定时50us#include void main(void){ TMOD = 0x02; TH0 = 0x00; TL0 = 0x0CE; EA = 1; ET0 = 1; TR0 = 1; while(1);}void Timer0Interrupt(void) interrupt 1{ TH0 = 0x00; TL0 = 0x0CE; P1^0=~P1^0;}