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Browsing Linux Kernel Source
The document discusses the Linux kernel and its structure. The Linux kernel acts as the interface between hardware and software, contains device drivers for peripherals, handles resource allocation and tracking application access to files. It is also responsible for security and access controls for users. The kernel version numbers use even numbers to indicate stable releases.
Software update for embedded systems - elce2014
Nowadays updating an embedded system is a mandatory feature. Not only due to security reasons, but bug fixes and new features are available after the release of a product, and in many cases an update
must be done in field. My presentation will show advantages and disadvantages for different ways for updating (using a bootloader, rescue system, etc.), taking into account reliability typical for embedded. The second part of the presentation will cover the OSS Project
"SWupdate", that I started some months ago, to provide a ready-to-use environment for updating, both local and in field, and mainly how this project can be used with Yocto.
Gstreamer plugin development
Gstreamer plugin development involves creating elements, plugins, and pads. Elements are the core components that process media streams. Plugins contain implementations of elements and are loaded on demand. Pads negotiate media flow between elements and ensure type compatibility. The chain function processes incoming buffers and passes them downstream. A simple pass-through filter would implement chain to push incoming buffers to the output pad without modification.
08 android multimedia_framework_overview
The document discusses Android's multimedia framework. It describes key concepts like codecs, file formats, and standards like MPEG. It outlines Android's initial OpenCORE multimedia framework and how it was later replaced by Stagefright. Both frameworks use OpenMAX to interface with codecs and leverage hardware acceleration. The frameworks handle container parsing, decoding, synchronization and output of audio and video streams.
Android Open Accessory Protocol - Turn Your Linux machine as ADK
The document discusses the Android Open Accessory Protocol (AOA) which allows external hardware called an Android Accessory Development Kit (ADK) to communicate with an Android device over USB. It covers initializing the connection, available hardware options, audio and HID support, sample apps, and developing custom apps. Communication involves the ADK sending and receiving data through bulk endpoints using simple file operations on the Linux side and an ADKControl class on the Android app side.
A practical guide to buildroot
Buildroot is a tool that generates embedded Linux systems by automating the configuration, compilation, and packaging of the system. It produces a root filesystem image ready to deploy on the target architecture. The build process compiles packages and a cross-compilation toolchain, then generates images containing the root filesystem, kernel, and other files needed by the target system. The output of Buildroot is organized into subdirectories containing the built images, toolchain, target and host files, and a staging area simulating the target filesystem.
SWITCHBLADE
The Switchblade is a small, portable unmanned aerial vehicle developed by AeroVironment that can be launched from a backpack and guided to destroy targets. It has a small warhead and wings that unfold during launch, allowing it to be guided by video or GPS to its target. The Switchblade was first tested in 2010 by the US Army and has since been ordered by both the Army and Marines. It provides reconnaissance and can switch to an explosive attack mode to crash into targets.
Heterogeneous multiprocessing on androd and i.mx7
This is out last presentation on AMP architectures and Android 7.1 More information on www.kynetics.com/doc
Recommended
Browsing Linux Kernel Source
The document discusses the Linux kernel and its structure. The Linux kernel acts as the interface between hardware and software, contains device drivers for peripherals, handles resource allocation and tracking application access to files. It is also responsible for security and access controls for users. The kernel version numbers use even numbers to indicate stable releases.
Software update for embedded systems - elce2014
Nowadays updating an embedded system is a mandatory feature. Not only due to security reasons, but bug fixes and new features are available after the release of a product, and in many cases an update
must be done in field. My presentation will show advantages and disadvantages for different ways for updating (using a bootloader, rescue system, etc.), taking into account reliability typical for embedded. The second part of the presentation will cover the OSS Project
"SWupdate", that I started some months ago, to provide a ready-to-use environment for updating, both local and in field, and mainly how this project can be used with Yocto.
Gstreamer plugin development
Gstreamer plugin development involves creating elements, plugins, and pads. Elements are the core components that process media streams. Plugins contain implementations of elements and are loaded on demand. Pads negotiate media flow between elements and ensure type compatibility. The chain function processes incoming buffers and passes them downstream. A simple pass-through filter would implement chain to push incoming buffers to the output pad without modification.
08 android multimedia_framework_overview
The document discusses Android's multimedia framework. It describes key concepts like codecs, file formats, and standards like MPEG. It outlines Android's initial OpenCORE multimedia framework and how it was later replaced by Stagefright. Both frameworks use OpenMAX to interface with codecs and leverage hardware acceleration. The frameworks handle container parsing, decoding, synchronization and output of audio and video streams.
Android Open Accessory Protocol - Turn Your Linux machine as ADK
The document discusses the Android Open Accessory Protocol (AOA) which allows external hardware called an Android Accessory Development Kit (ADK) to communicate with an Android device over USB. It covers initializing the connection, available hardware options, audio and HID support, sample apps, and developing custom apps. Communication involves the ADK sending and receiving data through bulk endpoints using simple file operations on the Linux side and an ADKControl class on the Android app side.
A practical guide to buildroot
Buildroot is a tool that generates embedded Linux systems by automating the configuration, compilation, and packaging of the system. It produces a root filesystem image ready to deploy on the target architecture. The build process compiles packages and a cross-compilation toolchain, then generates images containing the root filesystem, kernel, and other files needed by the target system. The output of Buildroot is organized into subdirectories containing the built images, toolchain, target and host files, and a staging area simulating the target filesystem.
SWITCHBLADE
The Switchblade is a small, portable unmanned aerial vehicle developed by AeroVironment that can be launched from a backpack and guided to destroy targets. It has a small warhead and wings that unfold during launch, allowing it to be guided by video or GPS to its target. The Switchblade was first tested in 2010 by the US Army and has since been ordered by both the Army and Marines. It provides reconnaissance and can switch to an explosive attack mode to crash into targets.
Heterogeneous multiprocessing on androd and i.mx7
This is out last presentation on AMP architectures and Android 7.1 More information on www.kynetics.com/doc
Network Programming: Data Plane Development Kit (DPDK)
This presentation introduces Data Plane Development Kit overview and basics. It is a part of a Network Programming Series.
First, the presentation focuses on the network performance challenges on the modern systems by comparing modern CPUs with modern 10 Gbps ethernet links. Then it touches memory hierarchy and kernel bottlenecks.
The following part explains the main DPDK techniques, like polling, bursts, hugepages and multicore processing.
DPDK overview explains how is the DPDK application is being initialized and run, touches lockless queues (rte_ring), memory pools (rte_mempool), memory buffers (rte_mbuf), hashes (rte_hash), cuckoo hashing, longest prefix match library (rte_lpm), poll mode drivers (PMDs) and kernel NIC interface (KNI).
At the end, there are few DPDK performance tips.
Tags: access time, burst, cache, dpdk, driver, ethernet, hub, hugepage, ip, kernel, lcore, linux, memory, pmd, polling, rss, softswitch, switch, userspace, xeon
Qt for beginners part 2 widgets
The document provides an overview of widgets in Qt, including:
- Common widgets like labels, buttons, text inputs, sliders and organizers
- Layout management using horizontal, vertical, grid and form layouts
- Using Qt Designer for visually designing user interfaces
- Integrating designer forms into code using generated header and class files
- Creating common dialogs like file selection, messages and progress
- Building applications with main windows, menus, toolbars, dock widgets and status bars
Win scp
WinSCP is a free Windows client that allows users to securely transfer files between a Windows machine and a Linux server using SCP and SSH. The document provides step-by-step instructions for using WinSCP to copy an Oracle Apps software folder from a Windows machine to a Linux server. It describes how to download and install WinSCP, configure a session by inputting host, port, username, and directory information, save the session, login, and drag and drop files between the local and remote directories. Basic navigation and file transfer functions like copying, selecting multiple files, and navigating folders are also overviewed.
Apostila Java2D (correta)
1. A apostila apresenta os principais conceitos e métodos da API Java 2D para desenho gráfico, incluindo cores, fontes, formas geométricas, arcos e polígonos.
2. É descrito o sistema de coordenadas em Java 2D, os contextos gráficos e a hierarquia de classes relacionadas ao desenho como Graphics, Graphics2D, Color, Font e Polygon.
3. São explicados em detalhes os métodos para desenhar linhas, retângulos, ovais, arcos e polígonos utilizando a classe Graphics, com exemp
Sw update elce2017
This document discusses SWUpdate, an open source software updater for embedded Linux systems. It provides concise summaries of SWUpdate's key features and architecture in 3 sentences or less:
SWUpdate allows for safe, atomic over-the-air software updates of embedded Linux devices, supporting updates to the bootloader, kernel, filesystem and more through features like signed images, rollback, and a modular architecture using handlers and scripts. It has a client-server model that supports both push and pull updates and integrates with build systems like Yocto and deployment platforms like hawkBit. SWUpdate's small footprint and power-off safety make it suitable for remotely updating a wide range of embedded Linux devices in the field.
AUV
This document provides information about autonomous underwater vehicles (AUVs). It discusses that AUVs are robotic devices that are controlled and piloted by onboard computers to perform underwater survey missions. They use various sensors like DVL, CTD, side-scan sonars, and magnetometers to navigate autonomously and map ocean features. AUVs can navigate using acoustic positioning systems when operating within a net of seafloor transponders or using ultra-short baseline positioning relative to a surface ship's GPS position. They are powered primarily by rechargeable batteries and propelled by propeller-based thrusters. AUVs have commercial uses in mapping seafloors for oil/gas infrastructure and military uses like mine
Embedded Linux Kernel - Build your custom kernel
Build your own Embedded Linux Kernel by understanding it source code organization, compilation ecosystem and compiling it for a custom target.
Linux-Internals-and-Networking
This document provides an overview of Linux internals and networking concepts covered in 3 sentences or less:
It introduces Linux internals topics like processes, memory management, and virtual file systems. It also discusses networking concepts and provides a brief history of operating systems development. The document contains various sections on Linux components, kernel subsystems, virtual file systems, and transitioning to systems programming.
Guide to GStreamer Application Development Manual: CH1 to CH10
Change log:
May/13/2014: Revise description for PAUSE state
Automotive network and gateway simulation
Analytical, prototyping, model-based systems engineering and custom discrete-event model development of automotive networks are inaccurate, expensive, and takes too long to do detailed routing analysis, Quality-of-Service (QoS) trade-off, and bandwidth exploration. To capture the nuances of QoS, scheduling, buffer management, and network topologies, these solutions require a considerable amount of time, costs, and customization. To achieve the reliability of wiring harness, the latency and bandwidth measurements of automotive networks must be accurate, tested for failure conditions, and simulated for security breaches, traffic spikes, and translations.
Q4.11: Using GCC Auto-Vectorizer
The document discusses using GCC's auto-vectorizer to optimize loops. It provides flags and options for enabling vectorization, checking which loops were vectorized, and tips for writing vectorizable code. Examples are given of vectorized NEON code for improved performance. The Linaro Toolchain group works on vectorization and related optimizations, and examples from users can help with vectorization efforts.
Diving into SWUpdate: adding new platform support in 30minutes with Yocto/OE !
The document discusses adding new platform support for SWUpdate in 30 minutes using Yocto/OE. It provides an overview of SWUpdate and the update process. It then demonstrates how to generate a clean Yocto/OE setup for the Microchip SAMA5D27-SOM1-EK1 board using KAS. Specific steps are outlined for creating a partition scheme, machine configuration, and deployment/testing of SWUpdate on the target board.
2. avionics architecture da cp
The document summarizes the evolution of avionics architectures from independent analog systems to integrated modular digital systems. It describes four generations: (1) Independent analog systems from the 1940s-50s with no communication between systems; (2) Federated digital architectures from the 1960s-70s with loosely coupled systems connected via data buses; (3) Integrated modular architectures from the 1980s-90s with increased digitalization and function sharing; and (4) Advanced integrated architectures post-2000 with common modules, processors and an open systems approach. The modern trend is toward greater integration, modularity, networking and software-defined functionality.
Embedded Android : System Development - Part III
For new age touch-based embedded devices, Android is becoming a popular OS going beyond mobile phones. With its roots from Embedded Linux, Android framework offers benefits in terms of rich libraries, open-source and multi-device support. Emertxe’s hands-on Embedded Android Training Course is designed to customize, build and deploy custom Embedded OS on ARM target. Rich set of projects will make your learning complete.
Linux programming - Getting self started
Getting started with Linux programming requires to build certain basic understanding. Here is a self learning material to getting started with Linux
Introduction to Embedded System
An introductory presentation to Embedded Systems. Ideal for beginners to get started with Embedded fundamentals.
Propulsion
This document provides an overview of propulsion systems. It discusses different types of propulsion including liquid, solid, electric propulsion and others. It also covers key concepts in propulsion performance including specific impulse, thrust, nozzle design and equations. The document uses examples and diagrams to illustrate concepts in propulsion systems and their applications in launch vehicles and spacecraft.
ความร เก__ยวก_บรอมฎอน
This document discusses various topics related to Islamic practices, including salaat (prayer), taraweeh (special prayers performed during Ramadan), qunoot (special supplication performed in witr prayer), and zakat (obligatory alms-giving in Islam). It provides details on the rules and procedures for performing these religious obligations properly based on Islamic teachings and traditions. Various numerical examples are also given to illustrate concepts like calculating zakat amounts.
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Network Programming: Data Plane Development Kit (DPDK)
This presentation introduces Data Plane Development Kit overview and basics. It is a part of a Network Programming Series.
First, the presentation focuses on the network performance challenges on the modern systems by comparing modern CPUs with modern 10 Gbps ethernet links. Then it touches memory hierarchy and kernel bottlenecks.
The following part explains the main DPDK techniques, like polling, bursts, hugepages and multicore processing.
DPDK overview explains how is the DPDK application is being initialized and run, touches lockless queues (rte_ring), memory pools (rte_mempool), memory buffers (rte_mbuf), hashes (rte_hash), cuckoo hashing, longest prefix match library (rte_lpm), poll mode drivers (PMDs) and kernel NIC interface (KNI).
At the end, there are few DPDK performance tips.
Tags: access time, burst, cache, dpdk, driver, ethernet, hub, hugepage, ip, kernel, lcore, linux, memory, pmd, polling, rss, softswitch, switch, userspace, xeon
Qt for beginners part 2 widgets
The document provides an overview of widgets in Qt, including:
- Common widgets like labels, buttons, text inputs, sliders and organizers
- Layout management using horizontal, vertical, grid and form layouts
- Using Qt Designer for visually designing user interfaces
- Integrating designer forms into code using generated header and class files
- Creating common dialogs like file selection, messages and progress
- Building applications with main windows, menus, toolbars, dock widgets and status bars
Win scp
WinSCP is a free Windows client that allows users to securely transfer files between a Windows machine and a Linux server using SCP and SSH. The document provides step-by-step instructions for using WinSCP to copy an Oracle Apps software folder from a Windows machine to a Linux server. It describes how to download and install WinSCP, configure a session by inputting host, port, username, and directory information, save the session, login, and drag and drop files between the local and remote directories. Basic navigation and file transfer functions like copying, selecting multiple files, and navigating folders are also overviewed.
Apostila Java2D (correta)
1. A apostila apresenta os principais conceitos e métodos da API Java 2D para desenho gráfico, incluindo cores, fontes, formas geométricas, arcos e polígonos.
2. É descrito o sistema de coordenadas em Java 2D, os contextos gráficos e a hierarquia de classes relacionadas ao desenho como Graphics, Graphics2D, Color, Font e Polygon.
3. São explicados em detalhes os métodos para desenhar linhas, retângulos, ovais, arcos e polígonos utilizando a classe Graphics, com exemp
Sw update elce2017
This document discusses SWUpdate, an open source software updater for embedded Linux systems. It provides concise summaries of SWUpdate's key features and architecture in 3 sentences or less:
SWUpdate allows for safe, atomic over-the-air software updates of embedded Linux devices, supporting updates to the bootloader, kernel, filesystem and more through features like signed images, rollback, and a modular architecture using handlers and scripts. It has a client-server model that supports both push and pull updates and integrates with build systems like Yocto and deployment platforms like hawkBit. SWUpdate's small footprint and power-off safety make it suitable for remotely updating a wide range of embedded Linux devices in the field.
AUV
This document provides information about autonomous underwater vehicles (AUVs). It discusses that AUVs are robotic devices that are controlled and piloted by onboard computers to perform underwater survey missions. They use various sensors like DVL, CTD, side-scan sonars, and magnetometers to navigate autonomously and map ocean features. AUVs can navigate using acoustic positioning systems when operating within a net of seafloor transponders or using ultra-short baseline positioning relative to a surface ship's GPS position. They are powered primarily by rechargeable batteries and propelled by propeller-based thrusters. AUVs have commercial uses in mapping seafloors for oil/gas infrastructure and military uses like mine
Embedded Linux Kernel - Build your custom kernel
Build your own Embedded Linux Kernel by understanding it source code organization, compilation ecosystem and compiling it for a custom target.
Linux-Internals-and-Networking
This document provides an overview of Linux internals and networking concepts covered in 3 sentences or less:
It introduces Linux internals topics like processes, memory management, and virtual file systems. It also discusses networking concepts and provides a brief history of operating systems development. The document contains various sections on Linux components, kernel subsystems, virtual file systems, and transitioning to systems programming.
Guide to GStreamer Application Development Manual: CH1 to CH10
Change log:
May/13/2014: Revise description for PAUSE state
Automotive network and gateway simulation
Analytical, prototyping, model-based systems engineering and custom discrete-event model development of automotive networks are inaccurate, expensive, and takes too long to do detailed routing analysis, Quality-of-Service (QoS) trade-off, and bandwidth exploration. To capture the nuances of QoS, scheduling, buffer management, and network topologies, these solutions require a considerable amount of time, costs, and customization. To achieve the reliability of wiring harness, the latency and bandwidth measurements of automotive networks must be accurate, tested for failure conditions, and simulated for security breaches, traffic spikes, and translations.
Q4.11: Using GCC Auto-Vectorizer
The document discusses using GCC's auto-vectorizer to optimize loops. It provides flags and options for enabling vectorization, checking which loops were vectorized, and tips for writing vectorizable code. Examples are given of vectorized NEON code for improved performance. The Linaro Toolchain group works on vectorization and related optimizations, and examples from users can help with vectorization efforts.
Diving into SWUpdate: adding new platform support in 30minutes with Yocto/OE !
The document discusses adding new platform support for SWUpdate in 30 minutes using Yocto/OE. It provides an overview of SWUpdate and the update process. It then demonstrates how to generate a clean Yocto/OE setup for the Microchip SAMA5D27-SOM1-EK1 board using KAS. Specific steps are outlined for creating a partition scheme, machine configuration, and deployment/testing of SWUpdate on the target board.
2. avionics architecture da cp
The document summarizes the evolution of avionics architectures from independent analog systems to integrated modular digital systems. It describes four generations: (1) Independent analog systems from the 1940s-50s with no communication between systems; (2) Federated digital architectures from the 1960s-70s with loosely coupled systems connected via data buses; (3) Integrated modular architectures from the 1980s-90s with increased digitalization and function sharing; and (4) Advanced integrated architectures post-2000 with common modules, processors and an open systems approach. The modern trend is toward greater integration, modularity, networking and software-defined functionality.
Embedded Android : System Development - Part III
For new age touch-based embedded devices, Android is becoming a popular OS going beyond mobile phones. With its roots from Embedded Linux, Android framework offers benefits in terms of rich libraries, open-source and multi-device support. Emertxe’s hands-on Embedded Android Training Course is designed to customize, build and deploy custom Embedded OS on ARM target. Rich set of projects will make your learning complete.
Linux programming - Getting self started
Getting started with Linux programming requires to build certain basic understanding. Here is a self learning material to getting started with Linux
Introduction to Embedded System
An introductory presentation to Embedded Systems. Ideal for beginners to get started with Embedded fundamentals.
Propulsion
This document provides an overview of propulsion systems. It discusses different types of propulsion including liquid, solid, electric propulsion and others. It also covers key concepts in propulsion performance including specific impulse, thrust, nozzle design and equations. The document uses examples and diagrams to illustrate concepts in propulsion systems and their applications in launch vehicles and spacecraft.
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Guide to GStreamer Application Development Manual: CH1 to CH10
Guide to GStreamer Application Development Manual: CH1 to CH10
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ความร เก__ยวก_บรอมฎอน
This document discusses various topics related to Islamic practices, including salaat (prayer), taraweeh (special prayers performed during Ramadan), qunoot (special supplication performed in witr prayer), and zakat (obligatory alms-giving in Islam). It provides details on the rules and procedures for performing these religious obligations properly based on Islamic teachings and traditions. Various numerical examples are also given to illustrate concepts like calculating zakat amounts.
تذكرة الصيام
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أخطاؤنا في رمضان... 4ـ الأخطاء الخاصة بصلاة الوتر، ودعاء القنوت
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