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12/09/2012 #1


Buenas noches este es mi segundo post
tengo un problema procedere a explicarlo.

Estoy conectando un ds1307 a un pic18f4550, tengo todas las conexiones hechas yo.
Para poder probar el circuito decidí poner los valores iniciales en 23 horas 59 min 55 segundos para poder observar el cambio de los días.

Todo va perfecto hasta que llego al domingo.
El domingo no se devuelve al día lunes. Se queda el domingo puesto en pantalla.
Y necesito solucionar eso que cada vez que termine la semana vuelva a empezar.

Necesito mostrar en la pantalla solo el día.

Aquí anexo mi código hecho ccs
Código:
#include <18f4550.h>
#fuses HSPLL,NOWDT,NOPROTECT,NOLVP,NODEBUG,NOBROWNOUT,USBDIV,PLL5,CPUDIV1,VREGEN,PUT,MCLR
#use delay(clock=20000000)
#include <lcd.c> 

 
#include <_ds1307.c> 

void main()
{ 

const char days_of_week[7][11]={"Lunes\0","Martes\0","Miercoles\0","Jueves\0","Viernes\0","Sabado\0","Domingo\0"};

int8 dato=0;            //Dato a enviar o leer de memoria
int32 address;          //Dirección de almacenamiento de la memoria eeprom
int dat,dat1,dat2;      //variables de almacenamiento de los datos leidos de la memoria eeprom



//parametros de inicializacion del reloj de tiempo real
byte sec;             //segundos
byte min;            //minutos
byte hrs;            //horas
byte day;            //dia
byte month;           //mes
byte yr;             //año
byte dow;
char sdow[11];


lcd_init ();


do
{
 ds1307_init(DS1307_OUT_ON_DISABLED_HIHG | DS1307_OUT_ENABLED | DS1307_OUT_32_KHZ);
 ds1307_set_date_time(day,mONth,yr,dow,hrS,min,sec); // - parametros de inicializacion del DS1307


   delay_ms (100);
  
   ds1307_get_day_of_week((char*) sdow);
   ds1307_get_date(day,month,yr,dow);
   ds1307_get_time(hrs,min,sec);
   
   
   lcd_gotoxy (1,1);
   printf(lcd_putc,"%s",sdow);
   
   
   
   

}while (true);
}
---------- Actualizado después de 45 minutos ----------
Anexo la librería
Código:
///////////////////////////////////////////////////////////////////////////////////////
///                               DS1307.C                                           ///
///                     Driver for Real Time Clock                                   ///
///                     modified by Redpic 08/2006                                   ///
///                  http://picmania.garcia-cuervo.com                               ///
///                                                                                  ///
/// void ds1307_init(val)                                                            ///
///                  - Enable oscillator without clearing the seconds register       ///
///                    used when PIC loses power and DS1307 run from 3V BAT          ///
///                  - Config Control Register with next parameters:                 ///
///                     DS1307_ALL_DISABLED          All disabled                    ///
///                     DS1307_OUT_ON_DISABLED_HIHG  Out to Hight on Disable Out     ///
///                     DS1307_OUT_ENABLED           Out Enabled                     ///
///                     DS1307_OUT_1_HZ              Freq. Out to 1 Hz               ///
///                     DS1307_OUT_4_KHZ             Freq. Out to 4.096 Khz          ///
///                     DS1307_OUT_8_KHZ             Freq. Out to 8.192 Khz          ///
///                     DS1307_OUT_32_KHZ            Freq. Out to 32.768 Khz         ///
///                                                                                  ///
///                     Example init:                                                ///
///                     ds1307_init(DS1307_ALL_DISABLED);                            ///
///                     ds1307_init(DS1307_OUT_ENABLED | DS1307_OUT_1_HZ);           ///
///                                                                                  ///
/// void ds1307_set_date_time(day,mth,year,dow,hour,min,sec) - Set the date/time     ///
///                                                                                  ///
/// void ds1307_get_date(day,mth,year,dow)                   - Get the date          ///
///                                                                                  ///
/// void ds1307_get_time(hr,min,sec)                         - Get the time          ///
///                                                                                  ///
/// char ds1307_read_nvram_byte(char addr)                   - Read byte in address  ///
///                                                                                  ///
/// void ds1307_write_nvram_byte(char addr, char value)      - Write byte in address ///
///                                                                                  ///
/// void ds1307_get_day_of_week(char* ptr)                   - Get string Day Of Week///
///                                                                                  ///
/// If defined USE_INTERRUPTS all functions disable Global Interrupts on starts and  ///
///                           enable Global on ends else usar can do it hiself       ///
///                                                                                  ///
///////////////////////////////////////////////////////////////////////////////////////

#ifndef RTC_SDA
#define RTC_SDA  PIN_C7
#define RTC_SCL  PIN_C6
#endif

#use i2c(master, sda=RTC_SDA, scl=RTC_SCL)

#define DS1307_ALL_DISABLED         0b00000000 // All disabled
#define DS1307_OUT_ON_DISABLED_HIHG 0b10000000 // Out to Hight on Disable Out
#define DS1307_OUT_ENABLED          0b00010000 // Out Enabled
#define DS1307_OUT_1_HZ             0b00000000 // Freq. Out to 1 Hz
#define DS1307_OUT_4_KHZ            0b00000001 // Freq. Out to 4.096 Khz
#define DS1307_OUT_8_KHZ            0b00000010 // Freq. Out to 8.192 Khz
#define DS1307_OUT_32_KHZ           0b00000011 // Freq. Out to 32.768 Khz

#define Start_user_address_nvram    0x08
#define End_user_address_nvram      0x3f

char days_of_week[7][11]={"Lunes\0","Martes\0","Miercoles\0","Jueves\0","Viernes\0","Sabado\0","Domingo\0"};

byte ds1307_bin2bcd(byte binary_value);
byte ds1307_bcd2bin(byte bcd_value);

void ds1307_init(int val){

   byte seconds = 0;

#ifndef USE_INTERRUPTS
   disable_interrupts(global);
#endif

   i2c_start();
   i2c_write(0xD0);
   i2c_write(0x00);
   i2c_start();
   i2c_write(0xD1);
   seconds = ds1307_bcd2bin(i2c_read(0));
   i2c_stop();
   seconds &= 0x7F;

   delay_us(3);

   i2c_start();
   i2c_write(0xD0);
   i2c_write(0x00);
   i2c_write(ds1307_bin2bcd(seconds));
   i2c_start();
   i2c_write(0xD0);
   i2c_write(0x07);
   i2c_write(val);
   i2c_stop();

#ifndef USE_INTERRUPTS
   enable_interrupts(global);
#endif

}

void ds1307_set_date_time(byte day, byte mth, byte year, byte dow, byte hr, byte min, byte sec){

#ifndef USE_INTERRUPTS
   disable_interrupts(global);
#endif

  sec &= 0x7F;
  hr &= 0x3F;

  i2c_start();
  i2c_write(0xD0);
  i2c_write(0x00);
  i2c_write(ds1307_bin2bcd(sec));
  i2c_write(ds1307_bin2bcd(min));
  i2c_write(ds1307_bin2bcd(hr));
  i2c_write(ds1307_bin2bcd(dow));
  i2c_write(ds1307_bin2bcd(day));
  i2c_write(ds1307_bin2bcd(mth));
  i2c_write(ds1307_bin2bcd(year));
  i2c_stop();

#ifndef USE_INTERRUPTS
   enable_interrupts(global);
#endif

}

void ds1307_get_date(byte &day, byte &mth, byte &year, byte &dow){

#ifndef USE_INTERRUPTS
   disable_interrupts(global);
#endif

  i2c_start();
  i2c_write(0xD0);
  i2c_write(0x03);
  i2c_start();
  i2c_write(0xD1);
  dow  = ds1307_bcd2bin(i2c_read() & 0x7f);
  day  = ds1307_bcd2bin(i2c_read() & 0x3f);
  mth  = ds1307_bcd2bin(i2c_read() & 0x1f);
  year = ds1307_bcd2bin(i2c_read(0));
  i2c_stop();

#ifndef USE_INTERRUPTS
   enable_interrupts(global);
#endif

}

void ds1307_get_time(byte &hr, byte &min, byte &sec){

#ifndef USE_INTERRUPTS
   disable_interrupts(global);
#endif

  i2c_start();
  i2c_write(0xD0);
  i2c_write(0x00);
  i2c_start();
  i2c_write(0xD1);
  sec = ds1307_bcd2bin(i2c_read() & 0x7f);
  min = ds1307_bcd2bin(i2c_read() & 0x7f);
  hr  = ds1307_bcd2bin(i2c_read(0) & 0x3f);
  i2c_stop();

#ifndef USE_INTERRUPTS
   enable_interrupts(global);
#endif

}


char ds1307_read_nvram_byte(char addr){

   char retval;

#ifndef USE_INTERRUPTS
   disable_interrupts(global);
#endif

   i2c_start();
   i2c_write(0xD0);
   i2c_write(addr);

   i2c_start();
   i2c_write(0xD1);
   retval = i2c_read(0);
   i2c_stop();

   return(retval);

#ifndef USE_INTERRUPTS
   enable_interrupts(global);
#endif

}

void ds1307_write_nvram_byte(char addr, char value){

#ifndef USE_INTERRUPTS
   disable_interrupts(global);
#endif

   i2c_start();
   i2c_write(0xD0);
   i2c_write(addr);
   i2c_write(value);
   i2c_stop();

#ifndef USE_INTERRUPTS
   enable_interrupts(global);
#endif

}

void ds1307_get_day_of_week(char* ptr){

   byte lday;
   byte lmonth;
   byte lyr;
   byte ldow;
   ds1307_get_date(lday,lmonth,lyr,ldow);
   sprintf(ptr,"%s",days_of_week[ldow]);
}

///////////////////////////////////////////////////////////////////////////////

byte ds1307_bin2bcd(byte binary_value){

  byte temp;
  byte retval;

  temp = binary_value;
  retval = 0;
  while(1){
    if(temp >= 10){
      temp -= 10;
      retval += 0x10;
    }else{
      retval += temp;
      break;
    }
  }
  return(retval);
}

byte ds1307_bcd2bin(byte bcd_value){

  byte temp;

  temp = bcd_value;
  temp >>= 1;
  temp &= 0x78;
  return(temp + (temp >> 2) + (bcd_value & 0x0f));
}

///////////////////////////////////////////////////////////////////////////////
Espero su ayuda.
Respuesta
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