Hello sir..need help to finish my program about Timers using MicroC..in PIC16F877A..

[UyAb]

I'm making a timer in which I can input time using keypad and the numbers I pressed should appear in the the LCD..
And when I press ( * ),the countdown will start..Also the countdown timer should appear in the LCD..
Please help me with this..here's my code..

unsigned short kp;
unsigned short cnt;
int hour_ones,min_ones,min_tens;
char code[3],code1[1],digit[3];
int i=0;
unsigned int delay=60000;
void enter_hours()
{
     kp=0; //reset key code variable
       do
       kp= Keypad_Released();  //store key code in variable
       while (!kp);     //prepare value for output,transform key to it's ASCII value
       switch(kp)
       {
        case 1: kp=49;break; //1
        case 2: kp=50;break; //2
        case 3: kp=51;break; //3
        case 5: kp=52;break; //4
        case 6: kp=53;break; //5
        case 7: kp=54;break; //6
        case 9: kp=55;break; //7
        case 10: kp=56;break;//8
        case 11: kp=57;break;//9
        case 14: kp=48;break;//0
       }
     code[i]=kp;
     Lcd_Chr(2,i+1,code[i]);
     Lcd_Chr_Cp(':');
     i++;
}
void enter_minutesT()
{
     kp=0; //reset key code variable
       do
       kp= Keypad_Released();  //store key code in variable
       while (!kp);     //prepare value for output,transform key to it's ASCII value
       switch(kp)
       {
        case 1: kp=49;break; //1
        case 2: kp=50;break; //2
        case 3: kp=51;break; //3
        case 5: kp=52;break; //4
        case 6: kp=53;break; //5
        case 14: kp=48;break;//0

       }
     code[i]=kp;
     Lcd_Chr(2,3,code[i]);
     i++;
}
void enter_minutesO()
{
     kp=0; //reset key code variable
       do
       kp= Keypad_Released();  //store key code in variable
       while (!kp);     //prepare value for output,transform key to it's ASCII value
       switch(kp)
       {
        case 1: kp=49;break; //1
        case 2: kp=50;break; //2
        case 3: kp=51;break; //3
        case 5: kp=52;break; //4
        case 6: kp=53;break; //5
        case 7: kp=54;break; //6
        case 9: kp=55;break; //7
        case 10: kp=56;break;//8
        case 11: kp=57;break;//9
        case 14: kp=48;break;//0
       }
     code[i]=kp;
     Lcd_Chr(2,4,code[i]);
     i++;
}
void select()
{
     kp=0; //reset key code variable
       do
       kp= Keypad_Released();  //store key code in variable
       while (!kp);     //prepare value for output,transform key to it's ASCII value
       switch(kp)
       {
        case 13: kp=42;break;//*
        case 15: kp=35;break;//#
       }
     code1[i]=kp;
}
void input_time()
{
 Lcd_Cmd(Lcd_Clear);
   Lcd_Out(1,1,"Enter Time");
   enter_hours();
   delay_ms(500);
   enter_minutesT();
   enter_minutesO();
   delay_ms(1000);
}
void code_read()
{
 delay_ms(20);
 digit[0]=EEPROM_Read(0x00);
 delay_ms(20);
 digit[1]=EEPROM_Read(0x01);
 delay_ms(20);
 digit[2]=EEPROM_Read(0x02);
 delay_ms(20);
 digit[3]=EEPROM_Read(0x03);
 delay_ms(20);
}
void code_write()
{
 delay_ms(20);
 EEPROM_Write(0x00,code[0]);
 delay_ms(20);
 EEPROM_Write(0x01,code[1]);
 delay_ms(20);
 EEPROM_Write(0x02,code[2]);
 delay_ms(20);
 EEPROM_Write(0x03,code[3]);
 delay_ms(20);
}
void display_digits()
{
 code[2]=min_ones;
 code[1]=min_tens;
 code[0]=hour_ones;
 Lcd_Cmd(Lcd_Clear);
 Lcd_Out(1,1,"Time Left:");
 IntToStr(code,digit);
 Lcd_Out(2,8,digit);
 Lcd_Out(2,14,"H:M");
}
void countdown_timer()
{
 Lcd_Cmd(Lcd_Clear);
 Lcd_Out(1,1,"Time Left:");
 Lcd_Out(2,8,code);
 Lcd_Out(2,14,"H:M");
 min_ones--;
 cnt--;
 Vdelay_ms(delay);
 display_digits();
  if(min_ones==-1)
   {
    min_ones=9;
    min_tens--;
    cnt=0;
     if(min_tens==-1)
     {
      min_tens=9;
      hour_ones--;
       if(hour_ones==0&&min_tens==0&&min_ones==0)
       {
        PortC.f7=1;
       }
     }
   }
}
void main()
{
 Keypad_Init(&PORTD);
 Lcd_Init(&PORTB);
 Lcd_Cmd(Lcd_Clear);
 Lcd_Cmd(Lcd_Cursor_Off);
 Lcd_Out(1,2,"WELCOME USER");
 delay_ms(3000);

 Start:
 Lcd_Cmd(Lcd_clear);
 input_time();
 Lcd_Cmd(Lcd_clear);
 Lcd_Out(1,1,"Press * or #");
 Lcd_Out(2,1,"*:Start #:Cancel");
 {
  do
  {
   i=0;
   select();
   if(code1[0]==42)goto Start1
   if(code1[0]==35)
   {
    input_time();
   }
  }while(1);
 }

 Start1:
 Lcd_Cmd(Lcd_Clear);
 delay_ms(500);
 Lcd_Out(1,4,"CLASSROOM");
 Lcd_Out(2,2,"POWER CONTROL");
 countdown_timer();
}

 

[jayanth.devarayanadurga]

Why there are three keypad routines? You can use one routine for hours, minutes, etc...

 

[UyAb]

the first one is for the first digit for the hours,the second is for the tens-digit minutes(as you can see there are just 0-5),and the third is for the ones-digit minutes..

- - - Updated - - -

the first one is for the first digit for the hours,the second is for the tens-digit minutes(as you can see there are just 0-5),and the third is for the ones-digit minutes..

 

[jayanth.devarayanadurga]

You can use one keypad routine to set the time.

 

[UyAb]

Yes sir, I already did that..my problem now is how to automatically display the time every time it changes..every minute actually..
I think I need sample codes or something I can compare my program with..a guide,or something..

- - - Updated - - -

sorry sir,I miss read your reply..yes,I also did that..I used 3 keypad routines to control the input for every digits..
I don't know how to do it in just ones routine,that's why I used 3..
But if you know how to do so,can you please show me the codes for that?
Please bare with me sir for I am just a newbie in programming..

 

[jayanth.devarayanadurga]

Check for RTC DS1307 and similar RTC codes.

 

[UyAb]

Ok sir,I'll go to it..
would you mind if I ask you again if I have questions about RTC?

 

[pasicr]

Maybe this will be help...
https://embedded-lab.com/blog/?p=4069
regards

 

[UyAb]

thank you sir..