直流电机速度测量与调节，通过设置不同的按钮来控制奠基的转速，而且显示在数码管上

使用GPTC6604做的一个录放音DEMO，数据存储在外部SPI FLASH-GPTC6604 make use of an audio recording DEMO, data stored in the external SPI FLASH

单片机串口通信模板，Keil工程打包，包括两种单片机8051和C8051F020. 有多机通信协议，数据格式为“起始码+本机地址+数据”，模板中已建立接收数据、命令处理、数据发送等流程，极大地方便了串口通信的开发。-Single-chip serial communication templates, Keil engineering package, including two single-chip 8051 and C8051F020. How machine communication protocols, data format for the

单片机播放音乐 通过控制高低电平让蜂鸣器发出不同的声音 做相应的延时实现节拍 开发环境是keil-SCM music by controlling the high-low so that the buzzer sounds different delay accordingly to achieve the beat

一种比较好用得PWM控制芯片，希望对您有所帮助。-Was a relatively easy to use PWM control chip, want to help you.

这是本人学习avr的一点成果吧{ 硬件mega8l，8个led共阳极接到PORTD。3位拨码开关接到PINB2,PINB1,PINB0,选择显示内容，PINC4接方向开关，使得正反向摇动都显示正向字，每次显示4个8X8点阵汉字（自己编制的），内附：原理图。实物图片，给有兴趣的朋友-This is my point to learn the outcome of avr bar (hardware mega8l, 8 Ge led a total of anode received PORTD. 3 DIP switches received PINB2, PINB1, PINB0, choose to display the content, PINC4 then switch the direction of making the pros and cons to the rock show that positive words, each show four 8X8 dot matrix characters (self-compiled), the enclosing : Principle diagram. Physical picture, to interested friends

Keil C51 上51系列单片机优化的CRC－8 算法。可以自己改其他算式的，包含字节查表，半字节查表，bit计算。很难得的哦。-Keil C51 on the 51 computers optimized CRC-8 algorithm. Other formula can do it ourselves, and look-up table contains the byte, half-byte look-up table, bit computing. Hard to come by Oh.

T9 Text Input You can use this source code for input T9 Text Input(English)

利用单片机普通I/0口进行模拟IIC通信，从而实现24c02读写操作-The use of ordinary single-chip I/0 I mock IIC communication, reading and writing operation in order to realize 24C02

RTC芯片，ds1302的芯片驱动程序，-RTC chip, ds1302 chip driver

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