8051 Serial I/O Routines Ring buffered, interrupt

keil C51 Switch事例-examples Switch

串行写控制字 设置串口工作方式 将控制字写入AD9850-Serial control words written work will be set up serial control words written into the AD9850

单片机实现DES的程序包-DES realize single-chip package

用8253-8255编写的定时响铃程序 可以定时两个时间点，很经典的程序-spent 8253-8255 prepared by the regular beep procedures regular two points in time, classic procedures

C51 TIMER 0的使用 Timer_0_mode_1_timer_gate_hard-C51 TIMER 0 use Timer_0_mode_1_timer_gate_hard

发射芯片nrf24e1的控制字配置，发射子程序 与单片机的通讯-Launch control chip nRF24E1 word configuration, launch communications subroutine with SCM

1602A液晶屏60分钟循环秒表-1602A LCD screen 60-minute cycle stopwatch

随着精准农业的发展，农业种植和农业研究人员需要一种手持式NDVI测量仪，以便对农作物长势进行定量测量。本文讨论了一种手持式NDVI测量仪的完整设计过程，详细论述了设计原理，并给出了详尽的单片机程序、设计电路原理图及PCB图。该NDVI测量仪采用太阳光作为光源，光电探测器采用滤光片和光敏二极管实现，用AT89C51单片机控制。其具有结构简单、成本低、轻便、低功耗的特点。-With the development of precision agriculture and farming, and agricultural researchers need a handheld NDVI measuring instrument, in order to crop growth for quantitative measurement. This paper discusses a handheld meter NDVI the integrity of the design process, discussed in detail the design principles, and gives a detailed SCM procedures, circuit schematics and PCB plans. The NDVI measuring instrument used sunlight as a light source, photodetector using filters and photodiode realized, with AT89C51 control. Its structure is simple, low cost, lightweight, low-power characteristics.

52单片机的ucos移植程序，需要外加ram。比较通用。-52 Singlechip uCOS transplantation procedures, the need for additional ram. More generic.

AT89C2051中文手册，AT89C2051是非常便宜的51系列单片机，简单好用。-AT89C2051 Chinese Manual, AT89C2051 is a very cheap 51 series microcontroller, easy-to-use.