AVR单片机入门及C语言高效设计实践(13)源程序码

此程序是利用51单片机，控制蜂鸣器接口高低电平，让其发出歌声。-This procedure is the use of 51 single-chip microcomputer to control the buzzer interface high-low, so the issue of voice.

这是关于按键显示的基本程序，主芯片仍是51单片机-This is on the button to display the basic procedures, main chip is still the single-chip 51

GPL162001 I2C功能演示程序

本系统主要用于旅游景点记录游客人数，并限制旅客的流量。采用红外传感器通过检测人体红外并对通过人数进行计数，通过红外对管将检测到的数据发送至单片机，单片机处理后送至数码管显示，数码管显示的数据即为通过的人数，并通过设定值限制旅客数量。当游客超量是系统将给出相应的提示，禁止游客再进入。以更好的保护旅游景点的生态环境。-This system is mainly used for tourist attractions recording the number of visitors and limit the flow of tourists. Use of infrared sensors by detecting the human body by infrared and number of people count on the tube will be detected by infrared the data sent to the MCU, MCU after treatment sent to the digital LED display, digital LED display of the data shall be the number of through and through setting limits the number of passengers. When the visitors over-the system will give the appropriate prompts to prohibit visitors from re-entering. To better protect the tourist attractions of the ecological environment.

学习KEIL C51编程可参考的源码，从简单到复杂-????KEIL C51 ?喑炭??慰嫉脑

CMOS图像传感器OV7620在点钞机人民币号码识别记录系统中的应用-CMOS image sensor OV7620 yuan in cash registers record number recognition system

串行通信程序，发送不是用中断方式，接收用中断方式，适用于程序的调试，液晶显示用的是1602-Serial communication program, sending instead of interrupt mode, receive mode using interrupted for Debugging, liquid crystal display using 1602

320x240图形液晶驱动程序。经验证可以使用-320x240 graphic LCD driver. Certified can use the

单片机发声实例,给需要的朋友-SCM audible example, to a friend in need

AT89C2051中文手册，AT89C2051是非常便宜的51系列单片机，简单好用。-AT89C2051 Chinese Manual, AT89C2051 is a very cheap 51 series microcontroller, easy-to-use.