S32K314 GMAC issue

ZouShaoxiong — Fri, 17 Nov 2023 11:02:35 GMT

Dear NXP experts,

We are using S32K314 Ethernet and already got demo code of lwip_s32k344 and lwip start guide from NXP FAE ，and we finally change MCU part from S32K344 to S32K314, and I have attached the project with lwip_s32k314_172MQFP_board.zip.

We have some info confirmed:

1) Schematic designed according to:

We use MII mode, pins are correctly routed.

2) PHY TJA1101A works:

with ID1 and ID2: 0x0180 and 0x1D01

when working, status register 23 value is 0xBCE4, SQI seems OK

3) Upon S32K314 board is powered, we could capture the packets on the PC via a ethernet converter.

The packet attached by s32k314_eth_cap_data_not_correct.zip. We found that every packet send from MCU is not all bits right.

to show one example，

THE first frame send from MCU in LWIP stack(dump from GMAC_0_TxRing_0_DataBuffer with debugger):

But actually, we only capture data like below:

We thought something wrong with the GMAC.

Could you figure out what may be wrong?

Thanks.

Re: S32K314 GMAC issue

ZouShaoxiong — Fri, 17 Nov 2023 11:05:59 GMT

We currently do not have one demo board, so we could not test this code with demo code.

Re: S32K314 GMAC issue

Nhi_Nguyen — Mon, 11 Dec 2023 08:27:25 GMT

Hi @ZouShaoxiong ,

Follow to RM:

You configured pin correctly:

But, seem that have a problem with clock configuration, you can try this:

Best regards,

Nhi

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