用8051开发usb的程序练习，对于初学者来说可以有需多的帮助

A simple preoteus based design to display the characters typed int the keyboard into LCD using UART of 8051.Plz make sure that TTL to RS232 is inserted in between the microcontroller and virtual terminal which is not shown in the design.

嵌入式LInux下C编程。详细具体介绍了linux系统编程的方方面面。请多下载-Embedded C programming under LInux. Detailed and specific description of all aspects of linux system programming. Like him to download

红色飓风原理图，有兴趣的人可以下来看看，原理图还是比较详细的！-Red Hurricane schematic, interested people can look down, or a more detailed schematic of the!

fft 变换C程序 不错的-fft transform good C program

本程序实现的是液晶显示-this program is LCD

利用定时器产生PWM，控制LED灯由亮到灭，由灭到亮逐步变化，也就是调光现象-The use of timers generate PWM, control the LED light from bright to poverty, from the gradual eradication of the light changes, the phenomenon that is dimming

秒表最大计时时间为3分钟59秒。系统设置2个功能键，控制秒表启停。秒表启动时从00秒开始计数，2位的七段数码管显示变化的秒数（以十进制形式），计数范围为00-59秒。停止键按下，系统维持显示计时的最后值。开发板的2个数码管作为秒表的秒显示，秒表的分钟显示功能由2个LED灯（LD3和LD4）按二进制形式表示，即LD4为最低位，LD3为最高位，当2个全亮时表示3分钟。开发板中的两个按键Key2为开始键，Key3为停止键。

RTOS 51代码-RTOS code

基于GPS和GSM的车辆安全和事故警报系统

扫描键盘，包括原理图和程序，汇编和c的程序，方便大家使用-Scanning the keyboard, including schematics and procedures, compile and c the procedures for the use of U.S.