C51 INT0 interrupt program-EEWORLD

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//INT0 interrupt program

#include
void delay(unsigned int x);

main()
{
IT0=1; //Falling edge trigger

EX0=1; //Open INT0 interrupt

EA=1;
P1=0xff;
while(1)
{ }
}

void int0() interrupt 0
{
    IT0=0; //disable interrupt,
   P1=~P1;
    delay(20000); //delay
    IT0=1; //enable interrupt
}

void delay(unsigned int x) //延时
{
unsigned int i;
for(i=0;i {}
}

Keywords：C51 INT0 Reference address：C51 INT0 interrupt program

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