一个4X4的键盘程序设计，希望能对大家有一定的帮助

51单片机的以太网 Ethernet 源程序和原理图-51 MCU Ethernet code and Schematics

MzT35_Keil_MCS51_Bus.7z DIRVER-MzT35_Keil_MCS51_Bus.7z

单片机的7279程序。7279是一个可以带有64个按键还有六个数码管的芯片。对7279的使用可以减少对单片机的要求。-7279 SCM procedures. 7279 is a 64 keys with six LED chips. Of 7279 to reduce the use of single-chip requirements.

用 89C51单片机系统进行温度实时采集与控制是本设计的主要 内容。本设计介绍的 单片机 温度 自动控制系统的主要 内容包括：系统方案、理论分析、硬件设计、系统调试及 主要技术性能参数。 -89C51 single-chip microcomputer system with real-time acquisition and control of temperature is the main contents of the design. The introduction of the single-chip design of automatic temperature control systems include: system program, theoretical analysis, hardware design, system debugging and main technical performance parameters.

鉴于MCS-51系统只提供“二级中断嵌套”，提出扩展51系统中断优先级的纯软件方法。其利用51系统内建的中断允许寄存器IE和中断优先级寄存器IP，通过屏蔽字机制来实现；以C51的形式，给出这种扩展方法的函数库实现，为该方法的使用赋予友好、简洁的用户接口。-Given MCS-51 systems only provide "two interrupt nesting," expanded 51 priority system interruption of pure software. The use of 51 built-in system allows interruption Register IE and priority interrupt register IP, through word shielding mechanisms to achieve; C51 in the form of this expansion is the way to achieve functions, methods for the use of empowerment friendly, simple user interface.

8051C thorough application of the language (book)很好的元件库-8051C thorough application of the language (book) a very good library

键盘与显示 4*4键盘 8个数码管轮流扫描作动态显示 硬件电路需要74LS138 cd451 -Keyboard and display 4* 4 keyboard 8 digital tube rotation scanning circuit for dynamic display hardware need 74LS138 cd451

9850驱动 驱动9850产生频率 定义端口等 理解就是了-9850

简易信号发生器：有原理图，仿真图，C程序，功能比较齐全-Simple Signal Generator: A schematic diagram, simulation plans, C procedures, functions relatively complete

用与计算机的串口通信， MAX232转4-Bunches of communication that used with the computer , MAX232 change into 4