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RTOS/AM4378: Ethernet interrupt

Dionisio Vian
Prodigy 70 points
Part Number: AM4378


Tool/software: TI-RTOS

Hello.

I am using SKAM437x and I have compiled "NIMU_BasicExample_skAM437x_armExampleproject" project. The project works correctly, and I can do a ping and see the reply from the SK in my laptop.

Now, with this example project, how could I generate an interrupt when the SK receive a packet through ethernet connection in an specific port?

Is there any other example to do something like that?

Thankyou.

Regards.

  • 0
    TI__Guru**** 393215 points
    The RTOS team have been notified. They will respond here.
  • 0 in reply to Biser Gatchev-XID
    TI__Expert 7570 points
    Hi

    The AM437x CPSW is not able to provide separate interrupts for receiving data on different ports.
    As described in the AM437x AM437x Sitara Processors Technical Reference Manual at www.ti.com/.../technicaldocuments
    - the CPSW core provides 4 interrupts outputs to the ARM
    These are the RX_THRESH (3PGSWRXTHR0) – Receive Threshold interrupt (nonpaced)
    RX (3PGSWRXINT0) – Receive interrupt (paced)
    TX (3PGSWTXINT0) – Transmit interrupt (paced)
    Misc (3PGSWMISC0) – Other interrupts

    David
  • 0 in reply to David Zaucha
    Prodigy 50 points

    Hi.

    Thanks for the answer.

    The idea is to respond to a message sent on specific tcp/ip port. So I could generate an interrupt for every tcp/ip packet, analize the port and generate the answer accordingly.

    It is possible to do that wiht NDK library? 
    Is there any way to generate a high level interrupt with the NDK packet instead of using the low level interrupt when a tcp/ip packet arrives?

    Regards.

  • 0 in reply to Dinoisio Vian
    TI__Expert 7570 points
    Hi Dionisio

    There is an example to implement this operation although the example still relies upon the low level interrupts.

    PDK_1_0_5 uses ndk_2_25_00_09 .

    The NDK user Guide is contained the document directory C:\ti\ndk_2_25_00_09\docs.
    In section 3.3 on page 59 there is a TCPIP echo sockets example. This code creates a socket, connects to port 7, sends some data, and then tries to receive it back.

    Let me know if this will work for you.

    David
  • 0 in reply to David Zaucha
    Prodigy 50 points

    Hi.

    Thanks for your comments.

    I have used the function 

    hEcho = DaemonNew( SOCK_STREAMNC, 0, 7, dtask_tcp_echo, OS_TASKPRINORM, OS_TASKSTKNORM, 0, 3 );

    This function works fine for me. Still I have some doubts. With this function dtask_tcp_echo function is called when a packet is received at port 7, but this call is made by pooling or by interrupt?

    I want to design a system that receives packets in 4 different ports. Packets can be received a high speed at all the ports. Could I manage all the data creating 4 functions with DaemonNew? 
    Could handle data received at gb speed?

    Thanks.

    Regards.