a PWM duty cycle output procedures EM78P458 applications through debugging

此程序为AD9850（DDS）直接数字频率合成器C语言源码。用125M的有源晶振，频率无失真输出可达到40M。该程序包括FYD12864LCD显示程序加4X4矩阵键盘扫描，可步进1M，1K，和任意频率输入。及相位设置。-This procedure for the AD9850 (DDS) Direct Digital Frequency Synthesizer C language source code. With 125M active crystal, the frequency output can be achieved without distortion 40M. The process includes the display program FYD12864LCD plus 4X4 matrix keyboard scanning, may be stepping 1M, 1K, and arbitrary frequency input. And phase settings.

基于Ramtron公司的VRS51L3074高性能8位单片机的MP3(VS1003)驱动程序,程序在Keil环境编译,程序内自带一段15K左右的MP3文件,可以直接播放测试.-Based on Ramtron" s VRS51L3074 high-performance 8-bit microcontroller MP3 (VS1003) drivers, programs, the environment in the Keil compiler, the program comes with a 15K or so inside the MP3 files can play test.

液晶19264驱动程序。显示一串字符。用AT8515L控制，经过调试成功-19,264 LCD driver. Showed a bunch of characters. With AT8515L control, after successful testing

IT MSP430开发比较有用的参考书籍，关于MSP430（单片机）的体系结构和硬件介绍的-IT MSP430 development more useful reference books, on the MSP430 (SCM) architecture and hardware on the

8051 VARIOUS UTILITY FUNCTIONSUTIL_ADCAD - Add Acc to DPTR, sets CYUTIL_ADCBAD - Add B/A to DPTR, sets CYUTIL_SUBBAD-8051 VARIOUS UTILITY FUNCTIONSUTIL_ADCAD- Add Acc to DPTR, sets CYUTIL_ADCBAD- Add B/A to DPTR, sets CYUTIL_SUBBAD

线性光耦合器的简单介绍。-linear optocoupler brief.

c51+ds1302+ds18b20+无线遥控。调了我半个二周时间 终于调试通了，能够正常运行了-c51+ ds1302+ ds18b20+ wireless remote control. Those were the two weeks I am half the time had finally debugging, to the normal operation of the

modbus 通讯程序 物理层rs-485-Modbus communication procedures rs-485 physical layer

用proteus进行的开发，和刚上传的c文件一起用-Proteus carried out with development, and the newly uploaded file with c

ALTERADE2开发板一个网络芯片DM9000A的应用范例-Development board ALTERADE2 a network chip DM9000A Application Example