| thientaisodo |
26-03-2009 05:04 PM |
Các bác cho code lởm !
Em làm DS1307, lấy code của các bác về nhúng vào chip, lúc thì ra toàn "!", lúc thì ra mã ASCII, mày mò gần một buổi, tính lại công thức thì chạy đúng. :((
Đây là code giao tiếp giữa 877A, LCD và DS1307
Code:
#include <16F877A.h>
#include <def_877a.h>
#device *=16 ADC=10
#fuses NOWDT, HS, NOPUT, NOPROTECT, NODEBUG, NOBROWNOUT, NOLVP,
#use delay(clock=20000000)
#use i2c(master,sda=PIN_C4,scl=PIN_C3,force_hw,Slow)
#include <lcd_lib_4bit.c>
#include <1307.c>
int8 day,mth,year,dow,hr,min,sec;
void hienthi()
{ int8 so1,so2,so3,so4,so5,so6,so7,so8,so9,so10,so11,so12;
LCD_init(); // Khoi tao LCD
printf(LCD_putchar,"Thu ");
dow=(dow & 0x07);
dow=(dow + 0x30);
LCD_putchar(dow);
printf(LCD_putchar,"-");
so1=(day & 0x30)>>4;
so1=so1 + 0x30;
LCD_putchar(so1);
so2=(day & 0x0F);
so2=so2 + 0x30;
LCD_putchar(so2);
printf(LCD_putchar,"-");
so3=(mth & 0x10)>>4;
so3=so3 + 0x30;
LCD_putchar(so3);
so4=mth & 0x0F;
so4=so4 + 0x30;
LCD_putchar(so4);
printf(LCD_putchar,"-");
so5=(year & 0xF0)>>4;
so5=so5 + 0x30;
LCD_putchar(so5);
so6=(year & 0x0F);
so6=so6 + 0x30;
LCD_putchar(so6);
lcd_putcmd(0xC0);
printf(lcd_putchar, " ");
so7=(hr & 0x30)>>4;
so7=so7 + 0x30;
LCD_putchar(so7);
so8=(hr & 0x0F);
so8=so8 + 0x30;
LCD_putchar(so8);
printf(lcd_putchar, ":");
so9=(min & 0x70)>>4;
so9=so9 + 0x30;
LCD_putchar(so9);
so10=(min & 0x0F);
so10=so10 + 0x30;
LCD_putchar(so10);
printf(lcd_putchar, ":");
so11=(sec & 0x70)>>4;
so11=so11 + 0x30;
LCD_putchar(so11);
so12=(sec & 0x0F);
so12=so12 + 0x30;
LCD_putchar(so12);
printf(lcd_putchar, " ");
}
void main()
{
/* Thoi gian khoi tao cho RTC
ds1307_init();
day=0x26;
mth=0x03;
year=0x09;
dow=0x05;
hr=0x16;
min=0x45;
sec=0x00;
ds1307_setup(day,mth,year,dow,hr, min,sec);
*/
hienthi();
ds1307_init();
while(1)
{
read_date(day,mth,year,dow);
read_time(hr,min,sec);
hienthi();
}
}
Nếu khởi tạo thời gian thì cho dịch cả đoạn này
Code:
ds1307_init();
day=0x26;
mth=0x03;
year=0x09;
dow=0x05;
hr=0x16;
min=0x45;
sec=0x00;
ds1307_setup(day,mth,year,dow,hr, min,sec);
Còn đây là file 1307.c
Code:
void ds1307_init(void)
{
BYTE seconds = 0;
i2c_start();
i2c_write(0xD0); // WR to RTC
i2c_write(0x00); // REG 0
i2c_start();
i2c_write(0xD1); // RD from RTC
seconds = i2c_read(0); // Read current "seconds" in DS1307
i2c_stop();
seconds &= 0x7F;
delay_us(3);
i2c_start();
i2c_write(0xD0); // WR to RTC
i2c_write(0x00); // REG 0
i2c_write(seconds); // Start oscillator with current "seconds value
i2c_start();
i2c_write(0xD0); // WR to RTC
i2c_write(0x07); // Control Register
i2c_write(0x90); // Enable squarewave output pin
i2c_stop();
}
void ds1307_setup(BYTE day, BYTE mth, BYTE year, BYTE dow, BYTE hr, BYTE min, BYTE sec)
{
sec &= 0x7F;
hr &= 0x3F;
i2c_start();
i2c_write(0xD0); // I2C write address
i2c_write(0x00); // Start at REG 0 - Seconds
i2c_write(sec); // REG 0
i2c_write(min); // REG 1
i2c_write(hr); // REG 2
i2c_write(dow); // REG 3
i2c_write(day); // REG 4
i2c_write(mth); // REG 5
i2c_write(year); // REG 6
i2c_write(0x90); // REG 7 - Disable squarewave output pin
i2c_stop();
}
void read_date(BYTE &day, BYTE &mth, BYTE &year, BYTE &dow)
{
i2c_start();
i2c_write(0xD0);
i2c_write(0x03); // Start at REG 3 - Day of week
i2c_start();
i2c_write(0xD1);
dow = i2c_read(); // REG 3
day = i2c_read(); // REG 4
mth = i2c_read(); // REG 5
year = i2c_read(0); // REG 6
i2c_stop();
}
void read_time(BYTE &hr, BYTE &min, BYTE &sec)
{
i2c_start();
i2c_write(0xD0);
i2c_write(0x00); // Start at REG 0 - Seconds
i2c_start();
i2c_write(0xD1);
sec = i2c_read();
min = i2c_read();
hr = i2c_read(0);
i2c_stop();
}
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