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Light IP: TCP message size > 1460

Zvi Vered
Expert 2000 points

Hello,

I'm running light IP supplied in TivaWare 2.0.

TCP message is handled in the following callback:

static err_t server_recv_handler (void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err)
{
	if ((err != ERR_OK) || (p == NULL) || (arg == NULL))
	{
	    /* error or closed by other side? */
	    if (p != NULL) {
	      /* Inform TCP that we have taken the data. */
	      tcp_recved(pcb, p->tot_len);
	      pbuf_free(p);
	    }
	}

	host_handle_msg (pcb,p->payload,p->tot_len);

	/* Inform TCP that we have taken the data. */
	tcp_recved(pcb, p->tot_len);

	return ERR_OK;;
}

In the handler I'm calling to "host_handle_msg " to do some work. 

But it seems that if the handling of the message takes a long time and another TCP message is received, it runs over the message currently handled

What am I doing wrong ?

Thanks,
Zvika
  • 0
    TI__Expert 3720 points

    Zvika.

    The question is not clear here as it goes as part of the code itself so I am posting it here again:

     

    In the handler I'm calling to "host_handle_msg " to do some work.

    But it seems that if the handling of the message takes a long time and another TCP message is received, it runs over the message currently handled

    What am I doing wrong ?

    Thanks,
    Zvika

  • 0 in reply to Shai Aharonov1
    TI__Expert 3720 points

    Zvika.

    Below is the answer for the experts:

     

    It is still not clear what example is being referred to? We would need the following info

    1. TIVAWare 2.0 is being used by customer, did they check the same on 2.1.0 release

    2. There is a known issue of Ethernet Stack sometimes not working with Flash Prefetch ON. The user code can set the Flash Prefect Buffer OFF and see if the issue is there or not?

    Based on the feedback on the above two points we can investigate further.

    BR

    Shai A

  • 0 in reply to Shai Aharonov1
    Expert 2000 points

    Hi Shai,

    1. With 2.1.0.12573 I failed to get any connection.

    2. How can I set " Flash Prefetch OFF" ?

    Thanks,

    Zvika

  • 0 in reply to Zvi Vered
    TI__Guru**** 244400 points

    Hello Zvika,

    TIVAware 2.1.0 is built on top of 2.0.1 and it must be compatible for the execution model.

    For the second point it is the FLASHCONF register at absolute address 0x400FDFC8 and FPFOFF is bit-16 for which you can do the following before Ethernet is enabled

    HWREG(0x400FDFC8) |= 0x10000;

    Regards

    Amit

  • 0 in reply to Amit Ashara
    Expert 2000 points

    Hello,

    I tried calling "HWREG(0x400FDFC8) |= 0x10000;" right after  calling to

    SysCtlClockFreqSet.

    But problem remains the same.

    Thanks,

    Zvika