波特率4800，smod置1翻倍，串口中断里的switch 语局直接跳过，也能在 pc上看到收发的数子。
单片机源程序如下:
- #include<reg51.h>
- #include<intrins.h>
- #define led P2
- typedef unsigned char u8;
- typedef unsigned int u16;
- sbit LLa=P2^2;
- sbit LLb=P2^3
- ;sbit LLc=P2^4;
- sbit beep=P1^5;
- u8 code a[]={ 0x3f , 0x06 , 0x5b , 0x4f , 0x66 , 0x6d , 0x7d , 0x07 , 0x7f , 0x6f , 0x77 , 0x7c, 0x39 , 0x5e , 0x79 , 0x71 };
- void delay (u16 i)
- { while (i--);}
- void fengmingqi ()
- { u16 i=1000;
- while (i)
- { beep=~beep; delay(100) ;i--; }}
- void shuomaguan ()
- { u8 i;
- LLa=1;
- LLb=1;
- LLc=1;
- for (i=0;i<16;i++)
- { P0=a[i]; delay(50000) ; }}
- void ledshanguang()
- { u8 i;
- led=0xfe;
- delay(50000);
- while (1) {
- for (i=0;i<7;i++)
- { led=_crol_(led,1); delay(50000); }
- for (i=0;i<7;i++)
- { led=_cror_(led,1); delay(50000); } }}
- void chuankouint()
- { TMOD=0X20; TH1=0XF3; TL1=0XF3; SCON=0X50; PCON=0X80; EA=1 ; ES=1 ; TR1=1 ; }
- void main() /***********主函数**********/
- {
- chuankouint();
- while(1) ; }
- chuankouzhongduan() interrupt 4 {
- u8 b;
- b=SBUF;
- RI=0;
- switch (B)
- { case 1:ledshanguang();break;
- case 2:shuomaguan();break;
- case 3:fengmingqi();break; }
- SBUF=b;
- while(!TI);
- TI=0;
- }
|
