Are you getting any messages (when error_level=9) like "FS_poll convert:
..." ?
Paul Alfille
On Sun, Feb 1, 2009 at 10:18 PM, UnWasted <[email protected]> wrote:
> thats right...
> i tried with other type temp sensors (ds18s22 if i remember correctly)
> and the problem still exists :S
>
> it fails to read, tries to read like unpowered (short time or smth)
> then tries to increas the time until it reach to 1500ms and then it get the
> reading
>
>
> and other little problem coexists with this one... somwhere is memory leake
> :(
> if i do "stresstest", read temperatures over and over again... i't eats up
> all memory by a day or two :(
> i found a temporary solution for this... i'f memory reach to some level,
> automatic restart will occure
>
> but, no idea for that temperature conversion :/
>
> tnx for your help Paul :)
>
> UnWasted
>
>
>
> ------------------------------
> Date: Sun, 1 Feb 2009 17:40:43 -0500
>
> From: [email protected]
> To: [email protected]
> Subject: Re: [Owfs-developers] problem: ds18b20 acts wierd on temperature
> 80-95 C
>
> Of course it will be fixed. Next week, however.
>
> Let me make sure I understand the problem:
> DS18B20
> Powered temperature readings.
> Trouble with readings in 80C to 95C range. Fine outside that range.
>
> Correct?
>
>
> On Sun, Feb 1, 2009 at 5:34 PM, UnWasted <[email protected]> wrote:
>
> so there is no way i can get it fixed?
>
> ------------------------------
> Date: Fri, 30 Jan 2009 21:03:57 -0500
> From: [email protected]
> To: [email protected]
> Subject: Re: [Owfs-developers] problem: ds18b20 acts wierd on temperature
> 80-95 C
>
> >From the DS1822 datasheet:
>
> The use of parasite power is not recommended for temperatures above 100°C
> since the DS1822 may not
> be able to sustain communications due to the higher leakage currents that
> can exist at these temperatures.
> For applications in which such temperatures are likely, it is strongly
> recommended that the DS1822 be
> powered by an external power supply.
>
> What bus master, and what mode of power delivery are you using? Also which
> chip?
>
> Paul Alfille
>
> On Fri, Jan 30, 2009 at 7:59 PM, UnWasted <[email protected]> wrote:
>
> hi
>
> i'm using owfs v 2.7.13
>
> when i do simulation conversion... everything works fine .. but when any of
> sensors is in range of 80-95 degree,
> result will fail and owserver is doing :
>
> DEBUG: Transaction readin = 0
> DEBUG: Transaction CRC8 = 0
> DEBUG: Transaction end = 0
> DEBUG: Temp error. Try unpowered long temperature conversion -- 1500 msec
>
>
> after that, it reads the result :S
> and total time for one temp result is about 3,5 seconds...
>
> anybody know a solution for this?
>
>
> ps. platform is avr32 and everything else works just great!
> sry for my bad english
>
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