命令字加数据位程序备份.c

串口程序

#include <reg52.h>
#include <absacc.h>

#define P3_2 P3^2
#define port XBYTE[0x3000];

unsigned char receive_sbuf;
unsigned char receive_7128;
unsigned char jingdu=0xff;
unsigned char weidu=0xff;
unsigned char nian=0xff;
unsigned char yue=0xff;
unsigned char ri=0xff;
unsigned char shi=0xff;
unsigned char fen=0xff;
unsigned char miao=0xff;
unsigned char OK=0xff;
unsigned char error=0;

void DS1302_init();
void main(void)
{
 P1=0XF0;     //点灯

 //外中断设置
 IT0=1;        //外部中断0 下降沿中断
 PX0=0;    //外部中断优先级低
 EX0=1;        //开外部中断0
 //串口设置
 SCON=0x50;   //模式1；允许接接收；标志位清0
 PS=1;       //串口中断高优先级
 PCON=0X80;
 TMOD=0x20;     //方式2：自动装入
 TL1=TH1=0xF3;
 TR1=1;   //波特率 4800@12Mhz)
 ES = 1;                //串口中断开

 EA=1;         //开总中断

 SBUF=0xff;
 while(1);       //死循环等待中断

}

//串口中断程序
void int_s(void) interrupt 4
{
        ES = 0;       //关闭串行中断
        if(TI==1)
         {
                //SBUF=0xff;
                TI=0;
         }
        if(RI==1)
         {
              receive_sbuf=SBUF;
              switch(receive_sbuf)
              {
               case 'E': jingdu=weidu=nian=yue=ri=shi=fen=miao=0x00; break;
               case 'J': jingdu=0x00; break;
               case 'W': weidu=0x00;  break;
               case 'N': nian=0x00;   break;
               case 'Y': yue=0x00;    break;
               case 'R': ri=0x00;     break;
               case 'S': shi=0x00;    break;
               case 'F': fen=0x00;    break;
               case 'M': miao=0x00;   break;
               case 'O': OK=0x00;    break;
               default :  {
                       if(jingdu==0x00) jingdu=receive_sbuf;
                       if(weidu==0x00) weidu=receive_sbuf;
                       if(nian==0x00) nian=receive_sbuf;
                       if(yue==0x00) yue=receive_sbuf;
                       if(ri==0x00) ri=receive_sbuf;
                       if(shi==0x00) shi=receive_sbuf;
                       if(fen==0x00) fen=receive_sbuf;
                       if(miao==0x00) miao=receive_sbuf;
                           }
              }
              SBUF=receive_sbuf;
              RI=0;
         }

        ES=1;
}

//外部中断程序
void hand(void) interrupt 0
{   //EX0=0;
    ES=0;     //关串口中断 (可能没必要)
    P2=P2+0X01;
    // port=0X44;
    // EX0=1;
    ES=1;      //开串口中断
}