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ds1621 return always 255 STRESS!!!!

 
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coconico



Joined: 31 Aug 2004
Posts: 7

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ds1621 return always 255 STRESS!!!!
PostPosted: Tue Aug 31, 2004 2:25 am     Reply with quote
I'm trying to communicate with a ds1621 whith mplab 6.61 and a pic18f452.

My problem is that it return always 255 and no temperature.

Can any one help me???

I'm really stress!
Guest
PostPosted: Tue Aug 31, 2004 3:11 am     Reply with quote
I would say an I2C problem. Have you tied the hardware address pins, mounted pullups on SCL and SDA?

You don't give much info though Confused
coconico



Joined: 31 Aug 2004
Posts: 7

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PostPosted: Tue Aug 31, 2004 5:35 am     Reply with quote
yes I have all pull-up on SDA and SCL. They are 4.7K.
jds-pic



Joined: 17 Sep 2003
Posts: 205

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Re: ds1621 return always 255 STRESS!!!!
PostPosted: Tue Aug 31, 2004 1:34 pm     Reply with quote
coconico wrote:
I'm trying to communicate with a ds1621 whith mplab 6.61 and a pic18f452.

My problem is that it return always 255 and no temperature.

Can any one help me???

I'm really stress!



ooops -- i see you have the same thread twice.

here is a copy of my other reply:

the DS1621 operates very much the same as the DS1624;
see my code for the latter here in the library section:
http://www.ccsinfo.com/forum/viewtopic.php?t=19526

jds-pic

ps
how do you expect to get any help without posting your code?
how do you expect to get any help without describing your schematic?
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