AVR Programme is a SPI Example

将键盘发回的数据放到一个缓冲区里（数组），当按键结束后发生内部中断来处理所按的按键-returned to the keyboard data in a buffer (the array), when the button after internal interruption to processing by the key

文章借助系统模型，阐明了GSM模块收发短信的基本概念以及串口控制SMS的基本原理。详细介绍了单片机控制GSM模块工作的软件实现过程，对对怎样用单片机控制GSM模块收发短信进行了探讨，也对程序设计的主体思想作了较为细致的分析。-article with the system model, a GSM transceiver module SMS the basic concepts and serial control of the basic tenets of SMS. Details of the MCU control of the GSM module software process of how to use SCM control GSM transceiver module for the SMS study and design of the main procedures were thinking more detailed analysis.

普通有刷直流电机PWM闭环控制C51完整源程序-Brush DC Motor has ordinary PWM closed-loop control C51 complete source

此为按键部分的,读取按键值是否有按键判断部分函数-this as part of the button, reading keys value judgment whether some function keys

8通道自动温度检测系统仿真，包含源码，很好的学习资料-8-channel automatic temperature detection system simulation, including source code, a very good learning materials

热电偶、热电阻对照查询 阻值和温度自动转换程序-Thermocouple, thermal resistance and temperature resistance control automatic query conversion process

用51单片机的PWM实现DA -PWM using 51 single chip realize DA

单片机的编译工具 强烈推荐使用-SCM build tools strongly recommended!

本系统采用MSC-51系列单片机ATSC51和可编程并行I/O接口芯片8255A为中心器件来设计交通灯控制器，实现了能根据实际车流量通过8051芯片的P1口设置红、绿灯燃亮时间的功能；红绿灯循环点亮，倒计时剩5秒时黄灯闪烁警示（交通灯信号通过PA口输出，显示时间直接通过8255的PC口输出至双位数码管）；车辆闯红灯报警；绿灯时间可检测车流量并可通过双位数码管显示。本系统实用性强、操作简单、扩展功能强。 -The system uses MSC-51 series single-chip ATSC51 and programmable parallel I/O interface chip 8255A-centric device designed to control traffic lights, can be achieved in accordance with the actual traffic flow through the P1 port 8051 chip set red, green fuel Liang function of time traffic light cycle, the countdown five seconds left when the yellow light flashing warning (traffic lights through the PA output signal indicates the time directly through the PC port output 8255 to double-digits) vehicle alarm闯红灯 green time traffic flow can be detected through a double-digital display. The system practical, simple and strong extensions.

LCD7920汉字液晶操作程序，已经在产品使用中，-LCD7920 LCD characters operational procedures, already in use in the product,