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Re: DateTime lost between reboots.
Just to clarify, the devboard_82 has a battery and the
devboard_lx has a capacitor.
There is a since some time a kernelconfig option to configure
how the capacitor should be charged so you don't need to use
hwtestrtc for that.
This controls the initial value of the trickle charge register.
0 = disabled (use this if you are unsure or have a non rechargable
Otherwise the following values can be OR:ed together to control the
1 = 2kohm, 2 = 4kohm, 3 = 4kohm
4 = 1 diode, 8 = 2 diodes
Allowed values are (increasing current): 0, 11, 10, 9, 7, 6, 5
----- Original Message -----
From: "Frank Brown" <firstname.lastname@example.org>
Sent: Thursday, August 19, 2004 6:29 PM
Subject: Re: DateTime lost between reboots.
> The important reason to use hwtestrtc to set up the time
> the first time-> The Axis board uses a huge capacitor to
> maintain the clock chip. For obviously good reasons, this
> capacitor has a controllable connection for charging when
> the board is powered up. This is a rather unique function
> function, and would never be part of a generic linux program.
> Axis ships the board with this port turned off, so until you
> set it up, your clock will reset to year 2k on startup. It's a
> very good idea, but one does wish you didn't have so much
> trouble discovering it.
> try hwtestrtc ? to see the syntax. I set my diodes/resistor
> to a 1 (C1).