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EJAZMIRZAN
Joined: 02 Aug 2013
Posts: 3
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| interfacing pic16f877a with DS1307 |
 Posted: Fri Jan 17, 2014 9:56 am |
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I have written follwing code. but when I run this code "try 0" has displayed but "try 1" is not displayed & no square wave is obtained from RTC. so interfacing code gone wrong. plz help me . I read DS1307 interfacing with pic16f877a in this forum. so dont tell me to read previous posts. its urgent.
| Code: |
#include "C:\Users\user\Desktop\miniproject\phase1\rtclcd.h"
#use i2c(Slave,Slow,sda=PIN_C4,scl=PIN_C3,address=0xD0)
#define LCD_ENABLE_PIN PIN_D0
#define LCD_RS_PIN PIN_D1
#define LCD_RW_PIN PIN_D2
#define LCD_DATA_PORT D4,D5,D6,D7
#define LCD_TYPE 2
#include <lcd.c>
void main()
{
setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
setup_psp(PSP_DISABLED);
setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
setup_comparator(NC_NC_NC_NC);
setup_vref(FALSE);
// TODO: USER CODE!!
lcd_init();
lcd_putc("\f try 0");
i2c_start();
i2c_write(0xd0);
i2c_write(0x07);
i2c_write(0x12);
i2c_stop();
i2c_start();
i2c_write(0xd0);
i2c_write(0x00);
i2c_write(0x00);
i2c_write(0x00);
i2c_write(0x00);
i2c_stop();
lcd_putc(" try 1");
} |
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gpsmikey
Joined: 16 Nov 2010
Posts: 588
Location: Kirkland, WA
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| Posted: Fri Jan 17, 2014 10:04 am |
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What does your hardware look like? Is this an existing board or one you wired up yourself?
_________________
mikey
-- you can't have too many gadgets or too much disk space !
old engineering saying: 1+1 = 3 for sufficiently large values of 1 or small values of 3 |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Fri Jan 17, 2014 11:38 am |
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| Quote: | | so dont tell me to read previous posts. its urgent. |
If you read them, you would see how to do it.
| Quote: | | #use i2c(Slave,Slow,sda=PIN_C4,scl=PIN_C3,address=0xD0) |
See the ds1307 ("Previous post") driver here:
http://www.ccsinfo.com/forum/viewtopic.php?t=23255
Does he use "Slave" in his #use i2c() statement ? No. The PIC is the
master. He also doesn't use "address".
| Quote: | | #define LCD_DATA_PORT D4,D5,D6,D7 |
The CCS lcd driver does not ever do this. This will not work.
c:\program files\picc\drivers\lcd.c
You have to read, so you can learn. If you do that you will be able
to write programs that work. |
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temtronic
Joined: 01 Jul 2010
Posts: 9208
Location: Greensville,Ontario
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| Posted: Fri Jan 17, 2014 12:58 pm |
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query,hardware: Do you have a coin cell battery connected to the DS1307?
comment,software: There is a DS1307 'driver' either in the 'code library' here, or maybe in this 'discussion' forum. A 'search' should find it.
commnet,software: PCM P has an 'I2C test program' posted here, probably a GREAT place to start to confirm PIC actually 'sees' the DS1307.
I do know both work as I have both 877 and 46k22 boards running as I type.
hth
jay |
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