PCON寄存器实验报告

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实验名称：pcon，进入休眠模式实验

实验目的：用定时器显示数码管的前两位，当计数到5时使单片机进入休眠模式，同时关闭计时器，当单片机相应外部中断后，从休眠模式返回，同时启动计时器，数码管继续计数。

实验备注：当PCON=0x01时进入休闲模式，定时器不会停止，从而引发中断，所以要设置ET0关闭中断，当PCON=0x02时进入掉电模式，定时器停止，不会引起中断的发生，数码管停止计数。

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#include

#define uchar unsigned char

#define uint unsigned int

sbit duan = P2^6;

sbit wei = P2^7;

uchar shi,ge,num,num1;

uchar code duan_table[]=

{0x3f,0x06,0x5b,0x4f,

 0x66,0x6d,0x7d,0x07,

 0x7f,0x6f,0x77,0x7c,

 0x39,0x5e,0x79,0x71};

uchar code wei_table[]=

{0xfe,0xfd,0xfb,

 0xf7,0xef,0xdf};

void delay_1ms(uchar);

void display(uchar, uchar);

void main()

{

shi = 0;

ge = 0;

num = 0;

TH0 = (65536-46080)/256;

TL0 = (65536-46080)%256;

TMOD = 0x01;

EA = 1;

ET0 = 1;

EX0 = 1;

EX1 = 1;

TR0 = 1;

while(1)

{

if(num == 20)

{

num = 0;

num1++;

if(num1 == 6)

{

// ET0 = 0;

PCON = 0x02;

}

shi = num1/10;

ge = num1%10;

}

display(shi,ge);

}

}

void delay_1ms(uchar x)

{

uchar i, j;

for(i =0; i < x; i++)

for(j = 0; j < 110; j++);

}

void display(uchar shi, uchar ge)

{

duan = 1;

P0 = duan_table[shi];

duan = 0;

P0 = 0xff;

wei = 1;

P0 = wei_table[0];

wei = 0;

delay_1ms(1);

duan = 1;

P0 = duan_table[ge];

duan = 0;

P0 =0xff;

wei = 1;

P0 = wei_table[1];

wei = 0;

delay_1ms(1);

}

void Timer0() interrupt 1

{

TH0 = (65536-46080)/256;

TL0 = (65536-46080)%256;

num++;

}

void Ex_int0() interrupt 0

{

PCON = 0;

// ET0 = 1;

}

void Ex_int1() interrupt 2

{

PCON = 0;

// ET0 = 1;

}