Hi David: Sorry it took me so long to get to this, I've been swamped... * David Knierim <david_knierim at earthlink.net> [2005-02-24 12:43:54 -0500]: > Hi, > I have been hunting down an issue related to the IN10 input of the > LM93. I have observed that there is a rather large error between the > actual voltage and the voltage level displayed by sensors(1) (~ .12V). > > Please find attached a small patch that fixes this problem. The data > sheet is very ambiguous and I and another engineer made the same mistake > calculating the voltage per DAC step the first time we read the spec sheet. > > The confusion stems from an entry in the "maximum voltage" column that > is higher than the value in the "absolute maximum range" column. For 5V > only, the value in the "register reading at maximum voltage" is for the > voltage in the "absolute maximum range", NOT the "maximum voltage". Whew! Right. I seem to remember wondering: "why would just that one channel have a non-linear scale?" I should have asked you to test that one specifically back when I first wrote the driver. You might also be able to get clarification directly from NatSemi. > I have tested this patch and it fixes the problem I just outlined. > This patch is against lm_sensors 2.9.0. Thanks, I've committed it to CVS. Regards, -- Mark M. Hoffman mhoffman at lightlink.com
