额,想用while写小灯循环,可是发现这样写直接进死循环了,没有返回值,也就改变不了频率了。求助求助
#include<intrins.h>
typedef unsigned char u8;
typedef unsigned int u16;
u8 i;
sbit led=P0^0;
void delay(u16 a)
{
while(a--);
}
void UsartInit()
{
SCON=0X50;
TMOD=0X20;
PCON=0X80;
TH1=0XF3;
TL1=0XF3;
ES=1;
EA=1;
TR1=1;
}
void Uart() interrupt 4
{
u8 receiveData;
i=SBUF;
switch(i)
{
case'0':led=0;break;
case'1':led=1;break;
case'2':
{
while(1)
{
led=0;
delay(45000);
led=1;
delay(45000);
}
break;
}
case'3':
{
while(1)
{
led=0;
delay(25000);
led=1;
delay(25000);
}
break;}
case'4':
{
while(1)
{
led=0;
delay(15000);
led=1;
delay(15000);
}
break;
}
}
receiveData=SBUF;
RI=0;
SBUF=receiveData;
while(!TI);
TI=0;
}
void main()
{
UsartInit();
while(1);
}