gpio interrupt error in LCDKC6748

Hello,

I am using C6748 LCDK.

I want to use pin GP5[0] as a interrupt on falling  edge for that I write code

userswitch3();
     CONFIG_enable_user_switch3_interrupt();

void userswitch3(void)
{
    GPIODirModeSet(SOC_GPIO_0_REGS, 81, GPIO_DIR_INPUT);

}

void CONFIG_enable_user_switch3_interrupt(void)
{
    /*
    ** Configure rising edge and falling edge triggers on pin 81 to generate
    ** an interrupt
    */
    GPIOIntTypeSet(SOC_GPIO_0_REGS, 81, GPIO_INT_TYPE_FALLEDGE);

    /* Enable interrupts for Bank 5.*/
    GPIOBankIntEnable(SOC_GPIO_0_REGS, 5);

    /* Configuring the AINTC to handle interrupts.*/
    SetupInt();

    /* Configure GPIO interrupts */
    CONFIG_IntGPIO_user_switch3();
}

/*
** \brief  This function configures the AINTC to receive the GPIO interrupt.
*/

static void CONFIG_IntGPIO_user_switch3(void)
{
    // Configure GPIO interrupts for ARM or DSP

#ifdef _TMS320C6X
    // Register the ISR in the Interrupt Vector Table
    IntRegister(C674X_MASK_INT5, GPIO_user_switch3_Isr);

    // Map the system interrupt to the DSP maskable interrupt
    IntEventMap(C674X_MASK_INT5, SYS_INT_GPIO_B5INT);

    // Enable DSP maskable interrupt
    IntEnable(C674X_MASK_INT5);
#else
    // Register the ISR in the Interrupt Vector Table.
    IntRegister(SYS_INT_GPIOB5, GPIO_user_switch3_Isr);

    // Map the channnel number 2 of AINTC to GPIO BANK 5 system interrupt.
    IntChannelSet(SYS_INT_GPIOB5, 2);

    // Enable the System Interrupts for AINTC.
    IntSystemEnable(SYS_INT_GPIOB5);
#endif
}

void GPIO_user_switch3_Isr(void)
{




    /* Disable the interrupts for pins of bank 5 in GPIO.*/
    GPIOBankIntDisable(SOC_GPIO_0_REGS, 5);



#ifdef _TMS320C6X
    // Clear the system interrupt status in the DSPINTC
    IntEventClear(SYS_INT_GPIO_B5INT);
#else
    /* Clears the system interrupt status of GPIO in AINTC.*/
    IntSystemStatusClear(SYS_INT_GPIOB5);
#endif

    /* Clears the Interrupt Status of GP5[0] in GPIO.*/
    GPIOPinIntClear(SOC_GPIO_0_REGS, 81);



    //flag = 1;
   
   



    /* Enable interrupts for pins of bank 5.*/
    //GPIOBankIntEnable(SOC_GPIO_0_REGS, 5);

 
}

static void SetupInt(void)
{
    // Setup ARM or DSP interrupt controller

#ifdef _TMS320C6X
    // Initialize the DSP Interrupt Controller
    IntDSPINTCInit();

    // Enable DSP Interrupts Globally
    IntGlobalEnable();
#else
    /* Initialize the ARM Interrupt Controller.*/
    IntAINTCInit();

     /* Enable IRQ in CPSR.*/
    IntMasterIRQEnable();

    /* Enable the interrupts in GER of AINTC.*/
    IntGlobalEnable();

    /* Enable the interrupts in HIER of AINTC.*/
    IntIRQEnable();
#endif
}

But problem is that interrupt comes two times instead of one . Even after the execution of isr, no interrupt pending in INSTAT45 register and interrupt disable in BINTEN register.

Please give the some solution of that problem.

regards

Sachin Arora