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#include<51.h>
#define uint unsigned int
#define uchar unsigned char
bit ti_flag=0,Led_new_flag=0,Pwm_off_on=0,time_10f_flag=0,P_IO_flag=0;time_20f_flag=0,NTC_ON_OFF_flag=0,Roie_flag;
volatile uint time_te_flag=0,count=0;Cont=0,j=0,s=0;
volatile uint T_PCA2,I_samp=0,I_vaue=0,Time_200us_flag=200;
volatile uint TIME_200ms_flag=0,TIME_ACC_flag=0; //LED閃所采集時間標志
volatile uchar num=0,Tim_1ms_flag=0;
volatile double ZKB;
sbit PM_out=P3^6;
/***********定時器0初始化***************/
void Init(void)
{
AUXR|=0x80; //定時器時鐘1T模式
TMOD|=0x00; //設置定時器模式
TL0=0xc4; //設置定時初值5US
TH0=0xff; //設置定時初值
TF0=0; //清除TF0標志
ET0=1;
EA=1;
TR0=1;
/***************定時器0****************/
void timer0(void) interrupt 1
{
Time_200us_flag--;
if(Time_200us_flag==0) //1ms
{
Time_200us_flag=200;
ti_flag=1;
keyScan(); //按鍵掃描
j++;
}
if(Pwm_off_on)
{
num++;
if(num>=2)
num=0;
if(num<ZKB) //產生PWM
PM_out=1;
else
{
PM_out=0;
}
}
}
/*************按鍵掃描及處理***************/
void keyScan()
{
static bit key1_lock=0;
static uchar count1=0;
if(0==key)
{
if((count1++>=25)&&(key1_lock==0)&&(PINT==1))//延時濾波25ms
{
key1_lock=1;
Pwm_off_on=~Pwm_off_on;
if(Pwm_off_on==0)
PM_out=0;
}
}
else
{
key1_lock=0;//按鍵自鎖標志清0
count1=0; //消抖計數清0
}
if(PINT==0)
{
Power=0;
}
}
/***************主程序****************/
void main(void)
{
Init();
while(1)；
}

復制代碼

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