NDK not working occationally

Hi,

How are you validating NDK stack stopped sometime when using TCP?
Did you check with CCS, where is it hanging the code?
Might be this issue cause of memory, You can also create the new thread in TI-RTOS forum as per below link, so that you can get fast response from expert.
http://e2e.ti.com/support/embedded/tirtos/default.aspx
Right now I do not have the C6474 based board to test this issue. I can suggest if you provide some more details.

Hi,

How you tested and confirmed this issue? The IP address lost the ping while you sending the packets through TCP socket long time. I can suggest you to check with NDK helloworld example, this have configured the IP address for Board, you just run this example on EVM using CCS/Emulator, do not use UDP or TCP to send or receive the packet. Just ping the IP address, check the ping lost is there if yes, where it is halt the program.

Thanks for your reply !

For the second issue:

Now I check the second issue again, and found out that NDK does not response to ping after sending through TCP socket long time is cause by other tasks. Some of the task in my program will block in a loop and keep the DSP busy in that loop.Hence NDK naturally will not work.

But for the first issue,the problem remains:

Sometimes my NDK will not work and doesn't response to ping command. I use CCS to check which point the program is running. I found that it is either in Hwi_checkStack() at Hwi_statck.c or in ti_sysbios_knl_Idle_loop_E at Idle.c.
I try to unplug the ethernet cable and plug it again. The NDK doesn't reconnect the ethernet again.
This doesn't always happen. Sometimes it will work and sometimes it will fail.

Now  I ping the DSP 4 times, the first 3 times NDK response well. At the fourth time, the NDK failed to response. And I found that DSP is stuck in the code with red color below.

In ethdriver.c

void HwTxInt(void)
{
 Uint32 i;
 CSL_SemVal response;

    if (hEMAC)
    {
        i = EMAC_TxServiceCheck(hEMAC);

  if(i)
  {
   if (i == EMAC_ERROR_MACFATAL)
    emac_fatal_error++;
   else
    csl_errors++;
  }

  /* Check Whether Handle opened Successfully and then read module status*/
  if(hSemHandle1!= NULL)
  {
         /* Check whether semaphore resource is Free or not*/
        do {
             /* Get the semaphore*/
          CSL_semGetHwStatus(hSemHandle1,CSL_SEM_QUERY_DIRECT,&response);
         } while (response.semFree != CSL_SEM_FREE);

         /* write the EOI register */
   EMAC_txEoiWrite(coreNum);

      /* Release the semaphore*/
      CSL_semHwControl(hSemHandle1, CSL_SEM_CMD_FREE_DIRECT,NULL);
     }
    }

    return;
}