[nghong]

minh dang viet ct doc ds1307 bang mikro C 5.61 cho pic16f877a. khong biet sao m lam giong huong dan trong thu vien cua mikro C. ma doc RTC k duoc chi hien thi tren LCD toan la so 0. Duoi day la code va file mo phong cua m co ai hieu li do sao k giup m voi.



//define pin LCD
sbit lcd_rs at rd0_bit;
sbit lcd_en at rd1_bit;
sbit lcd_d4 at rd2_bit;
sbit lcd_d5 at rd3_bit;
sbit lcd_d6 at rd4_bit;
sbit lcd_d7 at rd5_bit;
// define tris register
sbit LCD_RS_Direction at TRISD0_BIT;
sbit LCD_EN_Direction at TRISD1_BIT;
sbit LCD_D4_Direction at TRISD2_BIT;
sbit LCD_D5_Direction at TRISD3_BIT;
sbit LCD_D6_Direction at TRISD4_BIT;
sbit LCD_D7_Direction at TRISD5_BIT;

char buff,seconds,minutes;
char read_ds1307(char address)
{
i2c1_start();
i2c1_wr(0xd0);
i2c1_wr(address);
i2c1_repeated_start();
i2c1_wr(0xd1);
buff = i2c1_rd(0);
i2c1_stop();
return(buff);
}
char write(char address,char data1)
{
i2c1_start();
i2c1_wr(0xd0);
i2c1_wr(address);
i2c1_wr(data1);
i2c1_stop();
return (0x01);
}
void main()
{
trisd = 0; trisc = 0;
portb = 0;
lcd_init();
i2c1_init(100000);
Lcd_Cmd(_LCD_CLEAR);
Lcd_Cmd(_LCD_CURSOR_OFF);
lcd_out(1,3,"giao tiep ds1307");
minutes = write(0x00,0x53);
minutes = write(0x01,0x03);
minutes = write(0x02,0x02);
while(1)
{
seconds = read_ds1307(0);
buff = seconds & 0x0F;
LCD_Chr(3,15,buff + 48 );
buff =seconds >> 4 ;
LCD_Chr(3,14,buff + 48);


seconds = read_ds1307(1);
buff = seconds & 0x0F;
LCD_Chr(3,11,buff + 48 );
buff =seconds >> 4 ;
LCD_Chr(3,10,buff + 48);


seconds = read_ds1307(2);
buff = seconds & 0x0F;
LCD_Chr(3,7,buff + 48 );
buff =seconds >> 4 ;
LCD_Chr(3,6,buff + 48);
}
}