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mahatia
Joined: 14 Nov 2016
Posts: 23
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| PIC12F675+PCF8574+LCD 16x2+ RTC DS1307 |
 Posted: Tue Nov 15, 2016 2:41 am |
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| Hello everybody! Is someone could help me to display date and time from RTC DS1307 on LCD ? I have to use PIC12F675 and my LCD is connected with PCF8574! What should I do! I have already used the code that someone has posted here to display something on lcd by using PCF8574 and PIC12F675 and its works, but now, I have to display time and date, what should I do? |
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Mike Walne
Joined: 19 Feb 2004
Posts: 1785
Location: Boston Spa UK
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| Posted: Tue Nov 15, 2016 3:15 am |
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Work out what you want to put on the display, then write your own code.
Mike |
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mahatia
Joined: 14 Nov 2016
Posts: 23
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| Posted: Tue Nov 15, 2016 4:13 am |
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Ok! This is my schematic capture from Proteus.
[https://drive.google.com/file/d/0BwhZ3_I-f9gham9iMExDUjBNbHc/view?usp=sharing]
and this is my code:
[https://drive.google.com/drive/folders/0BwhZ3_I-f9ghUGFpY3kzeGQyd1k?usp=sharing]
Thank you. |
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temtronic
Joined: 01 Jul 2010
Posts: 9246
Location: Greensville,Ontario
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| Posted: Tue Nov 15, 2016 5:57 am |
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Well I'd use the 'search' feature of this forum and find the DS1307 'driver'. There's 2 or 3 ... 2 for sure, I know they both work though I modified one for my use. If the Ext_int pin of the 12F675 is available, I'd connect the DS1307 to it and use an ISR to display the date/time information. I use the 1Hz interrupt from the 1307 this way.
Jay |
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Mike Walne
Joined: 19 Feb 2004
Posts: 1785
Location: Boston Spa UK
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| Posted: Tue Nov 15, 2016 6:25 am |
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Your link expects me to create or sign in to an account.
I'm not going to do it.
Mike |
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mahatia
Joined: 14 Nov 2016
Posts: 23
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| Posted: Tue Nov 15, 2016 10:11 am |
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| I'm so sorry, I'll post it here soon,thanks |
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mahatia
Joined: 14 Nov 2016
Posts: 23
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| Posted: Tue Nov 15, 2016 1:11 pm |
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these are my code, i saw them in this forum and I want to add an RTC ds1307.
I2C_LCD.c
| Code: | #include <12F675.h>
#device *= 16
#fuses NOWDT, PROTECT, CPD, NOMCLR, INTRC_IO, BROWNOUT, PUT
#use delay (internal = 4MHz)
#include "lcd.c"
void setup();
void main()
{
unsigned char i = 0;
char txt1[] = {"RAMANANTSOA"};
char txt2[] = {"Projet 2"};
//char txt[6];
setup();
while(TRUE)
{
LCD_clear_home();
for(i = 0; i <= 10; i++)
{
LCD_goto((i), 0);
LCD_putchar(txt1[i]);
delay_ms(99);
}
for(i = 0; i <= 9; i++)
{
LCD_goto((i), 1);
LCD_putchar(txt2[i]);
// delay_ms(99);
}
};
}
void setup()
{
disable_interrupts(GLOBAL);
setup_comparator(NC_NC_NC_NC);
setup_ADC(ADC_off);
setup_ADC_ports(no_analogs);
setup_timer_0(T0_internal);
setup_timer_1(T1_disabled);
set_timer0(0);
set_timer1(0);
LCD_init();
delay_ms(100);
} |
lcd.c
| Code: | #include "lcd.h"
void LCD_init()
{
unsigned char t = 0x1A;
data_value = 0x08;
PCF8574_write(data_value);
while(t > 0x00)
{
delay_ms(dly);
t--;
};
data_value = 0x30;
PCF8574_write(data_value);
data_value |= 0x08;
PCF8574_write(data_value);
delay_ms(dly);
data_value &= 0xF7;
PCF8574_write(data_value);
delay_ms(dly);
data_value = 0x30;
PCF8574_write(data_value);
data_value |= 0x08;
PCF8574_write(data_value);
delay_ms(dly);
data_value &= 0xF7;
PCF8574_write(data_value);
delay_ms(dly);
data_value = 0x30;
PCF8574_write(data_value);
data_value |= 0x08;
PCF8574_write(data_value);
delay_ms(dly);
data_value &= 0xF7;
PCF8574_write(data_value);
delay_ms(dly);
data_value = 0x20;
PCF8574_write(data_value);
data_value |= 0x08;
PCF8574_write(data_value);
delay_ms(dly);
data_value &= 0xF7;
PCF8574_write(data_value);
delay_ms(dly);
LCD_command(_4_pin_interface | _2_row_display | _5x7_dots);
LCD_command(display_on | cursor_off | blink_off);
LCD_command(clear_display);
LCD_command(cursor_direction_inc | display_no_shift);
}
void LCD_command(unsigned char value)
{
data_value &= 0xFB;
PCF8574_write(data_value);
LCD_4bit_send(value);
}
void LCD_send_data(unsigned char value)
{
data_value |= 0x04;
PCF8574_write(data_value);
LCD_4bit_send(value);
}
void LCD_4bit_send(unsigned char lcd_data)
{
unsigned char temp = 0x00;
temp = (lcd_data & 0xF0);
data_value &= 0x0F;
data_value |= temp;
PCF8574_write(data_value);
data_value |= 0x08;
PCF8574_write(data_value);
delay_ms(dly);
data_value &= 0xF7;
PCF8574_write(data_value);
delay_ms(dly);
temp = (lcd_data & 0x0F);
temp <<= 0x04;
data_value &= 0x0F;
data_value |= temp;
PCF8574_write(data_value);
data_value |= 0x08;
PCF8574_write(data_value);
delay_ms(dly);
data_value &= 0xF7;
PCF8574_write(data_value);
delay_ms(dly);
}
void LCD_putstr(char *lcd_string)
{
while (*lcd_string != '\0')
{
LCD_send_data(*lcd_string);
lcd_string++;
};
}
void LCD_putchar(char char_data)
{
LCD_send_data(char_data);
}
void LCD_clear_home()
{
LCD_command(clear_display);
LCD_command(goto_home);
}
void LCD_goto(unsigned char x_pos,unsigned char y_pos)
{
if(y_pos == 0)
{
LCD_command(0x80 | x_pos);
}
else
{
LCD_command(0x80 | 0x40 | x_pos);
}
} |
lcd.h
| Code: | #include "PCF8574.c"
#define clear_display 0x01
#define goto_home 0x02
#define cursor_direction_inc (0x04 | 0x02)
#define cursor_direction_dec (0x04 | 0x00)
#define display_shift (0x04 | 0x01)
#define display_no_shift (0x04 | 0x00)
#define display_on (0x08 | 0x04)
#define display_off (0x08 | 0x02)
#define cursor_on (0x08 | 0x02)
#define cursor_off (0x08 | 0x00)
#define blink_on (0x08 | 0x01)
#define blink_off (0x08 | 0x00)
#define _8_pin_interface (0x20 | 0x10)
#define _4_pin_interface (0x20 | 0x00)
#define _2_row_display (0x20 | 0x08)
#define _1_row_display (0x20 | 0x00)
#define _5x10_dots (0x20 | 0x40)
#define _5x7_dots (0x20 | 0x00)
#define dly 0x01
unsigned char data_value = 0x00;
void LCD_init();
void LCD_command(unsigned char value);
void LCD_send_data(unsigned char value);
void LCD_4bit_send(unsigned char lcd_data);
void LCD_putstr(char *lcd_string);
void LCD_putchar(char char_data);
void LCD_clear_home();
void LCD_goto(unsigned char x_pos, unsigned char y_pos); |
PCF8574.c
| Code: | #include "PCF8574.h"
unsigned char PCF8574_read()
{
unsigned char port_byte = 0;
i2c_start();
i2c_write(PCF8574_read_cmd);
port_byte = i2c_read(0);
i2c_stop();
return port_byte;
}
void PCF8574_write(unsigned char data_byte)
{
i2c_start();
i2c_write(PCF8574_write_cmd);
i2c_write(data_byte);
i2c_stop();
} |
PCF8574
| Code: | #define PCF8574_address 0x40
#define PCF8574_write_cmd PCF8574_address
#define PCF8574_read_cmd (PCF8574_address + 1)
#define SDA_pin pin_A5
#define SCL_pin pin_A4
#use I2C(Master, SDA = SDA_pin, SCL = SCL_pin)
unsigned char PCF8574_read();
void PCF8574_write(unsigned char data_byte); |
I use PIC12F675, what should I do if I want to display date and time from RTC?
I found this driver in this forum but I get many errors when I use it with my code
DS1307.c
| Code: |
#define RTC_SDA pin_A5
#define RTC_SCL pin_A4
#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(0x10); // 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
delay_us(1);
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_write(0x10);
i2c_stop();
}
void ds1307_get_date(BYTE &day, BYTE &mth, BYTE &year, BYTE &dow)
{
i2c_start();
i2c_write(0xD0);
delay_us(1);
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) IO NO TEO
while(TRUE)
{
// 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)); |
DS1307.h
| Code: |
#ifndef __DS1307_H
#define __DS1307_H
// Define DS1307 i2c device address
#define Device_Address_DS1307_EEPROM 0xD0
// Define Time Modes
#define AM_Time 0
#define PM_Time 1
#define TwentyFourHoursMode 2
// Define days
#define Monday 1
#define Tuesday 2
#define Wednesday 3
#define Thursday 4
#define Friday 5
#define Saturday 6
#define Sunday 7
// Function Declarations
void Write_Byte_To_DS1307_RTC(unsigned char, unsigned char);
unsigned char Read_Byte_From_DS1307_RTC(unsigned char);
void Write_Bytes_To_DS1307_RTC(unsigned char,unsigned char*,unsigned char);
void Read_Bytes_From_DS1307_RTC(unsigned char,unsigned char*,unsigned int);
void Set_DS1307_RTC_Time(unsigned char,unsigned char,unsigned char,unsigned char);
unsigned char* Get_DS1307_RTC_Time(void);
void Set_DS1307_RTC_Date(unsigned char,unsigned char,unsigned char,unsigned char);
unsigned char* Get_DS1307_RTC_Date(void);
#endif |
Thank you! |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Tue Nov 15, 2016 2:12 pm |
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This block of code will display the date and time from the ds1307 on an lcd:
| Code: | ds1307_get_date(day,month,yr,dow); // Read date
ds1307_get_time(hrs,min,sec); // Read Time
lcd_gotoxy(1,1);
printf(lcd_Putc,"\%02d/\%02d/\%02d",day,month,yr); // Display date
lcd_gotoxy(1,2);
printf(lcd_Putc," %02d:\%02d:\%02d", hrs,min,sec); // Display time |
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mahatia
Joined: 14 Nov 2016
Posts: 23
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| Posted: Tue Nov 15, 2016 5:18 pm |
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Thank you for helping me; I have tried the code, I do it like that
I2C_LCD.c
| Code: | #include "DS1307.c"
#include <12F675.h>
#device *= 16
#fuses NOWDT, PROTECT, CPD, NOMCLR, INTRC_IO, BROWNOUT, PUT
#use delay (internal = 4MHz)
#include "lcd.c"
void setup();
void main()
{
unsigned char i = 0;
char txt1[] = {"RAMANANTSOA"};
char txt2[] = {"Projet 2"};
//char txt[6];
setup();
while(TRUE)
{
LCD_clear_home();
for(i = 0; i <= 10; i++)
{
LCD_goto((i), 0);
LCD_putchar(txt1[i]);
delay_ms(99);
}
for(i = 0; i <= 9; i++)
{
LCD_goto((i), 1);
LCD_putchar(txt2[i]);
// delay_ms(99);
}
ds1307_init();
ds1307_get_date(day,month,yr,dow); // Read date
ds1307_get_time(hrs,min,sec); // Read Time
lcd_goto(1,1);
printf(lcd_putchar,"\%02d/\%02d/\%02d",day,month,yr); // Display date
lcd_goto(1,2);
printf(lcd_putchar," %02d:\%02d:\%02d", hrs,min,sec); // Display time
};
}
void setup()
{
disable_interrupts(GLOBAL);
setup_comparator(NC_NC_NC_NC);
setup_ADC(ADC_off);
setup_ADC_ports(no_analogs);
setup_timer_0(T0_internal);
setup_timer_1(T1_disabled);
set_timer0(0);
set_timer1(0);
LCD_init();
delay_ms(100);
} |
DS1307.c
| Code: |
#define RTC_SDA pin_A5
#define RTC_SCL pin_A4
#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(0x10); // 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
delay_us(1);
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_write(0x10);
i2c_stop();
}
void ds1307_get_date(BYTE &day, BYTE &mth, BYTE &year, BYTE &dow)
{
i2c_start();
i2c_write(0xD0);
delay_us(1);
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) IO NO TEO
while(TRUE)
{
// 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)); |
And after compiling, he asked me to put #DEVICE before this line
| Code: | | #use i2c(master, sda=RTC_SDA, scl=RTC_SCL) |
thank you! I am losed  |
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jeremiah
Joined: 20 Jul 2010
Posts: 1358
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| Posted: Wed Nov 16, 2016 7:58 am |
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Your program's first include MUST always be the the chip's header file. In your posted code it is not. General order:
Chip include file
#device statments
#fuses
#use delay() setup
other #use or includes
remaining code. |
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mahatia
Joined: 14 Nov 2016
Posts: 23
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| Posted: Wed Nov 16, 2016 9:19 am |
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| ok! let me try it! thank you very much for the idea! |
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mahatia
Joined: 14 Nov 2016
Posts: 23
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| Posted: Wed Nov 16, 2016 3:02 pm |
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I have done what you suggest me to do:
I2C_LCD.c
| Code: | #include <12F675.h>
#device *= 16
#fuses NOWDT, PROTECT, CPD, NOMCLR, INTRC_IO, BROWNOUT, PUT
#use delay (internal = 4MHz)
#include "lcd.c"
#include "DS1307.c"
void setup();
void main()
{
unsigned char i = 0;
char txt1[] = {"hello"};
char txt2[] = {"Projet 2"};
byte day;
byte mth;
byte year;
byte dow;
byte hr;
byte min;
byte sec;
setup();
while(TRUE)
{
LCD_clear_home();
for(i = 0; i <= 10; i++)
{
LCD_goto((i), 0);
LCD_putchar(txt1[i]);
delay_ms(99);
}
for(i = 0; i <= 9; i++)
{
LCD_goto((i), 1);
LCD_putchar(txt2[i]);
delay_ms(99);
}
while(TRUE)
{
ds1307_init();
ds1307_get_date(day,mth,year,dow); // Read date
ds1307_get_time(hr,min,sec); // Read Time
LCD_goto(1,1);
printf(LCD_putchar,"\%02d/\%02d/\%02d",day,mth,year); // Display date
LCD_goto(1,2);
printf(LCD_putchar," %02d:\%02d:\%02d",hr,min,sec); // Display time
};
};
}
void setup()
{
disable_interrupts(GLOBAL);
setup_comparator(NC_NC_NC_NC);
setup_ADC(ADC_off);
setup_ADC_ports(no_analogs);
setup_timer_0(T0_internal);
setup_timer_1(T1_disabled);
set_timer0(0);
set_timer1(0);
LCD_init();
delay_ms(100);
}
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After running and building, they send me this error message: Functions may not be nested. He underlines in red the void setup(); and void main() and setup();
I have tried to solve the problem but I couldn't find it! I am a beginner in CCS, could you help me for the last time please? |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Wed Nov 16, 2016 4:59 pm |
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Look at this function at the end of ds1307.c
| Quote: | | BYTE bcd2bin(BYTE bcd_value) |
You left off the ending brace on that function. You left off this:
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mahatia
Joined: 14 Nov 2016
Posts: 23
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| Posted: Mon Nov 21, 2016 10:32 am |
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thank you PCM programmer. I have tried the code and it works! But could tell me why the seconds takes a long time to increments when I simulate it with proteus? this is my code:
I2C_LCD.c
| Code: | #include <12F675.h>
#device *= 16
#fuses NOWDT, PROTECT, CPD, NOMCLR, INTRC_IO, BROWNOUT, PUT
#use delay (internal = 4MHz)
#include "lcd.c"
#include "DS1307.c"
void setup();
void main()
{
byte day;
byte mth;
byte year;
byte hr;
byte min;
byte sec;
setup();
while(TRUE)
{
ds1307_init();
ds1307_get_date(day,mth,year); // Read date
ds1307_get_time(hr,min,sec); // Read Time
LCD_goto(0,0);
printf(LCD_putchar," %02d:\%02d:\%02d",hr,min,sec); // Display time
LCD_goto(0,1);
printf(LCD_putchar,"\%02d/\%02d/20\%02d",day,mth,year); // Display date
};
while(TRUE)
{
};
}
void setup()
{
disable_interrupts(GLOBAL);
setup_comparator(NC_NC_NC_NC);
setup_ADC(ADC_off);
setup_ADC_ports(no_analogs);
setup_timer_0(T0_internal);
setup_timer_1(T1_disabled);
set_timer0(0);
set_timer1(0);
LCD_init();
delay_ms(100);
}
|
lcd.c
| Code: | #include "lcd.h"
void LCD_init()
{
data_value = 0x30;
PCF8574_write(data_value);
data_value = 0x20;
PCF8574_write(data_value);
data_value |= 0x08;
PCF8574_write(data_value);
delay_ms(dly);
data_value &= 0xF7;
PCF8574_write(data_value);
delay_ms(dly);
LCD_command(_4_pin_interface | _2_row_display | _5x7_dots);
LCD_command(display_on | cursor_off | blink_off);
LCD_command(clear_display);
LCD_command(cursor_direction_inc | display_no_shift);
}
void LCD_command(unsigned char value)
{
data_value &= 0xFB;
PCF8574_write(data_value);
LCD_4bit_send(value);
}
void LCD_send_data(unsigned char value)
{
data_value |= 0x04;
PCF8574_write(data_value);
LCD_4bit_send(value);
}
void LCD_4bit_send(unsigned char lcd_data)
{
unsigned char temp = 0x00;
temp = (lcd_data & 0xF0);
data_value &= 0x0F;
data_value |= temp;
PCF8574_write(data_value);
data_value |= 0x08;
PCF8574_write(data_value);
delay_ms(dly);
data_value &= 0xF7;
PCF8574_write(data_value);
delay_ms(dly);
temp = (lcd_data & 0x0F);
temp <<= 0x04;
data_value &= 0x0F;
data_value |= temp;
PCF8574_write(data_value);
data_value |= 0x08;
PCF8574_write(data_value);
delay_ms(dly);
data_value &= 0xF7;
PCF8574_write(data_value);
delay_ms(dly);
}
//void LCD_putstr(char *lcd_string)
//{
// while (*lcd_string != '\0')
// {
// LCD_send_data(*lcd_string);
// lcd_string++;
// };
//}
void LCD_putchar(char char_data)
{
LCD_send_data(char_data);
}
void LCD_clear_home()
{
LCD_command(clear_display);
LCD_command(goto_home);
}
void LCD_goto(unsigned char x_pos,unsigned char y_pos)
{
if(y_pos == 0)
{
LCD_command(0x80 | x_pos);
}
else
{
LCD_command(0x80 | 0x40 | x_pos);
}
}
|
lcd.h
| Code: | #include "PCF8574.c"
#define clear_display 0x01
#define goto_home 0x02
#define cursor_direction_inc (0x04 | 0x02)
#define cursor_direction_dec (0x04 | 0x00)
#define display_shift (0x04 | 0x01)
#define display_no_shift (0x04 | 0x00)
#define display_on (0x08 | 0x04)
#define display_off (0x08 | 0x02)
#define cursor_on (0x08 | 0x02)
#define cursor_off (0x08 | 0x00)
#define blink_on (0x08 | 0x01)
#define blink_off (0x08 | 0x00)
#define _8_pin_interface (0x20 | 0x10)
#define _4_pin_interface (0x20 | 0x00)
#define _2_row_display (0x20 | 0x08)
#define _1_row_display (0x20 | 0x00)
#define _5x10_dots (0x20 | 0x40)
#define _5x7_dots (0x20 | 0x00)
#define dly 0x01
unsigned char data_value = 0x00;
void LCD_init();
void LCD_command(unsigned char value);
void LCD_send_data(unsigned char value);
void LCD_4bit_send(unsigned char lcd_data);
void LCD_putstr(char *lcd_string);
void LCD_putchar(char char_data);
void LCD_clear_home();
void LCD_goto(unsigned char x_pos, unsigned char y_pos); |
PCF8574.c
| Code: |
#include "PCF8574.h"
unsigned char PCF8574_read()
{
unsigned char port_byte = 0;
i2c_start();
i2c_write(PCF8574_read_cmd);
port_byte = i2c_read(0);
i2c_stop();
return port_byte;
}
void PCF8574_write(unsigned char data_byte)
{
i2c_start();
i2c_write(PCF8574_write_cmd);
i2c_write(data_byte);
i2c_stop();
} |
PCF8574.h
| Code: | #define PCF8574_address 0x40 //A2, A1, A0, vers la masse
#define PCF8574_write_cmd PCF8574_address
#define PCF8574_read_cmd (PCF8574_address + 1)
#define SDA_pin pin_A5
#define SCL_pin pin_A4
#use I2C(Master, SDA = SDA_pin, SCL = SCL_pin)
unsigned char PCF8574_read();
void PCF8574_write(unsigned char data_byte); |
DS1307.C
| Code: | #include <DS1307.h>
#define RTC_SDA pin_A5
#define RTC_SCL pin_A4
#use i2c(master, sda=RTC_SDA, scl=RTC_SCL)
byte bin2bcd(byte binary_value);
byte bcd2bin(byte bcd_value);
void ds1307_init(void)
{
output_float(RTC_SCL);
output_float(RTC_SDA);
}
void ds1307_get_date(byte &day, byte &mth, byte &year)
{
i2c_start();
i2c_write(0xD0);
delay_us(1);
i2c_write(0x04); // Start at REG 3 - Day of week
i2c_start();
i2c_write(0xD1);
// dow = bcd2bin(i2c_read(1) & 0x7f); // REG 3
day = bcd2bin(i2c_read(1) & 0x3f); // REG 4
mth = bcd2bin(i2c_read(1) & 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(1) & 0x7f);
min = bcd2bin(i2c_read(1) & 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) IO NO TEO
while(TRUE)
{
// 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));
}
|
DS1307.h
| Code: | #ifndef __DS1307_H
#define __DS1307_H
// Define DS1307 i2c device address
#define Device_Address_DS1307_EEPROM 0xD0
void Write_Byte_To_DS1307_RTC(unsigned char, unsigned char);
unsigned char Read_Byte_From_DS1307_RTC(unsigned char);
void Write_Bytes_To_DS1307_RTC(unsigned char,unsigned char*,unsigned char);
void Read_Bytes_From_DS1307_RTC(unsigned char,unsigned char*,unsigned int);
void Set_DS1307_RTC_Time(unsigned char,unsigned char,unsigned char,unsigned char);
unsigned char* Get_DS1307_RTC_Time(void);
void Set_DS1307_RTC_Date(unsigned char,unsigned char,unsigned char,unsigned char);
unsigned char* Get_DS1307_RTC_Date(void);
#endif
|
Any help is appreciated! thank you!
And what should I do if I want to add some push button connected to the PIC to adjust time and date? |
|
|
mahatia
Joined: 14 Nov 2016
Posts: 23
|
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| Posted: Mon Nov 21, 2016 10:38 am |
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