Akses RTC dengan CVAVR DS1307

Source Code 

/*******************************************************

This program was created by the

CodeWizardAVR V3.12 Advanced

Automatic Program Generator

© Copyright 1998-2014 Pavel Haiduc, HP InfoTech s.r.l.

http://www.hpinfotech.com

Project : 

Version : 

Date    : 10/23/2017

Author  : 

Company :Add-Elektronik 

Comments:Add-Elektronik.blogspot.com 

Chip type               : ATmega32

Program type            : Application

AVR Core Clock frequency: 12.000000 MHz

Memory model            : Small

External RAM size       : 0

Data Stack size         : 512

*******************************************************/

#include <mega32.h>

#include <delay.h>

#include <stdio.h>

// I2C Bus functions

#include <i2c.h>

// DS1307 Real Time Clock functions

#include <ds1307.h>

// Alphanumeric LCD functions

#include <alcd.h>

unsigned char hour,min,sec;

unsigned char week_day,day,mont,year;

unsigned char temp [16];

unsigned char temp1 [16];

unsigned char buffer [16];

flash char * flash week_day_string[7]={"senin","selasa","rabu","kamis","jumat","sabtu","minggu"};

void week_day_tampil(unsigned char hari);

void main(void)

{

// Bit-Banged I2C Bus initialization

// I2C Port: PORTA

// I2C SDA bit: 1

// I2C SCL bit: 0

// Bit Rate: 100 kHz

// Note: I2C settings are specified in the

// Project|Configure|C Compiler|Libraries|I2C menu.

i2c_init();

//rtc_set_time(12,0,0);//set hour,min,sec

rtc_set_date(6,1,11,17);//set week_day,day,mont,year

// DS1307 Real Time Clock initialization

// Square wave output on pin SQW/OUT: Off

// SQW/OUT pin state: 0

rtc_init(0,0,0);

// Alphanumeric LCD initialization

// Connections are specified in the

// Project|Configure|C Compiler|Libraries|Alphanumeric LCD menu:

// RS - PORTC Bit 0

// RD - PORTC Bit 1

// EN - PORTC Bit 2

// D4 - PORTC Bit 4

// D5 - PORTC Bit 5

// D6 - PORTC Bit 6

// D7 - PORTC Bit 7

// Characters/line: 16

lcd_init(16);

lcd_gotoxy(0,0);

lcd_putsf("RTC AVR 70");

delay_ms(3000);

lcd_clear();// untuk menghapus character LCD

while (1)

      {

       rtc_get_time(&hour,&min,&sec);// mengambil data waktu jam,menit,detik

       lcd_gotoxy(0,0);

       sprintf(temp,"%d:%d:%d",hour,min,sec); //%d menampilkan nilai decimal// sprintf = string

       lcd_puts(temp); // menampilkan memori "temp"

       

       rtc_get_date(&week_day,&day,&mont,&year); 

       

      lcd_gotoxy(7,1);

      sprintf(temp1,"%d:%d:%d",day,mont,2000+year);

      lcd_puts(temp1);  

       

       week_day_tampil(week_day);

      }

}

void week_day_tampil(unsigned char hari)

{

   lcd_gotoxy(0,1);

   sprintf(buffer,"%p", week_day_string[hari]);

   lcd_puts(buffer);

}

Refferensi 

[1] Code Vision AVR

[2] ATMEL Atmega32