Interrupt
The timer is the most basic functional device of the 51 single-chip microcomputer, and it is very important to master its programming method;
#include #include unsigned char n=0,f=0,s=0; void main() { TMOD=0X61; TH0=(65536-9216)/256; TL0=(65536-9216)%256; initialize the timer TH1=156; TL1=156; IT0=1; EX0=1; EA=1; T1=0; while(1)P1=s; } void Timer0() interrupt 1 { T1=1; TH0=(65536-9216)/256; TL0=(65536-9216)%256; T1=0; } void Timer1() interrupt 3 { s++; } void interrupt1(void) interrupt 0 { if(f==0){ TR1=1;TR0=1; ET1=1;ET0=1; f=1; } else if(f==1) { TR1=0;TR0=0; ET1=0;ET0=0; f=0; } }
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