AM4378: peripheral boot over ethernet is not working on am4378 based custom board.

siva nallamalli

Part Number: AM4378

We are having am437x based custom board with two ethernet ports. I am trying to boot up the board over ethernet.

I am trying to boot up the board over ethernet, with sysboot pins configured accordingly. I tried connecting ethernet cable to both ethernet ports and not seeing Led's on ethernet phy glowing.

On Linux Machine i am using wireshark & tcp dump tools to observe packets traces. I am not getting BOOTP packets on the trace.

SYSBOOT [4:0] pin configuration i tried for ethernet boot up.

10110, 10111, 11011, 11100.

please let me know whether i am missing anything. please find the schematic screenshot.

over 1 year ago

0 JJD over 1 year ago

TI__Guru 72070 points

Do you have JTAG connection to your board? If so, set your boot mode to 11100, power up the board and connect JTAG and check the CTRL_STS register at address 0x44E10040. Please provide the output here.

Can you also provide the schematic of the Ethernet PHY and it's interface to the processor.

Regards,

James

0 siva nallamalli over 1 year ago in reply to JJD

Intellectual 800 points

please share your email so that i can share schematic with MFT tools.

0 JJD over 1 year ago in reply to siva nallamalli

TI__Guru 72070 points

Siva, please check the answer here: https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1175806/am4378-am437x-gp-evm-peripheral-boot-up-over-ethernet

Most likely you will need to change the PHY boot strapping as mentioned in the post.

REgards,

James

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AM4378: peripheral boot over ethernet is not working on am4378 based custom board.