void UARTinit ()
{
   unsigned int temp;

   LPC_PINCON->PINSEL0 = (LPC_PINCON->PINSEL0 & ~0xF0) | 0x50;           
   UART->LCR = (UART->LCR & ~0xFF) | 0x83;
   UART->DLM = 0;
   UART->DLL = 5;
   UART->FDR = 0xE5;
   UART->LCR &= ~(1<<7);            //DLAB    
   UART->FCR = 0xF;


   NVIC_SetPriority(UART0_IRQn, 0x04);   
   temp = UART->LSR;      
   NVIC_EnableIRQ(UART0_IRQn);            //enable UART interrupt
   UART->IER |= (1 << 1);      //THRE interrupt enable

   UART->THR = 0xAA;
   UART->THR = 0xAA;
   UART->THR = 0xAA;
}

void UART0_IRQHandler ()
{

         LPC_GPIO0->FIOSET    = 0xFFFFFFFF; 

}