[PIC] Unexpected behavior with Pic16f1847

[adarsh33]

Hi to all, I am into a project of "programmable timer" using real time clock with ds1307, for that I am working with Pic16f1847 and using Mikroc pro compiler for programming. I am using 16Mhz internal oscillator for clocking the device. I am using PICKIT3 programmer for building the code. My code is working fine with PIC18f4520 as per my application . When I build the code into Pic16f1847 I am able to set the clock timing but when I am setting the time to switch on the relay, its not switching. Some unexpected problems I came across are as follows:- (i) Whenever I put any if condition of the code in beginning of the infinite loop I am not getting the display on Lcd. (ii) Whenever I add any extra text to display on the Lcd I am not getting anything on the Lcd, (iii) I was getting Rom memory full errors that's why I have written the routines for Lcd messages and delays and now my Rom is 50% free with 42% free Ram space. My clock is working fine and I am able to set the clock and calendar . And this full code works fine in 18f4520 with change in register configuration as per 18f4520. I am posting my code. Help me to find any solution of it.

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// Lcd module connections
sbit LCD_RS at RB0_bit;
sbit LCD_EN at RB3_bit;
sbit LCD_D4 at RB5_bit;
sbit LCD_D5 at RB6_bit;
sbit LCD_D6 at RB7_bit;
sbit LCD_D7 at RB2_bit;
 
sbit LCD_RS_Direction at TRISB0_bit;
sbit LCD_EN_Direction at TRISB3_bit;
sbit LCD_D4_Direction at TRISB5_bit;
sbit LCD_D5_Direction at TRISB6_bit;
sbit LCD_D6_Direction at TRISB7_bit;
sbit LCD_D7_Direction at TRISB2_bit;
//End LCD connection
 
sbit set at RA4_bit;
sbit upcount at RA3_bit;   // switch to increment the counter
sbit downcount at RA2_bit;    // switch to decrement the counter
sbit set_clock at RA1_bit;      // switch for setting menu
sbit Relay1 at RA7_bit;     // Relay connection
 
 
unsigned char BCD2LowerCh(unsigned char bcd);            // Binary to Decimal conversion for RTC
unsigned char BCD2UpperCh(unsigned char bcd);             // Binary to Decimal conversion for RTC
unsigned short read_ds1307(unsigned short address );       // Function for RTC read
void write_ds1307(unsigned short address,unsigned short w_data);        // Function for RTC write
 
void switching();
 
bit switch_flag;
char ampm,switch_count_on,switch_count_off;
unsigned char countr, second,days,hours,minutes,years,dates,months,date, month, hour, minute,sec,day,year,count7,count8,count9,count10,minute2,
dy, hrs2, dat2,day2,sec1, mon2, yer2,mint3,hrs3,dat3,mon3,yer3,rr,hrs2pm,hour11,count11,count1,count2,count3,count4,count5,count6,
day11,day12, day13, day14, day15, day16,day17,dt,mt,yr,mint,hrs, minute1,hour1,day1,date1,month1,year1,minute3,hour3, minute4, hour4;      // Variables declaration for clock and date
 
 
 
 char minuteclk(unsigned char mint2);       //Function for minutes
 char hoursclk(unsigned char hrs2pm);       //Function for hours
 char dayclk(unsigned char day2);           //Function for day
 char dateclk(unsigned char dar2);          //Function for date
 char monthclk(unsigned char mon2);         //Function for month
 char yearclk(unsigned char yr2);          //Function for year
 
 
char days1[] = "SUN";
char days2[] = "MON";
char days3[] = "TUE";
char days4[] = "WED";
char days5[] = "THU";
char days6[] = "FRI";
char days7[] = "SAT";
 
char clock[9];
char calender[9];
char *text ="0";
char *text0 ="00";
char *text1 ="00";
char *text2 ="00";
char *text3 ="00";
char *text4 ="00";
char *text5 ="00";
 
 
 
void Delay2ms(void);
void Delay200ms(void);
void Delay500ms(void);
void Delay1s(void);
void Delay4s(void);
void lcd_clr(void);
void msg_welcome(void);
void msg_setmenu(void);
void msg_s_option(void);
void msg_setclock(void);
void msg_clock(void);
void msg_calendar(void);
void msg_clock_notify(void);
void msg_switch_min_hr(void);
void msg_switch_on_notify(void);
void msg_switch_off_notify(void);
void msg_on_time(void);
void msg_off_time(void);
 
void main()
{
  PORTA =  0b00000000;
  LATA = 0;
  ANSELA = 0;
  TRISA =  0b01011111;
  PORTB =  0;
  LATB = 0;
  ANSELB = 0b00000000;        // PORTB pins are all digital
  OSCCON = 0b11110010;         // 16MHZ INTOSC
  OSCTUNE = 0b00011111;
 
  ADRESH = 0;
  ADRESL = 0;
  ADCON0 = 0;
 
  ADCON1 = 0b00001111;
 
  C1ON_bit  = 0;
 
  TRISA.F4= 1;     /// FOR Button
  TRISA.F3= 1;
  TRISA.F2= 1;
  TRISA.F1= 1;
  TRISA.F7= 0;     // RELAY1
 
  switch_flag = 0;
  switch_count_on = 0;
  switch_count_off = 0;
  I2C1_Init(100000);
  Lcd_Init();
  lcd_clr();
  msg_welcome();
  Delay1s();
 
  lcd_clr();
 
 
 
 
  do
  {
 
begin:
 
 
second = read_ds1307(0X00);        // read second
minute = read_ds1307(0X01);     // read minute
hour = read_ds1307(0X02);       // read hour
 
if (hour<0x12)
{
if (hour==0)
{
hour = 0x12;
ampm = 'A';
  }
else
ampm = 'A';
    }
 
else if (hour == 0x12){
ampm = 'P';
}
 
else if (hour>0x12 && hour<0x20)
{
hour = hour-0x12;
ampm= 'P';
}
 
else if (hour==0x20){
hour = 0x08;
ampm = 'P';
}
 
else if (hour==0x21){
hour = 0x09;
ampm = 'P';
}
 
else if (hour==0x22){
ampm = 'P';
hour = 0x10;
}
 
else if (hour==0x23){
ampm = 'P';
hour = 0x11;
}
 
day=read_ds1307(0X03);        // read day
date=read_ds1307(0X04);       // read date
month=read_ds1307(0X05);      // read month
year=read_ds1307(0X06);       // read year
 
write_ds1307(0x19,second);      // write second
write_ds1307(0x1A,minute);      // write minute
write_ds1307(0x1B,hour);        // write hour
write_ds1307(0x1C,day);         // write day
write_ds1307(0x1D,date);        // write date
write_ds1307(0x1E,month);       // write month
write_ds1307(0x1F,year);        // write year
 
clock[0] = BCD2UpperCh(hour);
clock[1] = BCD2LowerCh(hour);
clock[2] = ':';
clock[3] = BCD2UpperCh(minute);
clock[4] = BCD2LowerCh(minute);
 
clock[5] =' ';
clock[6] =ampm;
clock[7] ='M';
clock[8] ='\0';
 
Lcd_Out(2,1,calender);
Lcd_Out(1,1,clock);
 
calender[0] = BCD2UpperCh(date);
calender[1] = BCD2LowerCh(date);
calender[2] ='/';
calender[3] = BCD2UpperCh(month);
calender[4] = BCD2LowerCh(month);
calender[5] ='/';
 
calender[6] = BCD2UpperCh(year);
calender[7] = BCD2LowerCh(year);
calender[8] = '\0';
 
if(day ==1)
{
 Delay2ms();
Lcd_Out(2,10,days1);
}
if(day ==2)
{
 Delay2ms();
Lcd_Out(2,10,days2);
}
if(day ==3)
{
 Delay2ms();
Lcd_Out(2,10,days3);
}
if(day ==4)
{
Delay2ms();
Lcd_Out(2,10,days4);
}
if(day ==5)
{
Delay2ms();
Lcd_Out(2,10,days5);
}
if(day ==6)
{
Delay2ms();
Lcd_Out(2,10,days6);
}
if(day ==7)
{
Delay2ms();
Lcd_Out(2,10,days7);
}
 
 
if(set == 0)                    // Set switch must be pressed one time
    {
start:
 
       Delay200ms();
       lcd_clr();
    msg_setmenu();
 
 
       Delay1s();
    lcd_clr();
       msg_s_option();
 
       Delay500ms();
 
for(count1=0; count1<4;count1)
{
             Delay500ms();
             if(upcount == 0 )    // Press upcount switch to select  desired option
             {
              count1+=1;
              }
              if(downcount == 0 )      // For decrement
             {
              count1-=1;
              }
              if(count1 == 4)
              {
              count1 = 0;
              }
 
              text[0] = count1 % 10 +48 ;
              Lcd_out(1, 15, text);
 
              if(count1==1 && set == 0)
              {
                  lcd_clr();
                  msg_setclock();
                  Delay1s();
                  goto  Clock_setting ;
              }
            if( count1==2 && set == 0)
              {
                  lcd_clr();
                  msg_on_time();
                  Delay1s();
                  goto On_Status;
              }
       if( count1==3 && set == 0)
              {
                 lcd_clr();
                  msg_off_time();
                  Delay1s();
                  goto Off_Status;
              }
              if(set_clock == 0)
              {
                  Delay2ms();
                 lcd_clr();
                  goto begin;
              }
 
                             }
 
 
 
Clock_setting :
 
 
 TimeSet_clock:
 
              lcd_clr();
              msg_clock();
 
 
              Delay1s();
              lcd_clr();
              msg_calendar();
 
 
for(count2 = 0; count2 <7; count2)
{
            Delay500ms();
             if(upcount == 0 )
             {
              count2+=1;
              }
             if(downcount == 0 )
             {
              count2-=1;
              }
                if(count2 == 7)
              {
              count2 = 0;
              }
              text[0] = count2 % 10 +48 ;
              Lcd_out(2, 15, text);
 
              if(count2==1 && set == 0)
              {
              minute2 = 1;
              minute1=minuteclk(minute2) ;
              write_ds1307(0x20,Dec2Bcd(minute1));
              goto TimeSet_clock;
              }
 
              if( count2==2 && set == 0)
              {
              hrs2 = 1;
              hour1 = hoursclk(hrs2pm);
              write_ds1307(0x21,Dec2Bcd(hour1));
              goto TimeSet_clock;
              }
 
            if( count2==3 && set ==0)
              {
              dat2 = 1;
              date1=dateclk(dat2);
              write_ds1307(0x22,Dec2Bcd(date1));
              goto TimeSet_clock;
             }
 
             if( count2==4 && set == 0)
              {
              day2 =1;
              day1= dayclk(day2);
              write_ds1307(0x23,Dec2Bcd(day1));
              goto TimeSet_clock;
              }
 
              if( count2==5 && set == 0)
              {
              mon2 = 1;
              month1= monthclk(mon2);
              write_ds1307(0x24,Dec2Bcd(month1));
              goto TimeSet_clock;
              }
 
              if( count2==6 && set == 0)
              {
              yer2 = 1;
              year1= yearclk(yer2);
              write_ds1307(0x25,Dec2Bcd(year1));
              goto TimeSet_clock;
              }
 
            if (count2== 0 && set==0)
             {
 
             if(set == 0)
             {
              sec1= 00;
              mint=read_ds1307(0x20);
              hrs=read_ds1307(0x21);
              dt=read_ds1307(0x22);
              dy=read_ds1307(0x23);
              mt=read_ds1307(0x24);
              yr=read_ds1307(0x25);
              }
               else
                {
                sec1= read_ds1307(0x19);
                mint=read_ds1307(0x1A);
                hrs=read_ds1307(0x1B);
                dy=read_ds1307(0x1C);
                dt=read_ds1307(0x1D);
                mt=read_ds1307(0x1E);
                yr=read_ds1307(0x1F);
 
                }
                write_ds1307(0X00,sec1);
                write_ds1307(0X01,mint);
                write_ds1307(0X02,hrs);
                write_ds1307(0X03,dy);
                write_ds1307(0X04,dt);
                write_ds1307(0X05,mt);
                write_ds1307(0X06,yr);
                write_ds1307(0X07,0x10);
 
                lcd_clr();
               msg_clock_notify();
 
                Delay1s();
                goto TimeSet_clock;
             }
 
              if(set_clock ==0)
              {
              lcd_clr();
              goto start;
 
               }
 
 
                     }
 
 
                     ///////////////-----------------/////////////////////////
                      On_Status:
 
 
 
 
         for(count3 = 0; count3 <4; count3)
            {
              Delay500ms();
             if(upcount == 0 )
             {
              count3+=1;
              }
              if(downcount == 0 )
             {
              count3-=1;
              }
 
              if(count3 == 4)
              {
              count3 = 0;
              }
              lcd_clr();
 
              msg_s_option();
              msg_switch_min_hr();
 
              text[0] = count3 % 10 +48 ;
              Lcd_out(1, 15, text);
 
              if(count3==1 && set == 0)
              {
                  minute2 = 1;
                  minute1=minuteclk(minute2) ;
                  write_ds1307(0x2D,Dec2Bcd(minute1));
                  goto On_Status;
               }
 
              if( count3==2 && set == 0)
              {
                  hrs2 = 1;
                  hour1 = hoursclk(hrs2pm);
                  write_ds1307(0x2E,Dec2Bcd(hour1));
 
                  goto On_Status;
 
               }
 
              if(count3==3 && set == 0)
              {
             lcd_clr();
             msg_switch_on_notify();
                  write_ds1307(0x2D,00);
                  write_ds1307(0x2E,00);
 
                  Delay1s();
                  goto On_Status;
               }
 
 
              if(set_clock == 0)
               {
                 lcd_clr();         // Cursor off
                  goto start;
                }
           }
 
                    Off_Status:
 
 
 
 
for(count4 = 0; count4 <4; count4)
{
              Delay500ms();
             if(upcount == 0 )
             {
              count4+=1;
              }
              if(downcount == 0 )
             {
              count4-=1;
              }
              if(count4 == 4)
              {
              count4 = 0;
              }
             lcd_clr();
              msg_s_option();
               msg_switch_min_hr();
 
              text[0] = count4 % 10 +48 ;
              Lcd_out(1, 15, text);
 
              if(count4==1 && set == 0)
              {
                  minute2 = 1;
                  minute1=minuteclk(minute2) ;
                  write_ds1307(0x2F,Dec2Bcd(minute1));
                  goto Off_Status;
              }
             if( count4==2 && set == 0)
              {
                 hrs2 = 1;
                 hour1 = hoursclk(hrs2);
                 write_ds1307(0x30,Dec2Bcd(hour1));
                 goto Off_Status;
              }
 
 
              if(count4== 3 && set == 0)
              {
                 lcd_clr();
                msg_switch_off_notify();
                 write_ds1307(0x2F,00);
                 write_ds1307(0x30,00);
                  Delay1s();
                 goto Off_Status;
               }
 
 
               if(set_clock == 0)
              {
                 lcd_clr();
                 goto start;
                }
           }
 
minute3=read_ds1307(0x2D);
hour3=read_ds1307(0x2E);
  minute4=read_ds1307(0x2F);
hour4=read_ds1307(0x30);
 
 
  if((minute==0x25) && (hour==0x11))//||(minute==minute4 && hour==hour4))
    {
      Delay200ms();
      lcd_clr();
      Lcd_out(1, 1, "1st SWITCH ON");
       Lcd_out(2, 1, " AT SET");
              //switch_status1on = 1;
       // switch_status1off = 0;
       switching();
        if(switch_count_on<=0)
        {switch_flag= 1;
        }
       else {switch_flag = 0;
       //Delay_ms(3000);
      lcd_clr();
             }
                      }else
                      {
                       switch_count_on = 0;
                        }
 
 
 if((minute==minute4 && hour==hour4))
  {
       lcd_clr();
 
       switching();
       Lcd_out(1, 1, "1st SWITCH OFF");
        Lcd_out(2, 1, " AT SET");
 
      if(switch_count_off<=0)
        {switch_flag= 1;
        }
       else {switch_flag = 0;
 
       delay_ms(5000);
       lcd_clr();
             }
 
   }
  else {switch_count_off = 0;}
                         }
 
 
 
 
  }while(1);
     }
 
     void switching()
      {
      if(switch_flag)
      {
        switch_count_on++;
        switch_count_off++;
      Delay200ms();
      Relay1 = ~ Relay1;
      eeprom_write(0x10,Relay1);
      switch_flag = 0;
      }
      }
 
 
 
  unsigned short read_ds1307(unsigned short address )
{
int dat;
I2C1_Start();
I2C1_Wr(0xd0);
I2C1_Wr(address);
I2C1_Start();
I2C1_Wr(0xd1);
dat=I2C1_Rd(0);
I2C1_Stop();
return(dat);
}
 
unsigned char BCD2UpperCh(unsigned char bcd)
{
return ((bcd >> 4) + '0');
}
 
unsigned char BCD2LowerCh(unsigned char bcd)
{
return ((bcd & 0x0F) + '0');
}
 
void write_ds1307(unsigned short address,unsigned short w_data)
{
I2C1_Start(); // issue I2C start signal
//address 0x68 followed by direction bit (0 for write, 1 for read) 0x68 followed by 0 --> 0xD0
I2C1_Wr(0xD0); // send byte via I2C (device address + W)
I2C1_Wr(address); // send byte (address of DS1307 location)
I2C1_Wr(w_data); // send data (data to be written)
I2C1_Stop(); // issue I2C stop signal
}
 
 
  char minuteclk(unsigned char mint2)
         {
                  Lcd_Cmd(_LCD_CLEAR);               //Lcd clear
                  Lcd_Cmd(_LCD_CURSOR_OFF);
                  Lcd_out(1,3, "Select Minute");
                  for(count5 = 0; count5 < 60; count5)
                  {
                    if(upcount == 0 )
                    {
                    count5+=1;
                    }
                    else if(downcount == 0 )
                    {
                    count5-=1;
                    }
                    text0[0] = count5/10 + 48;
                    text0[1] = count5 % 10 +48 ;
                    Lcd_out(2, 1,"Minute:");
                    Lcd_out(2, 8, text0);
                    Delay_ms(300);
                    if( set == 0)
                    {
                    goto return1;
                    }
                     }
               return1:
               return count5;
          }
 
char hoursclk(unsigned char hrs2pm)
           {
                Lcd_Cmd(_LCD_CLEAR);                     //Lcd clear
                Lcd_Cmd(_LCD_CURSOR_OFF);
                Lcd_out(1,3, "Select Hours");
                for(count6 = 0; count6 < 24; count6)
                  {
                   if(upcount == 0 )
                    {
                    count6+=1;
                    }
                   if(downcount == 0 )
                    {
                    count6-=1;
                    }
 
                    text0[0] = count6/10 + 48;
                    text0[1] = count6 % 10 +48 ;
                    Lcd_out(2, 1,"Hour:");
                    Lcd_out(2, 6, text0);
                    Delay_ms(400);
                    if( set == 0)
                    {
                    goto return2;
                    }
                    }
                  return2:
                  return count6;
 
           }
 
char dayclk(unsigned char day2)
{
 
                Lcd_Cmd(_LCD_CLEAR);                   //Lcd clear
                Lcd_Cmd(_LCD_CURSOR_OFF);
                Lcd_out(1,1, "Select Day:");
                Lcd_out(2, 1, "1:Sun 2:Mon 3:");
                Lcd_out(3, -3, "Tue 4:Wed 5:Thu");
                Lcd_out(4, -3, "6:Fri 7:Sat ");
                for(count7 = 0; count7 < 8; count7)
                  {
                   if(upcount == 0 )
                    {
                    count7+=1;
                    }
                   if(downcount == 0 )
                    {
                    count7-=1;
                    }
                      if(count7 ==1)
                      Lcd_Out(1,13,days1);
                      if(count7 ==2)
                      Lcd_Out(1,13,days2);
                      if(count7 ==3)
                      Lcd_Out(1,13,days3);
                      if(count7 ==4)
                      Lcd_Out(1,13,days4);
                      if(count7 ==5)
                      Lcd_Out(1,13,days5);
                      if(count7 ==6)
                      Lcd_Out(1,13,days6);
                      if(count7 ==7)
                      Lcd_Out(1,13,days7);
                      Delay_ms(500);
                      if( set == 0)
                    {
                    goto return2;
                    }
                    }
                  return2:
                  return count7;
 
                 }
 
 
char dateclk(unsigned char dar2)
         {
                Lcd_Cmd(_LCD_CLEAR);                        //Lcd clear
                Lcd_Cmd(_LCD_CURSOR_OFF);
                Lcd_out(1,3, "Select Date");
                for(count8 = 0; count8 <= 31; count8)
                  {
                   if(upcount == 0 )
                    {
                    count8+=1;
                    }
                   if(downcount == 0 )
                    {
                    count8-=1;
                    }
                    text0[0] = count8/10 + 48;
                    text0[1] = count8 % 10 +48 ;
                    Lcd_out(2, 1,"Date:");
                    Lcd_out(2, 6, text0);
                    Delay_ms(400);
                    if( set == 0)
                    {
                    goto return3;
                    }
                    }
                    return3:
                    return count8;
                 }
 
char monthclk(unsigned char mon2)
         {
                Lcd_Cmd(_LCD_CLEAR);                      //Lcd clear
                Lcd_Cmd(_LCD_CURSOR_OFF);
                Lcd_out(1,3, "Select Month");
                for(count9 = 0; count9 < 13; count9)
                  {
                   if(upcount == 0 )
                    {
                    count9+=1;
                    }
                   if(downcount == 0 )
                    {
                    count9-=1;
                    }
                    text0[0] = count9/10 + 48;
                    text0[1] = count9 % 10 +48 ;
                    Lcd_out(2, 1,"Month:");
                    Lcd_out(2, 7, text0);
                    Delay_ms(500);
                    if( set == 0)
                    {
                    goto return4;
                    }
                    }
                     return4:
                     return count9;
                 }
 
char yearclk(unsigned char yr2)
{
                Lcd_Cmd(_LCD_CLEAR);                 //Lcd clear
                Lcd_Cmd(_LCD_CURSOR_OFF);
                Lcd_out(1,3, "Select Year");
                for(count10 = 0; count10 <= 99; count10)
                  {
                   if(upcount == 0 )
                    {
                    count10+=1;
                    }
                   if(downcount == 0 )
                    {
                    count10-=1;
                    }
                    text0[0] = count10/10 + 48;
                    text0[1] = count10 % 10 +48 ;
                    Lcd_out(2, 1,"Year:");
                    Lcd_out(2, 7, text0);
                    Delay_ms(500);
                    if( set == 0)
                    {
                    goto return5;
                    }
                    }
                  return5:
                  return count10;
                 }
 
                 void Delay2ms(void)
                 {
                 delay_ms(2);
                 }
void Delay200ms(void)
{
                 delay_ms(200);
                 }
void Delay500ms(void)
{
                 delay_ms(500);
                 }
void Delay1s(void)
{
                 delay_ms(1000);
                 }
 
 
void Delay4s(void)
                  {
                 delay_ms(4000);
                 }
                 void lcd_clr(void)
{
 Lcd_Cmd(_LCD_CLEAR);                 //Lcd clear
  Lcd_Cmd(_LCD_CURSOR_OFF);
}
 
void msg_welcome(void)
{Lcd_Out(1,1,"WELCOME ");
 
}
void msg_setmenu(void)
{
  Lcd_out(1, 3, "SETTING MENU");
  Lcd_out(2, 1, "Clock & Calender");
}
void msg_s_option(void)
{
  Lcd_out(1,1, "SELECT OPTION:");
}
void msg_setclock(void)
{
  Lcd_out(1,1, "Set Clock & Date");
}
void msg_clock(void)
{
 Lcd_out(1, 1, "1:Minute 2:Hour");
 Lcd_out(2, 1, "3:Date 4:Weekday");
}
void msg_calendar(void)
{
Lcd_out(1, 1, "5:Month 6:Year");
Lcd_out(2, 1, "Select Option:");
}
void msg_clock_notify(void)
{
  Lcd_out(1, 1,"Clock is set");
}
void msg_switch_min_hr(void)
{
  Lcd_out(2,1,"1:S1-Min 2:S1-Hr");
}
void msg_switch_on_notify(void)
{
 Lcd_out(1,2,"Switch On time");
 Lcd_out(2,3,"Disabled");
}
void msg_switch_off_notify(void)
{
 Lcd_out(1,1,"Switch off time");
 Lcd_out(2,1,"Disabled");
}
void msg_on_time(void)
{
Lcd_out(1,2, "Select Switch");
Lcd_out(2,2, "On Time");
}
void msg_off_time(void)
{
 Lcd_out(1,2, "Select Switch");
Lcd_out(2,2, "Off Time");
}

---

 

[Aussie Susan]

I have spent over half an hour trying to sort out the nesting of your code. I hope that is not the original way it was and that this forum has mangled the indenting.
Also, in my opinion, that code is a mess and reflects some fairly unstructured and 'fuzzy' thinking. Have you ever heard of a 'switch' statement? It would help clean up a lot of your code.
Also you could refactor much of that code. For example, at one point you have a series of "if( day == " something statements which calls out for a switch statement. However each of the subsequent statement blocks begins with a call to the same delay function. As far as I can tell, the 'day' variable must match one of the 'if' statements and therefore you could pull the 'delay' function call out and put it before the switch or initial 'if' statement.
You have 7 character arrays labelled 'day1' to 'day7'. If you declared a variable such as

char dayNames[7][] = 
{ "SUN", "MON", "TUE", "WED", "THU", "FRI", "SAT" };

then all of that section of code could be reduced to

Delay2ms();
Lcd_Out( 2, 10, dayNames[day]);

which would save you a lot in terms of program memory as well as be much easier to code and debug.
The use of so many labels and "goto" instructions means to me that you have not really thought through the structure of your code before you started to write it.
I mention all of this because I suspect that there is a problem with the way the main loop is structured that is causing your problems. Because your code is jumping all over the place (because of the goto's) there is every possibility that the logic is not begin followed when you add in an extra conditional statement or other statements.
I also suspect that you would be able to come up with much cleaner code if you did not try to do everything in BCD. For example, you have a lot of code to convert to 'hours' value (which comes form the chip in 24-hour format) into 12-hour format plus the AM/PM indicator. In binary, this really reduces to 3 cases rather than the 7 you have. Also that chip is capable of working in 12-hour format so you can simply use that and read the values (including the AM/PM flag) directly.
Also, I generally don't respond to "urgent" threads - it was not me that left getting started too late, but I must admit trying to fight my way though your code was a bit of a challenge that I could not resist.
Susan

 

[BradtheRad]

Code tags are now corrected to the more readable option which is supported by the Edaboard interface -- Moderator.