本代码为本人在做一个项目时写的MSP430单片机读写FLASH芯片45DB041的源程序，包括基本通信函数，初始化函数，模式设置函数，整块FLASH读写，字节读...

由8051组成的单片机系统通常情况下，P0口分时复用作为地址、数据总线，P2口提供A15-A8即高8位地址，P3口用作第二功能，只有P1口通常用作I/0口。P1口是8位准双向口，它的每一位都可独立地定义为输入或输出，因此既可作为8位的并行I/O口，也可作为8位的输入输出端。当工作在输入方式时，对应位的锁存器必须先置1,才能正确地读到引脚上的信号,否则,执行读引脚指令时,若对应位的锁存器的值为0，读的结果永远为0。-By 8051, composed of single-chip microcomputer system under normal circumstances, P0 timeshare I reuse as address, data bus, P2 I provide A15-A8 high eight address, P3 mouth for the second function, I usually only P1 for I/0 I. P1 I was eight quasi-two-way port, it can be independent of each and every defined as input or output, it can be used as 8-bit parallel I/O port, can also be used as 8-bit input and output side. When the work in the input, the corresponding bit latch must first buy one in order to correctly read the signal pin, or pin the implementation of reading instruction, if the corresponding bit latch the value of 0, Reading the results of Forever to 0.

protel 各种常用元件库 介绍 使用方法-protel library introduced a variety of common components to use

通过ＭＣＵ采集数据并上传到ＰＣ，通过串口协议传送-Through the MCU data collection and upload to the PC, through serial transmission agreement

VB作上位机,通过跟51单片机通讯,控制家用电器电源的通断-VB for the host computer, through communications with the 51 single-chip microcomputer to control the power-off household appliances

本文从远传抄表的传输方式以及发达国家的家庭网络技术，较全面的介绍了国外远传抄表系统，对我国智能远传抄表系统新产品的研发有一定的参考价值。-This text is based on the transmission means of telemeterrecording and household network technologies of in developed countries，more overall introduction the system of telemeterrecording abroad，There must be certain reference value to the research and development of new products of intelligent telemeterrecording system.

Atmega169 usart 驱动-Atmega169usart drive

这是一个用51单片机做的记米器程序，它能统计绕卷的长度，精度比较高。--A meter-counting program produced by using 51 SCM.

LCD程序hmn 民间 搞活 才 各个-LCD HMN civil enliven the proceedings before a

ds18b20的程序，经过测试可以使用分享一下-DS18B20 procedures tested can use to share

多功能广告牌，12864液晶显示，首行滚动显示广告语，按键选择广告，预存5条广告，18B20检测温度显示，DS1302万年历显示，可调时间，具有掉电保护，串口向PC机实时传送温度、时间信息-Multi billboards, 12864 liquid crystal display, the first-line scrolling display advertising language, button select advertising, stored five advertisement, 18B20 test temperature display, DS1302 calendar display, adjustable time, with a brown-out protection, serial port to the PC, real-time delivery temperature, time information