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Re: [Fwd: Re: sntp problems]


Gary Thomas wrote:
Laurie Gellatly wrote:
Couldn't find anyting about the timezone offset.
Looks like it needs to be added in when the time is adjusted back to 1900.


My other problem with the locking up turns out to be the new impolementation
of the I2C clock chip
I'm using and the set_current_time function that calls cyg_drv_dsr_lock.
Trouble is that the I2C clock is interrupt driven and the cyg_drv_dsr_lock
prevents the DSR from running.
I'm using a dallas 1307 variant but I don't see anything in that code that
tries to address this.
Does anyone know why cyg_drv_dsr_lock is used in set_current_time?
Anyone using an interrupt based I2C clock that might have addressed this?

Any piece of code that calls cyg_drv_dsr_lock() and does not provide a way to call cyg_drv_dsr_unlock() is broken. If this is the case, it's no wonder that your system comes to a halt when a NTP update comes in.

The 'set_current_time()' function is not part of eCos, so it's difficult
to analyze this much further.

Sorry, I missed this in .../io/wallclock/current/src/wallclock.cxx


Nonetheless, that's where I'd start looking at the problem.  As mentioned
in the note you quoted, this function should be using a mutex for protection,
not DSR locking.



Thanks ...Laurie:{)


-----Original Message-----
From: ecos-discuss-owner@ecos.sourceware.org
[mailto:ecos-discuss-owner@ecos.sourceware.org]On Behalf Of Laurie
Gellatly
Sent: Friday, 12 January 2007 9:47 PM
To: eCos discussion
Subject: RE: [ECOS] [Fwd: Re: [ECOS] sntp problems]


Thanks Jonathan, That looks promising. I'll check it out.

...Laurie:{)

-----Original Message-----
From: ecos-discuss-owner@ecos.sourceware.org
[mailto:ecos-discuss-owner@ecos.sourceware.org]On Behalf Of Jonathan
Larmour
Sent: Friday, 12 January 2007 1:44 AM
To: eCos discussion
Subject: [ECOS] [Fwd: Re: [ECOS] sntp problems]


The attached post was mis-directed. - Jifl



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--
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Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------

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