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2023-06-27 20:52| 来源: 网络整理| 查看: 265

p-net Profinet device stack Web resources Source repository: https://github.com/rtlabs-com/p-net Documentation: https://rt-labs.com/docs/p-net Continuous integration: https://travis-ci.com/rtlabs-com/p-net RT-Labs: https://rt-labs.com

Build Status

p-net

Profinet device stack implementation. Key features:

Profinet v2.4 Conformance Class A and B Real Time Class 1 Easy to use Extensive documentation and instructions on how to get started. Build and run sample application on Raspberry Pi in 30 minutes. Portable Written in C. Linux, RTOS or bare metal. Sources for supported port layers provided.

The RT-Labs Profinet stack p-net is used for Profinet device implementations. It is easy to use and provides a small footprint. It is especially well suited for embedded systems where resources are limited and efficiency is crucial. The stack is supplied with full sources including porting layers and a sample application.

Also C++ (any version) is supported for application development.

The main requirement on the platform is that it can send and receive raw Ethernet Layer 2 frames.

Features:

TCP/IP RT (real-time) Address resolution Parameterization Process IO data exchange Alarm handling Configurable number of modules and sub-modules Bare-metal or OS Porting layer provided Supports I&M0 - I&M4. The I&M data is supported for the device, but not for individual modules.

Limitations or not yet implemented:

Only a single Ethernet port (no media redundancy) No startup mode legacy No support for RT_CLASS_UDP No support for DHCP No fast start-up No MC multicast device-to-device No iPar (parameter server) support No support for time synchronization No UDP frames at alarm (just the default alarm mechanism is implemented)

This software is dual-licensed, with GPL version 3 and a commercial license. See LICENSE.md for more details.

Requirements

The platform must be able to send and receive raw Ethernet Layer 2 frames, and the Ethernet driver must be able to handle full size frames. It should also avoid copying data, for performance reasons.

cmake 3.14 or later

For Linux:

gcc 4.6 or later See the "Real-time properties of Linux" page in the documentation on how to improve Linux timing

For rt-kernel:

Workbench 2020.1 or later

An example of microcontroller we have been using is the Infineon XMC4800, which has an ARM Cortex-M4 running at 144 MHz, with 2 MB Flash and 352 kB RAM. It runs rt-kernel, and we have tested it with 9 Profinet slots each having 8 digital inputs and 8 digital outputs (one bit each). The values are sent and received each millisecond (PLC watchdog setting 3 ms).

Dependencies

The p-net stack contains no third party components. Its external dependencies are:

C-library An operating system (if used)

Tools used for building and documentation (not shipped in the resulting binaries):

cmake (BSD 3-clause License) Sphinx (BSD license) Contributions

Contributions are welcome. If you want to contribute you will need to sign a Contributor License Agreement and send it to us either by e-mail or by physical mail. More information is available on https://rt-labs.com/contribution.

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