单片机timer-创新互联

void Timer1Mode3Init()
{
 TH1 = 0xF8;                                       //(65536 - 2000) / 256; set 2ms interrupt
  TL1 = 0x30;                                     //(65536 - 2000) % 256;

 ET1 = 1;                 　　　　　　　　　//timer1 overflow interrupt
 TMOD |= 0x10 ;                               // timer1,mode 3
 TR1 = 1;                                          // timer 1 start
 }
//==================================================================================
//
// name : Timer1 Interrupt
//
// function :
// -
//
//==================================================================================

void timer1(void) interrupt 3  //Timer1 interrupt 3
{
   ET1 = 0;
   TH1 = 0xF8;                                       //(65536 - 2000) / 256; set 2ms interrupt
   TL1 = 0x30;                                       //(65536 - 2000) % 256;
   LEDCount++;
   ET1 = 1;
}

在中断里面没有重新设置装载TH1 TL1的值，在时间上进入的中断时间差33倍，为66ms,有点吓人。