Timer Interrupt issue when in while (1);

Dear all,

I have tried LM4F232 evaluation board to develop my application, registered the interrupt for timer0A & UART in startup_ccs.c

UART interrupt is triggered when receive data from PC.

Timer0A is listening the peripheral devices such as usb, keyboard, mouse move,...

I write down the following code for Timer0A , and then UART cannot receive any interrupt anymore.

How could I receive UART interrupt when Timer0A do the following code? I know is while loop issue, is there any method to solve this issue? Thank you :)

void timer_main_initial(void)
{
    SysCtlPeripheralEnable(SYSCTL_PERIPH_TIMER0);
    TimerLoadSet(TIMER0_BASE, TIMER_A, (SysCtlClockGet()));
    TimerConfigure(TIMER0_BASE, TIMER_CFG_16_BIT_PAIR | TIMER_CFG_A_PERIODIC);
    IntMasterEnable();
    TimerIntEnable(TIMER0_BASE, TIMER_TIMA_TIMEOUT);
    IntEnable(INT_TIMER0A);
    TimerEnable(TIMER0_BASE, TIMER_A);
}

void timer_main_closing(void)
{
    IntDisable(INT_TIMER0A);
    TimerIntDisable(TIMER0_BASE, TIMER_TIMA_TIMEOUT);
    TimerIntClear(TIMER0_BASE, TIMER_TIMA_TIMEOUT);
}

void timer_main(void)
{
    while (1){
        //Listen peripheral devices
        
    }
    TimerIntClear(TIMER0_BASE, TIMER_TIMA_TIMEOUT);
}