1 Types of memory 2 Characteristics…

1 main.c #include "led.h" #define BASE_ADDRESS (volatile datum *) 0x10000000 #define NUM_BYTES 0x10000 /********************************************************************** * * Function: main() * * Description: Test the second 64 KB bank of SR…

http://lwip.wikia.com/wiki/Lwipopts.h Memory management (RAM usage) /** * MEM_LIBC_MALLOC==1: Use malloc/free/realloc provided by your C-library * instead of the lwip internal allocator. Can save code size if you * already use it. */ #ifndef MEM_LIBC…

DMA部分我用到的相对简单,当然,可能这是新东西,我暂时还用不到它的复杂功能吧.下面用问答的形式表达我的思路. DMA有什么用? 直接存储器存取用来提供在外设和存储器之间或者存储器和存储器之间的高速数据传输.无须CPU的干预,通过DMA数据可以快速地移动.这就节省了CPU的资源来做其他操作. 有多少个DMA资源? 有两个DMA控制器,DMA1有7个通道,DMA2有5个通道. 数据从什么地方送到什么地方? 外设到SRAM(I2C/UART等获取数据并送入SRAM): SRAM的两个区域之间: 外设…

原文出处:http://www.cnblogs.com/jacklu/p/4687325.html 本篇文章将对PCIe驱动程序的源文件代码作详细解释与说明.整个WDF驱动程序工程共包含4个头文件(已经在上篇文章中讲解)和3个.c文件(Driver.c  Device.c   Queue.c) Driver.c 在看复杂的代码前,先给出程序流程图 #include "driver.h" #include "driver.tmh" #ifdef ALLOC_PRAGM…

摘要: 本文以STM32F103RBT6为例介绍了片上Flash(Embedded Flash)若干问题,包括Flash大小(内存映射).块大小.页面大小.寄存器.这些知识,有利于写Flash驱动. 一.怎么看Flash大小 1.1 通过型号 型号会印在MCU表面,可以通过观察获得,我的是STM32F103RBT6(以下分析基于这个型号),对照下图的STM32产品命名,可知STM32F103RBT6的Flash是128KB. () 图1 Ordering information scheme 1…

因为我是在stm32上面做的加密操作,所以我只对stm32的方案做总结. 1.ATECC508的底层接口是i2c的,工程中跟i2c相关的操作放在文件hal_stm32l0_ateccx08_i2c.c中,文件应该放在cryptoauthlib\lib\hal\目录下. 2.Armel对这个库封装的比较深,分析下应用程序是如何调用底层的: atecc508_init atcab_init( gIfaceCfg ) //这个全局变量很重要,底层的驱动结构体就是绑定在这个全局变量上,后面调用底层驱动,…

pc机,服务器,智能手机与各种嵌入式乃至物联网 http://www.mifalife.net/hk/mall.html MIFA F5 户外无线蓝牙音箱2.0声道高保真可通话插卡便携低音炮迷你iphone/ipad手机音箱 梦想蓝 http://www.sharevdi.cn/index.php 华科智能技术支持qq号:2853232070 华科智能k600(win10专业版) amd显卡 http://support.amd.com/en-us/download 到手显卡:ATI mobil…

本文主要介绍的是DMA相关的知识,首先: 1)在实现DMA传输时,是由DMA控制器直接掌管总线,因此,存在着一个总线控制权转移问题.即DMA传输前,CPU要把 总线控制权交给DMA控制器,而在结束DMA传输后,DMA控制器应立即把总线控制权再交回给CPU.一个完整的DMA传输过 程必须经过DMA请求.DMA响应.DMA传输.DMA结束4个步骤. 2)DMA技术的出现,使得外围设备可以通过DMA控制器直接访问内存,与此同时,CPU可以继续执行程序．那么DMA控制器与CPU怎样分时使用内存呢?通常采…

FIELD OF THE INVENTION The present invention relates to a memory device and especially to the interfaces of memory cards. More specifically the present invention relates to Multi Media Cards (MMC) or Secure Digital (SD-) cards. There is a trend that…

参考资料:PM3官方Wiki 因为国内网络上大多是在Kali系统上使用PM3的教程(链接1.链接2.链接3),而这些教程的步骤对于Ubuntu系统并不完全适用.所以写下本文,记录我个人的安装经历. 本教程与官方Wiki相比省略了部分步骤,仅验证过在全程root用户操作时可行,建议按照官方英文教程进行安装 官方Wiki中的刷写固件步骤(Flashing XXX)非必须且风险较大,除非有需求,否则不要轻易刷固件,容易变砖 一.安装必要软件包 在终端中依次执行以下命令 sudo apt update…

本文分为两部分:"带参数的函数"和 "带修饰的函数". 浏览这篇博客前请先阅读: [NX二次开发]NX内部函数,查找内部函数的方法 带参数的函数: bool AMX__action_list_has_visible_items(struct AMX__action_list_s *)struct AMX__action_s * AMX__ask_action_by_accelerator(int,char const *)struct AMX__action_ite…

gitlab可以成功clone和push,但是提交后的文件却无法查看.从页面上看的话只显示出500错误. 查了下gitlab的日志 tail -f /var/log/gitlab/gitlab-rails/production.log 显示如下异常: Started GET -- :: + Processing by Projects::CommitController#show as HTML Parameters: {"namespace_id"=>"root&qu…

One of the problems with developing embedded systems is the detection of memory leaks; I've found three tools that are useful for this. These tools are used to detect application program errors, not kernel memory leaks. Two of these tools (mtrace and…

转: NAND Chip Drivers NAND technology users such as USB pen drives, DOMs, Compact Flash memory, and SD/MMC cards emulate standard storage interfaces such as SCSI or IDE over NAND flash, so you don't need to develop NAND drivers to communicate with the…

参考:http://www.design-reuse.com/articles/24503/nand-flash-memory-embedded-systems.html Abstract : This paper presents fundamental information about NAND Flash memory used in Embedded Systems. It discusses various aspects of this storage media such as…

最近需要做一个项目 在arm 架构的linux下 没有桌面环境的情况下拉起 有界面的浏览器使用. 考虑用qt 的界面和 qtwebikt 的库去实现这一系列操作. 本文参考: Qt移植到ARM Linux教程:http://www.veryarm.com/930.html 成功移植qt软键盘和输入法到arm开发板的qt程序中:http://www.csdn1 2 3.com/html/mycsdn20140110/d1/d1ecf8c322c9447b049f2a71d12f5e87.html…

转载自:http://linux.chinaunix.net/techdoc/install/2009/04/13/1107608.shtml 发信人: armlinux (armlinux), 信区: Embedded 标  题: 关于Embedded Linux启动的经典问题 发信站: 哈工大紫丁香 (Sun Aug 31 20:14:46 2003) On Sat 06 Apr, Arts Thibaut wrote: > due to compiling problem, i try t…

转自:http://www.cnblogs.com/think/archive/2011/10/06/CEF-Introduce.html 简介 Chromium Embedded Framework (CEF)是由 Marshall Greenblatt 在2008年创办的开源项目,致力于基于Google Chromium项目开发一个Web控件. CEF目前已支持多种编程语言和操作系统,能方便地集成到现有或者新的应用程序中,设计上,它追求高性能的同时,也追求易于使用,它的基本框架通过原生库提供…

Soc ( System on Chip) Soc is an integrated circuit (IC) that integrates all components of a computer or otherelectronic system into a single chip. It may contain digital, analog, mixed-signal, and often radio-frequency functions—all on a single chips…

In computer science, a memory leak occurs when a computer program incorrectly manages memory allocations.[1] In object-oriented programming, a memory leak may happen when an object is stored in memory but cannot be accessed by the running code.[2] A…

How to Use DTrace to Troubleshoot Java Native Memory Problems on Oracle Solaris 11 Hands-On Labs of the System Admin and Developer Community of OTN by Wang Yu, Vincent Liu, and Gary Wang This lab will introduce the basic concepts of DTrace and provid…

Memory management is the act of managing computer memory. The essential requirement of memory management is to provide ways to dynamically allocate portions of memory to programs at their request, and free it for reuse when no longer needed. This is…

http://www.opensourceforu.com/2011/06/qemu-for-embedded-systems-development-part-1/ http://www.opensourceforu.com/2011/07/qemu-for-embedded-systems-development-part-2/ http://www.opensourceforu.com/2011/08/qemu-for-embedded-systems-development-part-3…

The Performance Zone is brought to you in partnership with New Relic. Quickly learn how to use Docker and containers in general to create packaged images for easy management, testing, and deployment of software. It has sometimes been suggested that S…

最近需要做一个项目 在arm 架构的linux下 没有桌面环境的情况下拉起 有界面的浏览器使用. 考虑用qt 的界面和 qtwebikt 的库去实现这一系列操作. 本文参考: Qt移植到ARM Linux教程:http://www.veryarm.com/930.html 成功移植qt软键盘和输入法到arm开发板的qt程序中:http://www.csdn1 2 3.com/html/mycsdn20140110/d1/d1ecf8c322c9447b049f2a71d12f5e87.html…

Memory Limits for Windows and Windows Server Releases This topic describes the memory limits for supported Windows and Windows Server releases. Memory and Address Space Limits Physical Memory Limits: Windows 10 Physical Memory Limits: Windows 8 Physi…

For new(), there are three definition in C++11, which are listed below. throwing (1) void* operator new (std::size_t size); nothrow (2) void* operator new (std::size_t size, const std::nothrow_t& nothrow_value) noexcept; placement (3) void* operator…

As the complexity increasing of embedded software, more and more projects/products use C++ as the implementation language.  Firstly, I want to make a conclusion which applied in our company. Using C++ for a stronger MCU like 32bit MCU like panel, gat…

It’s coming up on a year since we published our last memory review; possibly the longest hiatus this section of the site has ever seen. To be honest, the reason we’ve refrained from posting much of anything is because things haven’t changed all that…