microcontroller interface expansion examples

自己在keil51中用C实现了一个电子钢琴展览项目，cpu用P89V51RD2，完全自己写的代码-Keil51 with C in the realization of an electronic piano exhibitions, cpu use P89V51RD2, completely write their own code. .

一个用keil 51c实现的单片机系统程序，实现led显示和其他一些模块的控制-Using keil 51c realize a single-chip microcomputer system of procedures, led display and realize a number of other control modules

里面是的例子和怎么运用，对初学者很有用。代码全部通过-which is the use of examples and how, very useful for beginners. Code passed

Simple 8 bit ALU which subs, adds, ands, ors, nots, ...

用51单片机控制温湿传感器dht11的程序 c语言编写-With 51 single-chip microcomputer to control temperature and humidity sensors dht11 procedures c language

AT89S51learning 经典的单片机资料 入门级资料 易学全面-Single-chip data AT89S51learning classic entry-level information to learn the full

用语言编的小车循迹运动程序，采用凌阳061单片机控制器，在电子应用中功能强大！-Language provision of car movement tracking procedures, the use of single-chip controller 061 Sunplus electronic applications powerful!

一线制通讯 communication-communications line communication system