chronograph.c

LCD Display using PIC16F887

// /usr/hitech/bin/picl  -16f84 -C -Zg chronograph.c lcd.c delay.c
// /usr/hitech/bin/picl  -16f84 -Ochronograph.hex chronograph.obj lcd.obj delay.obj


#include   <16F877A.h>
#include   "lcd.h"
#include   "delay.h"
#define FATOR 5
// 500kh / 4 = 125 khz
// 8.0 e-6 * prescalar * (256-131) * factor
//               2         125        5    = 0.01 seconds

// clock
char h = 23; //Initial Hour
char m = 59; //Initial Minute
char s = 59; //Seconds
// chronograph
char m_cr = 0; // Minute
char s_cr = 0; //Seconds
char c_cr = 0; //Cents

char centesimos = 0; //clock cents

char inicia_cr=0;
char Aux=0;
char ajuste = 0;
char i = 0;
char show = 0; // Control variable print in LCD

char n = 0 ;
char oldrb4 = 0;

// Create a LOGO by using 
void CreateAndPrintCharacter(){
  
  lcd_write(0x40); 
  lcd_putch(0x00);  // 00000
  lcd_putch(0x01);  // 00001
  lcd_putch(0x02);  // 00010
  lcd_putch(0x04);  // 00100
  lcd_putch(0x08);  // 01000
  lcd_putch(0x10);  // 10000
  lcd_putch(0x10);  // 10000
  lcd_putch(0x10);  // 10000

  lcd_write(0x48); 
  lcd_putch(0x1F);  // 11111
  lcd_putch(0x00);  // 00000
  lcd_putch(0x00);  // 00000
  lcd_putch(0x00);  // 00000
  lcd_putch(0x0E);  // 01110
  lcd_putch(0x0E);  // 01110
  lcd_putch(0x00);  // 00000
  lcd_putch(0x0E);  // 01110

  lcd_write(0x50); 
  lcd_putch(0x00);  // 00000
  lcd_putch(0x10);  // 10000
  lcd_putch(0x08);  // 01000
  lcd_putch(0x04);  // 00100
  lcd_putch(0x02);  // 00010
  lcd_putch(0x01);  // 00001
  lcd_putch(0x01);  // 00001
  lcd_putch(0x01);  // 00001

  lcd_write(0x58); 
  lcd_putch(0x10);  // 10000
  lcd_putch(0x10);  // 10000
  lcd_putch(0x10);  // 10000
  lcd_putch(0x08);  // 01000
  lcd_putch(0x04);  // 00100
  lcd_putch(0x02);  // 00010
  lcd_putch(0x01);  // 00001
  lcd_putch(0x00);  // 00000

  lcd_write(0x60);  
  lcd_putch(0x0E);  // 01110
  lcd_putch(0x0E);  // 01110
  lcd_putch(0x0E);  // 01110
  lcd_putch(0x0E);  // 01110
  lcd_putch(0x0F);  // 01111
  lcd_putch(0x0F);  // 01111
  lcd_putch(0x00);  // 00000
  lcd_putch(0x1F);  // 11111

  lcd_write(0x68);  
  lcd_putch(0x01);  // 00001
  lcd_putch(0x01);  // 00001
  lcd_putch(0x01);  // 00001
  lcd_putch(0x02);  // 00010
  lcd_putch(0x04);  // 00100
  lcd_putch(0x08);  // 01000
  lcd_putch(0x10);  // 10000
  lcd_putch(0x00);  // 00000

  // imprime a logomarca
  lcd_goto(0);
  lcd_putch(0);

  lcd_goto(1);
  lcd_putch(1);

  lcd_goto(2);
  lcd_putch(2);

  lcd_goto(64);
  lcd_putch(3);

  lcd_goto(65);
  lcd_putch(4);

  lcd_goto(66);
  lcd_putch(5);

 } 


void SendNumbertoLCD(char n)
{
    char c;
    c = (char)((n/10)+48); // Dezena
    lcd_putch(c);
    c = (char)((n%10)+48); // Unidade
    lcd_putch(c);
}


main(){
 
  TRISA = 0x00; // Output bits porta, xESRx
  TRISB = 0xF0; // Input bits portb 7654xxxx, Output Bits xxxx3210

 // ******* INTERRUP钦ES EM TMR0 *********
   T0IE = 1;  // 1 - Enable  TMR0
              // 0 - Disable TMR0

   T0IF = 0;  // Clean  TMR0 flag

   T0CS = 0;  // clock source
              //  TMR0 ( 1 -> RA4, 0 -> internal clock  )

   // prescaler
   PSA = 0;                       // ( 0 - on; 1 - off ) prescaler ->  TMR0

   
  PS2=0; // pre-scaler 1:8
  PS1=0; // clock 1MHz
  PS0=0;
TMR0=130;


  lcd_init();
  CreateAndPrintCharacter(); 
  lcd_goto(5); 
  lcd_puts("00:00:00");

  GIE = 1;  // Global Interruption Enable

  lcd_goto(69); 
  lcd_puts("http://www.dpi.ufv.br");
  
  while(1){
     if (show) {
   // RB4 = clock/cronograph
   // RB5 = start/stop
   // RB6 = clean
      if(RB4 == 0  ){ 

         if ( (centesimos == 0) || oldrb4  ) {
         oldrb4 = 0;
         
         lcd_goto(5); 
         SendNumbertoLCD(h); 
         lcd_goto(8); 
         SendNumbertoLCD(m); 
         lcd_goto(11); 
         SendNumbertoLCD(s); 
         }

         if(RB5 == 0 && inicia_cr == 0){
            m_cr = 0; 
            s_cr = 0; 
            c_cr = 0; 
            
         }
         if (RB5 == 1){
            ajuste++;
            if (ajuste >3)
               ajuste=1;
         }
         
         while (RB5 == 1){
            
            if (RB6 == 0)
               n = 0;
               
            if (RB6 == 1 && n == 0){
               if (ajuste == 1)
                  h++;
               else if (ajuste ==2)
                  m++;
               else if (ajuste == 3)
                  s++;
               n=1;
            }
            
            lcd_goto(5); 
            SendNumbertoLCD(h); 
            lcd_goto(8); 
            SendNumbertoLCD(m); 
            lcd_goto(11); 
            SendNumbertoLCD(s); 

         }

      }
      else if(RB4 == 1 ){ 
               
               if(RB5 == 0){

                  if( Aux == 1){
                  
                     Aux = 0;
                  }

                  
               }
               else{

                  Aux = 1;

               
               }

            
               lcd_goto(5);  
               SendNumbertoLCD(m_cr); 
               lcd_goto(8);  
               SendNumbertoLCD(s_cr); 
               lcd_goto(11);   
               SendNumbertoLCD(c_cr); 
            

           if(RB6 == 1){ 
               
               m_cr = 0; 
               s_cr = 0; 
               c_cr = 0; 
            }


      }
      show = 0;
   }
  }
}

static void interrupt isr(void) {
// se interrup玢o em TMR0
   if ( T0IF == 1 ) {
   i++;
      TMR0=130;
       if ( i == FATOR ) {
            i = 0;
            centesimos++;

            if( Aux == 1)
               c_cr++;

            show = 1;

       }
   if(centesimos == 100){
         s++;
         centesimos = 0;
   }

      // hour
   if ( s == 60 ) {
            m++;
            s = 0;
       }
       if ( m == 60 ) {
            h++;
            m = 0;
       }
       if ( h == 24 ) {
            h = 0;
       }

   // cronograph
       if ( c_cr == 100 ) {
            s_cr++;
            c_cr = 0;
       }
       if ( s_cr == 60 ) {
            m_cr++;
            s_cr = 0;
       }
       if ( m_cr == 60 ) {
            m_cr = 0;
       }

        T0IF = 0;  // zera flag de interrupcao em TMR0
   }

}