定時(shí)器定時(shí)1ms子程序

void Timer0IntRoute( void ) interrupt 1
{

TL0 = -1000;//由于TL0只有8bits，所以將（-1000）低8位賦給TL0
TH0 = (-1000)>>8;//取（-1000）的高8位賦給TH0，重新定時(shí)1ms

……;
}

void Timer0Init( void )
{
TMOD=(TMOD & 0xf0) | 0x01;//初始化，定時(shí)器T0，工作方式1
//定時(shí)1ms
TH0 = (-1000)>>8;
TL0 = -1000;
TR0 = 1;//允許T0開(kāi)始計(jì)數(shù)
ET0 = 1;//允許T0計(jì)數(shù)溢出時(shí)產(chǎn)生中斷請(qǐng)求
EA=1;
}

void main()

{

Timer0Init( );

while(1);

}