Linux

Information about man serial ports in Linux, http://www.9linux.com/tcgetattr.html in the following link Termios, tcgetattr, train, train, tcdrain, tcflush, tcflow, cfmakeraw, cfgetospeed, cfgetispeed, cfsetispeed, cfsetospeed, cfsetspeed-these

IOCTL is one of the functions popular among the masses. Here, I will take a few notes and sort out the code I wrote below.   Main. c # Include # include # include # include # include # include # include ".. /ioctl_c.h " gpio_data_s

The audio sampling rate is generally determined by the hardware, but some operating system kernels only provide the maximum fixed sampling rate, for example, the maximum is 16 kHz, in this way, we need to use software simulation to increase the

Next to the previous article Write the driver of the character device. gpio is general purpose input output.Gpio (General Input/Output) meaning, here I use the core board of the Development Board is Samsung's S3C2440, very popular board, I believe

I studied driver development under fedora, so I wanted to use a standard Linux kernel, so I tried to build multiple kernels on fedora. After one day of trying yesterday, I finally succeeded. The process is not complex. Here, we will give a summary,

[Disclaimer: All Rights Reserved. You are welcome to reprint it. Do not use it for commercial purposes. Contact Email: feixiaoxing @ 163.com] We wrote a simple character device last time, but it involves less content. There are only two functions:

I. functions: Compile a library to implement the timer function. It can provide users with the timer used multiple times in the same process. II. Implementation # Include # include # include # include # include # include # include #

These days, after reviewing the Linux kernel, I thought about the Linux kernel, but I heard many friends say that they have never seen the Linux kernel. I think it is not easy. Then I collected information on the Internet, let's take a look at all

1. NFS sharing method 1.1, applicable scope File Sharing between Linux systems and cross-compiling environment debugging between Linux and Development Board. 1.2 steps: 1.2.1 Installation $: APT-Get install nfs-kernel-Server 1.2.2 configure the

Linux network stack AnalysisFrom socket to Device Driver Document options

Since the development environment needs to be performed on the linux-2.6 kernel, I was prepared to upgrade the Linux system on my virtual machine. I didn't expect it to take two days to install the system repeatedly ~~), Finally, the Linux system is

If you are a Linux kernel developer, you will find that you often need to encode or optimize the code path for features highly relevant to the architecture. You may execute these tasks by inserting assembly language instructions into the middle of

Virtual Machine redhat9 linux2.4 kernel upgradedLinux2.6 Preparations: 1. Go to the next Linux 2.6Kernel! Http://www.kernel.org; 2.install A modules-init-tools-3.0.tar.gz toolkit. Because the 2.4.x modutils toolkit is no longer compatible with the

// Positve. C // applicable to both TCP and UDP # include # Include # Include # Include # Include # Include Void error (INT status, int err, char * FMT ,...) {va_list AP; va_start (AP, FMT);

The following information is returned: 1. The 4G linear space of a process is divided into three parts: process space (0-3g) and kernel direct ing space (3g-high_memory) kernel dynamic ing space (vmalloc_start-vmalloc_end) 2. Use the same page

  # Include # Include # Include # Include # Include # Include # Include # Include Void process_client (INT s ){ Char buff [128];Int RC, maxfd;While (fgets (buff, sizeof (buff), stdin )! = NULL ){Write (S, buff, strlen (buff ));Rc = read (S, buff,

Like windows, Linux also has a static/dynamic link library. The following describes how to create and use it: Suppose there are the following files:The header file string. h declares the prototype of the relevant function. The content is as

In Xiao Wu's eyes, the library file is a resource file and there is nothing difficult to understand. But if you really want to go deeper: "What is the difference between dynamic and static Link Libraries ?", "How to create a dynamic link library ?",

Linux2.6 kernel compiled successfully 1) required tools: Module tool: modutils-2.4.21-23.src.rpm // Load the module. It does not need to be compiled independently before 2.4. // Module storage location:/lib/modules/kernel version

Like SPI, after learning about the protocol, let's take a look at some I2C data structures in Linux kernel. In include/Linux/I2C. h The data structures are as follows: struct i2c_msg;struct i2c_algorithm;struct i2c_adapter;struct i2c_client;struct