Zephyr™项目是一个采用Apache 2.0协议许可，Linux基金会托管的协作项目。为所有资源受限设备，构建了针对低功耗、小型内存微处理器设备而进行优化的物联网嵌入式小型、可扩展的实时操作系统（RTOS），支持多种硬件架构及多种开发板，可以在小至8 kB内存的系统上运行。采用深入的安全开发生命 ... Also covered is the Audio Video Bridging (AVB) suite used to transport media over Ethernet, including underlying standards: SRP (IEEE 802.1Qat), FQTSS (IEEE 802.1Qav), gPTP (IEEE 802.1AS), and AVTP (IEEE 1722). The book also describes diagnostics in an Ethernet environment, and tools for measurement, calibration and diagnostics (MCD).
Introduction . This is an example Intel provided gptp daemon which can be used on Linux and Windows platforms. There are a number of other ptp daemons available for Linux which can be used to establish clock synchronization, although not all may export the required APIs needed for an AVB system. UDP: Typically, PTP uses UDP as its transport protocol (although other transport protocols are possible). The well known UDP ports for PTP traffic are 319 (Event Message) and 320 (General Message). Ethernet: Starting with IEEE1588 Version2, a native Layer2 Ethernet implementation was designed. PTP can use Ethernet as its transport protocol.
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