单片机扩展是单片机应用的重要部分，文档主要介绍单片机的片外扩展。...

它是关于单片机与温度芯片DS18B20的资料，通过单片机采集芯片DS18B20温度-It is a single-chip microcomputer with on-chip temperature DS18B20 information collected through the single-chip-chip temperature DS18B20

功能： 1、作为主机通讯采集两路下位机数据并将此数据通过8255送出（十路水位值） 并计算水头送STC板 2、采集数据为BCD码制，先转换成二进制，处理后再转换成BCD 3、通讯采用方式3，多机通讯，上位机发地址时TB8=1，其他TB8=0 下位机SM2=1，RB8=1时产生中断后使SM2=0收发数据，结束后SM2=1 在此系统中本机硬件地址要设为0-Features: 1, as the host of two-way communication acquisition of data-bit machine and send this data through 8255 (the road level 10 value) and calculate the head sent to STC board 2, for BCD code data collection system, the first converted into binary, and then deal with the conversion into BCD 3, communication using methods 3, multi-machine communications, address PC made TB8 = 1, other TB8 = 0 under the digital machine SM2 = 1, RB8 = 1 when the failure to make SM2 = 0 to send and receive data, after the end of SM2 = 1 in this system to the local hardware address set to 0

该文件是关于使用AT892051产生pwm控制的电动机的资料。-The document was produced on the use of AT892051 pwm motor control information.

freescale HC12_A64例程 -Freescale HC12_A64 routines

FE42X单相防窃电电表DEMO(编译器 AQ430 AQ430 V2.0.6.5)-FE42X single-phase防窃电meter DEMO (compiler AQ430 AQ430 V2.0.6.5)

这是费浙平在《单片机与嵌入式系统应用》上连载的六篇文章，非常经典。-Zhejiang-fee "microcontroller and embedded system applications," a series of six articles, very classic.

这是一个有关单片机C语言使用的范例，这个范例说明如何使用 Port 1 输出跑马灯 -This is a single-chip using C language examples, this example illustrates how to use the Port 1 output Marquee

这个是一个数字时钟的程序，是在iar的环境下运行的，可适用于msp430的单片机 -This is a digital clock procedures, iar environment is running under, applicable to the MSP430 microcontroller

3208点陈式显示电子时钟，有兴趣的朋友可以DIY，同时也可以提供代码参考。-Chan 3208 point display electronic clock, interested friends can DIY, but also can provide reference code.

的应用原码可以直观使用请不要将文件放在这两个目录下-Application of the original code can be intuitive to use, please do not file on these two directory