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AM2634: AM2634 about PRU/Ethercat/CPSW questions

Zane Wei
Intellectual 1195 points
Part Number: AM2634

Hi Team,

My customer have a lot of questions about AM2634 about PRU/Ethercat/CPSW

1. Can the 100 Gigabit EtherCat of AM2634 use the PHY of the 100Base-T1 in the vehicle?
2. What is the relationship between CPSW and PRU, and can it be used in cascade? When cpsw detects an EtherCat frame, the integrated switch of the 2634 forwards the EtherCat frame to the internal PRU for processing, and then forwards the processed frame to the integrated switch through the internal mode after the PRU processes the EtherCat, and then forwards the processed frame to the integrated switch through some internal mode after the PRU processes the EtherCat, and then forwards the switch to the external through Gigabit T1

Best Regards,

Zane

  • 0
    TI__Expert 7045 points

    Hi Zane,

    Could you provide some details on customer use case here?

    CPSW and ICSS are two separate IPs. CPSW supports upto 1G Switch / MAC . ICSSM which we have in AM263 can supports Ethercat Device as of today. We will add more protocols in future. 

    Regards,
    Prajith

  • 0 in reply to Prajith Jayarajan
    Prodigy 10 points

    We expect to run both EtherCat and EtherNet (TCPIP) on the same network. We expect that when the AM2634 receives an EtherCat frame, it will use the PRU to read and write the EtherCat frame on the fly. When it receives EtherNet frames, AM2634 will perform switch forwarding processing on the message as a normal message. 

    Can AM2634 achieve the above behavior through certain configuration?Does TI have a solution that can implement the above communication methods?

    Best Regards

    Shukun

  • 0 in reply to Shukun Wang
    TI__Mastermind 44561 points
    Shukun Wang said:
    Does TI have a solution that can implement the above communication methods?

    No, TI does not. EtherCAT and standard ethernet switching won't mix. You may be able to implement something by dynamically loading firmware and application depending on the packet seen. https://www.ti.com/lit/ug/tidua28a/tidua28a.pdf has a demonstration of concept (again not supported)