Re: cannot read DS2760 Battery chip on h5555: cannot enter learn mode

On St, 2008-02-13 at 08:37 +0100, Thierry Bugier wrote:
> Hello
>
> I just bought a ipaq h5555 and flashed ROM to run familiar. I cannot get
> battery status, and I cannot enter learnong mode.
>
> cat /proc/asic/battery
> Unable to read DS2760 battery monitor
>
> cat /proc/asic/ds2760
> Unable to read DS2760 battery monitor
>
> cat /proc/asic/ds2760_raw
> ff ff ff ff ff ff ff ff
> ff ff ff ff ff ff ff ff
> ff ff ff ff ff ff ff ff
> ff ff ff ff ff ff ff ff
> ff ff ff ff ff ff ff ff
> ff ff ff ff ff ff ff ff
> ff ff ff ff ff ff ff ff
> ff ff ff ff ff ff ff ff
>
>
> cat /proc/hal/battery
> AC status : 1 (online) <= ok, changes when I unplug pda
> Battery #0
> Chemistry :0xff (unknown) <= Li-polymer written on the battery pack
> status :0x08 (charging) <= ok; becomes 0x01 when AC unplugged
> voltage :0x030f (3823 mV) <= doesn't decrease when running a
> few hours unplugged
> percentage :0x00 (0%) <= I've never seen any other value
> Life (min) : 0
>
> My battery is a replacement battery pack for 54xx/55xx (1400mAh). I'm
> not sure it is an authentic HP battery. I wonder if DS2760 is present in
> the battery.

  Looks like the battery really doesn't contain ds2760 chip

>
> Because voltage never decreases, I cannot enter learn mode. As long I
> plug AC power, the battery LED flash, and load the battery. I thing it
> may be damaged when charging if it is already full.
>
> I'm wating for a new 3000 mAh battery pack. I'll test it with above
> commands.
>
> I got an other question about filesystems in familiar.
>
> I see that /home/root is in the jffs2 filesystem (mounted /) . Is it
> safe to write data on flash memory ? Why not use a SD card or RAM to
> store PIM data and user files ?

  Writes to flash memory should be safe -- jffs2 takes care for the
write optimization and wear leveling. If SD card was used, you need to
have it inserted, so you loose SD slot. and RAM -- this is a bit
difficult, every boot memory contents is destroyed.

>
>
> Regards
>

        Milan

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Received on Wed Feb 13 2008 - 13:53:28 EST