drivers motorola

Http://21cnbao.blog.51cto.com/109393/336263 1.1 Device Driver core layer and examples in the object-oriented programming, you can define a base class for a similar thing, specific things can inherit the functions in this base class. If the implementation of a function of the inherited object is the same as that of the base class, it can directly inherit the functions of the base class. On the contrary, it can be overloaded. This object-oriented design method greatly improves the code reusable ab

From one point of view, the role of a device driver is to provide a mechanism, not a policy. When writing drivers, programmers should pay particular attention to the following basic concept: When writing kernel code to access hardware, do not impose any specific policy on the user. Because different users have different needs, the driver should handle the problem of how to make the hardware available, and how to use the hardware problem left to the up

reached 66MHz or even 133MHz Equipped with a 32-bit data bus, and the specification already includes 64-bit extensions Platform independence as much as possible simplifies the task of adding and removing peripherals to the system PCI device is a jumper-free device that can be configured automatically during the boot phase PCI Addressing each PCI peripheral is identified by a bus number, a device number,

Excerpt from: http://blog.chinaunix.net/uid-20799298-id-99675.htmlThe original text is writing device driver in linux:a Brief tutorial.This article focuses on three examples to explain the Linux driver, so that novice quickly, from the code layer to understand what is the Linux device driver.This article is a note, in general translation of the first two parts of the article, namely the first two examples, these two examples can be successfully run correctly. File: Writing device

is the error may instead be Reported As-eproto Or-eilseq. From this we can judge that this error is related to the timeout of the USB device. Reporting this error in the Hub_port_init part of the DRIVERS/USB/CORE/HUB.C, a timeout occurred due to Usb_get_device_descriptor acquiring USB device information. This can basically determine three kinds of cases, 1, USB devices and interface problems, 2, USB core has problems, 3, USB driver have problems. W

Tags: exception TCO declaration program trace MySQL database connection URL jdkUnderstand:When a Java application connects to a database, the driver communicates with the database vendor through JDBC (jdbc is the JDK ) and the driver communicates with the database.Drivers provided by the database vendor:There are various types of databases, such as MySQL, Oracle, etc., and different databases have different drivers. So before you do anything else, fir

blocking and non-blocking IO in Linux device drivers:Blocking and non-blocking in 1.Linux device drivers Summary: http://m.blog.csdn.net/blog/dongteen/17264501Blocking and non-blocking io:http://m.blog.csdn.net/blog/dongteen/17264501 in 2.Linux device driversBlocking and non-blocking I/O in 3.Linux device driversExample: http://blog.csdn.net/wenhui_/article/details/6817659waiting queue in Linux kernel:implementation of waiting queue in 1.Linux : http:

is that the chapter is a little bit more complicated.Although the NoOp Scheduler is really simple enough to be simpler than our drivers, the 120 lines of code in 2.6.27 have amply illustrated the problem.But obviously, no matter how simple it is, as long as it exists, we take it as a liability.Here we're not going to go over and over again. Lip demonstrates what benefits, difficulties, and how to connect with the international, without using the I/O

Allocating memoryDescribes how memory is used in device drivers;How best to utilize system memory resources.Kmalloc functionThe Kmalloc memory allocation engine is a powerful tool.#include void *kmalloc (size_t size, int flags);Parameter assignment means that flags can control the behavior of Kmalloc in a variety of ways.The flag Gfp_kernel indicates that the memory allocation is performed on behalf of the process running in kernel space, which means