51 MCU after cutting TCP/IP protocol, the compiler environment, Keil C51.

提供了LED点阵显示的Proteus仿真电路，和汇编代码。-LED dot matrix display provides a simulation circuit of the Proteus, and assembly code.

经过一段时间的使用，上次的硬盘MP3播放器增加了USB下载文件功能； 汉字LCD显示功能；子文件夹功能等。并对软件做了一些修改。并将 硬件电路图画出来了。由于做得仓促，难免有不妥之处，请大家谅解， 欢迎指出错误。谢谢。-After a period of use, the last of the hard disk MP3 player, an increase of USB download files function characters LCD display Subfolders functions. And the software to do some modifications. Hardware circuit and the pictures came out. As a result of doing a rush, inevitably something wrong with the U.S. understanding, please welcome to point out the error.谢谢.

程控增益线性脉冲放大器的设计。 设计了一种新型程控增益线性脉冲放大器。采用准高斯CR2RC2CR 成形电路结构,使用非易失性数字电位器和精密运放,使电路结构大大简化,抗干扰能力强,增益多级连续变化平稳,且具有温漂低、脉冲线性好等特点-Programmable gain linear pulse amplifier design. Design a new type of programmable gain linear pulse amplifier. Using quasi-Gaussian CR2RC2CR forming circuit structure, the use of non-volatile digital potentiometers and precision operational amplifier, so that greatly simplify the circuit structure, anti-jamming, multi-stage continuously variable gain stable, and has a low drift, pulse linear good characteristics

C51单片机的非常好的实例，播放音乐，好好学习-C51 MCU very good example of music, to learn

基于51单片机的U盘型MP3设计（含C语言程序，原理图）-51 MCU-based U-disk-based MP3 design (including C language program, schematic diagram)

c51的一个字节颠倒程序-byte of a reversal procedure

89c52串口通信，ASM文件格式，采用wave编写-89C52 Serial Communications, ASM file format used to prepare wave

C到ASM，ASM到C到Keil C

实现AD转换tlc549芯片的驱动，建模力量转化为数字量-TLC549 chip AD conversion realize the driving, modeling forces into digital

c51语言入门教程.适合于初学者使用,通俗易懂-C51 Language Tutorial. suitable for beginners to use, easy to understand