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標題: stc89c52單片機串口通信代碼 [打印本頁]

作者: hahaso 時間: 2018-11-19 17:07
標題: stc89c52單片機串口通信代碼
電腦發送一個字符；
返回一個字符串
兩個按鍵對應不同字符串發送
#include<reg51.h>
#include<math.h>
#define u8 unsigned char
sbit k3=P3^2;
  sbit k4=P3^3;
int x=2;
u8 shumaguang[19]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
void delay(int n)
{
while(n--);
}
void begin(void)             //初始函數
{
TMOD=0X20;
TH1=0XF3;
TL1=0XF3;
TR1=1;
PCON=0X80;
SCON=0X50;
ES=1;
IT1=1;
EX1=1;
  IT0=1;
EX0=1;
      EA=1;
}
void sendbyte(u8 ch) //發送單個字符
{
SBUF=ch;
while(!TI);
TI=0;
}
void sendstring(u8 *str)//發送字符串
{
while(*str)
{
sendbyte(*str++);
}
}
void sendstring2(u8 *str)//發送字符串  2
{
while(*str)
{
sendbyte(*str++);
}
}
void sendstring3(u8 *str)//發送字符串       3
{
while(*str)
{
sendbyte(*str++);
}
}
void sendstring4(u8 *str)//發送字符串       4
{
while(*str)
{
sendbyte(*str++);
}
}
void main(void) //主函數
{
      begin();
      P2=0x00;
      P3=0xff;
      delay(1000000);
sendstring4("welcome to west world!!!!!________________________________________\n");
while(1)  ;
//       sendstring4("welcome to west world!!!!!\n");;
}
void rtinter(void) interrupt 4             //接受中斷
{
u8 receivedate;
receivedate=SBUF;
RI=0;
x=receivedate-'0';
P0=shumaguang[x];
sendstring("i have got it!!!buttom k3\n");
}
void outinter(void) interrupt 2          //外部中斷0
{
delay(100);
if(k4==0)
{sendstring2("i have a bottom\n");

}
}
void outinter2(void) interrupt 0             //外部中斷1
{
delay(100);
if(k3==0)
sendstring3("you send me a digit:\r");
sendbyte(x+'0');

}

作者: zhang1314hong 時間: 2018-11-25 22:48
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