intt0.c

单片机C源程序souce

#include <SST89V564.H>

extern unsigned char Dtime;

void INTT0(void) interrupt 1 using 3
{
TR0 = 0;
Dtime--;
TH0 = 0x4c;//Timing for 25ms.
TL0 = 0xf7;
TR0 =1;
}