my DS1621 return no ack

coconico · Joined: 31 Aug 2004 Posts: 7

When I write the configuration, I send 0xEE and on the scope I can see only 0xCC. This is my first problem. My second problem is that when I read a temp, it return no ACK.

I send the following:

0x90
0xAA
0x91

And he respond:

0x90 ACK
0xAA ACK
0x91 NACK
temp1 NACK
temp2 NACK

The temperature is always 0�C

Can anyone help me???

jds-pic · Joined: 17 Sep 2003 Posts: 205

coconico · Joined: 31 Aug 2004 Posts: 7

it all right my I2C goes very good. I had a very bad shematic from a colleg and the resistors were in serial. But they must be in pull-up.

Thank you for your reply.

rnielsen · Joined: 23 Sep 2003 Posts: 852 Location: Utah

<cleans off a small spot on the computer monitor>
<firmly grips both sides of monitor>
<bangs head on spot, sharply, several times>

AAAAAHHHHHHHhhhhhh........

<--- feels much better now.
Twisted Evil

dyeatman · Joined: 06 Sep 2003 Posts: 1934 Location: Norman, OK

It is EXTREMELY frustratiing when they dont do what you tell them to do isn't it? I hope you didn't damage anything important like your head or the monitor! Just remember, don't try it with an LCD, that could be expensive! Laughing