单片机串口通信,通过电脑发送01,02。当发送01时LED小灯亮,同时数码管的显示加1。发送02时小灯灭,数码管不加。现在的问题是,小灯能够正常亮与灭,但数码管不正常显示。即传输数据没问题,但是数码管会乱码,数码管使用的是共阳。发送01,小灯亮,数码管从0变到了8。问题出在哪里?求大神指点
#include<reg51.h>
#define uchar unsigned char
sbit LED=P1^0;
unsigned char code SMG[]= {0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
unsigned char cnt=0;
uchar recv_dat;
void RESV()interrupt 4
{
RI=0;
recv_dat=SBUF;
SBUF=recv_dat;
while(TI==0);
TI=0;
}
void main()
{
TMOD=0X20;
TH1=TL1=0XFD;
PCON=0X00;
SCON=0X50;
ES=1;
EA=1;
TR1=1;
while(1)
{
if(recv_dat==0x01)
{
LED=0;
cnt++;
}
else if(recv_dat==0x02)
{
LED=1;
}
P0 =SMG[cnt];
}
}
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