ds1307 i2c

[Jerson]

Hii.

I wanna ask a question :

How can I stop reading from ds1307 and start writing to eeprom on the same sda scl line and after writing start reading from ds1307 again

This looks like interrupt based operation of DS1307 to read the RTC. You cannot do this. What you can do is set a bit variable while you are reading the rtc and use this to avoid writing to the eeprom.

[tamertokgoz]

This looks like interrupt based operation of DS1307 to read the RTC. You cannot do this. What you can do is set a bit variable while you are reading the rtc and use this to avoid writing to the eeprom.

the program was written : for to measure frequency and amper and if it is greater then desired value write it to the eeprom. it will be a logger

[tamertokgoz]

ADD VAR WORD
ADDO VAR WORD
FX VAR WORD


sec  var byte
mnt  var byte
hour var byte
day var byte
month var byte
year var byte

BOOT:
            LCDOut $fe, 1              
            
            LCDOut "          "
 
            LCDOut $fe,$c0," "
			pause 1000
			ADD =10


 
       
LOOP:        
     
       i2cread  SDA,scl,$D0,0,[sec,mnt,hour,day,month]

    pause 225 

           LCDOut $fe, 1              
           Lcdout hex2(hour),hex2(mnt),hex2(Sec), "-", hex2(day),".", hex2(month),"."
 
           LCDOut $fe,$c0,"Okudum Yazcam"
           
           ADD = ADD +1 
           I2CWRITE SDA,SCL,$A0,ADD,[ADD]',BOGUS
           PAUSE 250    
           
       IF BTN1 THEN OKU      
	GoTo loop					' Do it forever	
OKU : 
   FOR ADDO =10 TO ADD
        I2CREAD SDA,SCL,$A0,ADDO,[FX]',BOGUS2
            PAUSE 25
        SEROUT2  So,84,[DEC ADDO ,"--", DEC(FX), 13,10]
            PAUSE 50
            
    NEXT
GOTO LOOP
bogus:
		LCDOut $fe,1, "wrt timed out"	' I2C command timed out
		Pause 100
        RETURN               

bogus2:
		LCDOut $fe,1, "read timed out"	' I2C command timed out
		Pause 100
        RETURN               
                
End

[Jerson]

Your program is writing continuously to the eeprom. Totally unadvisable. If you have to do it this way, at least slow it down to around 1 write every minute. The interrupt operation I was suspecting is ruled out after seeing your code. I feel your frequent writes may have damaged the eeprom by now.