/*
实验说明：中断唤醒睡眠实验，分别介绍三种睡眠模式下的唤醒
*/

#include <ioCC2430.h>

 LED_ON  0#define led1 P1_0          #define led2 P1_1          #define led3 P1_2          #define led4 P1_3    

/*系统时钟初始化
-------------------------------------------------------*/
void xtal_init(void)
{
SLEEP &= ~0x04; //都上电
while(!(SLEEP & 0x40)); //晶体振荡器开启且稳定
CLKCON &= ~0x47; //选择32MHz 晶体振荡器
SLEEP |= 0x04;
}

/*LED初始化
-------------------------------------------------------*/
void led_init(void)
{
P1SEL = 0x00; //P1为普通 I/O 口
P1DIR |= 0x0F; //P1.0 P1.1 P1.2 P1.3 输出

led1 = LED_OFF; //关闭所有LED
led2 = LED_OFF;
led3 = LED_OFF;
led4 = LED_OFF;
}

/*外部中断初始化
-------------------------------------------------------*/
void io_init(void)
{
P0INP &= ~0X02; //P0.1有上拉、下拉

EA = 1; //总中断允许

IEN1 |= 0X20; // P0IE = 1，P0中断使能

PICTL |= 0X09; //P0.1允许中断，下降沿触发

P0IFG &= ~0x02; //P0.1中断标志清0
}

/*睡眠定时器中断初始化
-------------------------------------------------------*/
void sleepTimer_init(void)
{
STIF=0; //睡眠定时器中断标志清0

STIE=1; //开睡眠定时器中断

EA=1; //开总中断
}

/*设置睡眠定时器的定时间隔
-------------------------------------------------------*/
void setSleepTimer(unsigned int sec)
{
unsigned long sleepTimer = 0;

sleepTimer |= ST0; //取得目前的睡眠定时器的计数值
sleepTimer |= (unsigned long)ST1 << 8;
sleepTimer |= (unsigned long)ST2 << 16;

sleepTimer += ((unsigned long)sec * (unsigned long)32768); //加上所需要的定时时长

ST2 = (unsigned char)(sleepTimer >> 16); //设置睡眠定时器的比较值
ST1 = (unsigned char)(sleepTimer >> 8);
ST0 = (unsigned char)sleepTimer;
}

/*选择电源模式
-------------------------------------------------------*/
void PowerMode(unsigned char mode)
{
if(mode<4)
{
SLEEP &= 0xfc; //将SLEEP.MODE清0
SLEEP |= mode; //选择电源模式
PCON |= 0x01; //启用此电源模式
}
}

/*延时函数
-------------------------------------------------------*/
void Delay(unsigned int n)
{
unsigned int i,j;
for(i=0;i<n;i++)
for(j=0;j<1000;j++);
}

/*主函数
-------------------------------------------------------*/
void main(void)
{
xtal_init();
led_init();

//PM0状态，亮灯并延时
led1 = LED_ON; //亮LED1，表示统在PM0模式工作
Delay(10);

//PM1状态，灭灯
setSleepTimer(1); //设置睡眠定时器的定时间隔为1s
sleepTimer_init(); //开睡眠定时器中断
led1 = LED_OFF;
PowerMode(1); //设置电源模式为PM1

//1s后，由PM1进入PM0，亮灯并延时
led1 = LED_ON;
Delay(50);

//PM2，灭灯
setSleepTimer(2); //设置睡眠定时器的定时间隔为2s
led1 = LED_OFF;
PowerMode(2); //设置电源模式为PM2

//2s后，由PM2进入PM0，亮灯并延时
led1=0;
Delay(50);

//PM3，灭灯
io_init(); //初始化外部中断
led1 = LED_OFF;
PowerMode(3); //设置电源模式为PM3

//当外部中断发生时，由PM3进入PM0，亮灯
led1 = LED_ON;

while(1);
}

/*外部中断服务程序
-------------------------------------------------------*/
#pragma vector = P0INT_VECTOR
__interrupt void P0_ISR(void)
{
EA = 0; //关中断

Delay(50);

if((P0IFG & 0x02 ) >0 ) //按键中断
{
P0IFG &= ~0x02; //P0.1中断标志清0
}
P0IF = 0; //P0中断标志清0

EA = 1; //开中断
}

/*睡眠定时器中断服务程序
-------------------------------------------------------*/
#pragma vector= ST_VECTOR
__interrupt void sleepTimer_IRQ(void)
{
EA=0; //关中断

STIF=0; //睡眠定时器中断标志清0

EA=1; //开中断
}