51单片机的软件延时，在12MHZ下的多种延时程序-51 SCM software delay, at 12MHZ procedures under a variety of delay

基于51单片机的带时间显示和紧急控制的交通灯的设计。 此程序在硬件上调试通，用定时器1延时，外部中断0接紧急控制，R0为100MS延时常数，R2为状态延时常数，8279控制数码管显示时间,用P1口控制双色灯-With 51 single-chip based on the time display and the emergency control of traffic lights design. On this process in hardware debugging pass, w

用89C51串行口外接CD4094移位寄存器扩展8位并行口，8位并行口的每位都接一个发光二极管，要求发光二极管从左到右以一定延迟轮流显示，并不断循环。-Using 89C51 external serial port expansion CD4094 shift register 8-bit parallel port, 8-bit parallel port of each one, all light-emitting diodes, light emitting diodes requir

51 单片机的延时程序.现成可用,还有详细的讲解,大家可以参考参考.-51 single-chip delay procedures. Ready-to-use, as well as in detail, we can refer to the reference.

51单片机上可运行的键盘检测功能程序，查表、延时等。-Can run on 51 single-chip the keyboard detection program, a look-up table, and delay.