周立功

在Linux的一个获取键值的程序，对于作OEM键盘很有用。-In Linux, a key procedure to obtain, for the keyboard is useful for OEM.

一个简单的b tree 实现代码，可用于缓存数据，提高查询速度-A simple realization of b tree code, can be used to cache data to improve query speed

Ep9315 arm ds12885 ep9315 ds12885时间芯片驱动程序-Ep9315 arm ds12885ep9315 ds12885 time chip driver

手机号码抽奖程序源代码-phone numbers to draw source code

周立功ARM Stellaris驱动库源程序-Week Ligong ARM Stellaris driver library source code

SDIO转UART的驱动，这个UART设备使用的GPS。-SDIO turn UART driver, the UART device uses GPS.

清华大学－电子信息工程系－实验用ARM-linux－源代码－CLOCK篇-Tsinghua University- Electronic Information Engineering- experiment with ARM-linux-source code-CLOCK articles

一个操作系统必须和作为它的基础的硬件系统紧密配合。操作系统需要使用一些只有硬件才能提供的功能。为了完整的了解 Linux ，你需要了解底层硬件的基础知识。-Must be an operating system as its hardware system based on close co-operation. Operating system only need to use some of the functions of the hardware can provide. In order to complete understanding of Linux, you need to know basic knowledge of the underlying hardware.

多线程程序作为一种多任务、并发的工作方式，有以下的优点： 　　1) 提高应用程序响应。这对图形界面的程序尤其有意义，当一个操作耗时很长时，整个系统都会等待这个操作，此时程序不会响应键盘、鼠标、菜单的操作，而使用多线程技术，将耗时长的操作（time consuming）置于一个新的线程，可以避免这种尴尬的情况。 　　2) 使多CPU系统更加有效。操作系统会保证当线程数不大于CPU数目时，不同的线程运行于不同的CPU上。 　　3) 改善程序结构。一个既长又复杂的进程可以考虑分为多个线程，成为几个独立或半独立的运行部分，这样的程序会利于理解和修改。 -multithreaded process as a multi-task, complicated by the way, has the following advantages : 1) improve application response. This graphical interface is especially meaningful, when a very long time-consuming operation, the entire system will wait for the operation, this procedure will not respond to keyboard, mouse, the menu of operations, and the use of multithreading technology, long will be time-consuming operation (time consuming) under a new thread, avoided this embarrassing situation. 2) multi-CPU system more effective. When the operating system would ensure that not more than a few threads CPU number of different threads running on different CPUs. 3) to improve program structure. A long and complex

sl811主机源代码-sl811 mainframe source code