車の運転席に座ると,実にさまざまな情報が視界に入ってきます。車の速度がわかるスピードメータ,エンジンの回転数がわかるタコメータ,燃料があとどのくらいあるかを示すフェールゲージ,水温計,警告表示灯など,その多くがインストルメントパネル(インパネ)に集中しています(図1)。 これらの情報を集約して制御しているインパネ制御はどのように行われているのでしょうか。連載第1回の「車内LANって何だろう」でも触れましたが,車の中にはECU(electronic control unit)と呼ぶ電子制御装置があちこちに搭載されています。エンジン制御用やヘッドライト制御用,ドア制御用などの各ECUと,インパネ制御用のECUが連動することにより,それらの情報が一目でわかるようにインパネに表示されます。 エンジン制御ECUより得た情報を基にスピードメータやタコメータを動作させ,エンジンの冷却水の温度に異常があれ
Free and open-source software portal SocketCAN is a set of open source CAN drivers and a networking stack contributed by Volkswagen Research to the Linux kernel. SocketCAN was formerly known as Low Level CAN Framework (LLCF). Typical CAN communication layers. With SocketCAN (left) or conventional (right). Traditional CAN drivers for Linux are based on the model of character devices. Typically they
SocketCAN (python)¶ Python 3.3 added support for socketcan for linux systems. The socketcan_native interface directly uses Python’s socket module to access SocketCAN on linux. This is the most direct route to the kernel and should provide the most responsive. The implementation features efficient filtering of can_id’s, this filtering occurs in the kernel and is much much more efficient than filter
1 Introduction Bluetechnix offers a Board Support Package that is based on the U-Boot boot loader and the Linux kernel. The build environment is LTIB, the Linux Target Image Builder, which is Freescale's preferred way to offer Linux board support packages. Bluetechnix provides a patch set that is installed on top of Freescale's i.MX6 LTIB BSP. Our BSP offers patches for Linux and U-Boot to work wi
Socketcan Quickstart¶ The full documentation for socketcan can be found in the kernel docs at networking/can.txt. The CAN network driver provides a generic interface to setup, configure and monitor CAN devices. To configure bit-timing parameters use the program ip. The virtual CAN driver (vcan)¶ The virtual CAN interfaces allow the transmission and reception of CAN frames without real CAN controll
python-can¶ python-can is a library for interacting with a controller area network. The Controller Area Network is a bus standard designed to allow embedded devices to communicate with each other. It has priority based bus arbitration, reliable deterministic communication. It is used in cars, trucks, boats, wheelchairs and more. Contents:
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