Micro printer C51 control program

*This program is the control program of Xinrongda micro printer. The information to be printed is input through computer serial communication control. The printed information is saved in an array with a length of 36. The corresponding results are printed according to the data in the array. The first bit is the start bit, the second bit is the command bit, the third to fifth bits are the address bits, the sixth bit is the device type, the seventh to twenty-second bits are the location description, the twenty-third bit is the event type, the following is the time, and the last bit is the check bit. */

#i nclude 
#define UCHAR unsigned char
#define UINT unsigned int
#define TIME1 1000
#define TIME2 200
#define LEN 35

.......

extern UCHAR sd[36]={0x9a,0x01,0x30,0x30,0x31,0x01,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, 0x20,"050707000000"};

void Delay(UCHAR m)
{
while(--m);
}

void DelayInt(UINT n)
{
while(--n);
}

void Out(char sa)
{
STB=1;
while(BUSY);
Delay(5);
P0 = sa;
STB = 0;
Delay(4);
STB = 1;

}

void Outs(char ss[])
{
char i=0;
while(ss[i]!=0x00)
{
  Out(ss[i]);
i++;
}
}

void Outn(char ss[],UCHAR x,UCHAR y)
{
char i;
for(i=x-1;i {
  Out(ss[i]);
}
}

void OutSerial(char sb)
{
ES = 0;
SBUF = sb;
while(!TI);
TI = 0;
ES = 1;
}

void main()
{
UCHAR j;
for(j=1;j<=TIME2;j++)
{
  DelayInt(TIME1);
}

SCON = 0x50;
T2CON = 0x34;
RCAP2H = 0xff;
RCAP2L = 0xb2;
PS = 1;
IE = 0xb1; //Set SFR and baud rate

while(1)
{
  if(SEL == 1)
  {
  YLW = 1;
  if(PE == 0)
  {  
  RED = 1;
   Out(0x1b);
   Out(0x40);
    Out(0x1b);
   Out(0x4E);
   Out(0x03); //Binding length 3 lines
   Out(0x1b);
   Out(0x38);
   Out(0x00); //16*16 dot matrix Chinese characters
   Out(0x1b);
   Out(0x56);
   Out(0x02);
    Outn(sd,3,5);
    Outs("# ");
   Out(0x1b);
   Out(0x57);
   Out(0x01);
    if(sd[5] == 0x01)
    {
     Outs("Dual band");
    }
    else if(sd[5] == 0x02)
    {
     Outs("Light cross section");
    }
    else
    {
     Outs("Others");
    }
    Outs("Detector");
   Out(0x0a);
   Out(0x0d); 
    Outn(sd,7,22);
   Out(0x0a);
   Out(0x0d); 
    if(sd[22] == 0x01)
    {
     Outs("Fire alarm");
    }
    else if(sd[22] == 0x02)
    {
     Outs ("Fault");
    }
    else
    {
     Outs("Pending");    }
    Out    (0x0a    );    Out(0x0d);     Out     (    0x1b);     Out (0x56);     Out(0x02); Out(sd[23]);     Out     (sd[24]); Outs (     "     -") ;     Out(     sd[25     ]); ;     Outs(":");     Out(sd[31]);     Out(sd[32]);     Outs(":");     Out(sd[33]);     Out(sd[34]);


   

   Out(0x1b);
   Out(0x57);
   Out(0x01);
   Out(0x0a);
   Out(0x0d);
    Outs("********************") ;
   Out(0x0a);
   Out(0x0d); }
  else
  {
  RED = 0;
  }
  }
  else
  {
  YLW = 0;
  }
} 
}

void SerialInt() interrupt 4 //using 1
{
char sum,sa;
char i;
ES = 0;
  if(RI)
  {
    RI = 0;
    for(i=0;i {
    sd[i] = sd[i+1 ];
    }
    sd[LEN] = SBUF;
    sa = 0x9a;
    if(sd[0] == sa)
    {
       sum = 0;
       for(i=1;i {
         sum=sum+sd[i];
       }
       if(sum == sd[LEN])
       {
                OutSerial(0xa0);    
       }        
    } 
  }
  if(TI)
  {
    TI = 0;
  }
ES = 1;
}