The idea of using timer interrupt in 51 single-chip microcomputer 1

1. Turn on global interrupt EA = 1 
2. Corresponding interrupt enable such as timer 1 ET1 = 1, timer 0 ET0 = 1 
3. Timer working mode configuration: There are three ways, dual 8-bit timing, 16-bit timing and capture mode There are 4 types of timer 2. TMOD is a register configured by timer 0 and timer 1. TMOD = 0x01, timer 0 works in mode 1 (16-bit counting) 
4. Turn on timer TR0 = 1; timing When device 1 is turned on, TR1 = 1; 
5. Interrupt service routine : It is the transaction you want to process when the time is up. 
Example: //50ms timer 
void main(void) 
{ 
      TMOD = 0x01; //Configuration mode 
      TH0 = 0x3C; //Counting time 
      TL0 = 0xB0; 
      TR0 = 1; //Enable timer 
      EA = 1; //Enable global interrupt 
    ET0 = 1; //Turn on timer 0 interrupt 
    for(;;) 
} 

void Timer0_ISR(void) intterupt 1 // Interrupt service routine
 { 
      TH0 = 0x3C; //Count time 
    TL0 = 0xB0;

       P1 = 0x11; //The timing is up, the action to be performed 
}