File content as of revision 23:12e6183f04d4:

/****************************************************************************
 *   $Id:: uart.c 5751 2010-11-30 23:56:11Z usb00423                        $
 *   Project: NXP LPC17xx UART example
 *
 *   Description:
 *     This file contains UART code example which include UART initialization, 
 *     UART interrupt handler, and APIs for UART access.
 *
****************************************************************************/
#include "lpc17xx.h"
#include "uart.h"

#define FOSC                        12000000                            /*  Õñµ´Æ÷ƵÂÊ                  */

#define FCCLK                      (FOSC  * 8)                          /*  Ö÷ʱÖÓƵÂÊ<=100Mhz          */
                                                                        /*  FOSCµÄÕûÊý±¶                */
#define FCCO                       (FCCLK * 3)                          /*  PLLƵÂÊ(275Mhz~550Mhz)      */
                                                                        /*  ÓëFCCLKÏàͬ£¬»òÊÇÆäµÄżÊý±¶ */
#define FPCLK                      (FCCLK / 4)                          /*  ÍâÉèʱÖÓƵÂÊ,FCCLKµÄ1/2¡¢1/4*/
                                                                        /*  »òÓëFCCLKÏàͬ               */
/*****************************************************************************
** Function name:		UARTInit
**
** Descriptions:		Initialize UART port, setup pin select,
**						clock, parity, stop bits, FIFO, etc.
**
** parameters:			portNum(0 or 1) and UART baudrate
** Returned value:		true or false, return false only if the 
**						interrupt handler can't be installed to the 
**						VIC table
** 
*****************************************************************************/
void UART2_Init (void)
{
	uint16_t usFdiv;
    /* UART2 */
    LPC_PINCON->PINSEL0 |= (1 << 20);             /* Pin P0.10 used as TXD2 (Com2) */
    LPC_PINCON->PINSEL0 |= (1 << 22);             /* Pin P0.11 used as RXD2 (Com2) */

   	LPC_SC->PCONP = LPC_SC->PCONP|(1<<24);	      /*´ò¿ªUART2µçÔ´¿ØÖÆλ	           */

    LPC_UART2->LCR  = 0x83;                       /* ÔÊÐíÉèÖò¨ÌØÂÊ                */
    usFdiv = (FPCLK / 16) / 115200;            /* ÉèÖò¨ÌØÂÊ                    */
    LPC_UART2->DLM  = usFdiv / 256;
    LPC_UART2->DLL  = usFdiv % 256; 
    LPC_UART2->LCR  = 0x03;                       /* Ëø¶¨²¨ÌØÂÊ                    */
    LPC_UART2->FCR  = 0x06;
}

/*********************************************************************************************************
** Function name:       UART2_SendByte
** Descriptions:        ´Ó´®¿Ú2·¢ËÍÊý¾Ý
** input parameters:    data: ·¢Ë͵ÄÊý¾Ý
** output parameters:   ÎÞ
** Returned value:      ÎÞ
*********************************************************************************************************/
int UART2_SendByte (int ucData)
{
	while (!(LPC_UART2->LSR & 0x20));
    return (LPC_UART2->THR = ucData);
}

/******************************************************************************
**                            End Of File
******************************************************************************/