我想用电脑发送0xfe到单片机P1口。程如下：#include<reg52.h>
我想用电脑发送0xfe到单片机P1口。程如下：#include<reg52.h>#define uchar unsigned char
#define uint unsigned int
uchar a,b;
void main()
{
TMOD=0x20;
TH1=0xfd;
TL1=0xfd;
TR1=1;
SCON=0x50;
PCON=0;
EA=1;
ES=1;
ET1=1;
while(1)
{
if(b==1)
{
ES=0;
b=0;
SBUF=0xfe;
while(TI==0);
TI=0;
ES=1;
}
}
}
void ser() interrupt 4
{
RI=0;
P1=SBUF;
a=SBUF;
b=1;
}
现在P1不是我发送的数据呀，怎么办呢
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