket checkout counter cash box store cash, to the serial port to send Chr $ (27) Chr $ (112) Chr $ (0) Chr $ (5) Chr $ (225) to open the money

Asychorons counter program

this is a program counter

交通信号灯的软件设计，通过程序控制89C51单片机的定时器/计数器实现交通指示功能-Traffic signal software design, implementation, program control traffic indicator 89C51 microcontroller timer/counter