Microcontroller buzzer_the generation of the Didi sound-EEWORLD

Collect

#include

unsigned int t02s;

bit flag;

sbit P1_5=P1^5;

void main(void)

{

TMOD=0x01;

TH0=(65536-500)/256;

TL0=(65536-500)%6;

TR0=1;

ET0=1;

EA=1;

while(1);

}

void t0(void) interrupt 1 using 0//0.5MS timer interrupt subroutine

{

TH0=(65536-500)/256;

TL0=(65536-500)%6;

t02s++;

if(t02s==400)//200MS timing

{

t02s=0;

flag=~flag;

}

if(flag==0)

P1_5=~P1_5;

}

Reference address：Microcontroller buzzer_the generation of the Didi sound

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