S32K314 GMAC issue

[ZouShaoxiong]

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:

ZouShaoxiong_1-1700217676462.jpeg

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

ZouShaoxiong_2-1700217739509.png

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):

ZouShaoxiong_1-1700218836531.png

But actually, we only capture data like below:

ZouShaoxiong_2-1700218913213.png

We thought something wrong with the GMAC.

Could you figure out what may be wrong?

Thanks.

[Nhi_Nguyen]

Hi @ZouShaoxiong ,

Follow to RM:

Nhi_Nguyen_0-1702283078476.pngNhi_Nguyen_1-1702283097389.png

You configured pin correctly:

Nhi_Nguyen_3-1702283222842.png

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

Nhi_Nguyen_2-1702283203986.png

Best regards,

Nhi

[ZouShaoxiong]

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