ser.c

通过stc12c4052单片机与电脑通信

#include "STC12C4052AD.h"
#define uchar unsigned char
BYTE table[]={0x03,0x3F,0x4A,0x2A,0x36,0xA2,0x82,0x3B,0x02,0x22};
uchar c;
bit flag;
void ser() interrupt 4
{
RI=0;
c=SBUF;
flag=1;
}
void serinit()
{
TMOD=0x20;
TH1=0xfd;
TL1=0xfd;
SM0=0;
SM1=1;
REN=1;
TR1=1;
ES=1;
EA=1;
}
void display()
{
uchar i;
P3_7=0;
P3_5=1;
switch(c)
{
case 0x30:i=0;break;
case 0x31:i=1;break;
case 0x32:i=2;break;
case 0x33:i=3;break;
case 0x34:i=4;break;
case 0x35:i=5;break;
case 0x36:i=6;break;
case 0x37:i=7;break;
case 0x38:i=8;break;
case 0x39:i=9;break;
}
P1=table[i];
//for( j=0;j<1000;j++);//延时
}
void main()
{
unsigned long j;
serinit();
for(j=0;j<300000;j++);
//while(1);
P1M0 = 0x00;  //0 1 2 3  4 5 6 7 output
P1M1 = 0xFF;  //  
P3M0 = 0x00;   //0101 1111
P3M1 = 0xFF;   //1010 0000ini_time0();
while(1)
{
//for(j=0;j<500000;j++);
display();
if(flag==1) //判断是否完成接收
{
flag=0;
ES=0; //串口中断关闭
SBUF=c; //将原先发送的值给缓存器(接发都是同一个,但意义不一样)
while(!TI); //判断是否发送完成
TI=0; //是则硬件清0
ES=1; //再次打开串口中断   
}						 
}
}