4x4键盘的程序，新思路，希望能对大家有所帮助。

整有效。中间四个字节分别代表设备的地址、指令类型、指令参数1(OPT1)和指令参数2(OPT2)。设备在对这四个字节的内容进行译码后执行相应的操作

STC89C58加18B20温度传感器构成的温度采集器程序-18B20 increases STC89C58 temperature sensor consisting of temperature acquisition program

盛方学习板单片机实验全部源码 新手宝典 -Sheng Fang experimental study single-chip all-source plate green hand book

矩阵键盘检测,用于初学单片机的人了解学习-Matrix keyboard detection for the beginner to learn to understand SCM

基于51系列单片机的一个移位显示矩阵键盘源码-51 Series single-chip based on a matrix keyboard Shift show source

stc89C51读写AT45DB041的源码，实现了数据手册中的所有命令

在做项目（工程）的时候，我们经常要用到比较多的按键，而且IO 资源紧张， 于是我们就想方设法地在别的模块中节省IO 口，好不容易挤出一两个IO 口，却 发现仍然不够用，实在没办法了就添加一个IC 来扫键。一个IC 虽然价格不高， 但对于大批量生产而且产品利润低的厂家来说，这是一笔不菲的开支! 那，我们能不能想到比较好的扫键方法：用最少的IO 口，扫最多的键？可以吗？-Doing the project (engineering), we often use the relatively large number of keys, and the IO resource constraints, so we are trying to save in another module IO ports, finally out of one or two IO ports, only to find is still not enough there is really no other way to add an IC to sweep on the keys. Although the price of an IC is not high, but low profits, high-volume production and product manufacturers, this is spending a lot of money! That, we can not think of a better scan key method: with a minimum of IO ports, scan Most of the keys? OK?

远程遥控家电，用到了串口程序，键盘程序，LCD显示程序等等，非常不错的程序。比较有参考价值。-Remote control home appliances, use a serial process, the keyboard program, LCD display program, etc., are very good procedures. Have reference value for comparison.

将演示数据先写入24C04芯片内，再将其数据逐个读出送P0口LED显示。-Data will demonstrate the first to write 24C04 chip, and then read out the data sent by P0 I LED display.

基于51单片机都 自动太阳能跟踪系统 包含源码和电路图-51 MCU-based solar tracking system automatically includes source code and schematic