TMS320F280049: Watchdog reset issue

Part Number: TMS320F280049
Other Parts Discussed in Thread: C2000WARE

Hi expert,

My customer want to do a watchdog reset after a boot loader.

and they enable watchdog reset and then wait for reset.

but they can see reset signal on the XRS pin, but the CPU is running away.

I just try to reproduce on TI controlcard.

and I did can only see a reset signal and can not found the LED toggle.

My code is really simple. just enable watchdog and wait for reset and toggle LED.

did I use watchdog wrong?

void main(void)
{
    //
    // Initialize device clock and peripherals
    //
    Device_init();

    //
    // Initialize GPIO and configure the GPIO pin as a push-pull output
    //
    Device_initGPIO();
    GPIO_setPadConfig(DEVICE_GPIO_PIN_LED1, GPIO_PIN_TYPE_STD);
    GPIO_setDirectionMode(DEVICE_GPIO_PIN_LED1, GPIO_DIR_MODE_OUT);
    //
    // Initialize PIE and clear PIE registers. Disables CPU interrupts.
    //
    Interrupt_initModule();

    //
    // Initialize the PIE vector table with pointers to the shell Interrupt
    // Service Routines (ISR).
    //
    Interrupt_initVectorTable();

    //
    // Enable Global Interrupt (INTM) and realtime interrupt (DBGM)
    //
    EINT;
    ERTM;
    GPIO_writePin(DEVICE_GPIO_PIN_LED1, 1);    // Turn on LED
    //
    // Set the watchdog to generate an interrupt signal or a reset signal
    //
    SysCtl_setWatchdogMode(SYSCTL_WD_MODE_RESET);
    //
    // Reset the watchdog counter
    //
    SysCtl_serviceWatchdog();

    //
    // Enable the watchdog
    //
    SysCtl_enableWatchdog();
    //
    // Loop Forever
    //
    while(1)
    {
        //
        // Turn off LED
        //
        GPIO_writePin(DEVICE_GPIO_PIN_LED1, 0);
        DEVICE_DELAY_US(500);
    }
}

BR

Emma