51计数器进行计数实例

#include

bit flg= 0;//标志位
unsigned int counter = 0;//计数值

sbit LED = P1^1;

//T0初始化
void InitT0(void)
{
TMOD = 0x05;//T0计数工作方式1
TH0 = 0xff;
TL0 = 0xff;
EA= 1;
ET0 = 1;
TR0 = 1;
}

//T0中断服务子函数
void Time0_Int(void) interrupt 1
{
TH0 = 0xff;
TL0 = 0xff;
flg = 1;
}

void delay(volatile unsigned long cnt)
{
while(cnt--);
}

void main(void)
{
InitT0();

while(1){
P1_1 = 1;
while(!flg);
flg = 0;
counter = 1;//计算计数值
while(counter >0)
{
counter--;
LED = 0;
delay(10000);
LED = 1;
}
}

}