41.4. tsn_frame_preemption_ingress

41.4.1. Overview

This example shows TSN frame preemption(IEEE802.1 Qbu) output

• Observe the value of fragment tx counter from MMS

  • Increment indicates that the preemptible traffic is successfully sent.

• On the receiving end, run the sample tsn_frame_preemption_egress on another development board and observe the order of the receiving frame and the value of assembly ok counter.

41.4.2. Board Settings

• Connect a USB port on PC to the PWR DEBUG port on the development board with a USB Type-C cable

• Connect RGMII ports on the two development board with an Ethernet cable

41.4.3. Project Configurations

• None

41.4.4. Run Example

• Compiling and Downloading

• Running log is shown in the serial terminal as follows:

  This is a TSW demo: Frame Preemption Ingress
  TSW phy init passed !
  Link Status: Down
  Link Status: Up
  Link Speed:  1000Mbps
  Link Duplex: Full duplex
  tc: 1 - utag: 2 - tts(s): 842.005733760 - frame interval(ns): 0
  tc: 0 - utag: 1 - tts(s): 842.005735630 - frame interval(ns): 1870
  FPE MMS Fragment Tx Counter: 1
  ==================================================================
  tc: 1 - utag: 2 - tts(s): 842.526724320 - frame interval(ns): 0
  tc: 0 - utag: 1 - tts(s): 842.526726000 - frame interval(ns): 1680
  FPE MMS Fragment Tx Counter: 2
  ==================================================================
  tc: 1 - utag: 2 - tts(s): 843.047703500 - frame interval(ns): 0
  tc: 0 - utag: 1 - tts(s): 843.047705180 - frame interval(ns): 1680
  FPE MMS Fragment Tx Counter: 3
  ==================================================================