CD4053 control with LCD display

Note: P1^6 and P1^7 are two function keys. P1^6 is the cascade end of the low-pass filter. When it is pressed, the other keys are pressed at the same time to connect the low-pass of each amplifier.

It is also a combination key for high-pass filter. Actually, this circuit is a key-controlled amplifier, which is mainly adjustable in 10dB steps and has LCD display. The following is the program in Keil:

#include
sbit lcdrs=P2^6;
sbit lcden=P2^7;
sbit lcdrw=P2^5;
sbit D10=P1^0;
sbit D20=P1^1;
sbit D30=P1^2;
sbit D40=P1^3;
sbit D50=P1^4;
sbit D60=P1^5;
sbit lwchose=P1^6;
sbit hgchose=P1^7;
char code temp0[]="20LogAu=10dB";
char code temp1[ ]="20LogAu=20dB";
char code temp2[]="20LogAu=30dB";
char code temp3[]="20LogAu=40dB";
char code temp4[]="20LogAu=50dB";
char code temp5[]="20LogAu=60dB";
char code templ0[]="lw_10dB";
char code templ1[]="lw_20dB";
char code templ2[]="lw_30dB ";
char code templ3[]="lw_40dB";
char code templ4[]="lw_50dB";
char code templ5[]="lw_60dB";
char code temph0[]="hg_10dB";
char code temph1[]="hg_20dB ";
char code temph2[]="hg_30dB";
char code temph3[]="hg_40dB";
char code temph4[]="hg_50dB";
char code temph5[]="hg_60dB";
char num;
void delay(int z);
void write_com(char com)// Instruction sub-function
{
   lcdrs=0;
     lcdrw=0;
    P0=com;
   delay(5);
     lcden=1 ;
   delay(5);
   lcden=0;
   lcdrw=1;
   lcdrs=1;
}
void write_data(char datae) // data sub-function
{
   lcdrs=1;
   lcdrw=0;
   P0=datae;
   delay(5);
   lcden= 1;
   delay(5);
   lcden=0;

}
void init()
{
 lcden=0;
 write_com(0x06); // Input mode setting
 write_com(0x0c);  

 write_com(0x14);    

 write_com(0x01); //Clear screen
write_com(0x02); //Reset

}
void main()
{
  init();
lab: while (1)
  {
  if (D10==0)
   {
    write_com(0x01); //Clear screen
   P3=0x22;
   for(num=0;num<12;num++)
     {
       write_data(temp0[num]);
       delay(5);
     } 
   write_com(0x80+10);
   goto lab;

   }      
   else if (D20==0)
   {
    write_com(0x01); //Clear screen
  P3=0x0a;
  for(num=0;num<12;num++)
      {
        write_data(temp1[num]);
        delay(5);
      } 
   write_com(0x80+10);
   goto lab;
   }
  
   else if (D30==0)
   {
    write_com(0x01); //Clear screen
  P3=0x02;
  for(num=0;num<12;num++)
      {
        write_data(temp2[ num]);
        delay(5);
      } 
  write_com(0x80+10);
  goto lab;
   }   
   else if (D40==0)
   {
     write_com(0x01); //Clear screen
   P3=0x04;
      for(num=0;num <12;num++)
      {
        write_data(temp3[num]);
        delay(5);
      } 
   write_com(0x80+10);
   goto lab;
   } 
   else if (D50==0)
   {
    write_com(0x01); //Clear screen
  P3=0x08;
  for(num=0;num<12;num++)
      {
        write_data(temp4[num]);
        delay(5);
      } 
  write_com(0x80 +10);
  goto lab;
   }   
   else if (D60==0)
   {
    write_com(0x01); //Clear screen
  P3=0x00;
  for(num=0;num<12;num++)
      {
        write_data(temp5[num]) ;
        delay(5);
      } 
  write_com(0x80+10);
  goto lab;
   }
TAB1: if (lwchose==0)
  {
   if (D10==0)
  {
   delay(5);
   if (D10==0)
   {
    write_com (0x01); //Clear screen
    P3=0x7a;     
    for(num=0;num<7;num++)
       {
         write_data(templ0[num]);
         delay(5);
       } 
      write_com(0x80+10);
    goto TAB1;
   }
  
  }
  else if (D20==0)
  {
   delay(5);
   if (D20==0)
   {
    write_com(0x01); //Clear screen
    P3=0x6a;     
    for( num=0;num<7;num++)
       {
         write_data(templ1[num]);
         delay(5);
       } 
      write_com(0x80+10); 
    goto TAB1; 
   }
  
  }
  else if (D30==0)
  {
   delay(5) ;
   if (D30==0)
   {
    write_com(0x01); //Clear screen
    P3=0x62;     
    for(num=0;num<7;num++)
       {
         write_data(templ2[num]);
         delay(5);
       } 
      write_com(0x80+10);
    goto TAB1; 
   }
  }
  else if (D40==0)
  {
   delay(5);
   if (D40==0)
   {
       write_com (0x01); //Clear screen
    P3=0x64;     
    for(num=0;num<7;num++)
       {
         write_data(templ3[num]);
         delay(5);
       } 
       write_com(0x80+10);
    goto TAB1;
   }
  }
  else if (D50==0)
  {
   delay(5);
   if (D50==0)
   {
    write_com(0x01); //Clear screen
    P3=0x68;     
       for(num=0;num<7;num++)
       {
         write_data (templ4[num]);
         delay(5);
       } 
      write_com(0x80+10);
    goto TAB1;
   }
  }
  else if (D60==0)
  {
   delay(5);
   if (D60==0)
   {
    write_com(0x01); //Clear screen
    P3=0x60;     
       for(num=0;num<7;num++)
       {
         write_data(templ5[num]);
         delay( 5);
       } 
      write_com(0x80+10);
    goto TAB1; 
   }
  }
  }
TAB2: if (hgchose==0)
  {
   if (D10==0)
  {
   delay(5);
   if (D10==0)
   {
    write_com( 0x01); //Clear screen
    P3=0x3a;     
    for(num=0;num<7;num++)
       {
         write_data(temph0[num]);
         delay(5);
       } 
      write_com(0x80+10);
    goto TAB2;
   }
  
  }
  else if (D20==0)
  {
   delay(5);
   if (D20==0)
   {
    write_com(0x01); //Clear screen
    P3=0x2a;     
    for(num=0;num<7;num++)
       {
         write_data(temph1[num]);
         delay(5);
       } 
      write_com(0x80+10); 
    goto TAB2; 
   }
  
  }
  else if ( D30==0)
  {
   delay(5);
   if (D30==0)
   {
    write_com(0x01); //Clear screen
    P3=0x22;     
    for(num=0;num<7;num++)
       {
         write_data(temph2[num ]);
         delay(5);
       } 
      write_com(0x80+10);
    goto TAB2; 
   }
  }
  else if (D40==0)
  {
   delay(5);
   if (D40==0)
   {
       write_com(0x01); //Clear screen
    P3=0x24;     
   for(num=0;num<7; num++)
       {
         write_data(temph3[num]);
         delay(5);
       } 
      write_com(0x80+10);
    goto TAB2;
   }
  }
  else if (D50==0)
  {
   delay(5);
   if (D50==0)
   {
    write_com(0x01); //Clear screen
    P3=0x28;     
    for(num=0;num<7;num++)
       {
         write_data(temph4[num]);
         delay(5);
       } 
      write_com(0x80+10);
    goto TAB2 ;
   }
  }
  else if (D60==0)
  {
   delay(5);
   if (D60==0)
   {
    write_com(0x01); //Clear screen
    P3=0x20;     
    for(num=0;num<7;num++)
       {
         write_data(temph5[num]);
         delay(5);
       } 
      write_com(0x80+10); 
    goto TAB2; 
   }
  } 
  }
  }

}
void delay(int z)
{
int x,y;
for(x=z;x>0;x--)
    for(y=110;y>0;y--);

}