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Participant n.horvat
Participant
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Registered: ‎02-19-2018

AXI Ethernet Subsystem control TREADY is stuck low

Hello,

I have some problems with "AXI 1G/2.5G Ethernet Subsystem (7.1)" while exceeding bandwidth of 800 Mbps. I'm using xczu2cg device and "AXI 1G/2.5G Ethernet Subsystem" in 1Gbps configuration (RGMII, TX/RX memory size is 32k).

Problem is that "AXI_STR_TXC_TREADY" is stuck Low following the "AXI_STR_TXC_TVALID" being asserted when bandwidth is greater
than 800Mbps (everything work fine with bandwidth bellow 800Mbps).

I'm using custom module for preparing and sending ehternet packets toward "AXI 1G/2.5G Ethernet Subsystem" via Dual Channel AXI4-Stream.
I can confirm that my custom module strictly follows the Waveform described in "AXI 1G/2.5G Ethernet Subsystem v7.1 Product Guide - PG138" (page 104, Figure 3-2: Normal Transmit AXI4-Stream Waveform).

Any suggestion? What should I check?

 

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