Question

单片机怎么修改蜂鸣器延迟 让它多响会呢

void main (void)
{
init1();
i=0;
t=0;
SPK=1;
while(1)
{
if(flag==1)
{
if(a==0)
{
SPK=0;
delay(500000);
delay(500000);
SPK=1;
delay(500000);
delay(500000);

Answer 1

多响一会，循环几次就可以了。

void main (void)
{
char j; //增加一个变量j
init1();
i = 0;
t = 0;
SPK = 1;
while(1) {
if(flag == 1) {
if(a == 0) {
for(j = 0; j < 100; j++) {//循环
SPK = 0; delay(500);//发音
SPK = 1; delay(500);
}
}
}
}
}