The sixth issue of SRTP

LPC2103,GPIO端口编译程序，很好用，IAR环境下-LPC2103, GPIO port compiler, very good use, IAR environment

PIC18F4550_USB开发原代码，可以给需要用单片机开发USB通信使用参考-PIC18F4550_USB development of the original code, can require the development of USB communication using single-chip reference

本文件包括葡丰概率实验测定pi的方法介绍和matlab实现方法，简单易用。-This document includes the experimental determination of the probability of Portugal Fung pi method matlab introduction and realization of methods, easy to use.

关于MCU的调度器设计办法,在小型多任务系统中非常有效,如果大家想了解非常全面的内容可以参考-On the MCU scheduling design approach, in a small multi-mission system very effective, if the U.S. would like to know can be very comprehensive reference

freescale MCF5485EVB开发板上中断操作示例，利用一个timer产生中断，另外3个timer作为GPIO，使3g个LED每隔1秒钟轮换亮一次。-freescale MCF5485EVB interrupt the operational example of the development board, using a timer generate an interrupt, another three timer as a GPIO, so 3g a LED light at one-second rotation time.

本系统采用MSC-51系列单片机ATSC51和可编程并行I/O接口芯片8255A为中心器件来设计交通灯控制器，实现了能根据实际车流量通过8051芯片的P1口设置红、绿灯燃亮时间的功能；红绿灯循环点亮，倒计时剩5秒时黄灯闪烁警示（交通灯信号通过PA口输出，显示时间直接通过8255的PC口输出至双位数码管）；车辆闯红灯报警；绿灯时间可检测车流量并可通过双位数码管显示。本系统实用性强、操作简单、扩展功能强。 -The system uses MSC-51 series single-chip ATSC51 and programmable parallel I/O interface chip 8255A-centric device designed to control traffic lights, can be achieved in accordance with the actual traffic flow through the P1 port 8051 chip set red, green fuel Liang function of time traffic light cycle, the countdown five seconds left when the yellow light flashing warning (traffic lights through the PA output signal indicates the time directly through the PC port output 8255 to double-digits) vehicle alarm闯红灯 green time traffic flow can be detected through a double-digital display. The system practical, simple and strong extensions.

51单片机实现经过裁剪的TCP/IP协议,编译环境Keil C51.-51 MCU after cutting TCP/IP protocol, the compiler environment, Keil C51.

在C8051F930单片机上，利用端口匹配和PCA实现按键的长按、短按功能。-In the C8051F930 microcontroller, using the port matching and PCA to achieve a long button press, short press functions.

lcd12864不带字库 实现画线 画点 正弦曲线 很好的例子 绝对不后悔-lcd12864 without drawing a line drawing point font to achieve a good example of the sine curve is absolutely no regret

51开发板源程序,74HC595驱动显示程序.在该模块中，共有4位LED，采用74HC595驱动显示.-51 Development Board source, Bit-driven display program. In this module, A total of four LED, using 74 HC595-driven show.