[参考译文] TM4C1290NCPDT：需要[SDK]支持

//*****************************************************************************
//
// The UART interrupt handler.
//
//*****************************************************************************
void
UARTIntHandler(void)
{
    uint32_t ui32Status;

    //
    // Get the interrrupt status.
    //
    ui32Status = MAP_UARTIntStatus(UART0_BASE, true);

    //
    // Clear the asserted interrupts.
    //
    MAP_UARTIntClear(UART0_BASE, ui32Status);

    //
    // Loop while there are characters in the receive FIFO.
    //
    while(MAP_UARTCharsAvail(UART0_BASE))
    {
        //
        // Read the next character from the UART and write it back to the UART.
        //
        MAP_UARTCharPutNonBlocking(UART0_BASE,
                                   MAP_UARTCharGetNonBlocking(UART0_BASE));

        //
        // Blink the LED to show a character transfer is occuring.
        //
        MAP_GPIOPinWrite(GPIO_PORTN_BASE, GPIO_PIN_0, GPIO_PIN_0);

        //
        // Delay for 1 millisecond.  Each SysCtlDelay is about 3 clocks.
        //
        SysCtlDelay(g_ui32SysClock / (1000 * 3));

        //
        // Turn off the LED
        //
        MAP_GPIOPinWrite(GPIO_PORTN_BASE, GPIO_PIN_0, 0);
    }
}