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CANpie
CANpie (CAN Programming Interface Environment) is an open source project and pursues the objective of creating and establishing an open and standardized software API for access to the CAN bus. The project was established in 2001 by MicroControl and is licensed under Apache License version 2.0. The current version of the CANpie API covers both classical CAN frames as well as ISO CAN FD frames. The API is designed for embedded control applications as well as for PC interface boards: embedded microcontrollers are programmed in C, a C++ API is provided for OS independent access to interface boards. The API provides ISO/OSI Layer-2 (Data Link Layer) functionality. It is not the intention of CANpie to incorporate higher layer functionality (e.g. CANopen, SAE J1939). Driver principle The CANpie API supports the concept of hardware message buffers (mailboxes) with a total limit of 255 buffers. A message buffer has a unique direction (receive or transmit). As an option it is pos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canpie Structure
CANpie (CAN Programming Interface Environment) is an open source project and pursues the objective of creating and establishing an open and standardized software API for access to the CAN bus. The project was established in 2001 by MicroControl and is licensed under Apache License, Apache License version 2.0. The current version of the CANpie API covers both classical CAN frames as well as CAN FD, ISO CAN FD frames. The API is designed for embedded control applications as well as for PC interface boards: embedded microcontrollers are programmed in C, a C++ API is provided for OS independent access to interface boards. The API provides ISO/OSI Layer-2 (Data Link Layer) functionality. It is not the intention of CANpie to incorporate higher layer functionality (e.g. CANopen, SAE J1939). Driver principle The CANpie API supports the concept of hardware message buffers (mailboxes) with a total limit of 255 buffers. A message buffer has a unique direction (receive or transmit). As ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CAN Bus
A Controller Area Network (CAN bus) is a robust vehicle bus standard designed to allow microcontrollers and devices to communicate with each other's applications without a host computer. It is a message-based protocol, designed originally for multiplex electrical wiring within automobiles to save on copper, but it can also be used in many other contexts. For each device, the data in a frame is transmitted serially but in such a way that if more than one device transmits at the same time, the highest priority device can continue while the others back off. Frames are received by all devices, including by the transmitting device. History Development of the CAN bus started in 1983 at Robert Bosch GmbH. The protocol was officially released in 1986 at the Society of Automotive Engineers (SAE) conference in Detroit, Michigan. The first CAN controller chips were introduced by Intel in 1987, and shortly thereafter by Philips. Released in 1991, the Mercedes-Benz W140 was the first produc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Open Source
Open source is source code that is made freely available for possible modification and redistribution. Products include permission to use the source code, design documents, or content of the product. The open-source model is a decentralized software development model that encourages open collaboration. A main principle of open-source software development is peer production, with products such as source code, blueprints, and documentation freely available to the public. The open-source movement in software began as a response to the limitations of proprietary code. The model is used for projects such as in open-source appropriate technology, and open-source drug discovery. Open source promotes universal access via an open-source or free license to a product's design or blueprint, and universal redistribution of that design or blueprint. Before the phrase ''open source'' became widely adopted, developers and producers have used a variety of other terms. ''Open source'' gained ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Computer-mediated Communication
Computer-mediated communication (CMC) is defined as any human communication that occurs through the use of two or more electronic devices. While the term has traditionally referred to those communications that occur via computer-mediated formats (e.g., instant messaging, email, chat rooms, online forums, social network services), it has also been applied to other forms of text-based interaction such as text messaging. Research on CMC focuses largely on the social effects of different computer-supported communication technologies. Many recent studies involve Internet-based social networking supported by social software. Forms Computer-mediated communication can be broken down into two forms: synchronous and asynchronous. Synchronous computer-mediated communication refers to communication that occurs in real-time. All parties are engaged in the communication simultaneously; however, they are not necessarily all in the same location. Examples of synchronous communication are vi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ARM Architecture
ARM (stylised in lowercase as arm, formerly an acronym for Advanced RISC Machines and originally Acorn RISC Machine) is a family of reduced instruction set computer (RISC) instruction set architectures for computer processors, configured for various environments. Arm Ltd. develops the architectures and licenses them to other companies, who design their own products that implement one or more of those architectures, including system on a chip (SoC) and system on module (SOM) designs, that incorporate different components such as memory, interfaces, and radios. It also designs cores that implement these instruction set architectures and licenses these designs to many companies that incorporate those core designs into their own products. There have been several generations of the ARM design. The original ARM1 used a 32-bit internal structure but had a 26-bit address space that limited it to 64 MB of main memory. This limitation was removed in the ARMv3 series, which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SocketCAN
SocketCAN is a set of open source CAN bus, CAN drivers and a networking stack contributed by Volkswagen, Volkswagen Research to the Linux kernel. SocketCAN was formerly known as ''Low Level CAN Framework'' (LLCF). Traditional CAN drivers for Linux are based on the model of character devices. Typically they only allow sending to and receiving from the CAN controller. Conventional implementations of this class of device driver only allow a single process to access the device, which means that all other processes are blocked in the meantime. In addition, these drivers typically all differ slightly in the interface presented to the application, stifling portability. The SocketCAN concept on the other hand uses the model of network devices, which allows multiple applications to access one CAN device simultaneously. Also, a single application is able to access multiple CAN networks in parallel. The SocketCAN concept extends the Berkeley sockets API in Linux by introducing a new protoc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Can4linux
can4linux is an Open Source CAN Linux-Kernel device driver. Development started in the mid-1990s for the Philips 82C200 CAN controller stand alone chip on an ISA Board AT-CAN-MINI. In 1995 the first version was created to use the CAN bus with Linux for laboratory automation as a project of the Linux Lab Project at FU Berlin. The increasing spread of the CAN field bus technology for automation especially in embedded devices and the growth of Linux in this area leads to a growing importance of device drivers as base for higher layer CAN protocols like CANopen, J1939 and DeviceNet. Besides the NXP SJA1000 as successor of the first supported CAN controller Philips 82C200 and the Intel 82527, the development for powerful microcontrollers with integrated CAN controllers that are capable to run the Linux Operating system have been intensified since 2005. As examples for this development serve Freescale's ColdFire processors or ARM models by ATMEL and Freescale but also the stand- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Linux
Linux ( or ) is a family of open-source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991, by Linus Torvalds. Linux is typically packaged as a Linux distribution, which includes the kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name "GNU/Linux" to emphasize the importance of GNU software, causing some controversy. Popular Linux distributions include Debian, Fedora Linux, and Ubuntu, the latter of which itself consists of many different distributions and modifications, including Lubuntu and Xubuntu. Commercial distributions include Red Hat Enterprise Linux and SUSE Linux Enterprise. Desktop Linux distributions include a windowing system such as X11 or Wayland, and a desktop environment such as GNOME or KDE Plasma. Distributions intended for ser ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CAN In Automation
CAN in Automation (CiA)391 is the international users' and manufacturers' organization that develops and supports CAN-based higher-layer protocols. About 650 (2018) companies from all over the world have joined the non-profit organization. CAN specifications are developed within CiA interest groups (IG) in cooperation with employees of the member companies. The following IGs have been established: IG CANopen, IG CANopen FD, IG profiles, IG layer 1/2, IG safety/security, IG J1939. The interest groups manage their related special interest groups (SIG). These special interest groups (SIG) develop for example dedicated CiA specifications and recommendations (e.g. device and applications profiles for CANopen and CANopen FD). CiA representatives support many international standardization activities (ISO, IEC, CEN, Cenelec CENELEC (french: Comité Européen de Normalisation Électrotechnique; en, European Committee for Electrotechnical Standardization) is responsible for European ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
FIFO (computing And Electronics)
Representation of a FIFO queue In computing and in systems theory, FIFO is an acronym for first in, first out (the first in is the first out), a method for organizing the manipulation of a data structure (often, specifically a data buffer) where the oldest (first) entry, or "head" of the queue, is processed first. Such processing is analogous to servicing people in a queue area on a first-come, first-served (FCFS) basis, i.e. in the same sequence in which they arrive at the queue's tail. FCFS is also the jargon term for the FIFO operating system scheduling algorithm, which gives every process central processing unit (CPU) time in the order in which it is demanded. FIFO's opposite is LIFO, last-in-first-out, where the youngest entry or "top of the stack" is processed first. A priority queue is neither FIFO or LIFO but may adopt similar behaviour temporarily or by default. Queueing theory encompasses these methods for processing data structures, as well as interactions between s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SAE J1939
Society of Automotive Engineers standard SAE J1939 is the vehicle bus recommended practice used for communication and diagnostics among vehicle components. Originating in the car and heavy-duty truck industry in the United States, it is now widely used in other parts of the world. SAE J1939 is used in the commercial vehicle area for connection and communication throughout the vehicle, with the physical layer defined in ISO 11898. A different physical layer is used between the tractor and trailer, specified in ISO 11992. History Originally, Controller Area Network (CAN) was not mentioned in J1939, which covered cars and tractor-trailer rigs, and with some dual and triple use 8-bit addresses assigned by the SAE J1939 board. CAN was not originally free, but its instruction set did fit in the custom instruction format of J1939. This was true as of 2000. Since then, CAN has been included, the chipset for J1939 has been clocked faster, and 16-bit addresses (PGN) have replaced 8-bit ad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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