There are MANY changes needed... I cannot even find the ACK bit.. I can't imagine that it's polled... Why must you use the pic16f72??

Hi jayanthd,

This is my first time writing code ...this is the problem i am facing.....

 

Hi ja


Hi jayanthd,

In that link they are using the pic16f877 with DS1307 ,In the PIC16f877 there are using SSPCON2 register But in PIC16f72 only having the SSPCON register there is no SSPCON2 register.

 

one more i wrote plze check it.

 

Nope... I2C is far more complicated than that... You have to wait for the NACK before sending something else.

RW in the SSPSTAT register is the ACK flag.

I have been trying to get this crap version of I2C working... This chip is pin compatible with the pic16f874a, just use this!! It's a whole lot easier.


***Edit***
Ahhhh!!! No wonder.. This chip has slave only mode....

You'll have to use a software I2C...

I have written several for the pic's
https://www.electro-tech-online.com/attachments/tutorial6-zip.58016/