CCS console input without halting system

Hi, everybody.

I'm using DM8148evm, CCS 5.2, and sys/bios 6.33.5.46.

I implemented console diagnostic mode task which is based on <stdio.h> console input and System_printf() console output.

The source code of this Diag_Task is as follows:

===============================================================================================

#include <ti/sysbios/knl/Task.h>
#include <xdc/runtime/System.h>

#include <stdio.h>
#include <stdlib.h>

Task_Handle DiagTask_Handle;

void Diag_Task()
{
 char diag_cmd[15];

 for(;;)
 {
  System_printf("C>:");
  fgets(diag_cmd, sizeof(diag_cmd), stdin);
  diag_cmd[strlen(diag_cmd)-1] = '\0';
  fflush(stdin);

  if(strcmp(diag_cmd, "Command1") == 0)
  {

          ........
   }
  if(strcmp(diag_cmd, "Command2") == 0)
  {

        ..........
    }
  } // for(;;)
}

========================================================================================

If I execute this program in CCS Jtag emulation mode, I can input string through console window.

However, interrupt service routine function is not called, when executing this program.

I setup the GPIO interrupt. If I delete the Diag_Task code, the ISR is called correctly.

Is is possible to receive CCS console input without halting system ?

How can I make the ISR called, while waiting the console input ?

Thank you.