开发DM642系统很好用的cpld程序，包含字符叠加部分

步进电机驱动器的介绍-Stepper Motor Driver presentation

flash测试代码，它主要是针对SST39VF1601进行测试，主控制器是44B0。-flash test code, it is mainly directed against SST39VF1601 test, the main controller is 44B0.

本系统分电压测量和信号产生输出两大部分，电压测量部分以模拟电路为主，配合放大模块、A/D转化模块、显示模块；通过凌阳单片机进行数据处理，在误差允许范围内显示测量电压值。信号产生以直接数字式频率合成器为核心，经过AT89S52对DDS芯片内部进行控制，使之输出标准正弦波形，利用编程实现频率预置、步进，达到电压输出频率的可调节步进。通过调试与测量完成了题目的基本部分和全部发挥部分的要求并有自己的创新。-Voltage measurement points of the system and the output of two major signals, voltage measurement circuitry to simulate the main part, with the amplification module, A/D conversion module, display module through Sunplus Single-chip data processing, in the range of error allowed shows the value of measuring voltage. Signal generated by direct digital frequency synthesizer for the core of the DDS chip AT89S52 after the internal control standards so that the output sine wave shape, frequency of use of pre-programming, step to the output voltage adjustable frequency step. Debugging and measurement, through the completion of the basic part of the topic and all the requirements to play a part and have their own innovation.

我有8051个做RTC，我得到的值从DS1307和显示时间和日期。这个小项目采用I2C protocol.just你连DS1307 8051 SCL，SDA，VCC，GND你会得到准确的值。

本人用STC12LE5202AD做过的太阳能草坪灯LED充放电控制器，具有浮充，过充，过放，光控+时控等功能， 实际应用良好，希望大家多多指导。-I am done with STC12LE5202AD solar lawn lamp LED charge and discharge controller, with a float, over charge, over discharge, light control+ time control and other functions, the practical application of good, I hope you lot of guidance.

yampp mp3 reference

s3c2440的LCD驱动程序，640x480，希望对大家有帮助！-S3C2440 the LCD driver, 640x480, hope everyone has to help!

PS2Key.c键盘扫描+液晶1602显示-PS2Key.c keyboard scan+ LCD display 1602

实现arm文件系统，可以很好的处理和编辑一些文件-Realize arm file system, can be a very good deal and edit documents

使用protel99se开发的单片机电路板，希望有助于各位电路板开发设计的学习-Use protel99se developed microcontroller circuit boards, circuit board you wish to contribute to development and design of learning