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tieungu13
Joined: 03 Mar 2010
Posts: 6
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| help me about DS1307 |
 Posted: Wed Jun 02, 2010 1:36 am |
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Hi everybody. I'm from Vietnam. I'm working on a project about DS1307 (real time) connect LCD (16x2). I used CCS software. I have a problem in Void main. I don't know to call function of DS1307. Please help me.
| Code: |
/////////////////////////my function/////////////
//#use fast_io(b)
#define DS1307_SCL PIN_c3
#define DS1307_SDA PIN_c4
#use i2c(master, fast, sda=DS1307_SDA, scl=DS1307_SCL)
//===================================
int rm_bcd(BYTE data) // CHUYEN BCD SANG SO NGUYEN
{
int i;
i=data;
data=(i>>4)*10;
data=data+(i<<4>>4);
return data;
}
// Convert normal decimal numbers to binary coded decimal
int8 decToBcd(int8 val)
{
return ( (val/10*16) + (val%10) );
}
// Convert binary coded decimal to normal decimal numbers
int8 bcdToDec(int8 val)
{
return ( (val/16*10) + (val%16) );
}
//==========================
// initial DS1307
//==========================
void init_DS1307()
{
output_float(DS1307_SCL);
output_float(DS1307_SDA);
}
//==========================
// write data one byte to
// DS1307
//==========================
void write_DS1307(byte address, BYTE data)
{
short int status;
i2c_start();
i2c_write(0xd0);
i2c_write(address);
i2c_write(data);
i2c_stop();
i2c_start();
status=i2c_write(0xd0);
while(status==1)
{
i2c_start();
status=i2c_write(0xd0);
}
}
//==========================
// read data one byte from DS1307
//==========================
BYTE read_DS1307(byte address)
{
BYTE data;
i2c_start();
i2c_write(0xd0);
i2c_write(address);
i2c_start();
i2c_write(0xd1);
data=i2c_read(0);
i2c_stop();
return(data);
}
// 1) Sets the date and time on the ds1307
// 2) Starts the clock
// 3) Sets hour mode to 24 hour clock
// Assumes you're passing in valid numbers
void setDateDs1307(int8 second, // 0-59
int8 minute, // 0-59
int8 hour, // 1-23
int8 dayOfWeek, // 1-7
int8 dayOfMonth, // 1-28/29/30/31
int8 month, // 1-12
int8 year) // 0-99
{
write_DS1307(0x0, decToBcd(second)); // 0 to bit 7 starts the clock
write_DS1307(0x1, decToBcd(minute));
write_DS1307(0x2, decToBcd(hour)); // If you want 12 hour am/pm you need to set
// bit 6 (also need to change readDateDs1307)
write_DS1307(0x3, decToBcd(dayOfWeek));
write_DS1307(0x4, decToBcd(dayOfMonth));
write_DS1307(0x5, decToBcd(month));
write_DS1307(0x6, decToBcd(year));
}
/*
//viet ra gia tri thoi gian
void write_RTC(int add, BYTE data)
{
short int status;
i2c_start(); // bao hieu bat dau giao tiep i2c
i2c_write(0xd0); // dia chi thiet bi nhan
i2c_write(add); // dia chi thanh ghi
i2c_write(data); //gui data vao dia chi thanh ghi cua thiet bi nhan
i2c_write(0x90);
i2c_stop(); // bao hieu ngung ghi
i2c_start(); // bao hieu bat dau giao tiep
status=i2c_write(0xd0); //kiem tra trang thai cua thiet bi nhan
while(status==1) //lap lai cho den khi thiet bi da nhan xong (No Ack)
{
i2c_start();
status=i2c_write(0xd0);
}
delay_us(10);
}
//doc gia tri thoi gian
BYTE read_RTC(int add)
{
BYTE data;
i2c_start();
i2c_write(0xd0);
i2c_write(add);
i2c_start();
i2c_write(0xd1);
data=i2c_read(0); // No Ack
i2c_stop();
delay_ms(10);
return(data);
}
*/
//================================================ |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Wed Jun 02, 2010 11:44 am |
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Try to use this ds1307 driver and the example code:
http://www.ccsinfo.com/forum/viewtopic.php?t=23255
Make certain that:
1. You have a 4.7K pull-up resistor on each i2c line: SDA and SCL.
2. You have a 3 volt lithium battery on the Vbat pin of the ds1307.
3. You must have a 32.768 KHz watch crystal on the ds1307.
Notice how this little board has the pull-up resistors, the battery, and
the watch crystal. All of these are needed. If you forget one of them,
your project will not work.
http://www.futurlec.com/Pictures/ET-MINI_DS1307.jpg |
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tieungu13
Joined: 03 Mar 2010
Posts: 6
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| Posted: Wed Jun 02, 2010 11:57 am |
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| PCM programmer wrote: | Try to use this ds1307 driver and the example code:
http://www.ccsinfo.com/forum/viewtopic.php?t=23255
Make certain that:
1. You have a 4.7K pull-up resistor on each i2c line: SDA and SCL.
2. You have a 3 volt lithium battery on the Vbat pin of the ds1307.
3. You must have a 32.768 KHz watch crystal on the ds1307.
Notice how this little board has the pull-up resistors, the battery, and
the watch crystal. All of these are needed. If you forget one of them,
your project will not work.
http://www.futurlec.com/Pictures/ET-MINI_DS1307.jpg |
Thanks for helping. I will try now ! |
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tieungu13
Joined: 03 Mar 2010
Posts: 6
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| Posted: Wed Jun 02, 2010 1:13 pm |
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I try but it did not work. I want to show values (min , hour, sec, month , date....) on the LCD.
This is my code and I demo on proteus. I used 18f4550 pic.
| Code: |
///////////////////////////my function ////////////
#include "C:\Users\Thanh Hai\Desktop\final code\18F4550.h"
#use delay(clock=20000000)
#fuses HS
#define RTC_SDA PIN_B0
#define RTC_SCL PIN_B1
#use i2c(master, sda=RTC_SDA, scl=RTC_SCL)
#include <lcd_lib_8bit.c>
#include <ds1307_thuong.c>
void main()
{
BYTE sec;
BYTE min;
BYTE hrs;
BYTE day;
BYTE month;
BYTE yr;
BYTE dow;
ds1307_init();
ds1307_set_date_time(15,6,5,2,15,20,55);
setup_adc_ports(NO_ANALOGS|VSS_VDD);
setup_adc(ADC_OFF);
setup_psp(PSP_DISABLED);
setup_spi(FALSE);
setup_wdt(WDT_OFF);
setup_timer_0(RTCC_INTERNAL);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
setup_comparator(NC_NC_NC_NC);
setup_vref(FALSE);
setup_oscillator(False);
Lcd_init();
//set_tris_b(0x00);
///set_tris_d(0x00);
// TODO: USER CODE!!
while(1)
{
delay_ms(1000);
ds1307_get_date(day,month,yr,dow);
ds1307_get_time(hrs,min,sec);
printf(LCD_putchar,"\f\%02d/\%02d/\%02d\r\n",day,month,yr);
printf(LCD_putchar,"\%02d:\%02d:\%02d", hrs,min,sec);
}
}
////////////////////////my lib LCD ////////////////
#define LCD_RS PIN_B2
//#define LCD_RW
#define LCD_EN PIN_B3
#define LCD_data Port_D
// misc display defines-
#define Line_1 0x80
#define Line_2 0xC0
#define Clear_Scr 0x01
// prototype statements
#separate void LCD_Init ( void );// ham khoi tao LCD
#separate void LCD_SetPosition ( unsigned int cX );//Thiet lap vi tri con tro
#separate void LCD_PutChar ( char cX );// Ham viet1kitu/1chuoi len LCD
#separate void LCD_PutCmd (int cX) ;// Ham gui lenh len LCD
#separate void LCD_PulseEnable ( void );
#separate int1 LCD_ready();
// D/n Cong
#use standard_io (D)
#use standard_io (B)
//khoi tao LCD**********************************************
#separate void LCD_Init ( void )
{
output_D(~0x00); delay_ms(200);
LCD_Putcmd(0x38);
LCD_Putcmd(0x0C);
LCD_Putcmd(0x01);
LCD_Putcmd(0x06);
}
#separate void LCD_PutChar ( char cX )
{
output_high(LCD_RS);
// output_low(LCD_RW);
output_D(cX);
LCD_PulseEnable();
delay_ms(5);
}
#separate void LCD_PutCmd (int cX )//Gui lenh den LCD
{
output_low(LCD_RS);//RS = 0
// output_low(LCD_RW);//RW = 0
output_D(cX); // Dua du lieu ra
LCD_PulseEnable();
delay_ms(5);
}
//#separate int1 LCD_ready ()
//{ int1 busy_flag;
// trisc7 = 1;//set input
// output_low(LCD_RS);
// output_high(LCD_RW);
// LCD_pulseEnable();
// busy_flag = RC7;
// return(busy_flag);
//}
#separate void LCD_PulseEnable ( void )
{
output_high ( LCD_EN );// E = 1
delay_us ( 3 ); // was 10
output_low ( LCD_EN );
delay_ms ( 3 ); // was 5
}
////////////////////////////my lib DS1307//////////
////////////////////////////////////////////////////////////////////////////////
/// DS1307.C ///
/// Driver for Real Time Clock ///
/// ///
/// ds1307_init() - Enable oscillator without clearing the seconds register -///
/// used when PIC loses power and DS1307 run from 3V BAT ///
/// - Disable squarewave output ///
/// ///
/// ds1307_set_date_time(day,mth,year,dow,hour,min,sec) Set the date/time ///
/// ///
/// ds1307_get_date(day,mth,year,dow) Get the date ///
/// ///
/// ds1307_get_time(hr,min,sec) Get the time ///
/// ///
////////////////////////////////////////////////////////////////////////////////
#define RTC_SDA PIN_B0
#define RTC_SCL PIN_B1
#use i2c(master, sda=RTC_SDA, scl=RTC_SCL)
BYTE bin2bcd(BYTE binary_value);
BYTE bcd2bin(BYTE bcd_value);
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 = bcd2bin(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(bin2bcd(seconds)); // Start oscillator with current "seconds value
i2c_start();
i2c_write(0xD0); // WR to RTC
i2c_write(0x07); // Control Register
i2c_write(0x80); // Disable squarewave output pin
i2c_stop();
}
void ds1307_set_date_time(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(bin2bcd(sec)); // REG 0
i2c_write(bin2bcd(min)); // REG 1
i2c_write(bin2bcd(hr)); // REG 2
i2c_write(bin2bcd(dow)); // REG 3
i2c_write(bin2bcd(day)); // REG 4
i2c_write(bin2bcd(mth)); // REG 5
i2c_write(bin2bcd(year)); // REG 6
i2c_write(0x80); // REG 7 - Disable squarewave output pin
i2c_stop();
}
void ds1307_get_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 = bcd2bin(i2c_read() & 0x7f); // REG 3
day = bcd2bin(i2c_read() & 0x3f); // REG 4
mth = bcd2bin(i2c_read() & 0x1f); // REG 5
year = bcd2bin(i2c_read(0)); // REG 6
i2c_stop();
}
void ds1307_get_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 = bcd2bin(i2c_read() & 0x7f);
min = bcd2bin(i2c_read() & 0x7f);
hr = bcd2bin(i2c_read(0) & 0x3f);
i2c_stop();
}
BYTE bin2bcd(BYTE binary_value)
{
BYTE temp;
BYTE retval;
temp = binary_value;
retval = 0;
while(1)
{
// Get the tens digit by doing multiple subtraction
// of 10 from the binary value.
if(temp >= 10)
{
temp -= 10;
retval += 0x10;
}
else // Get the ones digit by adding the remainder.
{
retval += temp;
break;
}
}
return(retval);
}
// Input range - 00 to 99.
BYTE bcd2bin(BYTE bcd_value)
{
BYTE temp;
temp = bcd_value;
// Shifting upper digit right by 1 is same as multiplying by 8.
temp >>= 1;
// Isolate the bits for the upper digit.
temp &= 0x78;
// Now return: (Tens * 8) + (Tens * 2) + Ones
return(temp + (temp >> 2) + (bcd_value & 0x0f));
} |
I hope every one will help me ! Thanks To All. |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Wed Jun 02, 2010 1:17 pm |
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| Quote: | | I try but it did not work. |
Tell us what you see. Give the details on how "it did not work". |
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tieungu13
Joined: 03 Mar 2010
Posts: 6
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| Posted: Wed Jun 02, 2010 11:42 pm |
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| PCM programmer wrote: | | Quote: | | I try but it did not work. |
Tell us what you see. Give the details on how "it did not work". |
This is my project: time, date, sec, min ....the values did not show on the LCD.
I have a Proteus file in the folder. Please check it for me. Thanks.
http://megashare.vn/dl.php/1232346 |
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