AM2434: Rx error on RGMII

Tsurumoto

Genius 15755 points

Part Number: AM2434

At the page 3208 of AM64x/AM243x Technical Reference Manual (Rev. F), I got some questions from customer.

I'm not sure what does the above yellow lines mean.

1) Please explain it more details?

2) Please clearly mention the way to get the interrupt by Rx error on RGMII mode.

3) Which bit feal is available to know the status of Rx error on RGMII mode?

over 2 years ago

0 Nilabh Anand over 2 years ago

TI__Mastermind 48960 points

Hi,

I have started looking into the issue. Allow me till Friday to get back on this.

0 Tsurumoto over 2 years ago in reply to Nilabh Anand

TI__Genius 15755 points

HI Anand, do you have any update?

0 Nilabh Anand over 2 years ago in reply to Tsurumoto

TI__Mastermind 48960 points

Hi Tsurumoto

RGMII RX_ERR notification is inband unlike MII mode which has a dedicated pin, it is indicated via RX_CTL and RXC input - RX_DV is sent on RXC rising and RX_ERR on RXC falling edge. MII allows counting multiple errors spanning across nibbles but RGMII mode probably going to throw only one error per frame.

I will come back with more input on this.

+1 Nilabh Anand over 2 years ago in reply to Nilabh Anand

TI__Mastermind 48960 points

RX_ERR has no effect on pushing data to ingress FIFOs It only flags an RX_ERR status bit in PRU R31 register. It is update to SW/FW to determine what to do with the packet.

0 Tsurumoto over 2 years ago in reply to Nilabh Anand

TI__Genius 15755 points

Thanks Nilabh!

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AM2434: Rx error on RGMII