[Moved] Atmega2560 connecting with DS1337

[Thiliniv]

I write a program to set the time of DS1337. Then read the time. But when read even after several minutes , the time is not changed. I'm using AVR studio 5 and gcc compiler.

What are the possible errors of not changing the time. Further I set OSF and EOSC bits in DS1337. But nothing happend.

 

[alexxx]

But when read even after several minutes , the time is not changed.

You read the last value you registered, or you read gibberish? This is important to be clarified.
Did you make sure that the problem is a frozen clock? No way for a read procedure problem, or a buffering error?
Did you check that all IC and crystal connections are OK and that no short circuit exists on the read line?

Alexandros