Pcf8563p Rtc Trouble

[-Dan-]

Hi,

I'm using the PCF8563P rtc, i can not get it to work

ive never used the i2c protocol before, so maybe ive messed it up?

ive looked through the posts already present on the forum concerning the subject
and cannot figure it out.

i would be grateful of any help

just using the basic 16f84 mcu

'rtc pins

clk_pin var portb.5 
data_pin var portb.4



'register address's 

 reg_seconds        CON  $02
 reg_minutes        con  $03
 reg_hours          con  $04
 reg_days           con  $05
 reg_weekdays       con  $06
 reg_months_century con  $07
 reg_years          con  $08
 reg_minute_alarm   con  $09
 reg_hour_alarm     con  $0A
 reg_day_alarm      con  $0B
 reg_weekday_alarm  con  $0C
 
 rtc_write var byte 
 rtc_read  var byte
 
 rtc_write=$a2
 rtc_read=$a3 
 
 
 
 'time variables
 
 seconds var byte
 minutes var byte
 hours var byte
 days var byte
 years var byte
  
  
 '-----------------------------------------------------
  'initial time variable values
  
  seconds=0
  minutes=0
  hours=18
  days=23
  years=7 
 
' -------------------------------------------------------
 
  init:
 pause 500
 lcdout $fe,1
 lcdout "Real Time Clock"
 pause 1000
 

I2CWrite data_pin,clk_pin,rtc_write,reg_seconds,[seconds]
pause 10
I2CWrite data_pin,clk_pin,rtc_write,reg_minutes,[minutes] 
pause 10
I2CWrite data_pin,clk_pin,rtc_write,reg_hours,[hours]
pause 10
I2CWrite data_pin,clk_pin,rtc_write,reg_days,[days] 
pause 10
I2CWrite data_pin,clk_pin,rtc_write,reg_years,[years]
pause 10


main:

 I2CRead data_pin,clk_pin,rtc_read,reg_seconds,[seconds]
 pause 10
 I2CRead data_pin,clk_pin,rtc_read,reg_minutes,[minutes]
 pause 10
 I2CRead data_pin,clk_pin,rtc_read,reg_hours,[hours]
 pause 10
 I2CRead data_pin,clk_pin,rtc_read,reg_days,[days]
 pause 10
 I2CRead data_pin,clk_pin,rtc_read, reg_years,[years]
 pause 10
 
            
pause 500
lcdout $fe,1  ' clear lcd
lcdout dec2 hours,":",dec2 minutes,":", dec2 seconds," "
pause 500
goto main