main.c

来自「完整的周立功公司的LPC213X开发板的光盘内容」· C语言 代码 · 共 62 行

/****************************************Copyright (c)**************************************************
**                               Guangzou ZLG-MCU Development Co.,LTD.
**                                      graduate school
**                                 http://www.zlgmcu.com
**
**--------------File Info-------------------------------------------------------------------------------
** File name:			main.c
** Last modified Date:  2004-09-16
** Last Version:		1.0
** Descriptions:		The main() function example template
**
**------------------------------------------------------------------------------------------------------
** Created by:			Chenmingji
** Created date:		2004-09-16
** Version:				1.0
** Descriptions:		The original version
**
**------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
** Version:
** Descriptions:
**
********************************************************************************************************/
#include "config.h"

#define 	BEEP	1 << 7			// P0.7控制BEEP

/*
********************************************************************************************************
** 函数名称: main
** 功能描述: RTC中断唤醒掉电CPU实验。
********************************************************************************************************
*/
int main (void)
{
    IO0DIR = BEEP;
    IO0SET = BEEP;
    
    /* RTC初始化 */
    CCR   = 0x12;                   // 使用独立振荡器
    CIIR  = 0x01;				    // 设置秒值的增量产生一次中断
    ILR   = 0x03;                 	// 清除增量中断标志
    CCR   = 0x11;				    // 启动RTC
    INTWAKE = 1 << 15;            	// 允许RTC唤醒CPU

    while(1)
    {
        PCON = 0x02;                // CPU进入掉电模式
        ILR = 0x01;                 // 清除增量中断标志
        
        /* 取反BEEP状态 */
        if((IO0SET & BEEP) == 0) IO0SET = BEEP;
        	else IO0CLR = BEEP;
    }
    
    return 0;
}
/*********************************************************************************************************
**                            End Of File
********************************************************************************************************/