蜂鸣器02.c

来自「89s51的c51源程序」· C语言 代码 · 共 40 行

#include<AT89X51.h>
unsigned char i;
void delay(unsigned char t,k);
main()
{
while(1)
{

P3_0=0;
delay(10,20);
P3_0=1;

P0_0=0;
P0_1=1;
delay(10,200);

P3_0=0;
delay(10,20);
P3_0=1;

P0_0=1;
P0_1=0;
delay(10,200);





}
}

void delay(unsigned char t,k)//延时子程序
{
while(--k)
{
while(--t);
}
}