main.c

led控制

#include <REGX52.H>
static unsigned char i;
void main()
{
 i=0;
 RCAP2H=0xF0;
 RCAP2L=0x00;
 TR2=1;
 ET2=1;
 EA=1;
 while(1);
}

void time2() interrupt 5
{
// TH2=0xFF;
// TL2=0x00;
 TF2=0;
 i++;
 if(i==30)
 	P3_0=~P3_0;
}