今天入手了LPC1766，完全的寄存器操作和比较了STM32，LPC比较合适直接寄存器操作。今天学习成果如下（基于周立功LPC1766板）：

/****************************************Copyright (c)****************************************************
**                            Guangzhou ZLGMCU Development Co., LTD
**--------------File Info---------------------------------------------------------------------------------
** File name:           main.c
** Last modified Date:  2010-09-28
** Last Version:        V1.0
** Descriptions:        The main() function example template
**
**--------------------------------------------------------------------------------------------------------
** Created by:          Lan wuqiang
** Created date:        2010-09-28
** Version:             V1.00
** Descriptions:        整理模板，添加用户应用程序
**
**--------------------------------------------------------------------------------------------------------
** Modified by:        
** Modified date:      
** Version:            
** Descriptions:       
**
**--------------------------------------------------------------------------------------------------------
** Modified by:       
** Modified date:     
** Version:           
** Descriptions:      
**
** Rechecked by:
*********************************************************************************************************/
#include "LPC17xx.h"                                                    /* LPC17xx外设寄存器            */

/*********************************************************************************************************
  变量与宏定义
*********************************************************************************************************/
#define BEEP        (1 << 11)                                           /* P0.11连接蜂鸣器              */
#define KEY1        (LPC_GPIO2->FIOPIN & (1 << 10))                     /* P2.10连接KEY1                */
#define KEY2        (LPC_GPIO2->FIOPIN & (1 << 11))                     /* P2.11连接KEY2                */  
#define KEY3  (LPC_GPIO2->FIOPIN & (1 << 12))      /* P2.12连接KEY3                */
#define KEY4  (LPC_GPIO2->FIOPIN & (1 << 13))                     /* P2.13连接KEY4                */

#define BEEPOFF()   LPC_GPIO0->FIODIR |= BEEP;LPC_GPIO0->FIOSET |= BEEP /* 蜂鸣器关                     */
#define BEEPON()    LPC_GPIO0->FIODIR |= BEEP;LPC_GPIO0->FIOCLR |= BEEP /* 蜂鸣器开                     */
#define LED1        (1 << 0)                                            /* P2.0连接LED1                 */
#define LED2        (1 << 1)                                            /* P2.1连接LED2                 */
#define LED3        (1 << 2)                                            /* P2.2连接LED3                 */
#define LED4        (1 << 3)                                            /* P2.3连接LED4                 */
#define LED1OFF()   LPC_GPIO2->FIODIR |= LED1;LPC_GPIO2->FIOSET |= LED1 /* LED1关                       */
#define LED1ON()    LPC_GPIO2->FIODIR |= LED1;LPC_GPIO2->FIOCLR |= LED1 /* LED1开                       */
#define LED2OFF()   LPC_GPIO2->FIODIR |= LED2;LPC_GPIO2->FIOSET |= LED2 /* LED2关                       */
#define LED2ON()    LPC_GPIO2->FIODIR |= LED2;LPC_GPIO2->FIOCLR |= LED2 /* LED2开                       */
#define LED3OFF()   LPC_GPIO2->FIODIR |= LED3;LPC_GPIO2->FIOSET |= LED3 /* LED1关                       */
#define LED3ON()    LPC_GPIO2->FIODIR |= LED3;LPC_GPIO2->FIOCLR |= LED3 /* LED1开                       */
#define LED4OFF()   LPC_GPIO2->FIODIR |= LED4;LPC_GPIO2->FIOSET |= LED4 /* LED2关                       */
#define LED4ON()    LPC_GPIO2->FIODIR |= LED4;LPC_GPIO2->FIOCLR |= LED4 /* LED2开                       */

/*********************************************************************************************************
** Function name:       GPIOInit
** Descriptions:        GPIO初始化
** input parameters:    无
** output parameters:   无
** Returned value:      无
*********************************************************************************************************/
void GPIOInit (void)
{
    LPC_PINCON->PINSEL0 &= ~(0x03 << 22);                               /* 配置P0.11为GPIO              */
    LPC_PINCON->PINSEL4 &= 0XF00FFF00;                                  /* 配置P2.0~P2.3和P2.10~P2.13为GPIO*/

    LPC_GPIO0->FIODIR |= BEEP;                                          /* 配置P0.11即BEEP为输出  1     */
    LPC_GPIO2->FIODIR |= 0X000000FF;         /* 配置P2.0~P2.3为输出     1    */
    LPC_GPIO2->FIODIR &= 0XFFC3FFFF;         /* 配置P2.10~P2.13为输入   0    */

}

/*********************************************************************************************************
** Function name:       main
** Descriptions:        用户程序入口函数，将JP17短接，P0.11脚控制蜂鸣器，
**                      将JP4的KEY1与P2_10短接，每按下KEY1，蜂鸣器响一声
** input parameters:    无
** output parameters:   无
** Returned value:      无
*********************************************************************************************************/
int main (void)
{
    SystemInit();                                                       /* 系统初始化                   */
   
    GPIOInit(); 

    while (1) {
        if (KEY1 == 0) {                          /* 如果KEY1按下，蜂鸣器鸣叫     */
            BEEPON();
   LED1ON();
        } else {                                                        /* 松开则停止蜂鸣               */
            BEEPOFF();
   LED1OFF();
        }
        if (KEY2 == 0) {                          /* 如果KEY2按下，LED2亮     */
   LED2ON();
        } else {                                                        /* 松开则LED2灭               */
   LED2OFF();
        }
        if (KEY3 == 0) {                          /* 如果KEY3按下，LED3亮     */
   LED3ON();
        } else {                                                        /* 松开则LED3灭               */
   LED3OFF();
        }
        if (KEY4 == 0) {                          /* 如果KEY4按下，LED4亮     */
   LED4ON();
        } else {                                                        /* 松开则LED4灭               */
   LED4OFF();
        }
    }
}

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