Recommend a book on embedded entry: Embedded system design (Chongqing University Press, author Pens). I recently also took a good look at some of the content, combined with our previous classes to learn some embedded knowledge and the previous operating system and the composition of the principle, with the following summary, is a time for this book to learn the k
The composition of an embedded Linux system is a typical embedded Linux system. According to the storage space, the Boot zone, kernel zone, and file system zone are usually divided. The Boot Loader and system parameters are stored in the Boot zone, the kernel area stores customized Linux kernel www.2cto.com file systems for specific
Continue to work hard and start to learn Chapter 2: Basic concepts.For Embedded Linux, you need to be familiar with the Linux system first, there are many, there will be more Linux systems, so do not limit with a single type. At present, the three largest are red.Hat, Novell (sles) and ubuntu. If we select the popular Linux version as the development platform (Windows or UNIX can be used as the workstation)
status.
Resources on PCs are not rich, so this problem is not so obvious. However, because embedded systems are resource-constrained systems, memory is a very precious resource, in addition, the embedded system is limited by a single resource, and the memory management algorithm is generally relatively simple. Therefo
From Roger's research birthday, embedded systems (SOC)
Embedded Systems (SOC) have been widely used in recent years. Many people have been studying and analyzing this field, however, most of the users are not allowed to join us.
Before using SOC, we must first consider a question: why and why are we building SOC fu
Currently, storage modules are indispensable in the development and design of various embedded systems. Nor and NAND are two major non-loss flash technologies on the market.
Nor-flash memory has a small capacity and a low write speed. However, due to its fast random reading speed, it is often used in the storage of program code in embedded
connectors, compilers, and other tools for target files and files.
(2) GCC
GCC (GNU Compiler Collection) is an advanced language compiler in Linux. It not only supports C/C ++ compilation, but also supports programming languages such as Fortran, Java, and Ada.
(3) glibc
Provides C libraries for system calls and basic functions, such as open, malloc, and printf. All C Programs on Linux must be connected to the glibc library during compilation. If it is a dynamically connected program, you also n
The linux basics needed for Embedded Systems-general Linux technology-Linux programming and kernel information. The following is a detailed description. I just got started with embedded systems and watched five videos today. What makes me feel the most inadequate is my lack of linux System Management Learning and some
only tool. If we are only limited to using Linux to develop our own computer software industry, there is no future.
The reason why Linux systems are favored by many vendors is that they provide low-cost, cost-effective, and even free development platforms for computer software vendors. But Linux is not perfect. InOne disadvantage of running Linux on an embedded system is that the Linux system needs to add
Embedded systems have increasingly abundant hardware resources, represented by the popular ARM core. Arm's core has already occupied the industry, with more than half of the consumption field. Its development momentum is still soaring and is moving towards desktop processors. The performance ratio of Embedded ARM chip is high. At present, the ARM chip of Cortex-A
Linux Embedded system running time is unstable-Linux general technology-Linux technology and application information, the following is a detailed description. The running time of Linux embedded systems is unstable.
An embedded linux system created using busybox + 2.6.32.13 has a single processing process and a singl
In Linux embedded systems, we can write GPRS scripts. The content involves PPP. In this article, we will explain how to perform ppp dialing on the Liod platform to implement GPRS internet access. First, let's take a look at the hardware platform: yidao Liod platform is based on PXA270 ). Operating System: Embedded Linux.
Step 1: If the kernel does not support ppp
Dynamic Power Management Technology for Embedded Linux-general Linux technology-Linux programming and kernel information. For details, see the following.
Introduction
How to effectively manage embedded systems, especially the power consumption of mobile terminals, is a very valuable topic. Dynamic Power Management DPM (Management) technology provides an operati
easy to install, easy to use and manage, with high reliability and good scalability.
Features of NetDrive Devices
Easy to install, use, and manage: NetDrive devices can be used when connected to the user's network without installing any server software. Beginners can use NetDrive devices without configuration, advanced users can use the internal tools provided by NetDrive for convenient remote configuration and management. No need to turn off the network for installation and uninstallatio
Http://blog.sina.com.cn/s/blog_5f8665e701016le6.html
In LINUX embedded systems, we often use USB flash drives and SD card mounting. It is very difficult to manually mount or detach each time. We can use the following methods to automatically mount or detach USB flash drives and SD cards.This requires mdev.The procedure is as follows:1. Add the following statement to/etc/init. d/RSC:Echo/sbin/mdev>/proc/sys/
Linux Kernel Development and Learning Guide for Embedded Systems-Linux general technology-Linux programming and kernel information. For details, see the following.
The following figure is taken from instructor Wang honghui's Guide to Linux kernel development in embedded systems (ARM platform ).
(400) {this. resized =
the length of the interrupt function. The secondary clock can be used as a precise latency mechanism (such as MS-level latency. The initialization program first calls the sysauxclkrateset () function to set the auxiliary clock interruption period to 1 ms (generally in contig. in the hfile, the interrupt frequency is limited between aux_clk_rate_min and aux_clk_rate_max. If necessary, you can modify the macro definition), and then use ysauxclkconneet ()? Connect the user processing function to t
hand-written C code, which is annotated with the most original compilation method, and then gradually simplified and optimized.I have probably figured out the mechanism of malloc. The key point is to initialize it and use _ heap_limit._ Heap_limit is compiled into flash as a constant and cannot be dynamically modified in the memory.There is no way, so you have to write code in bytes to replace it to initialize the entire heap.The initialization code I wrote is as follows:The attached malloc/fre
1. PrefaceConfiguring and compiling an appropriate GNU Toolchain is relatively complex and requires fine-grained operations, including the dependencies you need on different repositories, their respective tasks, and a better understanding of the different versions of the repositories, which is a tedious task.2. Some terms and names that need to be understood before making1) Build: The compilation system that you use to compile your toolchain.2) Host: The cross-compiler tool chain runs on the hos
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