用AT89C2051实现程序A/D转换程序，用PWM模拟输出。

单片机系统设计及工程应用-雷思孝 冯育长编著 本书系统介绍了51系列单片机的基本原理和应用，从应用系统设计的角度出发，较为全面地介绍了单片机应用系统设计中的相关技术。全书共11章，内容分别为单片机系统概述、单片机硬件系统设计基础、指令系统与编程技术、中断系统与定时器应用、串行通信技术、单片机系统扩展及应用、单片机应用系统开发环境、单片机应用系统设计、系统抗干扰设计、实用外围电路设计、常用传感器。 作者总结多年来教学和科研的实践经验，为了解决读者在学习单片机技术及实际应用中的难点和疑惑，对难点进行详细描述，适当进行要点归纳，力求简洁实用，注重系统设计能力的培养，侧重设计方法和实际应用。 本书可作为工科院校电子信息、通信工程、计算机科学与技术、仪器仪表、工业自动化等相关专业单片机系统设计课程教材，以及高职高专相关专业单片机应用课程教材，对于工程技术人员及广大单片机爱好者，本书也极具参考价值。 -SCM system design and engineering applications- Xiao Feng long Elisabeth edited the book system introduced 51 Series MCU basic principles and applications, from the application system design perspective, A more comprehensive presentation of the SCM application system design related technologies. The book has 11 chapters, which were outlined SCM system, microcontroller hardware system design basis, Instruction System and programming technology, and the timer interrupt system application, serial communications technology, SCM system expansion and the application MCU application system

这是一套用C语言完成的128*64液晶屏驱动，没有设备，未验证可用性-This is a set of C language with the completion of the 128* 64 LCD screen-driven, not equipment, not to verify the availability of

AVR单片机入门及C语言高效设计实践（五） ATMEAG16L的中断系统什么是“中断”？顾名思义中断就是中断某一工作过程去处理一些与本工作过程无关或间接相关或临时发生的事件，处理完后，则继续原工作过程。比如：你在看书，电话响了，你在书上做个记号后去接电话，接完后在原记号处继续往下看书。如有多个中断发生，依优先法则，中断还具有嵌套特性。又比如：看书时，电话响了，你在书上做个记号后去接电话，你拿起电话和对方通话，这时门铃响了，你让打电话的对方稍等一下，你去开门，并在门旁与来访者交谈，谈话结束，关好门，回到电话机旁，拿起电话，继续通话，通话完毕，挂上电话，从作记号的地方继续往下看书。由于一个人不可能同时完成多项任务，因此只好采用中断方法，一件一件地做。[第一段] -AVR C language portal and efficient design practice (5) ATMEAG16L the system even interrupted Mody is "suspended"? As the name suggests is interrupted interruption of a process to deal with some of the work process unrelated or indirectly related to the temporary or , after treatment, to the original process. For example : in your reading, the phone rang, you have the book to be a mark after picking up the telephone, then after the original mark to continue down the reading. For more interruption, priority rules and the suspension characteristics also have nested. For instance : reading, the phone rang, you have the book to be a mark after pick

使用PIC芯片控制U2270读取125KHz ID卡卡号，因为所使用的PIC资源很少，此程序极为精简，包含中断曼切斯特解码和校验全过程，非常实用。-The use of PIC chip control U2270 Read 125KHz ID card number, because the use of PIC scarce resources, this program is extremely streamlined, with interruption of Manchester decoding and checking the whole process is very useful.

５１单片机开发的键盘扫描程序　希望对大家有用-Development of 51 single-chip microcomputer keyboard scanner hope useful for everyone

一个基于STC89C52的单片机程序，可以通过按键来不停发送100ms（时间可调）的脉冲，通过定时器控制-STC89C52 microcontroller-based procedures, can be sent through the button to stop 100ms (time adjustable) pulse, through the timer control

c编程高级技巧，软件高手必读-c senior programming skills, master the required reading software

示例程序下载关于单片机接上-download examples of SCM connected

C8051F32X的usb通信例程，包含C语言、驱动及上位机编程-C8051F32X the usb communications routines, including C language, and the PC-driven programming

倒计时器 A51源程序 -countdown for A51 source