main.c

easyarm 的主要程序

/****************************************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:         Li Baihua
** Modified date:       2008-04-07
** Version:             1.1
** Descriptions:        RTC秒增量中断唤醒掉电CPU
**
*********************************************************************************************************/
#include "config.h"

#define 	LED     	(1 << 17) 			                              /*  P0.17控制LED              */

/*********************************************************************************************************
** Function name:		RTCInit
** Descriptions:		初始化实时时钟
** input parameters:    无
** output parameters:   无
** Returned value:      无
*********************************************************************************************************/
void RTCInit (void)
{
    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              */
}

/*********************************************************************************************************
** Function name:		main
** Descriptions:		RTC中断唤醒掉电CPU实验
** input parameters:    无
** output parameters:   无
** Returned value:      无
*********************************************************************************************************/
int main (void)
{   
    PINSEL1 = PINSEL1 & (~(0x03 << 2));
    IO0DIR = LED;
    IO0SET = LED;
    
    RTCInit ();                                                         /*  RTC初始化                   */

    while(1) {
        PCON = 0x02;                                                    /*  CPU进入掉电模式             */
        ILR = 0x01;                                                     /*  清除增量中断标志            */
        
        /* 
         * 唤醒CPU后，取反LED
         */
        if((IO0PIN & LED) == 0) {
            IO0SET = LED;
        }
        else IO0CLR = LED;
    } 
    return 0;
}
/*********************************************************************************************************
**                            End Of File
*********************************************************************************************************/