You could try my JAL compiler, which comes with i2c routines,
a.o. for the lm75. I never tried the DS1621, but when you
visit me with the chip we could give it a try (from you name I
assume you are Dutch? Ik woon in Amersfoort).

Wouter.

JAL: http://www.xs4all.nl/~wf/wouter/pic/jal

from Benjamins experience: do not twist the two i2c lines!

----------
From: Menno J Houtman <10925465@OPN-NOV1.PUK.AC.ZA>
To: PICLIST@MITVMA.MIT.EDU
Subject: I2C Headaches
Date: Friday, May 28, 1999 10:52

Hi everyone

I'm new to this list and an amateur to the PIC so please excuse stupid
questions.

I'm using a PIC16C84 to try to read the temperature from a Dallas DS1621
digital temperature IC via an I2C interface. I got the subroutines from a
MICROCHIP application note (AN515). It is actually written for a PIC16C54,
but I suppose it doesn't matter. I've managed to successfully access the
configuration registers in the DS1621 and write commands and settings to
them, but I can't get the PIC to read from the IC. No matter where I want
it to read from, the recieved byte is always the same (01010101)!

Can anyone please help me?

Thanx

Menno J Houtman