此为18B20的温度检测以及键盘控制和液晶显示程序.好用.

完整可以对24C04,24C16A进行正常读写功能的C51代码.-Integrity can 24C04, 24C16A normal read and write function code C51.

i2c到os/2

可用于测量10000000赫兹频率范围内的方波，基于单片机8051.精度为0.01 -Can be used to measure the frequency range of 10 million Hz square wave, based on 8051 microcontroller. Accuracy 0.01

高速DDS芯片AD9851的应用程序，基于AVR128单片机最快可产生180MHZ正弦波（对PCB的要求很高！）

RS-485接口具有较强的抗干扰性，数据传输的距离较远，在一些应用中常常需要把RS-232标准的信号转换为RS-485的标准信号进传输。图中所示电路允许数据在RS-232/RS-485这两个不兼容的串行数据接口间传递。传输速度为480波特时，传输距离可达1750米。图中双RS-232收发器IC1将主机(PC)输出的RS-232电平转换为TTL电平，驱动高速RS-485收发器IC2 的输入，倒相器使IC2、IC3在受到起始位时被激活。-RS-485 trying to lay all the thoroughly bleed at the nose picking up the birthday 扰 fern cavity 强 ， Chu Huai basin cavity beat escapement for the birthday candle远Now ， Which instance, using Beckmannia中

DS18B20带CRC校验的PDF文档，里面是程序-DS18B20 with CRC checksum of the PDF document, which is a procedural

C语言、写的DS1820的程序 非常详细的注释 对51单片机的 -C language, writing the DS1820 very detailed procedures for the Notes to 51 SCM

此程序为单片机开发过程中定时芯片ds1302的控制并用lcd显示的程序，用汇编语言编写。供参考用-procedure for microcontroller development process of regular chips ds1302 control and LCD display with the procedures in assembler language. For information

本程序主要通过外部中断INT0及3.3端口读取PS2键盘值并通过LCD1602显示，键扫描码的解码通过数组方式解码，程序的解码功能主要针对数字及大小写字母和常用标点符号 硬件描述：PS2键盘的时钟线（clk）接89S51的INT0（P3.2）,数据线data接（P3.3） LCD的控制端口分别为： RS = P2^7，RW = P2^6，EP = P2^5，数据端口为P0，液晶显示偏压VL必须接 -This procedure mainly through external interrupt INT0 and 3.3 read PS2 keyboard port value through LCD1602 display, key scan code decoder way through an array of decoding, the procedure for decoding function of the major figures and upper and lower case letters and punctuation marks commonly used hardware description: PS2 keyboard clock line (clk) then 89S51 the INT0 (P3.2), data lines data access (P3.3) LCD control port, respectively: RS = P2 ^ 7, RW = P2 ^ 6, EP = P2 ^ 5, data ports for the P0, LCD bias VL must be received

at24C02读写--51单片机 已经通过验证-AT24C02 read and write- 51 single-chip has been validated