MIMXRT1024-EVK - Can Only Receive One Packet Over Ethernet

[John_Warila]

We are trying to bring up ethernet networking on the MIMXRT1024-EVK boards and are encountering some strange behavior. We can receive only a single Rx packet per boot of the board. Tx packets work fine.

After dumping the KSZ8081 PHY registers, it seems to be performing correctly. And we physically validated that the clocks are the correct frequency.

When we look into the ENET registers we see that non of the frame/packet statistic registers update when an Rx packet is received, but we see the interrupt happening. Has anyone seen this behavior where the ENET seemingly drops the packet?

For reference we are using the SDK provided drivers, and lwIP for networking.

[jeremyzhou]

Hi,
Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
According to your reply, it seems like that the SDK's Lwip demos don't work well on the MIMXRT1024-EVK board and you guess it may be related to the KSZ8081 PHY chip, isn't my understanding right?
If Yes, I'd like to know whether you ever change the hardware circuit of the EVK board and the version of SDK you tested.
Have a great day,
TIC

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[John_Warila]

Hey thanks for the reply,

We have already exonerated the hardware by running the lwIP demos and seeing good results. We have taken the SDK generated drivers and lwIP middleware and pulled them into our build system (which is just arm-gcc like the MCUXPRESSO IDE). We don't believe it is the PHY either, since we don't see bytes getting into the PHY after the first packet.

[jeremyzhou]

Hi,
Thanks for your reply.
According to your reply, the PHY chip seems to work well.
For the SDK library, it supports running the demos with the Arm GCC toolchain and the attachment shows how to run a demo using Arm GCC, please refer to it to run the Lwip demo with the Arm GCC.
In further, the issue may be related to other functions in the application, however, it needs time to investigate.

Have a great day,
TIC

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